RETURN TO MAIN INDEX
SVM158-A
April, 2002
INVERTEC V350-PRO
For use with machine code numbers 10873, 10874, 10876
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Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
A AM
PS
increased by proper installation
. . . and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before
you act and be careful.
V VOL
TS
A
C
C-STICK 7018
OUTPUT
WELD
CC-STICK 6010
T
ERMINALS
TIG GT
A
W
-WIRE
CV
CV
-FLUX CORED
HO
SELECT
T
ST
AR
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4
5
3
SELECT
6
ARC CONTR
2
W
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SOFT
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CRISP
P
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N
SERVICE MANUAL
Copyright © 2002 Lincoln Global Inc.
• World's Leader in Welding and Cutting Products •
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
Download from Www.Somanuals.com. All Manuals Search And Download.
ii
ii
SAFETY
ARC RAYS can burn.
ELECTRIC SHOCK can kill.
3.a. The electrode and work (or ground) circuits
are electrically “hot” when the welder is on.
Do not touch these “hot” parts with your bare
skin or wet clothing. Wear dry, hole-free
gloves to insulate hands.
4.a. Use a shield with the proper filter and cover
plates to protect your eyes from sparks and
the rays of the arc when welding or observing
open arc welding. Headshield and filter lens
should conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.
3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full
area of physical contact with work and ground.
4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.
In addition to the normal safety precautions, if welding
must be performed under electrically hazardous
conditions (in damp locations or while wearing wet
clothing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable or
accidental contact with the workpiece or ground) use
the following equipment:
FUMES AND GASES
can be dangerous.
5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing these
• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.
fumes and gases.When welding, keep
your head out of the fume. Use enough
ventilation and/or exhaust at the arc to keep
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.
fumes and gases away from the breathing zone. When
welding with electrodes which require special
ventilation such as stainless or hard facing (see
instructions on container or MSDS) or on lead or
cadmium plated steel and other metals or coatings
which produce highly toxic fumes, keep exposure as
low as possible and below Threshold Limit Values (TLV)
using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a
respirator may be required. Additional precautions are
also required when welding on galvanized steel.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.
3.f. Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.
5.b. Do not weld in locations near chlorinated hydrocarbon vapors
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors to
form phosgene, a highly toxic gas, and other irritating
products.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of
electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.
5.c. Shielding gases used for arc welding can displace air and
cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
5.d. Read and understand the manufacturer’s instructions for this
equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your
employer’s safety practices. MSDS forms are available from
your welding distributor or from the manufacturer.
3.j. Also see Items 6.c. and 8.
5.e. Also see item 1.b.
Mar ‘95
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iii
iii
SAFETY
WELDING SPARKS can
cause fire or explosion.
CYLINDER may explode
if damaged.
6.a. Remove fire hazards from the welding area.
If this is not possible, cover them to prevent
7.a. Use only compressed gas cylinders
containing the correct shielding gas for the
the welding sparks from starting a fire.
Remember that welding sparks and hot
materials from welding can easily go through small cracks
and openings to adjacent areas. Avoid welding near
hydraulic lines. Have a fire extinguisher readily available.
process used and properly operating
regulators designed for the gas and
pressure used. All hoses, fittings, etc. should be suitable for
the application and maintained in good condition.
7.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.
6.b. Where compressed gases are to be used at the job site,
special precautions should be used to prevent hazardous
situations. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the
equipment being used.
7.c. Cylinders should be located:
•Away from areas where they may be struck or subjected to
physical damage.
6.c. When not welding, make certain no part of the electrode
circuit is touching the work or ground. Accidental contact can
cause overheating and create a fire hazard.
•A safe distance from arc welding or cutting operations and
any other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.
6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances
inside. They can cause an explosion even though they have
been “cleaned”. For information, purchase “Recommended
Safe Practices for the Preparation for Welding and Cutting of
Containers and Piping That Have Held Hazardous
Substances”, AWS F4.1 from the American Welding Society
(see address above).
7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.
7.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.
7.g. Read and follow the instructions on compressed gas
cylinders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in
Cylinders,” available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202.
6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.
6.f. Sparks and spatter are thrown from the welding arc. Wear oil
free protective garments such as leather gloves, heavy shirt,
cuffless trousers, high shoes and a cap over your hair. Wear
ear plugs when welding out of position or in confined places.
Always wear safety glasses with side shields when in a
welding area.
FOR ELECTRICALLY
powered equipment.
6.g. Connect the work cable to the work as close to the welding
area as practical. Work cables connected to the building
framework or other locations away from the welding area
increase the possibility of the welding current passing
through lifting chains, crane cables or other alternate circuits.
This can create fire hazards or overheat lifting chains or
cables until they fail.
8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.
8.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s
recommendations.
6.h. Also see item 1.c.
8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.
Mar ‘95
V350-PRO
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iv
iv
SAFETY
6. Eloigner les matériaux inflammables ou les recouvrir afin de
PRÉCAUTIONS DE SÛRETÉ
prévenir tout risque d’incendie dû aux étincelles.
Pour votre propre protection lire et observer toutes les instructions
et les précautions de sûreté specifiques qui parraissent dans ce
manuel aussi bien que les précautions de sûreté générales suiv-
antes:
7. Quand on ne soude pas, poser la pince à une endroit isolé de
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.
8. S’assurer que la masse est connectée le plus prés possible de
la zone de travail qu’il est pratique de le faire. Si on place la
masse sur la charpente de la construction ou d’autres endroits
éloignés de la zone de travail, on augmente le risque de voir
passer le courant de soudage par les chaines de levage,
câbles de grue, ou autres circuits. Cela peut provoquer des
risques d’incendie ou d’echauffement des chaines et des
câbles jusqu’à ce qu’ils se rompent.
Sûreté Pour Soudage A L’Arc
1. Protegez-vous contre la secousse électrique:
a. Les circuits à l’électrode et à la piéce sont sous tension
quand la machine à souder est en marche. Eviter toujours
tout contact entre les parties sous tension et la peau nue
ou les vétements mouillés. Porter des gants secs et sans
trous pour isoler les mains.
b. Faire trés attention de bien s’isoler de la masse quand on
soude dans des endroits humides, ou sur un plancher met-
allique ou des grilles metalliques, principalement dans
les positions assis ou couché pour lesquelles une grande
partie du corps peut être en contact avec la masse.
c. Maintenir le porte-électrode, la pince de masse, le câble de
soudage et la machine à souder en bon et sûr état defonc-
tionnement.
9. Assurer une ventilation suffisante dans la zone de soudage.
Ceci est particuliérement important pour le soudage de tôles
galvanisées plombées, ou cadmiées ou tout autre métal qui
produit des fumeés toxiques.
10. Ne pas souder en présence de vapeurs de chlore provenant
d’opérations de dégraissage, nettoyage ou pistolage. La
chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs
du solvant pour produire du phosgéne (gas fortement toxique)
ou autres produits irritants.
d.Ne jamais plonger le porte-électrode dans l’eau pour le
refroidir.
e. Ne jamais toucher simultanément les parties sous tension
des porte-électrodes connectés à deux machines à souder
parce que la tension entre les deux pinces peut être le total
de la tension à vide des deux machines.
11. Pour obtenir de plus amples renseignements sur la sûreté, voir
le code “Code for safety in welding and cutting” CSA Standard
W 117.2-1974.
f. Si on utilise la machine à souder comme une source de
courant pour soudage semi-automatique, ces precautions
pour le porte-électrode s’applicuent aussi au pistolet de
soudage.
PRÉCAUTIONS DE SÛRETÉ POUR
LES MACHINES À SOUDER À
TRANSFORMATEUR ET À
REDRESSEUR
2. Dans le cas de travail au dessus du niveau du sol, se protéger
contre les chutes dans le cas ou on recoit un choc. Ne jamais
enrouler le câble-électrode autour de n’importe quelle partie du
corps.
3. Un coup d’arc peut être plus sévère qu’un coup de soliel, donc:
a. Utiliser un bon masque avec un verre filtrant approprié ainsi
qu’un verre blanc afin de se protéger les yeux du rayon-
nement de l’arc et des projections quand on soude ou
quand on regarde l’arc.
1. Relier à la terre le chassis du poste conformement au code de
l’électricité et aux recommendations du fabricant. Le dispositif
de montage ou la piece à souder doit être branché à une
bonne mise à la terre.
b. Porter des vêtements convenables afin de protéger la peau
de soudeur et des aides contre le rayonnement de l‘arc.
c. Protéger l’autre personnel travaillant à proximité au
soudage à l’aide d’écrans appropriés et non-inflammables.
2. Autant que possible, I’installation et l’entretien du poste seront
effectués par un électricien qualifié.
3. Avant de faires des travaux à l’interieur de poste, la debranch-
er à l’interrupteur à la boite de fusibles.
4. Des gouttes de laitier en fusion sont émises de l’arc de
soudage. Se protéger avec des vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pan-
talons sans revers, et chaussures montantes.
4. Garder tous les couvercles et dispositifs de sûreté à leur place.
5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
zones où l’on pique le laitier.
Mar. ‘93
V350-PRO
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v
v
MASTER TABLE OF CONTENTS FOR ALL SECTIONS
RETURN TO MAIN INDEX
Page
Safety.................................................................................................................................................i-iv
Installation.............................................................................................................................Section A
Operation...............................................................................................................................Section B
Accessories...........................................................................................................................Section C
Maintenance .........................................................................................................................Section D
Theory of Operation .............................................................................................................Section E
Troubleshooting and Repair.................................................................................................Section F
How to Use Troubleshooting Guide............................................................................................F-2
Troubleshooting Guide................................................................................................................F-4
Test Procedures ........................................................................................................................F-15
Replacement Procedures .........................................................................................................F-51
Electrical Diagrams..............................................................................................................Section G
Parts Manual....................................................................................................................P-401 Series
V350-PRO
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SectionA-1
Section A-1
TABLE OF CONTENTS
- INSTALLATION SECTION -
Installation
Technical Specifications .............................................................................................................A-2
Safety Precautions......................................................................................................................A-3
Stacking......................................................................................................................................A-3
Tilting ..........................................................................................................................................A-3
Input Grounding Connections ....................................................................................................A-3
Power Cord Connection.............................................................................................................A-3
Connection of Wire Feeders................................................................................................A-3/A-4
Cobramatic Connection Instructions..........................................................................................A-4
Parallel Operation .......................................................................................................................A-5
V350-PRO
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A-2
A-2
INSTALLATION
TECHNICAL SPECIFICATIONS - INVERTEC V350-PRO
INPUT AC VOLTAGE & DC OUTPUT
Product Ordering Input AC
Name Information Voltage
Rated DC Output
Amps/Volt
Output
Range
continuous
Weight
with Cord
Dimensions
HxWxD
Voltage
Open
Circuit
/Duty Cycle
(
)
K1728-5
Construction
Construction
(81.0 lbs.)
(36.7 kg.)
200
350A / 34V / 60%
300A / 32V /100%
14.8” x 13.3” x
27.8”*
(373 x 338 x
706*)mm
Invertec K1728-6 208-230/
V350-
PRO
Factory
380-400/
415-460/
575
AMPS
5-425
Factory
(81.0 lbs.)
(36.7 kg.)
60/50 Hz K1728-7
80 VDC
Advanced 1& 3 Phase
Process
60/50 Hz
Advanced Process
(81.5 lbs.)
(37.0 kg.)
* Overall Length Including Handle, 27.8” (706mm)
V350-PRO INPUT CURRENT
Recommemded Fuse Sizes Base On The U.S. National Electrical Code And Maximum Machine Outputs
Input 50/60 Hz Output Recommended
300Amps @ Fuse size
Notes
Voltage
200
Phases
350Amps @
34Volts(60%)
Not
Line Cord
32Volts(100%)
Not
AWG
Note 1
1
---
Recommended Recommended
Note 2
Note 2
Note 1
208
230
380
1
1
1
76
69
Not
94
85
Not
125A
125A
---
2
4
Recommended Recommended
Not Not
Recommended Recommended
Note 1
Note 2
400
1
---
---
415
460
575
1
1
1
41
36
31
64
42
37
80A
70A
50A
6
8
8
Note 2
Note 2
200
208
230
380
400
415
460
575
3
3
3
3
3
3
3
3
41
39
36
23
22
22
19
16
50
50
42
28
27
26
23
18
80A
80A
70A
50A
50A
50A
50A
35A
8
6
8
8
8
8
8
8
Note 1. Not rated is indicated by 4-x’s in the box on the rating plate.
Note 2. When operating on these inputs, the line cord should be changed to an input conductor of 6 AWG or larger.
OUTPUT CABLES, CONNECTIONS AND LIMITATIONS
Select The output cable size based upon the following chart.
Cable sizes for Combined Length of Electrode and Work Cable (Copper) 75C rated:
DUTY CYCLE
100%
CURRENT
300
LENGTH UP TO 200FT.(61m)
200-250 FT. (61-76m)
1/0
1/0
1/0
2/0
60%
350
V350-PRO
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A-3
A-3
INSTALLATION
SAFETY PRECAUTIONS
• Initial 200VAC - 415VAC and 575VAC operation will
require an Input voltage panel setup.
• Open the access panel on the rear of the machine.
• For 200 or 230: Position the large switch to 200-
230.
WARNING
ELECTRIC SHOCK can kill.
For higher voltages: Position the large switch to
380-575.
• TURN THE INPUT POWER OFF AT
THE DISCONNECT SWITCH BEFORE
• Move the "A" lead to the appropriate terminal.
ATTEMPTING TO CONNECT OR DIS-
CONNECT INPUT POWER LINES, OUTPUT
CABLES, OR CONTROL CABLES.
POWER CORD CONNECTION
A 10 ft. power cord is provided and wired into the
machine. Follow the power cord connection instruc-
tions.
• Only qualified personnel should perform this
installation.
• Connect the green/yellow lead of the power
cord to ground per U.S.National Electrical Code.
----------------------------------------------------------------------
CAUTION
•Incorrect connection may result in equipment
SELECT SUITABLE LOCATION
damage.
--------------------------------------------------------B-L-A-C--K----------
The Invertec V350-PRO will operate in harsh environ-
ments. Even so, it is important that simple preventative
measures are followed in order to assure long life and
reliable operation.
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• The machine must be located where there is free cir-
culation of clean air such that air movement in the
back, out the sides and bottom will not be restricted.
E
R
T
E
O
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3
5
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• Dirt and dust that can be drawn into the machine
should be kept to a minimum. Failure to observe
these precautions can result in excessive operating
temperatures and nuisance shutdown.
Single Phase Input
Connect green lead to ground per National Electrical
Code.
Connect black and white leads to power.
Wrap red lead with tape to provide 600V insulation.
Three Phase Input
• Keep machine dry. Shelter from rain and snow. Do
not place on wet ground or in puddles.
• DO NOT MOUNT OVER COMBUSTIBLE SURFACES.
Connect green lead to ground per National Electric
Code.
Connect black, red and white leads to power.
CAUTION
Where there is a combustible surface directly under
stationary or fixed electrical equipment, that surface
shall be covered with a steel plate at least .06”(1.6mm)
thick, which shall extend not less than 5.90”(150mm)
beyond the equipment on all sides.
CONNECTIONS OF WIRE FEEDERS TO V350-PRO
LN-25 Connection Instructions
(Factory, Construction & Advanced Process versions
can be connected.-Not recommended for Pulse
Welding with the Advanced Process Model).
• Turn the Invertec power switch "off".
STACKING
V350-PRO cannot be stacked.
• Connect the electrode cable to the output terminal of polar-
ity required by electrode. Connect the work lead to the
other terminal.
TILTING
Place the machine directly on a secure, level surface
or on a recommended undercarriage. The machine
may topple over if this procedure is not followed.
• LN-25 with Remote Control options can be used with the
Factory Advanced Process version of the V350. The 6-Pin
(K444-1) and 14-pin (K444-2) remotes can be connected
directly to the 6-pin & 14-pin MS-style connectors. The 42
Volt Remote Voltage and Output Control (K624-1) Kit can
be connected to the V350’s 14-pin MS-style connector
using Remote Control Cable assembly K627- [ ]. LN-25s
with a K431-1 remote kit can be connected to the V350’s
14-pin MS-style connector using a K432 cable and K876
adapter. (See connection diagram S19899). Or the K432
cable could be modified with a K867 Universal Adapter
Plug (See connection diagram S19405) to connect it to the
V350’s 14-pin MS-style connector.
INPUT AND GROUNDING CONNECTIONS
• Only a qualified electrician should connect the
Invertec V350-PRO. Installation should be made in
accordance with the appropriate National Electrical
Code, all local codes and the information detailed
below.
• When received directly from the factory, multiple volt-
age machines are internally connected for 460VAC.
If 460VAC is the desired input, then the machine may
be connected to the power system without any setup
required inside the machine.
V350-PRO
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A-4
A-4
INSTALLATION
Cobramatic Connection Instructions
LN-7 Connection Instructions
A Cobramatic can only be used with the “Factory” &
“Advanced Process” versions of the 350-Pro.
• Turn the Invertec power switch "off"
An LN-7 can only be used with the “Factory” &
“Advanced Process” versions of the 350-Pro.
• Turn the Invertec power switch "off".
• Connect the control cable from the Cobramatic to
the 14-pin MS-style connector.
• Connect the K480 control cable from the LN-7 to the
14-pin MS-style connector.
• Connect the electrode cable to the output terminal
of the polarity required by electrode. Connect the
work lead to the other terminal.
• Connect the electrode cable to the output terminal of the
polarity required by electrode. Connect the work lead to
the other terminal.
• Set the meter polarity switch on the front of the
Invertec to coincide with wire feeder polarity used.
• If a remote control such as K857 is to be used with
the Cobramatic, the remote can be connected
directly to the 6-pin MS-style connector on the front
of the Invertec or use a K864 adapter to connect
the cobramatic and the remote to the 14-pin MS-
style connector.
• Set the meter polarity switch on the front of the Invertec
to coincide with wire feeder polarity used. The wire
feeder will now display the welding voltage.
• If K480 is not available, see connection diagram
S19404 for modification of K291 or K404 LN-7 input
cable with K867 Universal Adapter Plug.
• If a remote control such as K857 is to be used with the
LN-7, the remote can be connected directly to the 6-pin
MS-style connector on the front of the Invertec or use a
K864 adapter to connect the LN-7 and the remote to the
14-pin MS-style connector. (See connection diagram
S19901)
TIG Module K930-2
The TIG Module connects to the Factory and Advanced
Process V350-Pro versions with a K936-1 (9-14 pin)
control cable. Connect the K936-1 to the MS-style
connector.
LN-10 Connection Instructions
An LN-10 can only be used with the “Factory” &
“Advanced Process” versions of the 350-Pro.
The TIG Module can also be used with the V350-Pro
Construction version. A K936-4 control cable is
required to supply 115VAC to the TIG Module from an
external 115VAC supply.
•
•
Turn the Invertec power switch "off"
Connect the K1505 control cable from the LN-10 to the
14-pin MS-style connector.
•
Connect the electrode cable to the output terminal of
polarity required by the electrode. Connect the work lead
to the other terminal.
General Instructions for Connection of Wire
Feeders to V350-Pro
Wire feeders other than those listed above may be
used provided that the auxiliary power supply rating of
the V350-Pro is not exceeded. K867 universal adapter
plug is required. See connection diagram S24985 on
page F-4.
•
•
Set the meter polarity switch on the front of the Invertec
to coincide with wire feeder polarity used.
See the LN-10 manual for details on accessing Control
DIP Switch
LN-742 Connection Instructions
REMOTE CONTROL OF INVERTEC
Remote Control K857, Hand Amptrol K963 and Foot
Amptrol K870.
An LN-742 can only be used with the “Factory” &
“Advanced Process” versions of the 350-Pro.
• Turn the Invertec power switch "off"
• Either a K591 or a K593 Input cable assembly is
required to connect the LN-742 to the Invertec.
• Connect the control cable from the LN-742 to the
14-pin MS-style connector.
• Connect the electrode cable to the output terminal
of the polarity required by electrode. Connect the
work lead to the other terminal.
UNDERCARRIAGE MOUNTINGS
MOUNTING HOLE LOCATIONS
NOTE: MOUNTING SCREWS CAN NOT PROTR
UDE MORE THAN
CHES INSIDE THE MACHINE.
0.5 IN
3.50
• Set the meter polarity switch on the front of the
Invertec to coincide with wire feeder polarity used.
The wire feeder will now display the welding volt-
age.
1/4-20 NUT (4 PLACES)
5.50
• If a remote control such as K857 is to be used with the
LN-742, the remote can be connected directly to the 6-pin
MS-style connector on the front of the Invertec or use a
K864 adapter to connect the LN-742 and the remote to
the 14-pin MS-style connector.
10.00
4/01
11.8
4
M19527
V350-PRO
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A-5
A-5
INSTALLATION
PARALLEL OPERATION
The V350-Pro can be paralleled in CC mode. For best
results, the currents of each machine should be rea-
sonably well shared. As an example, with two
machines set up in parallel for a 400 amp procedure,
each machine should be set to deliver approximately
200 amps, not 300 amps from one and 100 amps from
the other. This will minimize nuisance shutdown con-
ditions. In general, more than two machines in paral-
lel will not be effective due to the voltage requirements
of procedures in that power range.
To set machine outputs, start with output control pots
and arc control pots in identical positions. Use the
output control pots to balance the currents and main-
tain the desired current. The arc control pots should
be kept identical on the two machines.
V350-PRO
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A-6
A-6
NOTES
V350-PRO
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Section B-1
Section B-1
TABLE OF CONTENTS
- OPERATION SECTION -
Operation...............................................................................................................................Section B
Safety Precautions......................................................................................................................B-2
General Description..............................................................................................................B-2
Duty Cycle............................................................................................................................B-2
Operational Features and Controls ............................................................................................B-2
Weld Mode Select.......................................................................................................................B-3
CC-Stick Soft..................................................................................................................B-3
CC-Stick Crisp................................................................................................................B-3
TIG GTAW .......................................................................................................................B-4
CV-Wire...........................................................................................................................B-4
CV-Innersheild.................................................................................................................B-4
Advanced Process Panel............................................................................................................B-5
Controls ......................................................................................................................................B-6
Electrode Material.......................................................................................................................B-6
Hot Start & Arc Control...............................................................................................................B-6
Weld Mode Details......................................................................................................................B-7
Pulse Programs ..........................................................................................................................B-8
Lower Case Front .......................................................................................................................B-9
CV Modes.............................................................................................................................B-9
TIG Mode .............................................................................................................................B-9
CC-Stick Modes...................................................................................................................B-9
Types of Remote Output Control................................................................................................B-9
Types of Remote Weld Terminal Control ....................................................................................B-9
Auxiliary Power .........................................................................................................................B-10
Limitations.................................................................................................................................B-10
Recommended Processes........................................................................................................B-10
Descriptions of Special Welding Processes Available on this Machine...................................B-11
V350-PRO
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B-2
B-2
OPERATION
SAFETY PRECAUTIONS
DUTY CYCLE
The V350-Pro is rated at 350 amps, 60% duty cycle
(based on a 10 minute cycle). It is also rated at 300
amps, 100% duty cycle.
WARNING
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and
ground.
OPERATIONAL FEATURES and CONTROLS:
UPPER CONTROL PANEL
1. AMPS Meter
• Always wear dry insulating gloves.
------------------------------------------------------------------------
FUMES AND GASES can be dangerous.
• Keep your head out of fumes.
• Prior to STICK or TIG operation (current flow), the
meter displays preset current value (+/- 2 amps or
+/- 3%, whichever is greater).
• Prior to CV operation, the meter displays four dash-
es indicating non-presettable AMPS.
• Use ventilation or exhaust to remove
fumes from breathing zone.
• During welding, this meter displays actual average
amps.
------------------------------------------------------------------------
WELDING SPARKS can cause fire or
explosion.
• After welding, the meter holds the actual current
value for 5 seconds. Output adjustment while in the
"hold" period results in the "prior to operation" char-
acteristics stated above. The displays blink indicat-
ing that the machine is in the "Hold" period.
• Keep flammable material away.
• Do not weld on closed containers.
------------------------------------------------------------------------
ARC RAYS can burn eyes and skin.
• Wear eye, ear and body
2. VOLT METER
• Prior to CV operation (current flow), the meter dis-
plays desired preset voltage value (+/- .5V).
• Prior to STICK or TIG operation, the meter displays
the Open Circuit Voltage of the Power Source or four
dashes if the output has not been turned on.
• During welding, this meter displays actual average
volts.
protection.
------------------------------------------------------------
See additional warning information at
front of this operators manual.
• After welding, the meter holds the actual voltage
value for 5 seconds. The displays blink indicating
that the machine is in the "Hold" period.
• Output adjustment while in the "hold" period results
in the "prior to operation" characteristics stated
above.
-----------------------------------------------------------
GENERAL DESCRIPTION
The Invertec V350-Pro offers multi-process CV, CC,
and DC welding and is rated 350 amps, 34 volts at a
60% duty cycle. The V350-Pro is available in either a
Construction version (no wire feeder connection and
auxiliary power) and a Factory & Advanced Process
versions (includes wire feeder connection and related
power)
3. OUTPUT CONTROL
• Output control is conducted via a single turn poten-
tiometer.
• Adjustment is indicated by the meters as stated
above.
• When in TIG modes, this control sets the maximum
welding current. Full depression of a foot or hand
Amptrol results in the preset level of current.
.
• The factory model is the construction model with
the addition of the Wire Feeder/Remote Adapter.
• In this form, the V350-Pro provides the hardware to
power and connect to 24, 42 or 115 VAC wire feeders.
4. WELD TERMINALS-REMOTE / ON
• Two status lights indicate the location of trigger con-
trol as determined by the "WELD TERMINALS" push
button.
• If trigger control is local "weld terminals on", the ON
display will be lit.
• The advanced process model is the factory model
with an advanced process panel installed in place of
the standard mode panel. In this form, the V350-Pro
provides access to the 5 standard weld modes (Stick
Soft, Stick Crisp, TIG, CV-Wire, CV-Innershield),
gouge, constant power and pulse MIG weld modes.
• If trigger control is remote "weld terminals remotely
controlled", the REMOTE display will be lit.
V350-PRO
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B-3
B-3
OPERATION
• The unit will power up in "pre-determined preferred"
trigger modes.
7. WELD MODE SELECT - FACTORY AND
CONSTRUCTION (See Figure B.1)
The Mode Control button selects from the following
welding modes.
STICK = ON
CV = REMOTE
TIG = REMOTE if remote output controls are attached
to the machine.
TIG = 0N if remote output controls are not attached to
the machine.
CC-STICK SOFT: The Stick Soft process features con-
tinuous control ranging from 5 to 425 amps. This mode
was intended for most SMAW applications, and Arc
Gouging.
For all versions, these trigger modes can be over-ridden
(switched) with the WELD TERMINALS push button. When
changed, the unit will power up in the configuration it was in
when it was last powered down.
•
Arc Gouging: Setting the output of the Stick Soft
mode to 425 amps will enable the arc-gouging
mode. The actual output current will depend on the
size of carbon used. The recommended maximum
size carbon is 5/16".
5. THERMAL
• This status light indicates when the power source has been
driven into thermal overload. If the output terminals were
"ON", the "ON" light will blink indicating that the output will
be turned back on once the unit cools down to an accept-
able temperature level. If the unit was operating in the
"REMOTE" mode, the trigger will need to be opened
before or after the thermal has cleared and closed after the
machine has cooled down to an acceptable temperature to
establish output.
• The Hot Start control regulates the starting current
at arc initiation. Hot Start can be adjusted from min-
imum (0), with no additional current added at arc
start, to maximum (10), with double the preset cur-
rent or 425 amps (max of machine) added for the
first second after arc initiation.
• The Arc Control regulates the Arc Force to adjust
the short circuit current. The minimum setting (-10)
will produce a "soft" arc and will produce minimal
spatter. The maximum setting (+10) will produce a
"crisp" arc and will minimize electrode sticking.
6. CONTROL-REMOTE / LOCAL
• Two status lights indicate the location of output control as
pre-determined by the power sources auto-configure sys-
tem.
• The LOCAL display will be lit when control is at the power
source.
• The REMOTE display will be lit when a remote pot/control
is detected.
These Output Control configurations can be overridden
(switched) with the CONTROL push button. When changed,
the unit will power up in the configuration it was in when it
was last powered down.
CC-STICK CRISP:The Stick Crisp mode features con-
tinuous control from 5 to 425 amps. This mode was
intended primarily for pipe welding applications.
• The Hot Start control regulates the starting current at
arc initiation. Hot Start can adjust starting current up
or down by 25% of the preset value. The recom-
mended setting for Hot Start is 5 where the initial cur-
rent is equal to the preset current.
Hidden Middle Control Panel – Mode Panel
FIGURE B.1.
2
3
1
5
6
AMPS
VOLTS
CONTROL
SELECT
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
4
SELECT
HOT START
ARC CONTROL
5
0
6
CC-STICK SOFT 7018
CC-STICK CRISP 6010
TIG GTAW
4
-2
+2
7
3
7
-4
+4
+6
+8
2
8
-6
-8
CV-WIRE
1
0
CV-FLUX CORED
SELECT
-10
+10
10
SOFT
CRISP
8
11
12
9
10
V350-PRO
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B-4
B-4
OPERATION
CV-WIRE: The CV-WIRE mode features continuous
control from 10 to 40 volts. The mode was intended for
most GMAW, FCAW, and MCAW applications.
• The Arc Control regulates the Arc Force to adjust the
short circuit current. The minimum setting (-10) will
produce a "soft" arc and will produce minimal spat-
ter. The maximum setting (+10) will produce a "crisp"
arc and will minimize electrode sticking.
• The Hot Start control is not used in the CV-WIRE
mode.
• The Arc Control regulates pinch effect. At the mini-
mum setting (-10), minimizes pinch and results in a
soft arc. Low pinch settings are preferable for weld-
ing with gas mixes containing mostly inert gases. At
the maximum setting (+10), maximizes pinch effect
and results in a crisp arc. High pinch settings are
preferable for welding FCAW and GMAW with CO2.
TIG GTAW: The TIG mode features continuous control
from 5 to 425 amps. The TIG mode can be run in either
the TIG touch start or high frequency (optional equip-
ment required) assisted start mode.
• The Hot Start control selects the starting mode
desired. A setting of less than 5, the TIG lift start
mode is selected. The OCV is controlled below 10v
and the short circuit "TIG touch" current is main-
tained at 25 amps independent of the preset current.
When the tungsten is lifted, an arc is initiated and
the output is regulated at the preset value. Hot start
settings between 0 and 5 regulate the arc initiation
current. A setting of 5 results in the most positive arc
initiation. A setting of 0 reduces hot start.
CV-INNERSHEILD: The CV-INNERSHEILD mode
features continuous control from 10 to 45 volts. This
mode was designed for self-shielded flux cored wires
that require tight voltage control.
• The Hot Start control is not active in the CV-FLUX
CORED mode.
• The Arc Control regulates pinch effect. At the mini-
mum setting (-10), minimizes pinch and results in a
soft arc. At the maximum setting (+10), maximizes
pinch effect and results in a crisp arc. Most self-
shielded wires work well at an Arc Control setting of 5.
• Hot Start settings between 5 and 10, select high fre-
quency assisted starting TIG mode. In this range,
the OCV of the machine is controlled between 50
and 70 volts. If using the Lincoln K930-1 TIG
Module, set the Hot start to 10 for maximum OCV.
• The Arc Control is not used in the TIG mode.
TIG SOLENOID OPTION
The Solenoid only operates when the V350 is in the
TIG mode. If the Weld Terminals are in “Remote” then
the solenoid will open when the arc start switch is
closed. The solenoid will close after the arc switch has
been opened and the post flow time expired.
If the Weld Terminals are turned “ON”, then the sole-
noid will open when the electrode is touched to the
work. The electrode needs to remain in contact with
the work to allow for gas coverage before attempting to
start the arc. The solenoid will close after the arc has
been broken and the post flow time expired.
V350-PRO
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B-5
B-5
OPERATION
• Pulsed Modes
In Pulse Modes;
7A. ADVANCED PROCESS PANEL
(See Figure B.2)
The work point will be in the Amps window and
should be set close to the wire feed speed of the
wire feeder in inches per minute. The Volts window
will have SPd displayed indicating Wire Feed
Speed. Once current starts flowing and during the 5
second “Hold” feature the displays will show amps
and volts.
To program Welding modes. SELECT knob is used to
Scroll through all Welding modes. The MEMORY but-
ton is used to store and access Welding modes into
locations M1 thru M8.
Modes:
In addition to the 5 welding modes described in SEC-
TION 7, the Advanced Process Panel allows you to
select the Following additional modes.
Pulse Mode features that are displayed while select-
ing a Welding pulse mode are listed below;
Steel - .030, .035, .045, .052 – Argon Blends
Stainless Steel - .030, .035, .045 – Argon Blends &
Helium/Argon Blends
Aluminum - .035, 3/64, 1/16 – 4043 & 5356
Metal Core - .045, .052 – Argon Blends
Nickel - .035, .045 – Argon/Helium blends
• Power Mode
In the Power Mode;
The work point will be in the Volts window. The Amp
window will have CP displayed indicating Constant
Power. Once current starts flowing and during the 5
second “Hold” feature the displays will show Volts
and Amps respectively. Refer to the detailed expla-
nation at the end of this section.
Refer to the detailed explanation at the end of this
section.
• Gouge
Air Carbon Arc Cutting (CAC-A) is a physical means
of removing base metal or weld metal by using a car-
bon electrode, an electric arc and compressed air.
ADVANCED PROCESS PANEL VERSION
FIGURE B.2
OUTPUT KNOB
AMPS
OLTS
V
7A
CONTROL
SELECT
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
ADJUST
MEMORY
SELECT
SELECT
MEMORY BUTTON
(M1 THRU M8)
ADJUSST KNOB
(0 THRU 10-HOT START)
(-10 THRU 0 AND
0 THRU +10-ARC CONTROL)
SELECT KNOB
(SCOLLS WELDIING PRROCESSES)
SELECT BUTTON
(HOT START OR ARC CONTROL)
V350-PRO
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B-6
B-6
OPERATION
5. After all adjustments have been made press and
hold the Memory button until the display changes.
The right and the left window will display what
memory to save in, lets say M1. To store in M1 push
the Memory button again to save the Pulse Mig
mode to memory M1.
CONTROLS: (See Figure B.2.)
The MEMORY button and SELECT knob are used
together to select a welding process and store it in
memory (M1 thru M8). The SELECT knob scrolls
through the, welding process modes and memory M1
thru M8. The MEMORY button stores the welding
process in memory.
• SELECT button" (The right button) selects between
the "Hot Start" or "Arc Control". The < will indicate the
active feature shown below.
6. The display in the digital windows will read as follows:
M1 Pulse MIG
Steel .035
Argon Blends
Arc Cntrl 1.2
7. Saving or entering a second welding mode to a
memory, M2. Turn the Select knob until the desired
welding process mode is displayed in right digital
window. Then follow steps 1 thru 6.
Press the Memory button till the digital window
reads,
Right Digital Window
"Hot Start"
(-10 to 0 +10)
"Arc Control" (0 to 10) <
• The ADJUST knob adjusts the desired settings for
the Hot Start or Arc Control feature that is active.
Save to MEM
M2
WELDING PROCESS MODES AVAILABLE
Press the Memory button again and the New
Welding process is saved in M2.
Stick SMAW, TIG GTAW
Gouge CAG, CV MIG GMAW
CV Flux Core, Pulse MIG
8. Adjust the output control to the correct wire feed set-
ting and the V350-PRO is ready to weld again.
(Note: The wire feed speed setting is not stored in
memory and will need to be reset.)
ELECTRODE MATERIAL
Steel, Metal Core, Stainless, Aluminum, Nickel
9. Adjust the Arc Control and note that the M1 goes
away indicating that the V350-PRO settings no
longer match what is stored in memory. Going back
to the original settings will not bring the M1 back.
You will need to push the Memory button to recall
the original settings in M1.
EXAMPLE OF SAVING WELDING MODES TO MEM-
ORY
The following example is how to select Pulse MIG
using .035 steel and store it into memory.
1. Turn the Select knob until welding process is dis-
Note: After all memory’s M1 thru M8 are used and the
welder needs to store another welding process, a new
welding process will overwrite what was originally in
the memory and will read,
played.
LEFT WINDOW
Pulse MIG
RIGHT WINDOW
Argon Blends
Steel .035
Save to MEM
M1 Overwrite
2. Wait two seconds and the right window will display
Arc Control on the second line on the right side.
M1 which stored Pulse Mig is Overwritten with the new
welding process.
Pulse MIG
Argon Blends
Steel .035
Arc Cntrl ### <
LN-10/DH-10 Wire Feeder Compatibility Note:
The LN-10 and DH-10 feeders can be used to pulse
weld and in the power mode with the panel. The dis-
plays on the LN-10 & DH-10 do not show the wire feed
speed or power.
3. SPd is displayed in the upper right Volts window.
The left Amps window matches the desired wire
feed speed that is set on the wire feeder. Adjust the
Output knob until desired number is displayed.
4. Start welding. If the arc length is too short turn the
Output knob up. If the arc length is too long turn the
Output knob down.
8. HOT START and ARC CONTROL features
have different functions depending on the welding
Mode that is active. Each feature is described under
the welding mode heading. (See Item 7 or 7.A for
specified Mode Operations) (See Figure B.1 or B.2)
The Arc Control which is displayed in the right digital
window can be used to fine-tune the arc length and
characteristics.
V350-PRO
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B-7
B-7
OPERATION
WELD MODE DETAILS:
Mode
Range
Comments
Stick Soft
5 - 425 amps The stick soft mode is the best selection for general stick
applications.
Arc Control = Arc Force
Hot Start = Initial hot start current (min = start a match set amps, Max.
= greatest hot start current) During hot start, arc force is set
at high and is fast response.
For gouging applications: Turn current up to 425 amps.
Stick Crisp
5 - 425 amps The stick crisp mode features an aggressive arc force routine well suit-
ed for Exx10, Exx11 series electrodes.
Arc Control = Arc Force
Hot Start = Initial hot start current (Mid range = welding current and will
vary up and down with knobcontrol.) During hot start, arc
force is set at high and is fast response.
For gouging applications: Turn current up to 425 amps.
GTAW (Tig mode)
5 - 425 amps The tig mode produces a soft, steady constant current waveform for
either touch start or high frequency assisted start DC GTAW applica-
tions.
Hot Start = Min to Mid range = Touch start with low OCV
Mid to Max range = High frequency assistedstarting with adjustable
OCV up to 70 volts.
GMAW - CV
FCAW-SS
10 - 45 volts
10 - 45 volts
The GMAW - CV mode is the best selection for general MIG welding,
Metal core, and gas shielded applications.
Arc Control = Pinch (Min = min pinch, softest arc),
(Max = max pinch, crispest arc)
The FCAW-SS mode is designed for Self Shielded Innershield products
that require tight voltage control. For example; the NR 203 series or NR
207)
Arc Control = Pinch (Min = min pinch, softest arc),
(Max = max pinch, crispest arc, )
ADVANCED PULSE PANEL WELDING PROGRAMS
Gouging
60 - 425 amps The gouging mode is a low power version of other Lincoln welding
equipment gouging programs, for example a PowerWave 455.
GMAW - Power
1 - 18 (No Units) Refer to the detailed explanation at the end of this section.
This mode does not allow preset voltage. In the short arc GMAW
mode, the set KW will not equal the actual Volts * Amps. The set
power is regulated only when an arc is present. During shorting, the
output is allowed to increase to clear the short.
V350-PRO
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B-8
B-8
OPERATION
PULSE PROGRAMS:
MODE
Range (IPM*)
COMMENTS
.030 Steel
.035 Steel
.045 Steel
.052 Steel
.045 Metal Core
.052 Metal Core
.030 Stainless Ar Blends
.030 Stainless He Ar CO2
.035 Stainless Ar Blends
.035 Stainless He Ar CO2
.045 Stainless Ar Blends
.045 Stainless He Ar CO2
.035 Aluminum 4043
.035 Aluminum 5356
3/64 Aluminum 4043
3/64 Aluminum 5356
1/16 Aluminum 4043
1/16 Aluminum 5356
65 - 1200
55 - 800
50 - 700
75 - 550
50 - 650
50 - 500
85 - 770
110 - 770
65 - 770
75 - 770
50 - 600
50 - 600
100 - 700
115 - 740
80 - 550
85 - 700
75 - 325
75 - 450
The V350 pulse programs are non-synergic and allow independent
control of the wire feed speed (at the wire feeder) and the arc
length. The Output Control Knob on the V350, adjusts an "SPD"
value. Similar to trim, the "SPD" value indicates the relative arc
length setting. The "SPD" value displayed on the V350 may not
match the actual wire feed speed! The value of "SPD" is meant
to be a point at which to set the arc length relative to the wire feed
speed and should be set the same as actual speed for a starting
point. Depending on the application, the "SPD" value can be adjust-
ed to obtain the desired arc length. Refer to the detailed explana-
tion at the end of this section.
The operation of the Arc Control knob on the V350 is similar to the
PowerWave series. As Arc Control is increased, the frequency is
increased and the background reduced. Decreasing Arc Control will
reduce frequency and increase background current. Arc Control
acts to fine tune the arc plasma to the specific application.
Preferred gas selections:
Steel Argon Blends = Argon with CO2 additions from 2 to 20
% or Oxygen additions from 2 to 5%.
Stainless Argon Blends = Argon with Oxygen additions up to 2%.
Stainless He Ar CO2 = ~ 90% Helium, 7 1/2 % Argon 2 1/2 CO2
Aluminum 100% Argon
.035 Nickel Alloys (Non Adaptive)
.045 Nickel Alloys (Non Adaptive)
80 - 700
75 - 550
The Nickel Alloy pulse programs are non adaptive. The operator
sets the output control knob to deliver the correct arc length at
desired wire feed speed and stick out. While welding, the operator
manipulates the stick out to maintain the correct arc length. This
method of operation produces very stable arc performance consid-
ering the nature of nickel alloys.
Preferred gas: Argon/Helium Blends = for the best results add
helium to the argon base from 0-25%.
PULSE ON PULSE
.035 4043 (4x Pulse on Pulse) 120 - 600
3/64 4043 (4x Pulse on Pulse) 85 - 400
.035 5356 (5x Pulse on Pulse) 130 - 700
3/64 5356 (5x Pulse on Pulse) 100 - 550
Arc Control = Pulse on Pulse frequency. For faster travel
speed welds, the arc control should be increased.
For larger puddle, slower travel speeds, the arc control
should be decreased. Refer to the detailed explanation at the
end of this section.
*IPM (INCHES PER MINUTE)
V350-PRO
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B-9
B-9
OPERATION
LOWER CASE PANEL
The output studs, line switch and remote connector are
located on the lower case front.
Types of Remote OUTPUT CONTROL
• The Invertec V350-Pro’s Output Control can be con-
trolled by either a potentiometer connected between
77 & 75 with the wiper connected to 76 or a 0V to
10V DC supply connected between 76 & 75. (76
needs to be positive)
9. Both terminals are "Twist-Mate" connectors.
The Negative terminal is configured to accept the
pass through gas system.
10. The METER POLARITY switch is located above
the output connectors. The switch provides a work
connection for wire feeder voltmeters. Place the
switch in the position of the electrode polarity indi-
cated by the decal. The switch does not change
the welding polarity.
• 14-Pin Ms-style connector lead 75 is pin G, lead 76
is pin F and lead 77 is pin E.
• 6-Pin Ms-style connector lead 75 is pin C, lead 76 is
pin B and lead 77 is pin A.
Potentiometer Control
11. 6-pin MS-style connector for remote control.
12. 14-pin MS-style connector for wire feeder connec-
• The total resistance should be between 2000 ohms
(2K) and 10,000 ohms (10K)
• The machine output will be at minimum when lead
76 (wiper) is at the end of the potentiometer that is
connected to 75. The machine’s output will increase
as the wiper of the potentiometer is moved to the end
that is connected to 77. (Note: In TIG mode, moving
the lead 76 (wiper) to lead 77 would produce the cur-
rent that has been set by the Invertec V350-Pro’s
front panel Output Control.)
tion and remote control.
REMOTE CONTROL of the OUTPUT CONTROL and
WELD TERMINALS
The Invertec V350-Pro has auto sensing of remote out-
put controls. If after connecting or removing a remote,
the Invertec V350-Pro did not configure the way you
would like the local or remote control settings can be
changed by pushing the OUTPUT CONTROL or
WELD TERMINAL button. (A user cannot select
between the 6 and 14 pin MS-style connectors.)
• Remotes of this type offered by Lincoln Electric are
the K857, K812 and K870.
Voltage Control
• The supply must be an isolated supply. (Not refer-
enced to earth ground, any auxiliary power from the
Invertec V350-Pro or the welding output) The supply
should be capable of supplying at least 20mA.
• 0 volts supplied to 76 will set the Invertec V350-Pro
to minimum output for the mode that has been
selected while 10 volts supplied to 76 will set the
Invertec V350-Pro to the maximum output for the
mode. (Note: In TIG mode, 10 volts supplied to lead
76 would produce the current that has been set by
the Invertec V350-Pro’s front panel Output Control.)
CV modes
• The remote will default to the 14-pin MS-style con-
nector if a remote is connected. If no remote is con-
nected to the 14-pin MS-style connector then the
remote will default to the 6-pin MS-style connector if
a remote is connected to it.
• In all of the CV modes, the WELD TERMINAL con-
trol will default to REMOTE.
TIG mode
• The remote will default to the 6-pin MS-style if a
remote control is connected to the 6-pin MS-style
and to the 14-pin MS-style connector. If a remote is
not connected to the 6-pin MS-style connector then
the remote will default to the 14-pin MS-style con-
nector if a remote is connected.
• If a remote control is connected to any of the MS-
style connectors the WELD TERMINAL control will
default to REMOTE. If there are not any remote con-
trol devices attached the WELD TERMINAL control
will default to ON.
Types of Remote WELD TERMINAL Control
• The Invertec V350-Pro’s Weld Terminals can be con-
trolled from each of the MS-style connectors. The
circuit has a nominal OCV of 15VDC and requires a
dry contact closure (less than 100 ohms) to activate
the output of the Invertec V350-Pro.
• 14-Pin MS-style connector, the Weld Terminals are
controlled from pin C (lead 2) and pin D (lead 4). Pin
C is positive.
• 6-Pin MS-style connector, the Weld Terminals are
controlled from pin D (lead 2) and pin E (lead 4). In
the 6-pin MS-style connector pin D is positive.
CC-Stick modes
• The remote will default to only the 6-pin MS-style
connector if a remote is connected to it.
• The WELD TERMINAL control will default to ON with
or without a remote connected.
V350-PRO
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B-10
B-10
OPERATION
AUXILIARY POWER
• 115VAC, 42VAC and 24VAC power is available from
the 14-pin MS-style connector. The Construction
model of the Invertec V350-Pro does not have the
14-pin MS-style connector) These supplies are
intended to supply power for auxiliary equipment like
wire feeders and the TIG Module.
• 115VAC supply is rated at 2 amps and is protected by a 3.5
amp breaker.
• 42 VAC supply is rated at 5.5 amps and is protected
by a 6 amp breaker.
• 24 VAC supply is rated at 5.5 amps and is protected
by a 6 amp breaker.
LIMITATIONS
• The V350-Pro is not recommended for processes
other than those listed.
• The V350-Pro can only be used with the recom-
mended equipment and options.
RECOMMENDED PROCESSES
Properly equipped, the Invertec V350-Pro supports
GMAW-P, FCAW, SMAW, GTAW and CAC-A
processes for a variety of materials, including mild
steel, stainless steel, cored wires, and aluminum.
V350-PRO
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B-11
B-11
OPERATION
• For steel, use 75/25 Ar/CO2 shield gas.
• For Stainless, select a Helium blend Tri-Mix.
• For Aluminum, use 100% Ar.
SPECIAL WELDING PROCESSES
AVAILABLE ON THIS MACHINE
POWER MODE™
The Power Mode™ process was developed by Lincoln
to maintain a stable and smooth arc at low procedure
settings which are needed to weld thin metal without
pop-outs or burning-through. For Aluminum welding, it
provides excellent control and the ability to maintain
constant arc length. This results in improved welding
performance in two primary types of applications.
Start by setting the wire feed speed based upon mate-
rial thickness and appropriate travel speed. Then
adjust the Output knob as follows:
• For steel, listen for the traditional “frying egg”
sound of a good short-arc MIG procedure to know
you have the process set correctly.
• Short Arc MIG at low procedure settings.
• Aluminum MIG welding.
• For aluminum, simply adjust the Output knob until
the desired arc length is obtained.
Note the Volts display is simply a relative number and
DOES NOT correspond to voltage.
Power Mode™ is a method of high speed regulation of
the output power whenever an arc is established. It
provides a fast response to changes in the arc. The
higher the Power Mode Setting, the longer the arc. If a
welding procedure is not established, the best way to
determine the Power Mode Setting is by experimenta-
tion until the desired output result is established.
Some procedure recommendations appear in the table
below.
In the Power Mode variables need to be set:
• Wire Feed Speed
• Output
• Arc Control
Setting up a Power Mode procedure is similar to set-
ting a CV MIG procedure. Select a shielding gas
appropriate for a short arc process.
Recommended Welding Procedures for Power Mode
Aluminum 4043
E4043
Aluminum 5356
E5356
Mild Steel
L56
Mild Steel
L56
Mild Steel
L56
Mild Steel
L56
Mild Steel
L56
Mild Steel
L56
Stainless Steel
E308L
Stainless Steel
E308L
MATERIAL
WIRE
WIRE SIZE
GAS
0.035
0.035
0.025
0.025
0.030
0.030
0.035
0.035
0.030
0.035
100% Ar.
125 / 2.25
100% Ar.
125 / 1.75
100% CO2
Not Recommended
75/25% Ar/CO2
100 / 0.8
100% CO2
Not Recommended
75/25% Ar/CO2
90 / 1.0
100% CO2
75/25% Ar/CO2
Tri-mix
Tri-mix
22 ga.
20 ga.
18 ga.
16 ga.
150 / 2.5
200 / 3.75
300 / 7.75
150 / 2.3
200 / 3.0
300 / 6.85
120 / 1.0
140 / 1.7
120 / 1.0
140 / 1.5
100 / 0.7
110 / 1.5
100 / 1.0
110 / 1.5
80 / 1.5
110 / 2.0
140 / 2.5
50 / 0.5
110 / 2.0
130 / 2.7
100 / 2.5
125 / 3.0
100 / 2.5
125 / 3.0
190 / 2.0
260 / 3.0
330 / 5.0
190 / 2.0
260 / 3.0
330 / 4.5
125 / 2.0
160 / 2.3
230 / 3.5
300 / 6.0
125 / 2.0
160 / 2.3
230 / 3.5
300 / 6.0
14 ga.
12 ga.
10 ga.
400 / 9.0
450 / 9.5
400 / 7.5
450 / 8.0
160 / 3.8
200 / 5.0
240 / 6.5
160 / 3.5
200 / 4.5
240 / 7.0
210 / 3.0
270 / 5.0
325 / 6.5
190 / 3.5
230 / 6.0
300 / 7.0
500 / 10.0
500 / 8.5
600 / 9.5
700 / 11
3/16
1/4
600 / 11.25
400 / 7.0
400 / 7.5
V350-PRO
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B-12
B-12
OPERATION
Pulsed MIG is an advanced form of welding that takes
the best of all the other forms of transfer while minimiz-
ing or eliminating their disadvantages. Unlike short cir-
cuit, pulsed MIG does not create spatter or run the risk
of cold lapping. The welding positions in pulsed MIG are
not limited as they are with globular or spray and its wire
use is definitely more efficient. Unlike the spray arc
process, pulsing offers controlled heat input that allows
better welding on thin materials, lower wire feed speeds
and leads to less distortion and improved overall quality
and appearance. This is especially important with stain-
less, nickel and other alloys that are sensitive to heat
input.
PULSE WELDING (GMAW-P)
The pulsed-arc process is, by definition, a spray trans-
fer process wherein spray transfer occurs in pulses at
regularly spaced intervals. In the time between pulses,
the welding current is reduced and no metal transfer
occurs.
Pulsed-arc transfer is obtained by operating a power
source between low and high current levels. The high
current level or “pulse” forces an electrode drop to the
workpiece. The low current level or “background” main-
tains the arc between pulses. (See Figure below).
In GMAW-P mode, arc control adjusts the background
current and frequency of the wave. When arc control
goes up, the frequency increases thus increasing the
droplet transfer.
EACH PULSE DELIVERS ONE DROPLET OF WELD MATERIAL
FREQUENCY
SPRAY TRANSITION
CURRENT
V350-PRO
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B-13
B-13
OPERATION
When Arc Control is used in the Pulse on Pulse modes,
it does the same things it does in the other pulsed
modes: decreasing the Arc Control decreases the
droplet transfer and weld deposition rate. Increasing
the Arc Control increases the droplet transfer and weld
deposition rate. Since Arc Control varies weld droplet
transfer rate, the Arc Control can be used to vary the
ripple spacing in the weld bead.
PULSE-ON-PULSE™ (GMAW-PP)
Pulse on Pulse™ is a Lincoln process specifically
designed for use in welding relatively thin (less than
1/4" thick) aluminum (See the table below). It gives
weld beads with very consistent uniform ripple.
In Pulse on Pulse modes, two distinct pulse types are
used, instead of the single pulse type normally used in
GMAW-P. A number of high energy pulses are used to
obtain spray transfer and transfer metal across the arc.
Such pulses are shown in the figure below. After a
number "N" of such pulses, depending on the wire feed
speed used, an identical number "N" of low energy
pulses are performed. These low energy pulses,
shown in the figure below, do not transfer any filler
metal across the arc and help to cool the arc and keep
the heat input low.
BENEFITS OF PULSE ON PULSE FROM
LINCOLN ELECTRIC
• Excellent appearance of the weld bead
• Improved cleaning action
• Reduced porosity
Table B.2 shows WFS and Trim settings for common
aluminum types and wire sizes when welding with
Pulse-on-Pulse. The welds made to obtain the values
in the table were fillet welds in the flat position. The val-
ues in the table can be helpful as a starting point to
establish a welding procedure. From there, adjust-
ments need to be made to set the proper procedure for
each specific application (out-of-position, other types
of joints, etc.).
"N" PULSES
"N" PULSES
HIGH HEAT
PULSES
LOW HEAT
PULSES
PEAK
AMPS
BACKGROUND
AMPS
TIME
The Peak Current, Background Current, and
Frequency are identical for the high energy and low
energy pulses. In addition to cooling the weld down,
the major effect of the low energy pulses is that they
form a weld ripple. Since they occur at very regular
time intervals, the weld bead obtained is very uniform
with a very consistent ripple pattern. In fact, the bead
has its best appearance if no oscillation of the welding
gun ("whipping") is used.(See the figure below)
The comments on the table below show values of WFS
below which it is not recommended to weld. The rea-
son is, that below these values the weld transfer will
change from a spray arc to a short-arc, which is not
advisable when welding aluminum.
WELDING PROCEDURES FOR PULSE-ON-PULSE
MATERIAL
GAS
Aluminum 4043
100% Ar.
E4043
Aluminum 4043
100% Ar.
E4043
Aluminum 5356
100% Ar.
E5356
Aluminum 5356
100% Ar.
E5356
WIRE
WIRE SIZE
0.035
3/64
0.035
3/64
14 ga.
250 / 0
400 / 0
550 / 0
600 / 0
200 / 0
280 / 0
340 / 0
400 / 0
230 / 0
425 / 0
670 / 0
700 / 0
225 / 0
400 / 0
500 / 0
550 / 0
10 ga.
3/16
1/4
Not Recommended
below 200 WFS
Not Recommended
below 100 WFS
Not Recommended
below 200 WFS
Not Recommended
below 200 WFS
COMMENTS
V350-PRO
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B-14
B-14
NOTES
V350-PRO
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C-1
C-1
TABLE OF CONTENTS
- ACCESSORIES SECTION -
Accessories...........................................................................................................................Section C
Cobramatic & Tig Module Connection Instructions...................................................................C-2
Options/Accessories...................................................................................................................C-2
Quick Disconnect Plugs .............................................................................................................C-3
Connection of Lincoln Electric Wire Feeders............................................................C-4 Thru C-11
V350-PRO/LN-25 with Optional 6 Pin K441-1 Remote.......................................................C-4
V350-PRO/LN-25 with Optional 6 Pin K857 Remote ..........................................................C-5
LN-25 with K431 Remote Option.........................................................................................C-6
V350-PRO/LN-25 with K867 Adapter..................................................................................C-7
V350-PRO/LN-7 with K480 Control Cable ..........................................................................C-8
V350-PRO/LN-7 with K867 Adapter....................................................................................C-9
V350-PRO/LN-742 .............................................................................................................C-10
V350-PRO/LN-10 with K1505 Control Cable ....................................................................C-11
V350-PRO
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C-2
C-2
ACCESSORIES
"CE" Version – K1728-3
Cobramatic Connection Instructions
A Cobramatic can only be used with a Factory or
"CE" version of the V350
• The "CE" version is the Factory version with the
addition of power line filtering allowing the machine
to comply with the European and Australian EMC
emission requirements.
1. Turn the Invertec power switch "off"
2. Connect the control cable from the Cobramatic to
the 24/42 VAC 14-pin wire feeder amphenol on
the rear of the Invertec.
Field Installed Options/Accessories
3. Connect the electrode cable to the output terminal
of the polarity required by electrode. Connect the
work lead to the other terminal.
Two versions of the V350-Pro are available from the
factory for both the CE and ROW versions.
Options for K1728-1 Factory and K1728-3 "CE"
V350’s
4. Set the meter polarity switch on the front of the
Invertec to coincide with wire feeder polarity used.
• TIG Gas Control Kit – K1762-2
• Advanced Process Panel – K1763-1
Options for all models of V350-PRO
5. If a remote control such as K857 is to be used
with the Cobramatic, the remote can be connected
directly to the 6pin amphenol on the front of the
Invertec or use a K864 adapter to connect the
cobramatic and the remote to the 24/42VAC 14-
pin wire feeder amphenol connector on the rear of
the Invertec.
• Undercarriage – K1764-1
• Valet Style Undercarriage - K1838-1
Welding Cable Connectors:
• K852-70 1/0-2/0 cable
• K852-95 2/0-3/0 cable
TIG Module K930-2
The TIG Module connects to the V350-Pro Factory or
CE versions with a K936-1 (9-14 pin) control cable.
Connect the K936-1 to the 115VAC Wire Feeder
Amphenol on the rear of the V350-Pro.
FACTORY VERSION and
ADVANCED PROCESS VERSION
The TIG Module can also be used with the V350
Construction version. A K936-4 control cable is
required to supply 115VAC to the TIG Module from an
external 115VAC supply.
K857
K814
K812
K870
Remote Output Control
Arc Start Switch
Hand Operated Amptrol
Foot Operated Amptrol
General Instructions for Connection of Wire
Feeders to V350-Pro
Note: All of the above remote controls connect directly
to the 6-pin MS-style connector, with either a K864 or
K876 adapter and connect it to the 14 pin wire feeder
MS-style connector. (See Diagram in Section F-1)
Wire feeders other than LN-7 and LN-25 may be used
provided that the auxiliary power supply capacity of
the V350-Pro is not exceeded. K867 universal
adapter plug is required. See connection diagram
S19406 and S19386 at the back of this manual for
more information.
K930-[ ]
TIG Module
LN-25 *
K428, K446, K449
K617 (-1 or -2) K618 (-1 or -2)
K440 (-1), K567-1
K1559-1, K1564-1
K1499-1, K1521-1
K1587-1
LN-742
LN-7 GMA
LN-10
DH-10
Remote Control of Invertec
Remote Control K857, Hand Amptrol K963 and Foot
Amptrol K870.
Cobramatic
*Not recommended for pulse welding
OPTIONS / ACCESSORIES
Construction Version – K1728-2
• All welding modes for this model run with local out-
put control and weld terminals ON (e.g. Stick, TIG,
LN25 off the arc).
K930-1
TIG Module
K428,K446, K449
LN-25(Off the Arc)
V350-PRO
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C-3
C-3
ACCESSORIES
QUICK DISCONNECT PLUGS
A quick disconnect system is used for the welding
cable connections. The K852-70 is designed to
accept a welding cable size of 1/0 to 2/0.
1. Remove 25mm (1 in.) of welding cable insulation.
2. Slide rubber boot onto cable end. The boot end
may be trimmed to match the cable diameter.
Soap or other lubricant will help to slide the boot
over the cable.
BOOT
WELDING CABLE
25 mm
TRIM
1 in.
3. Slide the copper tube into the brass plug.
4. Insert cable into copper tube.
SET SCREW
BRASS PLUG
COPPER TUBE
5. Tighten set screw to collapse copper tube. Screw
must apply pressure against welding cable. The
top of the set screw will be well below the surface
of the brass plug after tightening.
6. Slide rubber boot over brass plug. The rubber
boot must be positioned to completely cover all
electrical surfaces after the plug is locked into the
receptacle.
V350-PRO
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C-4
C-4
ACCESSORIES
CONNECTION OF LINCOLN ELEC-
TRIC WIRE FEEDERS
4. Set the voltmeter switch to the electrode polarity
chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Set “WELD TERMINALS SELECT” to the “ON”
CAUTION
CONNECTION OF THE LN-25 TO THE
V350-PRO “ACROSS THE ARC” WITH
OPTIONAL 6 PIN K441-1 REMOTE CON-
TROL.
1. Remove input power to the V350-PRO.
position.
2. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal. Welding cable
must be sized for current and duty cycle of the
application.
If you are using an LN-25 without an internal con-
tactor, the electrode will be “HOT” when the V350-
PRO is energized.
8. Set the “ARC CONTROL” to the “O” position and
then adjust to suit.
3. Attach the single lead from the LN-25 control box
to the work using the spring clip on the end of the
lead. This is only a control lead - it carries no
welding current.
Figure C.1 V350-PRO/LN-25 ACROSS THE ARC CONNECTION DIAGRAM
6 pin
Amphenol
Optional K444-1
Remote Control
LN-25
Wire Feeder
+
-
Work Clip Lead
To Work
To Work
Electrode Cable
NOTE: Illustration shows electrode connected for negative polarity.
V350-PRO
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C-5
C-5
ACCESSORIES
5. Set the voltmeter switch to the electrode polarity
chosen.
CONNECTION OF THE LN-25 TO THE
V350-PRO “ACROSS THE ARC” WITH
OPTIONAL 6 PIN K857 REMOTE CON-
TROL.
6. Set “CONTROL SELECT” to “REMOTE”.
7. Set the “MODE” to the “CV-WIRE” position.
1. Remove input power to the V350-PRO.
8. Set “WELD TERMINALS SELECT” to the “ON”
position.
2. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal. Welding cable
must be sized for current and duty cycle of the
application.
CAUTION
If you are using an LN-25 without an internal con-
tactor, the electrode will be “HOT” when the V350-
PRO is energized.
3. Connect the K857 remote control to the 6-pin
amphenol on the V350-PRO.
4. Attach the single lead from the LN-25 control box
to the work using the spring clip on the end of the
lead. This is only a control lead - it carries no
welding current.
9. Set the “ARC CONTROL” to the “O” position and
then adjust to suit.
Figure C.2 V350-PRO/LN-25 ACROSS THE ARC CONNECTION DIAGRAM WITH K857
REMOTE CONTROL
K857
Remote Control
6 pin
Amphenol
LN-25
Wire Feeder
+
-
Work Clip Lead
To Work
To Work
Electrode Cable
NOTE: Illustration shows electrode connected for negative polarity.
V350-PRO
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C-6
C-6
ACCESSORIES
6. Set the “MODE” to the “CV-WIRE” position.
CONNECTION OF THE LN-25 WITH K431
REMOTE OPTION TO THE V350-PRO.
NOTE: AN LN-25 CAN ONLY BE USED WITH A FAC-
TORY OR “CE” VERSION OF THE V350-PRO.
7. Set “WELD TERMINALS SELECT” to the
“REMOTE” position.
8. Set the “ARC CONTROL” to the “O” position and
then adjust to suit.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal. Welding cable
must be sized for current and duty cycle of the
application.
9. Connect the K432 remote control cable to the LN-
25.
10. Connect the K876 adapter to the K432 and to the
24/42VAC 14-pin amphenol located at the rear of
the V350-PRO.
3. Attach the single lead from the LN-25 control box
to the work using the spring clip on the end of the
lead. This is only a control lead - it carries no
welding current.
11. Adjust the wire feed speed and voltage at the LN-
25.
NOTE: See Figure C.4 for connection Using K867
adapter.
4. Set the voltmeter switch to the electrode polarity
chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
Figure C.3 LN-25 with K431 Remote Option to the V350-PRO
ELECTRODE CABLE
TO LN-25
LN-25 WITH
K431 OPTION
6 PIN AMPHENOL
14 PIN (24/42VAC)
AMPHENOL
TO
WORK
-
K876 ADAPTER
K432 REMOTE
CONTROL CABLE
+
INVERTEC
POWER SOURCE
NOTE: Illustration shows electrode connected for positive polarity.
V350-PRO
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C-7
C-7
ACCESSORIES
CONNECTION OF THE K867 ADAPTER
FOR USE WITH LN-25 WITH K431
OPTION/V350-PRO.
1. Insulate each unused lead individually.
2. Remove 6 pin plug from K432 cable in order to
connect K867 adapter.
3. Label each lead (A thru F) as they are removed
from the 6 pin plug.
4. Splice leads and insulate.
Figure C.4 Connection of LN-25 to V350-PRO using K867 adapter.
21
82
81
42
41
GND
31
32
2
4
SPARE
75
76
77
ELECTRODE CABLE
TO LN-25
1
LN-25 WITH
K431 OPTION
14 PIN
(24/42VAC)
AMPHENOL
TO
WORK
E
F
D
A
B
C
-
K432 REMOTE
CONTROL CABLE
+
K867 ADAPTER
INVERTEC
POWER SOURCE
4
V350-PRO
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C-8
C-8
ACCESSORIES
3. Connect the input cable from the K480 control
cable to the (115VAC) 14 pin amphenol on the
V350-PRO and the input cable plug on the LN-7.
CONNECTION OF THE LN-7 TO THE V350-
PRO USING K480 CONTROL CABLE (SEE
FIGURE C.5)
NOTE: AN LN-7 CAN ONLY BE USED WITH A FAC-
TORY OR “CE” VERSION OF THE V350-PRO. IF
YOUR LN-7 COMES EQUIPPED WITH A K291 OR
K404 INPUT CABLE, REFER TO THE CONNECTION
OF THE LN-7 USING K867 UNIVERSAL ADAPTER.
4. Set the “VOLTMETER” switch to “+” or “-”
depending on the polarity chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
1. Remove input power to the V350-PRO.
7. Place the “WELD TERMINALS SELECT” in the
“REMOTE” position.
2. Connect the electrode cable from the K480 control
cable to the “+” terminal of the welder and to the
LN-7 wire feeder. Connect the work cable to the
“-” terminal of the welder.
8. Adjust wire feed speed at the LN-7 and adjust the
welding voltage with the optional remote control if
used.
NOTE: Figure C.5 shows the electrode connected
for positive polarity. To change polarity, shut the
welder off and reverse the electrode and work
cables at the output terminals.
9. Set the “ARC” control at “0” initially and adjust to
suit.
NOTE: Welding cable must be sized for current
and duty cycle of application.
Figure C.5 V350-PRO/LN-7 with K480 Control Cable Connection Diagram
TO LN-7 INPUT
14 PIN
AMPHENOL
(115VAC)
AT REAR OF
MACHINE
CABLE PLUG
OPTIONAL K857
REMOTE CONTROL
-
+
K480 CONTROL CABLE
6 PIN
AMPHENOL
ELECTRODE CABLE
TO WIRE FEED UNIT
TO WORK
V350-PRO
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C-9
C-9
ACCESSORIES
CONNECTION OF THE K867 ADAPTER
FOR USE WITH THE K291 OR K404 INPUT
CABLES AND LN-7.
1. Insulate each unused lead individually.
2. Splice leads and insulate.
Figure C.6 Connection of LN-7 to V350-PRO using K867 adapter.
SPARE
82
81
42
41
LN-7
CONTROL
BOX
ELECTRODE CABLE
TO LN-7
1
14 PIN(115VAC)
AMPHENOL
TO
WORK
31
32
2
31
32
2
-
4
4
21
GND
21
GND
K291 OR K404
INPUT CABLE
+
K867 UNIVERSAL
ADAPTER PLUG
GREEN
INVERTEC
POWER SOURCE
75
76
77
75
76
77
K775 OPTIONAL
REMOTE CONTROL
2
V350-PRO
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C-10
C-10
ACCESSORIES
3. Connect the K591 control cable to the 24/42VAC
14 pin amphenol on the back of the V350-PRO
and the input cable plug on the LN-742.
CONNECTION OF THE LN-742 TO THE
V350-PRO (SEE FIGURE C.7)
NOTE: AN LN-7 CAN ONLY BE USED WITH A FAC-
TORY OR “CE” VERSION OF THE V350-PRO.
4. Set the “VOLTMETER” switch to “+” or “-”
depending on the polarity chosen.
1. Remove input power to the V350-PRO.
5. Set the “MODE” to the “CV-WIRE” position..
6. Set “CONTROL SELECT” to “LOCAL”.
2. Connect the electrode cable from the LN-742 to
the “+” terminal of the welder. Connect the work
cable to the “-” terminal of the welder.
7. Place the “WELD TERMINALS SELECT” in the
“REMOTE” position.
NOTE: Figure C.7 shows the electrode connected
for positive polarity. To change polarity, shut the
welder off and reverse the electrode and work
cables at the output terminals.
8. Adjust wire feed speed at the LN-742.
9. Set the “ARC” control at “0” initially and adjust to
suit.
NOTE: Welding cable must be sized for current
and duty cycle of application.
Figure C.7 V350-PRO/LN-742 Connection Diagram
TO LN-742 INPUT
CABLE PLUG
14 PIN
AMPHENOL
(24/42VAC)
AT REAR OF
MACHINE
+
-
K591 CONTROL CABLE
ELECTRODE CABLE
TO WIRE FEED UNIT
TO WORK
V350-PRO
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C-11
C-11
ACCESSORIES
CONNECTION OF THE LN-10 TO THE
V350-PRO USING THE K1505 CONTROL
CABLE.
8. Set the “ARC CONTROL” to the “0” position and
then adjust to suit.
NOTE: AN LN-10 CAN ONLY BE USED WITH A FAC-
TORY OR “CE” VERSION OF THE V350-PRO.
9. Set wire feed speed and voltage at the LN-10.
NOTE: The voltage set point displayed on the
V350-PRO should be ignored when operating in
the remote control mode with the LN-10.
1. Remove input power to the V350-PRO.
2. Connect the K1505 control cable from the LN-10
to the Invertec 24/42VAC 14 pin amphenol con-
necter on the rear of the V350-PRO.
10. See the LN-10 manual for details on accessing
the control DIP switch.
11. The control DIP switch inside the LN-10 should be
set per the instructions in the LN-10 manual.
3. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal.
4. Set the meter polarity switch on the front of the
V350-PRO to coincide with wire feeder polarity
used.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position..
7. Set the “WELD TERMINALS SELECT” to the
“REMOTE” position.
Figure C.8 LN-10 V350-PRO
TO LN-10
14 PIN
AMPHENOL
(24/42VAC)
AT REAR OF
MACHINE
+
-
K1505
TO WORK
ELECTRODE CABLE
TO LN-10
V350-PRO
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C-12
C-12
NOTES
V350-PRO
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Section D-1
Section D-1
TABLE OF CONTENTS
-MAINTENANCE-
Maintenance .........................................................................................................................Section D
Capacitor Discharge Procedure .................................................................................................D-2
Visual Inspection.........................................................................................................................D-2
Routine Maintenance..................................................................................................................D-2
Periodic Maintenance.................................................................................................................D-2
Major Component Locations .....................................................................................................D-3
V350-PRO
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D-2
D-2
MAINTENANCE
VISUAL INSPECTION
WARNING
Clean interior of machine with a low pressure air
stream. Make a thorough inspection of all compo-
nents. Look for signs of overheating, broken leads or
other obvious problems. Many problems can be
uncovered with a good visual inspection.
Have qualified personnel do the maintenance
work. Always use the greatest care when
working near moving parts.
Do not put your hands near the cooling blower
fan. If a problem cannot be corrected by
following the instructions, take the machine to
the nearest Lincoln Field Service Shop.
ROUTINE MAINTENANCE
1. Every 6 months or so the machine should be
cleaned with a low pressure airstream. Keeping
the machine clean will result in cooler operation
and higher reliability. Be sure to clean these
areas:
-----------------------------------------------------------------------
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and
ground
• All printed circuit boards
• Power switch
• Main transformer
• Always wear dry insulating gloves.
------------------------------------------------------------------------
EXPLODING PARTS can cause
• Input rectifier
• Auxiliary Transformer
• Reconnect Switch Area
• Fan (Blow air through the rear louvers)
injury.
•
Failed parts can explode or cause other
parts to explode when power is applied.
2. Examine the sheet metal case for dents or breakage.
Repair the case as required. Keep the case in good
condition to insure that high voltage parts are protected
and correct spacings are maintained. All external sheet
metal screws must be in place to insure case strength
and electrical ground continuity.
•
Always wear a face shield and long
sleeves when servicing.
------------------------------------------------------------------------
See additional warning information
throughout this Operator’s Manual.
------------------------------------------------------------------------
PERIODIC MAINTENANCE
Overload Protection
CAPACITOR DISCHARGE PROCEDURE
The machine is electrically protected from producing
high output currents. Should the output current
exceed 430A, an electronic protection circuit will
reduce the current to approximately 100A. The
machine will continue to produce this low current until
the protection circuit is reset. Reset occurs when the
output load is removed.
1. Obtain a power resistor (25 ohms, 25 watts).
2. Hold resistor body with electrically insulated glove.
DO NOT TOUCH TERMINALS. Connect the resis-
tor terminals across the two studs in the position
shown. Hold in each position for 1 second.
Repeat for all four capacitors.
RESISTOR
Thermal Protection
Thermostats protect the machine from excessive
operating temperatures. Excessive temperatures may
be caused by a lack of cooling air or operating the
machine beyond the duty cycle and output rating. If
excessive operating temperature should occur, the
thermostat will prevent output voltage or current. The
meter will remain energized during this time.
CAPACITOR
TERMINALS
Thermostats are self-resetting once the machine
cools sufficiently. If the thermostat shutdown was
caused by excessive output or duty cycle and the fan
is operating normally, the Power Switch may be left
on and the reset should occur within a 15 minute peri-
od.
3. Use a DC voltmeter to check that voltage is not
present across the terminals on all four capaci-
tors.
V350-PRO
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D-3
D-3
MAINTENANCE
FIGURE D.1 – MAJOR COMPONENT LOCATIONS
1. Center Panel
2. Base Assembly
3. Case Back
4. Case Front
5. Case Wraparound
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V350-PRO
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D-4
D-4
NOTES
V350-PRO
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Section E-1
Section E-1
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
Theory of Operation .............................................................................................................Section E
General Description ....................................................................................................................E-2
Input Line Voltage, Auxiliary Transformer and Precharge...........................................................E-2
Switch Board and Main Transformer ..........................................................................................E-3
Power board, Control Board, and SPI Communications............................................................E-4
Output Rectifier and Choke........................................................................................................E-5
Thermal Protection .....................................................................................................................E-6
Protection Circuits ......................................................................................................................E-6
Over current Protection ........................................................................................................E-6
Under/Over Voltage Protection ............................................................................................E-6
Insulated Gate Bipolar Transistor (IGBT) Operation ...................................................................E-7
Pulse Width Modulation..............................................................................................................E-8
Minimum/Maximum Output..................................................................................................E-8
FIGURE E.1 – V350-PRO BLOCK LOGIC DIAGRAM
To Control
Board
Main Switch Board
Positive
Output
Terminal
Input
Rectifier
Primary
Current
Sensor
Input switch
Choke
Negative
Output
Terminal
Reconnect
Switch
Primary
Current
Sensor
Fan
Primary Current Feedback
Input Relay Control
115VAC Fan Supply
Soft Start Control
V/F Capacitor Feedback (2)
Auxiliary
Transformer
115VAC, 42VAC
24VAC
Machine Control Supply
+15VDC, -15VDC, +5VDC
SPI Supply +15VDC +5VDC
RS232 Supply +5VDC
Power
Board
Control Board
28VAC
40VDC
14 Pin
RS232
Amphenol
SPI Communications & +15VDC, +5VDC Supply
Advanced
Process
Panel
Mode
Panel
Remote Control & Trigger
Remote
Board
Display
Panel
(Not used if APP
is in place)
6 Pin
Amphenol
Output
Control
Weld
Terminals
Optional Solenoid
Output
Potentiometer
V350-PRO
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E-2
E-2
THEORY OF OPERATION
FIGURE E.2 – INPUT VOLTAGE AND PRECHARGE
Main Switch Board
To Control
Board
Positive
Output
Terminal
Input
Rectifier
Primary
Current
Sensor
Input switch
Choke
Negative
Output
Terminal
Reconnect
Switch
Primary
Current
Sensor
Fan
Primary Current Feedback
115VAC Fan Supply
Input Relay Control
Soft Start Control
V/F Capacitor Feedback (2)
Auxiliary
Transformer
115VAC, 42VAC
24VAC
Machine Control Supply
+15VDC, -15VDC, +5VDC
Power
Board
SPI Supply +15VDC +5VDC
RS232 Supply +5VDC
Control Board
28VAC
40VDC
14 Pin
Amphenol
RS232
SPI Communications & +15VDC, +5VDC Supply
Advanced
Process
Panel
Mode
Panel
Remote Control & Trigger
Remote
Board
Display
Panel
(Not used if APP
is in place)
6 Pin
Amphenol
Output
Control
Output
Potentiometer
Weld
Terminals
Optional Solenoid
is rectified and the resultant 40VDC is applied to the
power board.
GENERAL DESCRIPTION
The Invertec V350-Pro is an inverter based welding
power source that offers multi mode constant voltage
(CV) and constant current (CC) welding and is rated at
350 amps 34VDC at a 60% duty cycle. The Invertec
V350-Pro is available in a construction version (no wire
feeder connection or auxiliary power ), a factory ver-
sion that includes a wire feeder connection and relat-
ed power, an advanced process version and a rack
version.
The input voltage is rectified by the input rectifier and
the resultant DC voltage is applied to the switch board
through the reconnect switch assembly located at the
rear of the machine. The reconnect switch connect the
two pairs of input capacitors either in a parallel (lower
voltage) or series (higher voltage) configuration to
accommodate the applied input voltage.
During the precharge time the DC input voltage is
applied to the input capacitors through a current limit-
ing circuit. The input capacitors are charged slowly
and current limited. A voltage to frequency converter
circuit located on the switch board monitors the
capacitor voltages. This signal is coupled to the con-
trol board (measure frequency, not voltage to check
signal). When the input capacitors have charged to an
acceptable level, the control board energizes the input
relays, that are located on the switch board, making all
of the input power, without current limiting, available
to the input capacitors. If the capacitors become
under or over voltage the control board will de-ener-
gize the input relays and the V350 output will be dis-
abled. Other possible faults may also cause the input
relays to drop out.
INPUT LINE VOLTAGE, AUXILIARY
TRANSFORMER, & PRECHARGE
The Invertec V350-Pro can be connected for a variety
of three-phase or single-phase input voltages. The ini-
tial power is applied to the V350 through a line switch
located on the front of the machine. Two phases of the
input voltage are applied to the auxiliary transformer.
The auxiliary transformer develops four different sec-
ondary voltages. The 115VAC is used to power the fan
motor and also is applied to the 14 pin amphenol type
connector for wirefeeder operation. The 24VAC and
42VAC voltages are also applied to the 14 pin amphe-
nol type connector to power wirefeeders. The 28VAC
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
V350-PRO
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E-3
E-3
THEORY OF OPERATION
FIGURE E.3 – SWITCH BOARD & MAIN TRANSFORMER
Main Switch Board
Board
Positive
Output
Terminal
Input
Rectifier
Primary
Current
Sensor
Input switch
Choke
Negative
Output
Terminal
Reconnect
Switch
Primary
Current
Sensor
Fan
Primary Current Feedback
Input Relay Control
115VAC Fan Supply
Soft Start Control
V/F Capacitor Feedback (2)
Auxiliary
Transformer
115VAC, 42VAC
24VAC
Machine Control Supply
+15VDC, -15VDC, +5VDC
Power
Board
SPI Supply +15VDC +5VDC
RS232 Supply +5VDC
Control Board
28VAC
40VDC
14 Pin
Amphenol
RS232
SPI Communications & +15VDC, +5VDC Supply
Advanced
Process
Panel
Mode
Panel
(Not used if APP
is in place)
Remote Control & Trigger
Remote
Board
Display
Panel
6 Pin
Amphenol
Output
Control
Output
Potentiometer
Weld
Terminals
Optional Solenoid
main transformer. The reverse directions of current
flow through the main transformer primaries and the
offset timing of the IGBT switching circuits induce an
AC square wave output signal at the secondary of the
main transformer. The two current transformers (CT)
located on the switch board monitor these primary
currents. If the primary currents become abnormally
high the control board will shut off the IGBTs, thus dis-
abling the machine output. The DC current flow
through each primary winding is clamped back to
each respective input capacitor when the IGBTs are
turned off. This is needed due to the inductance of the
transformer primary winding. The firing of the two
switch boards occurs during halves of a 50 microsec-
ond interval, creating a constant 20 KHZ output. In
some low open circuit Tig modes the firing frequency
is reduced to 5KHZ.
SWITCH BOARD &
MAIN TRANSFORMER
There is one switch board in the Invertec V350-Pro.
This board incorporates two pairs of input capacitors,
two insulated gate bipolar transistor (IGBT) switching
circuits, a fan motor drive circuit, and a voltage/fre-
quency capacitor feedback circuit. The two capaci-
tors in a pair are always in series with each other.
When the reconnect switch is in the lower voltage
position the capacitor pairs are in parallel . Thus two
series capacitors in parallel with two series capacitors.
When the reconnect switch is in the high voltage posi-
tion the two capacitor pairs are in series. Thus four
capacitors in series. This is required to accommodate
the higher input voltages.
When the input capacitors are fully charged they act
as power supplies for the IGBT switching circuits.
When welding output is required the Insulated Gate
Bipolar Transistors switch the DC power from the input
capacitors, "on and off" thus supplying a pulsed DC
current to the main transformer primary windings. See
IGBT Operation Discussion and Diagrams in this
section. Each IGBT switching circuit feeds current to
a separate, oppositely wound primary winding in the
The Invertec V350-Pro has a F.A.N. fan as needed cir-
cuit. The fan operates when the welding output ter-
minals are energized or when a thermal over tempera-
ture condition exists. Once the fan is activated it will
remain on for a minimum of five minutes. The fan dri-
ver circuit is housed on the switch board but it is acti-
vated from a control board signal.
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
V350-PRO
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E-4
E-4
THEORY OF OPERATION
FIGURE E.4 – POWER BOARD, CONTROL BOARD
AND SERIAL PERIPHERAL INTERFACE (SPI) COMMUNICATIONS
To Control
Main Switch Board
Board
Positive
Output
Terminal
Input
Rectifier
Primary
Current
Sensor
Input switch
Choke
Negative
Output
Terminal
Reconnect
Switch
Primary
Current
Sensor
Fan
Primary Current Feedback
Input Relay Control
115VAC Fan Supply
Soft Start Control
V/F Capacitor Feedback (2)
Auxiliary
Transformer
115VAC, 42VAC
24VAC
Machine Control Supply
+15VDC, -15VDC, +5VDC
Power
Board
SPI Supply +15VDC +5VDC
RS232 Supply +5VDC
Control Board
28VAC
40VDC
14 Pin
Amphenol
RS232
SPI Communications & +15VDC, +5VDC Supply
Advanced
Process
Panel
Mode
Panel
Remote Control & Trigger
Remote
Board
Display
Panel
(Not used if APP
is in place)
6 Pin
Amphenol
Output
Control
Output
Potentiometer
Weld
Terminals
Optional Solenoid
the V350 machine. The control board sends and
receives command signals from the mode or advanced
process panel, the display panel and the remote panel.
These communications are processed through a digi-
tal network called a Serial Peripheral Interface (SPI).
This network digitally communicates to and from the
control board the user’s commands and various
machine status messages. The software that is con-
tained within the control board processes and com-
pares these commands with the voltage and current
feedback information it receives from the output cur-
rent sensor and the output voltage sensing leads. The
appropriate pulse width modulation (PWM) signals
(See Pulse Width Modulation in this section) are sent
to the switch board IGBTs. In this manner, the digital-
ly controlled high-speed welding waveform is created
and regulated.
POWER BOARD, CONTROL BOARD
AND SERIAL PERIPHERAL INTER-
FACE (SPI) COMMUNICATIONS
POWER BOARD
The 28VAC auxiliary is rectified and filtered and applied
to the power board. The power board, utilizing a
switching power supply, processes the 40VDC input
and develops several regulated positive and negative
DC supplies. Three DC supplies are fed to the control
board for machine control supplies. Two positive DC
voltages are coupled to the control board for the Serial
Peripheral Communications (SPI) supplies. A +5VDC
is used for the RS232 connection supply. An over or
under input voltage detection and shutdown circuit is
also part of the power board’s circuitry. The optional
12VDC gas solenoid is powered by the remote board.
The control board also monitors the thermostats, the
main transformer primary currents and the input
capacitor voltages.
CONTROL BOARD
The control board performs the primary interfacing
functions to establish and maintain output control of
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
V350-PRO
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E-5
E-5
THEORY OF OPERATION
FIGURE E.5 – OUTPUT RECTIFIER AND CHOKE
To Control
Board
Main Switch Board
Positive
Output
Terminal
Input
Rectifier
Primary
Current
Sensor
Input switch
Choke
Negative
Output
Terminal
Reconnect
Switch
Primary
Current
Sensor
Fan
Primary Current Feedback
115VAC Fan Supply
Input Relay Control
Soft Start Control
V/F Capacitor Feedback (2)
Auxiliary
Transformer
115VAC, 42VAC
24VAC
Machine Control Supply
+15VDC, -15VDC, +5VDC
Power
Board
SPI Supply +15VDC +5VDC
RS232 Supply +5VDC
Control Board
28VAC
40VDC
14 Pin
Amphenol
RS232
SPI Communications & +15VDC, +5VDC Supply
Advanced
Process
Panel
Mode
Panel
Remote Control & Trigger
Remote
Board
Display
Panel
(Not used if APP
is in place)
6 Pin
Amphenol
Output
Control
Output
Potentiometer
Weld
Terminals
Optional Solenoid
OUTPUT RECTIFIER AND CHOKE
The output rectifier receives the AC output from the
main transformer secondary and rectifies it to a DC
voltage level. Since the output choke is in series with
the negative leg of the output rectifier and also in
series with the welding load, a filtered DC output is
applied to the machine’s output terminals.
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
V350-PRO
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E-6
E-6
THEORY OF OPERATION
OVER CURRENT
PROTECTION
THERMAL PROTECTION
Two normally closed (NC) thermostats protect the
machine from excessive operating temperatures.
These thermostats are wired in series and are con-
nected to the control board. One of the thermostats is
located on the heat sink of the switch board and the
other is located on the output choke. Excessive tem-
peratures may be caused by a lack of cooling air or
operating the machine beyond its duty cycle or output
rating. If excessive operating temperatures should
occur, the thermostats will prevent output from the
machine. The yellow thermal light, located on the front
of the machine, will be illuminated. The thermostats
are self-resetting once the machine cools sufficiently.
If the thermostat shutdown was caused by excessive
output or duty cycle and the fan is operating normally,
the power switch may be left on and the reset should
occur within a 15-minute period.
If the average current exceeds 450 amps for one sec-
ond, then the output will be limited to 100 amps until
the load is removed. If the peak current exceeds 600
amps for 150 ms, the output will be limited to 100
amps until the load is removed.
UNDER/OVER VOLTAGE PROTECTION
Protective circuits are included on the switch and con-
trol boards to monitor the voltage across the input
capacitors. In the event that a capacitor pair voltage
is too high, or too low, the machine output will be dis-
abled. The protection circuits will prevent output if any
of the following conditions exist.
1. Voltage across a capacitor pair exceeds 467
volts. (High line surges or improper input voltage
connections.)
PROTECTIVE CIRCUITS
Protective circuits are designed into the V350-PRO to
sense trouble and shut down the machine before
damage occurs to the machine's internal components.
2. Voltage across a capacitor pair is under 190 volts.
(Due to improper input voltage connections.)
3. Internal component damage.
V350-PRO
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E-7
E-7
THEORY OF OPERATION
capable of conducting current. A voltage supply con-
nected to the drain terminal will allow the IGBT to con-
duct and supply current to the circuit components
coupled to the source. Current will flow through the
conducting IGBT to downstream components as long
as the positive gate signal is present. This is similar to
turning ON a light switch.
INSULATED GATE BIPOLAR
TRANSISTOR (IGBT)
OPERATION
An IGBT is a type of transistor. IGBT are semiconduc-
tors well suited for high frequency switching and high
current applications.
Example A in Figure E.6 shows an IGBT in passive
mode. There is no gate signal, zero volts relative to the
source, and therefore, no current flow. The drain ter-
minal of the IGBT may be connected to a voltage sup-
ply; but since there is no conduction, the circuit will not
supply current to components connected to the
source. The circuit is turned OFF like a light switch.
Example B shows the IGBT in an active mode. When
the gate signal , a positive DC voltage relative to the
source, is applied to the gate terminal of the IGBT, it is
FIGURE E.6 – IGBT
POSITIVE
VOLTAGE
APPLIED
GATE
GATE
SOURCE
SOURCE
n +
n +
n +
n +
p
BODY REGION
p
BODY REGION
DRAIN DRIFT REGION
DRAIN DRIFT REGION
n -
n -
n +
p +
BUFFER LAYER
n +
p +
BUFFER LAYER
INJECTING LAYER
INJECTING LAYER
DRAIN
DRAIN
B. ACTIVE
A. PASSIVE
V350-PRO
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E-8
E-8
THEORY OF OPERATION
FIGURE E.7 — TYPICAL IGBT OUTPUTS.
sec
48
sec
sec
sec
50
MINIMUM OUTPUT
sec
24
sec
sec
24
2
sec
50
MAXIMUM OUTPUT
MAXIMUM OUTPUT
PULSE WIDTH
MODULATION
By holding the gate signal on for 24 microseconds
each, and allowing only two microseconds of dwell
time (off time) during the 50-microsecond cycle, the
output is maximized. The darkened area under the top
curve can be compared to the area under the bottom
curve. The more dark area that is under the curve indi-
cates that more power is present.
The term Pulse Width Modulation is used to describe
how much time is devoted to conduction in the posi-
tive and negative portions of the cycle. Changing the
pulse width is known as modulation. Pulse Width
Modulation (PWM) is the varying of the pulse width
over the allowed range of a cycle to affect the output
of the machine.
1
An IGBT group consists of two IGBT
modules feeding one transformer primary
winding.
MINIMUM OUTPUT
By controlling the duration of the gate signal, the IGBT
is turned on and off for different durations during the
cycle. The top drawing in Figure E.7 shows the mini-
mum output signal possible over a 50-microsecond
time period.
The positive portion of the signal represents one IGBT
1
group conducting for one microsecond. The negative
1
portion is the other IGBT group . The dwell time (off
time) is 48 microseconds (both IGBT groups off). Since
only two microseconds of the 50-microsecond time
period is devoted to conducting, the output power is
minimized.
V350-PRO
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Section F-1
Section F-1
TABLE OF CONTENTS
TROUBLESHOOTING & REPAIR SECTION
Troubleshooting & Repair Section.................................................................................Section F
How to Use Troubleshooting Guide ....................................................................................F-2
PC Board Troubleshooting Procedures and Replacement .................................................F-3
Troubleshooting Guide ........................................................................................................F-4
Test Procedures
Input Filter Capacitor Discharge Procedure .................................................................F-15
Main Switch Board Test ................................................................................................F-17
Input Rectifier Test ........................................................................................................F-21
Power Board Test..........................................................................................................F-25
Output Diode Modules Test ..........................................................................................F-29
Auxiliary Transformer Test .............................................................................................F-33
Current Transducer Test................................................................................................F-37
Fan Control and Motor Test ..........................................................................................F-41
SPI Cable Resistance and Voltage Test........................................................................F-45
Voltage and Current Calibration Procedure ..................................................................F-47
Replacement Procedures
Control Board Removal and Replacement ...................................................................F-51
Display Board Removal and Replacement ...................................................................F-55
Main Switch Board Removal and Replacement ...........................................................F-59
Advanced Process Panel Removal and Replacement .................................................F-63
Remote Board Removal and Replacement ..................................................................F-69
Snubber Board Removal and Replacement .................................................................F-73
Power Board Removal and Replacement.....................................................................F-75
Input Rectifier Removal and Replacement ...................................................................F-79
Output Rectifier Modules Removal and Replacement .................................................F-83
Current Transducer Removal and Replacement...........................................................F-87
Retest after Repair ........................................................................................................F-92
V350-PRO
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F-2
F-2
TROUBLESHOOTING & REPAIR
HOW TO USE TROUBLESHOOTING GUIDE
CAUTION
Service and repair should be performed by only Lincoln Electric Factory Trained Personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician and machine
operator and will invalidate your factory warranty. For your safety and to avoid Electrical Shock, please
observe all safety notes and precautions detailed throughout this manual.
This Troubleshooting Guide is provided to help
you locate and repair possible machine
malfunctions. Simply follow the three-step
procedure listed below.
Step 3. PERFORM COMPONENT TESTS. The
last column, labeled “Recommended Course of
Action” lists the most likely components that may
have failed in your machine. It also specifies the
appropriate test procedure to verify that the
subject component is either good or bad. If there
are a number of possible components, check the
components in the order listed to eliminate one
possibility at a time until you locate the cause of
your problem.
Step 1. LOCATE PROBLEM (SYMPTOM). Look
under the column labeled “PROBLEM
(SYMPTOMS)”. This column describes possible
symptoms that the machine may exhibit. Find
the listing that best describes the symptom that
the machine is exhibiting. Symptoms are
grouped into three main categories: Output
Problems, Function Problems, and LED Function
Problems.
All of the referenced test procedures referred to in
the Troubleshooting Guide are described in detail
at the end of this chapter. Refer to the
Troubleshooting and Repair Table of Contents to
locate each specific Test Procedure. All of the
referred to test points, components, terminal
strips, etc., can be found on the referenced
electrical wiring diagrams and schematics. Refer
to the Electrical Diagrams Section Table of
Contents to locate the appropriate diagram.
Step 2. PERFORM EXTERNAL TESTS. The
second column, labeled “POSSIBLE AREAS OF
MISADJUSTMENT(S)”, lists the obvious external
possibilities that may contribute to the machine
symptom. Perform these tests/checks in the
order listed. In general, these tests can be
conducted without removing the case
wrap-around cover.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs
safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before
you proceed. Call 1-800-833-9353.(WELD)
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F-3
F-3
TROUBLESHOOTING & REPAIR
PC BOARD TROUBLESHOOTING PROCEDURES
- Remove the PC board from the static-shielding bag
and place it directly into the equipment. Don’t set the
PC board on or near paper, plastic or cloth which
could have a static charge. If the PC board can’t be
installed immediately, put it back in the static-shield-
ing bag.
WARNING
ELECTRIC SHOCK
can kill.
•
Have an electrician install and
service this equipment. Turn the
input power OFF at the fuse box
before working on equipment. Do
not touch electrically hot parts.
- If the PC board uses protective shorting jumpers,
don’t remove them until installation is complete.
- If you return a PC board to The Lincoln Electric
Company for credit, it must be in the static-shielding
bag. This will prevent further damage and allow prop-
er failure analysis.
CAUTION
Sometimes machine failures appear to be due to PC
board failures. These problems can sometimes be
traced to poor electrical connections. To avoid prob-
lems when troubleshooting and replacing PC boards,
please use the following procedure:
4. Test the machine to determine if the failure
symptom has been corrected by the
replacement PC board.
NOTE: It is desirable to have a spare (known good)
PC board available for PC board troubleshooting.
1. Determine to the best of your technical ability
that the PC board is the most likely component
causing the failure symptom.
NOTE: Allow the machine to heat up so that all
electrical components can reach their operating
temperature.
2. Check for loose connections at the PC board to
assure that the PC board is properly connected.
5. Remove the replacement PC board and
substitute it with the original PC board to
recreate the original problem.
3. If the problem persists, replace the suspect PC
board using standard practices to avoid static
electrical damage and electrical shock. Read
the warning inside the static resistant bag and
perform the following procedures:
a. If the original problem does not reappear by
substituting the original board, then the PC
board was not the problem. Continue to look
for bad connections in the control wiring
harness, junction blocks, and terminal strips.
PC board can be damaged by static electricity.
b. If the original problem is recreated by the
substitution of the original board, then the PC
board was the problem. Reinstall the
replacement PC board and test the machine.
- Remove your body’s static
charge before opening the static-
shielding bag. Wear an anti-static
wrist strap. For safety, use a 1
Meg ohm resistive cord connected
6. Always indicate that this procedure was
followed when warranty reports are to be
submitted.
to
a
grounded part of the
equipment frame.
ATTENTION
Static-Sensitive
Devices
Handle only at
Static-Safe
- If you don’t have a wrist strap,
touch an un-painted, grounded,
part of the equipment frame. Keep
touching the frame to prevent
static build-up. Be sure not to
touch any electrically live parts at
the same time.
NOTE: Following this procedure and writing on the
warranty report, “INSTALLED AND SWITCHED PC
BOARDS TO VERIFY PROBLEM,” will help avoid
denial of legitimate PC board warranty claims.
Workstations
- Tools which come in contact with the PC board must
be either conductive, anti-static or static-dissipative.
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F-4
F-4
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
POSSIBLE AREAS OF
RECOMMENDED
(SYMPTOMS)
MISADJUSTMENT(S)
COURSE OF ACTION
OUTPUT PROBLEMS
Major physical or electrical damage 1. Contact your local authorized 1. Contact the Lincoln Electric
is evident when the sheet metal
cover is removed.
Lincoln Electric Field Service
Facility for technical assistance.
Service Department,
1-800-833-9353(WELD).
The machine is dead—no output— 1. Make sure the input line/breaker 1. Perform
the
Auxiliary
no displays.
switch is in the ON position.
Transformer Test.
2. Check the 3.5 amp circuit break-
er (CB3). Reset if tripped.
2. Perform the Power Board Test.
3. The control rectifier and or asso-
ciated filter capacitor (C5) may
be faulty. Check and replace as
necessary.
3. Check the main input line fuses.
If open , replace.
4. Check the 3.5 amp circuit break-
er (CB2). Reset if tripped.
4. Perform
The
SPI
Cable
5. Check the 6 amp circuit breaker
(CB1). Reset if tripped.
Resistance and Voltage Test.
5. The Control Board may be faulty.
6. Make sure the reconnect switch
and jumper lead is configured
correctly for the applied input
voltage.
7. If the machine is being operated
with single phase input voltage
make sure the red lead is not
connected. See the Installation
Section.
The main input fuses (or breaker) 1. Make certain the fuses or break- 1. Check the reconnect switches
repeatedly fail.
ers are sized properly.
and associated wiring. See the
Wiring Diagram.
2. Make sure the reconnect switch
and jumper lead is configured
correctly for the applied input
voltage.
2. Perform the Input Rectifier
Test.
3. Perform the Main Switch Board
Test.
3. The welding procedure may be
drawing too much input current
or the duty cycle may be too
high. Reduce the welding cur-
rent and /or reduce the duty
cycle.
4. Perform the Output Diode
Module Test.
5. The Input Filter Capacitors may
be faulty. Check, and if any are
faulty replace all four.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-800-833-9353(WELD).
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F-5
F-5
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
The V350-Pro does not have weld- 1. Make sure the reconnect switch 1. Check the reconnect switch and
ing output. The displays are lit.
is configured correctly for the
input voltage applied.
associated leads for loose or
faulty connections. See the
wiring diagram.
2. Make sure the Weld Terminals
Select is ON. If the problem is
solved the remote control
device or associated circuitry
may be faulty. See the wiring
diagram.
2. Perform the Main Switch
Board Test.
3. Perform the Power Board
Test.
4. Perform the Output Diode
3. Put the Control Select in the
Local position. If the problem is
solved the remote control
device or associated circuitry
may be faulty.
Module Test.
5. The control board may be faulty.
6. The input filter capacitors may
be faulty. Check and replace if
necessary.
4. If an error code is displayed see
Fault Code Explanations.
7. The remote board may be
faulty.
The V350-Pro will not produce full
output.
1. The input voltage may be too
low, limiting the output capabili-
ty of the machine. Make cer-
tain the input voltage is correct
for the machine and the recon-
nect switch and jumper lead
configuration.
1. Perform the Output Rectifier
Test.
2. Perform the Main Switch
Board Test.
3. Perform the Power Board
Test.
2. The welding current may be too
high . The machine will fold
4. Perform the Current
back to 100 amps if the weld-
ing current exceeds 450 amps.
Transducer Test.
5. If the preset function is not
performing properly the status
panel board or the output
control may be faulty.
3. Make sure the machine is in
"Local" output control.. If the
problem is resolved the Remote
control board or the external
remote control unit may be
faulty.
6. The control board may be
faulty.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-800-833-9353(WELD).
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F-6
F-6
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
The machine regularly overheats 1. Check the 3.5 amp circuit 1. The 115VAC fan motor is con-
and the yellow thermal light is ON
indicating a thermal overload.
breaker (CB2). Reset if tripped.
trolled by the control board via
the main switch board. Perform
the Fan Motor And Control
Test.
2. The welding application may
be exceeding the
recommended duty cycle of the
V350-Pro.
1. A thermostat or associated cir-
cuitry may be faulty. See the
wiring diagram. One normally
closed thermostat is located on
the output choke and the other
is located on the main switch
board heat sink. See the wiring
diagram.
3. Dirt and dust may have clogged
the cooling channels inside the
machine.
4. Air intake and exhaust louvers
may be blocked due to inade-
quate clearance around the
machine.
Note: The Main Switch Board
Removal Procedure will be
required to gain access to
the heat sink thermostat.
5. Make certain the fan as needed
(F.A.N.) is operating properly.
The fan should operate when
welding voltage is present
and/or when there is an over
temperature condition.
An attached wire feeder will not 1. Make certain the wire feeder 1. Perform
the
Auxiliary
function correctly.
control cable is connected to
the correct 14-pin amphenol
Transformer Test.
type
plug
(115VAC
or 2. Check the leads between the
24/42VAC) for the wire feeder
being used. See the connection
diagram. If wirefeeder has DIP
switch, be sure it is set correct-
ly.
14-pin amphenol type plugs and
the auxiliary transformer for
loose or faulty connections.
2. Check the two circuit breakers
located at the rear of the
machine. Reset if tripped.
3. The wire feeder or control cable
may be faulty.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-800-833-9353(WELD).
V350-PRO
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F-7
F-7
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
POSSIBLE AREAS OF
RECOMMENDED
(SYMPTOMS)
MISADJUSTMENT(S)
COURSE OF ACTION
FUNCTION PROBLEMS
The machine’s welding output is 1. Put the Control Select in the 1. Perform
the
Current
very high and uncontrollable.
Local position. If the problem is
solved the remote control
Transducer Test.
device or associated circuitry 2. If the output is normal when
may be faulty.
the Control Select is in the Local
position but the output is very
high in the Remote position the
remote board may be faulty.
Perform The SPI Cable
Resistance and Voltage Test.
2. Check for proper current and
voltage calibration.
3. The control board may be faulty.
The Weld Mode Select does not 1. Refer to Operation Section of 1. Check for loose or faulty plug
function properly.
this manual for normal operation
characteristics.
connections between the con-
trol board and the mode select
panel. See the wiring diagram.
NOTE: The mode panel is not pre-
sent if the advanced 2. Perform
the
SPI
Cable
process panel is installed.
Resistance and Voltage Test.
3. The Mode Select Panel board
may be faulty.
4. The control board may be faulty.
The output control and/or Weld 1. Refer to Operation Section of 1. Check for loose or faulty plug
Terminals Select functions do not
this manual for normal operation
connections
between
the
operate properly.
characteristics.
remote board and the weld/out-
put controls. See the wiring dia-
gram.
2. Check for proper current and
voltage calibration.
2. The Remote Board may be
faulty.
3. The control board may be faulty.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-800-833-9353(WELD).
V350-PRO
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F-8
F-8
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
POSSIBLE AREAS OF
RECOMMENDED
(SYMPTOMS)
MISADJUSTMENT(S)
COURSE OF ACTION
FUNCTION PROBLEMS
The display is not functioning prop- 1. Refer to the Operation Section 1. Check for loose or faulty plug
erly.
of this manual for normal opera-
connections
between
the
tion characteristics.
Display board and the control
board. See the wiring diagram.
2. Check for proper current and
voltage calibration.
2. The display board may be faulty.
3. The control board may be faulty.
A fault or error code is displayed.
1. See
the
Fault
Code 1. See Fault Code Explanations.
Explanations.
For no apparent reason the welding 1. Check the welding cables for 1. Perform the Voltage and
characteristics have change.
loose or faulty connection.
Current
Calibration
Procedure.
2. Make sure the machine’s mode
and output are set correctly for 2. Perform
the
Current
the process being used. (CV,
CC,TIG etc.)
Transducer Test.
3. Perform the Output Diode
3. If Mig welding make sure the
shielding gas and wire speed are
Module Test
correct for the process being 4. The control board may be faulty.
used.
4. Check for proper current and 5. The advanced process panel (If
voltage calibration.
used) may be faulty.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-800-833-9353(WELD).
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F-9
F-9
TROUBLESHOOTING & REPAIR
DESCRIPTION/
DEFINITION
CORRECTIVE
ACTION
SERVICE FACILITY
FAULT CODES
CORRECTIVE
ACTION
Perform the Main Switch
Board Test.
Main transformer
primary over current
Turn the machine off and
back on to reset the
machine. If condition
persists, contact an
authorized Lincoln Field
Service Facility.
31
Perform the Power
Board Test.
There may be a problem
with the primary current
sensors (CT) located on
the main switch board.
See the Wiring diagram
The control board may
be faulty.
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Capacitor bank “A”
(lower) is under
voltage
Make sure the reconnect
switches are configured
for the input voltage
being applied to the
machine. The machine
is self clearing when
condition ceases.
32
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
The control board may
be faulty.
NOTE: If more than one fault message is being displayed, perform all the checks for the faults
before replacing the printed circuit board
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F-10
F-10
TROUBLESHOOTING & REPAIR
DESCRIPTION/
DEFINITION
CORRECTIVE
ACTION
SERVICE FACILITY
FAULT CODES
CORRECTIVE
ACTION
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Capacitor bank
"B"(upper) is under
voltage.
Make sure the reconnect
switches are configured
for the input voltage
being applied to the
machine. The machine
is self-clearing when
condition ceases.
33
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
The control board may
be faulty.
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Capacitor bank
"A"(lower) is over
voltage.
Make sure the reconnect
switches are configured
for the input voltage
being applied to the
machine. The machine
is self-clearing when
condition ceases.
34
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
The control board may
be faulty.
NOTE: If more than one fault message is being displayed, perform all the checks for the faults
before replacing the printed circuit board
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F-11
F-11
TROUBLESHOOTING & REPAIR
DESCRIPTION/
DEFINITION
CORRECTIVE
ACTION
SERVICE FACILITY
FAULT CODES
CORRECTIVE
ACTION
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Capacitor bank
"B"(lower) is over
voltage.
Make sure the reconnect
switches are configured
for the input voltage
being applied to the
machine. The machine
is self-clearing when
condition ceases.
35
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
The control board may
be faulty.
There may be a problem
with the V/F signals from
the main switch board to
the control board.
The soft start
function failed.
Turn the machine off and
back on to reset the
machine.
37
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
The control board may
be faulty.
NOTE: If more than one fault message is being displayed, perform all the checks for the faults
before replacing the printed circuit board
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F-12
F-12
TROUBLESHOOTING & REPAIR
DESCRIPTION/
DEFINITION
CORRECTIVE
ACTION
SERVICE FACILITY
FAULT CODES
CORRECTIVE
ACTION
Perform the Main Switch
Board Test.
Electrical "glitch" on the
primary over current fault
detector circuit.
Possibly caused by an
external electrical
39
"noise" or signal level.
Make sure the V350-Pro
is grounded correctly.
The machine is self
clearing when
Perform the Power
Board Test.
There may be a problem
with the primary current
sensors (CT) located on
the main switch board.
See the wiring diagram.
condition ceases.
The control board may
be faulty.
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Capacitor banks "A"
(lower) and "B"(upper)
are not balanced.
Make sure the recon-
nect switches are con-
figured for the input
voltage being applied to
the machine. The
machine is self-clearing
when
43
Perform the Main Switch
Board Test.
condition ceases.
The capacitor(s) may be
faulty. Check and
replace if necessary.
Perform the Power
Board Test.
Make sure the V350-Pro
is grounded correctly.
The machine is self
clearing when
44
The machine has
detected a fault in the
central processing unit
The control board or
associated wiring may be
faulty. See the wiring
diagram.
(CPU).
condition ceases.
NOTE: If more than one fault message is being displayed, perform all the checks for the faults
before replacing the printed circuit board
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F-13
F-13
TROUBLESHOOTING & REPAIR
DESCRIPTION/
DEFINITION
CORRECTIVE
ACTION
SERVICE FACILITY
FAULT CODES
CORRECTIVE
ACTION
There may be a problem
with the V/F signals from
the main switch board to
the control board.
Electrical "glitch" on the
V/F signals from the main
switch board to the
control board.
Possibly caused by an
external electrical
47
"noise" or signal level.
Make sure the V350-Pro
is grounded correctly.
The machine is self
clearing when condition
ceases.
Perform the Main Switch
Board Test.
Perform the Power
Board Test.
The control board may
be faulty.
If new software was just
installed, try reinstalling
the software or put the
original software back.
The selected weld mode
does not exist in the weld
table that is presently
Press the Mode Select
button to select a
different welding mode.
“bad node” “####”
loaded in the machine.
Perform the Power
Board Test.
Perform the SPI Cable
Resistance and Voltage
Test.
The control board may
be faulty.
NOTE: If more than one fault message is being displayed, perform all the checks for the faults
before replacing the printed circuit board
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F-14
F-14
NOTES
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F-15
F-15
TROUBLESHOOTING & REPAIR
INPUT FILTER CAPACITOR DISCHARGE PROCEDURE
WARNING
Service and repair should be performed by only Lincoln Electric factory trained
personnel. Unauthorized repairs performed on this equipment may result in danger to
the technician or machine operator and will invalidate your factory warranty. For your
safety and to avoid electrical shock, please observe all safety notes and precautions
detailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This procedure will drain off any charge stored in the four large capacitors that are part
of the switch board assembly. This procedure MUST be performed, as a safety pre-
caution, before conducting any test or repair procedure that requires you to touch inter-
nal components of the machine.
MATERIALS NEEDED
5/16” Nut Driver
Insulated Pliers
Insulated Gloves
High Wattage Resistor (25-1000 ohms and 25 watts minimum)
DC Volt Meter
This procedure takes approximately 20 minutes to perform.
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F-16
F-16
TROUBLESHOOTING & REPAIR
INPUT FILTER CAPACITOR DISCHARGE PROCEDURE (continued)
4. Obtain a high resistance and high wattage resistor
(25-1000 ohms and 25 watts minimum). This
resistor is not with the machine. NEVER USE A
SHORTING STRAP FOR THIS PROCEDURE.
WARNING
ELECTRIC SHOCK can kill.
• Have an electrician install and service
this equipment.
5. Locate the eight capacitor terminals shown in fig-
ure F.1.
• Turn the input power off at the fuse box
before working on equipment.
6. Using electrically insulated gloves and pliers, hold
the body of the resistor with the pliers and con-
nect the resistor leads across the two capacitor
terminals. Hold the resistor in place for 10 sec-
onds. DO NOT TOUCH CAPACITOR TERMINALS
WITH YOUR BARE HANDS.
• Do not touch electrically hot parts.
• Prior to performing preventative maintenance,
perform the following capacitor discharge procedure
to avoid electric shock.
7. Repeat the discharge procedure for the other
three capacitors.
DISCHARGE PROCEDURE
8. Check the voltage across the terminals of all
capacitors with a DC voltmeter. Polarity of the
capacitor terminals is marked on the PC board
above the terminals. Voltage should be zero. If
any voltage remains, repeat this capacitor dis-
1. Remove the input power to the V350-PRO.
2. Using the 5/16” wrench remove the screws from
the case wraparound cover.
3. Be careful not to make contact with the capacitor
terminals located at the top and bottom of the
switch board.
charge procedure.
FIGURE F.1 – LOCATION OF INPUT FILTER CAPACITOR TERMINALS
EIGHT
CAPACITOR
TERMINALS
- +
- +
INSULATED
PLIERS
- +
- +
INSULATED
GLOVES
POWER
RESISTOR
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F-17
F-17
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the “power section” of the switch boards are functioning cor-
rectly. This test will NOT indicate if the entire PC board is functional. This resistance test is
preferable to a voltage test with the machine energized because this board can be damaged
easily. In addition, it is dangerous to work on this board with the machine energized.
MATERIALS NEEDED
Analog Volt/Ohmmeter
5/16 in. Wrench
7/16 in. Wrench
This procedure takes approximately 30 minutes to perform.
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F-18
F-18
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD TEST (continued)
FIGURE F.2 MAIN SWITCH BOARD LEAD LOCATIONS
207
202
J22
- +
- +
209
201
204
208
205
J21
J20
- +
- +
206
203
TEST PROCEDURE
4. Using a 7/16” wrench locate, label and remove
leads 201, 202, 203, 204, 205, 206, 207 and
208 from the switch board. Note lead and
washer placement for reassembly. Clear
leads.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver, remove the case
wraparound.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
5. Using the Analog ohmmeter, perform the resis-
tance tests detailed in Table F.1. Refer to fig-
ure F.2 for test point locations. Note: Test
using an Analog ohmmeter on the Rx1 range.
Make sure the test probes are making electri-
cal contact with the conductor surfaces on the
PC board.
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F-19
F-19
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD TEST (continued)
6. If any test fails replace the switch board. See
8. Reconnect leads 201, 202, 203, 204, 205, 206,
207, and 208 to the switch board. Ensure that the
leads are installed in their proper locations. Pre-
Torque all leads nuts to 25 inch lbs. before tight-
ening them to 44 inch lbs.
Main Switch Board Removal and Replacement.
7. If the switch board resistance tests are OK, check
connections on plugs J20, J21, J22 and all asso-
ciated wiring. See wiring diagram.
9. Replace the case wraparound cover using a 5/16”
nut driver.
TABLE F.1. SWITCH BOARD RESISTANCE TEST
APPLY NEGATIVE TEST
PROBE TO TERMINAL
NORMAL
RESISTANCE READING
APPLY POSITIVE TEST
PROBE TO TERMINAL
+206
+208
+202
+201
+205
+203
+204
+207
-205
-203
-204
-207
-206
-208
-202
-201
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
V350-PRO
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F-20
F-20
NOTES
V350-PRO
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F-21
F-21
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the input rectifier has “shorted” or “open” diodes.
MATERIALS NEEDED
Analog Voltmeter/Ohmmeter (Multimeter)
5/16” Nut Driver
Phillips Head Screwdriver
Wiring Diagram
This procedure takes approximately 25 minutes to perform.
V350-PRO
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F-22
F-22
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER TEST (CONTINUED)
TEST PROCEDURE
6. Using
a
phillips head screwdriver,
1. Remove input power to the V350-PRO
machine.
remove leads 207, 207A, and 209 from
the input rectifier.
2. Using a 5/16” nut driver, remove the case
wraparound cover.
7. Use the analog ohmmeter to perform the
tests detailed in Table F.2. See the
Wiring Diagram.
3. Perform the Capacitor Discharge
Procedure detailed earlier in this section.
8. Visually inspect the three MOV’S for
damage (TP1,TP2,TP3). Replace if nec-
essary.
4. Locate the input rectifier and associated
leads. See Figure F.3.
5. Carefully remove the silicone sealant
from leads 207, 207A, and 209.
Figure F.3 Input Rectifier
Small Lead "H1"
To Auxiliary Transformer
3/16" ALLEN
BOLTS
C
B
#207
#207A
A
#209
Small Lead "A"
To Circuit Breaker
FRONT
REAR
V350-PRO
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F-23
F-23
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER TEST (CONTINUED)
Table F.2 Input Rectifier Test Points
ANALOG METER
X10 RANGE
TEST POINT TERMINALS
Acceptable Meter Readings
+ PROBE
- PROBE
207
207
207
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
A
B
C
207A
207A
207A
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
A
B
C
209
209
209
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
A
B
C
A
B
C
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
207
207
207
A
B
C
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
207A
207A
207A
A
B
C
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
209
209
209
9. If the input rectifier does not meet the
acceptable readings outlined in Table F.2
the component may be faulty. Replace
11. If the input rectifier is faulty, see the
Input Rectifier Bridge Removal &
Replacement procedure.
Note: Before replacing the input rectifier,
check the input power switch and per-
form the Main Switch Board Test. Also
check for leaky or faulty filter capacitors.
12. Replace the case wraparound cover.
10. If the input rectifier is good, be sure to
reconnect leads 207, 207A, and 209 to
the correct terminals and torque to 31
inch lbs. Apply silicone sealant.
V350-PRO
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F-24
F-24
NOTES
V350-PRO
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F-25
F-25
TROUBLESHOOTING & REPAIR
POWER BOARD TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the power board is receiving the correct voltages and also if
the power board is regulating and producing the correct DC voltages.
MATERIALS NEEDED
Volt-Ohmmeter
5/16” Nut Driver
Wiring Diagram
This procedure takes approximately 30 minutes to perform.
V350-PRO
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F-26
F-26
TROUBLESHOOTING & REPAIR
POWER BOARD TEST (CONTINUED)
TEST PROCEDURE
7. If the 40VDC is low, or not present at plug
J41, check the rectifier bridge and C5 filter
capacitor. See Wiring Diagram. Also per-
form the Auxiliary Transformer Test.
1. Remove input power to the V350-PRO
machine.
2. Using a 5/16” nut driver, remove the case
wraparound cover.
8. If any of the DC voltages are low, or not
present at plugs J42 or J43, the power
board may be faulty.
3. Perform the Capacitor Discharge
Procedure detailed earlier in this section.
4. Locate the power board and plugs J41, J42
and J43. Do not remove plugs from the
power board. See Figure F.4.
9. Remove the input power to the V350-PRO.
10. Replace the case wraparound cover using
a 5/16” nut driver.
5. Carefully apply the correct input voltage to
the V350-PRO.
6. Carefully test for the correct voltages at the
power board. See Table F.3.
Figure F.4 Power Board Plug Location
J43
J42
J41
V350-PRO
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F-27
F-27
TROUBLESHOOTING & REPAIR
POWER BOARD TEST (CONTINUED)
Table F.3 Power Board Voltage Checks
NORMAL
ACCEPTABLE
VOLTAGE
CHECK POINT
TEST
DESCRIPTION
CONNECTOR
PLUG PIN NO.
LEAD NO.
OR IDENTITY
LOCATION
READING
2(+)
1(-)
POWER PC
BOARD
CONNECTOR
PLUG J41
CHECK 40VDC
SUPPLY FROM
RECT. BRIDGE
TO POWER BD.
65 (+)
66 (-)
38-42 VDC
65
66
1(+)
5(-)
POWER PC
BOARD
CONNECTOR
PLUG J42
CHECK +15VDC
SUPPLY FROM
POWER PC
BOARD
410
412 (+)
410 (-)
15 VDC
5 VDC
412
3(+)
5(-)
POWER PC
BOARD
CONNECTOR
PLUG J42
CHECK +5VDC
SUPPLY FROM
POWER PC
BOARD
410
408 (+)
410 (-)
408
2(+)
5(-)
POWER PC
BOARD
CONNECTOR
PLUG J42
CHECK -15VDC
SUPPLY FROM
POWER PC
BOARD
410
411
-15 VDC
5 VDC
411 (+)
410 (-)
3(+)
12(-)
POWER PC
BOARD
CONNECTOR
PLUG J43
CHECK +5VDC
“SPI” SUPPLY
FROM POWER
PC BOARD
401
403 (+)
401 (-)
403
4(+)
9(-)
CHECK +5VDC
“RS232”
SUPPLY FROM
POWER PC
BOARD
POWER PC
BOARD
CONNECTOR
PLUG J43
405
5 VDC
406 (+)
405 (-)
406
6(+)
12(-)
POWER PC
BOARD
CONNECTOR
PLUG J43
CHECK +15VDC
“SPI” SUPPLY
FROM POWER
PC BOARD
401
402
15 VDC
402 (+)
401 (-)
V350-PRO
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F-28
F-28
NOTES
V350-PRO
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F-29
F-29
TROUBLESHOOTING & REPAIR
OUTPUT DIODE MODULES TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if any of the output diodes are “shorted”.
MATERIALS NEEDED
Analog Voltmeter/Ohmmeter
Wiring Diagram
This procedure takes approximately 20 minutes to perform.
V350-PRO
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F-30
F-30
TROUBLESHOOTING & REPAIR
OUTPUT DIODE MODULES TEST (continued)
FIGURE F.5 Machine Output Terminals
AMPS
OLTS
V
CONTROL
SELECT
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
SELECT ATTRIBUTE
MEMORY BUTTON
SELECT KNOB
ADJUST ATTRIBUTE
_
+
NEGATIVE
OUTPUT
POSITIVE
OUTPUT
TERMINAL
TERMINAL
TEST PROCEDURE
4. Using the analog ohmmeter test for more
than 200 ohms resistance between positive
and negative output terminals. Positive test
lead to the positive terminal; Negative test
lead to the negative terminal. See Figure
F.6.
1. Remove input power to the V350-PRO.
2. Locate the output terminals on the front
panel of the machine. See Figure F.5.
3. Remove any output cables and load from the
output terminals.
NOTE: The polarity of the test leads is most
important. If the test leads polarity is not cor-
rect, the test will have erroneous results.
V350-PRO
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F-31
F-31
TROUBLESHOOTING & REPAIR
OUTPUT DIODE MODULES TEST (continued)
Figure F.6 Terminal Probes
_
+
5. If 200 ohms is measured then the output
diodes are not “shorted”.
NOTE: This may require the disassembly of
the leads and the snubber board from the
diode modules. Refer to the Output Diode
Modules Removal and Replacement
Procedure for detailed instructions.
NOTE: There is a 250 ohm resistor across the
welding output terminals.
6. If less than 200 ohms is measured, one or
more diodes or the snubber board may be
faulty.
7. Perform the Filter Capacitor Discharge
Procedure detailed earlier in this section.
8. Locate the output diode modules and snub-
ber board. See Figure F.7.
9. Test all output diode modules individually.
V350-PRO
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F-32
F-32
TROUBLESHOOTING & REPAIR
OUTPUT DIODE MODULES TEST (continued)
Figure F.7 Snubber and Output Diode Locations
Output Diode
Modules
Snubber
Board
LEFT SIDE
V350-PRO
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F-33
F-33
TROUBLESHOOTING & REPAIR
AUXILIARY TRANSFORMER TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This procedure will determine if the correct voltage is being applied to the primary of auxil-
iary transformer and also if the correct voltage is being induced on the secondary windings
of the transformer.
MATERIALS NEEDED
Volt-ohmmeter (Multimeter)
5/16” Nut Driver
Wiring Diagram
This procedure takes approximately 25 minutes to perform.
V350-PRO
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F-34
F-34
TROUBLESHOOTING & REPAIR
AUXILIARY TRANSFORMER TEST (continued)
FIGURE F.8 Auxiliary Transformer
Auxiliary
Transformer
Secondary Lead
Plugs P52
A A
M
PS
V V
OL
TS
A
C
C-STIC
OUTPU
T
K
70
60
W
E
CC-STICK
18
10
LD
T
E
TIG
R
M
G
T
IN
A
A
W
CV
CV
LS
-W
IRE
-FLU
X
HO
T
S
E
C
ST
AR
LE
C
O
RE
T
D
4
T
5
3
S
EL
6
E
CT
ARC
CO
2
W
A
R
N
I
N
G
7
NTROL
1
-2
0
8
-4
0
R
E
M
O
T
E
-6
+2
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
P
O
W
E
R
O
N
TEST PROCEDURE
4. Locate the auxiliary transformer. See Figure
F.8.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver, remove the case
wraparound cover.
5. Locate the secondary leads and plug P52.
See Figure F.8 and F.9.
3. Perform the Input Capacitor Discharge
Procedure detailed earlier in this section.
FIGURE F.9 Plug Lead Connections Viewed From Transformer Lead Side of Plug
532
42
24
2
5
1
6
7
8
3
4
10
12
14
15
16
9
11
13
Plug P52
54
31
541
V350-PRO
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F-35
F-35
TROUBLESHOOTING & REPAIR
AUXILIARY TRANSFORMER NO.1 TEST (continued)
TABLE F.4
NORMAL EXPECTED VOLTAGE
LEAD IDENTIFICATION
31 TO 532
42 TO 541
24 TO 541
54 TO 541
115 VAC
42 VAC
24 VAC
28 VAC
7. Carefully apply the correct input voltage to the
V350-PRO and check for the correct sec-
ondary voltages per table F.4. Make sure the
reconnect jumper lead and switch are config-
ured correctly for the input voltage being
applied. Make sure circuit breaker (CB3) is
functioning properly.
WARNING
High voltage is present at primary of
Auxiliary Transformer.
9. If the correct input voltage is applied to the
primary, and the secondary voltage(s) are not
correct, the auxiliary transformer may be
faulty.
NOTE: The secondary voltages will vary if the
input line voltage varies.
8. If the correct secondary voltages are present,
the auxiliary transformer is functioning proper-
ly. If any of the secondary voltages are miss-
ing or low, check to make certain the primary
is configured correctly for the input voltage
applied. See Wiring Diagram.
10. Remove the input power to the V350-PRO.
11. Install the case wraparound cover using a
5/16” nut driver.
V350-PRO
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F-36
F-36
NOTES
V350-PRO
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F-37
F-37
TROUBLESHOOTING AND REPAIR
CURRENT TRANSDUCER TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the current transducer and associated wiring are functioning
correctly.
MATERIALS NEEDED
Volt-ohmmeter
5/16” Nut Driver
Resistive Load Bank
External DC Ammeter
This procedure takes approximately 45 minutes to perform.
V350-PRO
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F-38
F-38
TROUBLESHOOTING AND REPAIR
CURRENT TRANSDUCER TEST (continued)
FIGURE F.10 Metal Plate Removal & Plug J8 Location
A A
M
PS
V V
OL
TS
A
CC
C
OUTPUT
-STICK 7018
W
C-STICK 6010
E
LD
SE
T
ER
TIG
M
G
IN
ALS
T
A
W
C
V
-W
IR
E
CV
-FLU
H
O
T
X
CO
S
LE
T
A
C
R
RED
R
T
4
T
5
3
SELEC
6
A
T
2
R
WA
C
C
O
R
N
I
N
G
7
N
T
1
O
L
-2
0
8
-4
0
R
E
M
O
T
E
+2
-6
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
P
O
W
E
R
O
N
Plug J8
6. Check for the correct DC supply voltages to
the current transducer at plug J8. See Figure
F.11.
TEST PROCEDURE
1. Remove input power to the V350-PRO.
2. Using the 5/16” nut driver, remove the case
wraparound cover.
A. Pin 2 (lead 802+) to pin 6 (lead 806-)
should read +15 VDC.
3. Perform the Input Capacitor Discharge
B. Pin 4 (lead 804+) to pin 6 (lead 806-)
should read -15 VDC.
Procedure.
4. Locate plug J8 on the control board. Do not
remove the plug from the P.C. Board.
7. If either of the supply voltages are low or miss-
ing, the control board may be faulty.
5. Apply the correct input power to the V350-
PRO.
FIGURE F.11. Plug J8 Viewed From Lead Side of Plug
802
804
801
Plug J8
806
V350-PRO
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F-39
F-39
TROUBLESHOOTING AND REPAIR
CURRENT TRANSDUCER TEST (continued)
TABLE F.5
EXPECTED TRANSDUCER FEEDBACK
OUTPUT LOAD CURRENT
VOLTAGE
300
250
2.4
2.0
200
150
100
1.6
1.2
0.8
8. Check the feedback voltage from the current
transducer using a resistive load bank and
with the V350-PRO in mode 200. Mode 200 is
a constant current test mode. This mode can
be accessed from the front panel of the V350
by pressing and holding the Mode Select but-
ton while turning the machine on. NOTE:
Machines with an Advanced Process Panels
do not have a mode select button. Use the
same procedure except hold in the Memory
button on the advanced process panel instead
of the mode select button. Then, rotate the
output knob while still holding the Mode Select
button in until the displays read “Mode 200”.
Release the Mode Select Button and the
machine will be in mode 200. With the V350-
PRO in mode 200, apply the grid load across
the output of the V350-PRO, set machine out-
put to 300 amps and enable WELD TERMI-
NALS. Adjust the grid load to obtain 300
amps on the external ammeter and check
feedback voltages per Table F.5.
9. If for any reason the machine cannot be
loaded to 300 amps, Table F.5. shows what
feedback voltage is produced at various cur-
rent loads.
10. If the correct supply voltages are applied to
the current transducer, and with the machine
loaded, the feedback voltage is missing or not
correct the current transducer may be faulty.
Before replacing the current transducer, check
the leads and plugs between the control board
(J8) and the current transducer (J90). See The
Wiring Diagram. For access to plug J90 and
the current transducer refer to: Current
Transducer Removal and Replacement
Procedure.
11. Remove input power to the V350-PRO.
12. Replace the control box top and any cable ties
previously removed.
13. Install the case wraparound cover using the
5/16” nut driver.
A. Pin 1 (lead 801) to Pin 6 (lead 806) should
read 2.4 VDC (machine loaded to 300
amps).
V350-PRO
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F-40
F-40
NOTES
V350-PRO
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F-41
F-41
TROUBLESHOOTING AND REPAIR
FAN CONTROL AND MOTOR TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the fan motor, control board, switch board, or associated leads
and connectors are functioning correctly.
MATERIALS NEEDED
Voltmeter
5/16” Nut Driver
This procedure takes approximately 40 minutes to perform.
V350-PRO
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F-42
F-42
TROUBLESHOOTING AND REPAIR
FAN CONTROL AND MOTOR TEST (continued)
TEST PROCEDURE
3. Perform the Input Filter Capacitor Discharge
1. Remove the input power to the V350-PRO
machine.
Procedure.
4. Locate plug J22 on the main switch board. Do
not remove the plug from the board. See
Figure F.12.
2. Using the 5/16” nut driver, remove the case
wraparound cover.
FIGURE F.12 PLUG J22 LOCATION
J22
J21
J20
5. Carefully apply the correct input power to the
machine.
6. Carefully check for 115VAC at plug J22 pin-2
to J22 pin-3. (leads 32A to 31B(C) See Figure
F.13. WARNING: HIGH VOLTAGE IS PRE-
SENT AT THE MAIN SWITCH BOARD.
FIGURE F.13 PLUG J22
Fan Lead
2
1
3
Lead 32A
4
Fan Lead
Lead 31B(C)
Plug J22
V350-PRO
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F-43
F-43
TROUBLESHOOTING AND REPAIR
FAN CONTROL AND MOTOR TEST (continued)
7. If the 115VAC is low or not present check cir-
FAN CONTROL TEST PROCEDURE
cuit breaker CB2 located on the front panel. If
the circuit breaker is OK, perform The
Auxiliary Transformer Test. Check plug J22,
circuit breaker CB2 and associated leads for
loose or faulty connections. See the Wiring
Diagram.
1. Locate plug J20 on the switch board. Do not
remove the plug from the switch board. See
Figure F.12 and F.14.
2. Energize the weld output terminals (Select
Weld Terminals ON) and carefully check for
+15VDC at plug J20 pin-6+ to J20 pin-2-
(leads 715 to 716). See Figure F.14. If the
15VDC is present and the fan is not running
then the switch board may be faulty. If the
15VDC is not present when the weld terminals
are energized then the control board may be
faulty. Also check plugs J20, J7, and all asso-
ciated leads for loose or faulty connections.
See the Wiring Diagram.
8. Energize the weld output terminals (Select
Weld Terminals ON) and carefully check for
115VAC at plug J22 pin-1 to J22 pin-4 (fan
leads). See Figure F.13. If the 115VAC is pre-
sent and the fan is not running then the fan
motor may be faulty. Also check the associat-
ed leads between plug J22 and the fan motor
for loose or faulty connections. See the Wiring
Diagram. WARNING: HIGH VOLTAGE IS
PRESENT AT THE SWITCH BOARD.
WARNING: HIGH VOLTAGE IS PRESENT AT
THE SWITCH BOARD.
9. If the 115VAC is NOT present in the previous
step then proceed to the fan control test.
3. Remove the input power to the V350-PRO.
Note: The fan motor may be accessed by the
removal of the rear panel detailed in The
Current
Transducer
Removal
and
Replacement Procedure.
4. Replace the case wrap-around cover.
FIGURE F.14 PLUG J20
Lead 716-
1
3
2
4
8
5 6 7
Plug J20
Lead 715+
V350-PRO
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F-44
F-44
NOTES
V350-PRO
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F-45
F-45
TROUBLESHOOTING AND REPAIR
SPI CABLE RESISTANCE AND VOLTAGE TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if there is a possible “open” in the SPI cable and also determine
if the correct supply voltages are being applied to the boards in the SPI network.
MATERIALS NEEDED
Volt/Ohmmeter
5/16” Nut Driver
This procedure takes approximately 35 minutes to perform.
V350-PRO
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F-46
F-46
TROUBLESHOOTING AND REPAIR
SPI CABLE RESISTANCE AND VOLTAGE TEST (continued)
8. Reconnect the plug into the control board and
perform the Display Board Replacement
Procedure.
TEST PROCEDURE
1. Remove the input power to the V350-PRO.
2. Using the 5/16” nut driver, remove the case
wraparound cover.
9. With plug J3 still removed from the control
board, carefully apply the correct input power
to V350-PRO.
3. Perform the Capacitor Discharge Procedure.
10. Turn on the machine.
4. Perform the Display Board Removal
Procedure. Do not remove the SPI ribbon
cable connecting the display board to the
remote/status boards.
11. Carefully check for the presence of +15VDC
from plug J3 pin -1(+) to plug J3 pin -10(-) at
the control board receptacle. See Figure F.15.
5. Locate and remove plug J3 from the control
board. See Figure F.15.
12. Carefully check for the presence of +5VDC
from plug J3 pin -2(+) to plug J3 pin -10(-) at
the control board receptacle. See Figure F.15.
6. Check the resistance and continuity of the SPI
cable by testing with the ohmmeter from each
pin on plug J3 to the corresponding pins on
plug J34. See the Wiring Diagram.
13. If either of these voltages are low or not pre-
sent, the control board may be faulty. Replace.
Also Perform the Power Board Test.
7. The resistance reading pin to corresponding
pin should be zero ohms or very low resis-
tance. If the resistance reading is high or
“open” check the plug connections to the SPI
network PC boards. If the connections are OK
and the resistance is high or “open” the SPI
cable may be faulty.
14. Remove the input power to the V350-PRO
machine.
15. Replace plug J3 into the control board.
16. Replace any cable ties previously removed.
17. Replace the case wrap-around cover.
FIGURE F.15 Plug J3
Pin 1
Pin 2
Plug J3
J3
Pin 10
V350-PRO
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F-47
F-47
TROUBLESHOOTING AND REPAIR
VOLTAGE AND CURRENT CALIBRATION PROCEDURE
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the machine is capable of producing welding output and to
check and adjust, if necessary, the voltage and or current calibration.
MATERIALS NEEDED
Resistive Load Bank
Calibrated Test Voltmeter
Calibrated Test Ammeter
This procedure takes approximately 20 minutes to perform.
V350-PRO
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F-48
F-48
TROUBLESHOOTING AND REPAIR
VOLTAGE AND CURRENT CALIBRATION PROCEDURE (continued)
CALIBRATION CHECK
VOLTAGE CALIBRATION
The calibration of the V350-PRO can be checked
using a resistive load bank with the V350-PRO in
mode 200. Mode 200 is a constant current test
mode.
1. Connect the resistive load band (approximate-
ly .087 ohms) and test voltmeter to the welding
output terminals.
2. Press and hold in the Mode Select/Memory
button.
1. Press and hold in the Mode Select button.
2. Turn on the V350-PRO.
3. Turn on the V350-PRO.
3. Rotate the output knob, while still holding the
mode select button in, until the displays read
4. Rotate the Output Control knob until the dis-
play reads “vol cAL”.
“mode 200”.
NOTE: Machines with an
5. Release the Mode Select/Memory button.
Advanced Process Panels do not have a mode
select button. Use the same procedure except
hold in the Memory button on the advanced
process panel instead of the mode select but-
ton.
6. Adjust the output control knob until the actual
output voltage reading on the test volt meter is
20volts +/- .5 volts.
7. Wait for the machine’s output to be automati-
cally turned off and then back on.
4. Release the Mode Select/Memory button and
the machine will be in mode 200.
8. Adjust the Output Control knob again if neces-
sary to make the actual voltage output 20 volts
+/- .5 volts.
5. With the machine in mode 200 apply a resistive
load to the welding output terminals (approxi-
mately .087 ohms) set the machine output to
300 amps and enable the Weld Terminals.
(Weld Terminals Select ON).
9. Wait for the machine’s output to be automati-
cally turned off and then back on.
10. Repeat the above two steps if necessary.
6. Using the test meters note the output voltage
and current.
11. Press and release the Mode Select/Memory
button to save the calibration.
7. The V350-PRO voltmeter must match the test
meter reading to within +/- 1 volt.
NOTE: If the Mode Select/Memory button is
not pressed within 30 seconds after adjusting
the Output Control knob the machine will leave
the calibration mode and use the previous cal-
ibration settings.
8. The V350-PRO ammeter must match the test
meter within +/- 5 amps.
9. If the voltmeter does not meet the specification
then proceed to the Voltage Calibration
Procedure.
10. If the ammeter does not meet the specification
then proceed to the Current Calibration
Procedure.
NOTE: Before attempting to calibrate the voltage
or current setting of the V350-PRO, be sure to read
the entire voltage or current calibration section. If
the steps are not completed quickly, the machine
will automatically leave the calibration mode with-
out changing the calibration settings. The voltage
and current calibration settings of the V350-PRO
are completely independent of each other.
Adjusting one will not affect the other.
V350-PRO
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F-49
F-49
TROUBLESHOOTING AND REPAIR
VOLTAGE AND CURRENT CALIBRATION PROCEDURE (continued)
CURRENT CALIBRATION
PROCEDURE
1. Connect the resistive load band (approxi-
mately .087 ohms) and test ammeter to the
welding output terminals.
10. Adjust the Output Control knob again if
necessary to make the actual output cur-
rent reading on the test ammeter 300
amps +/-2A.
2. Press and hold in the Mode Select/Memory
button.
11. Wait for the machines output to be a u t o -
matically turned off and then back on.
3. Turn on the V350-PRO.
12. Repeat the above two steps if necessary.
4. Rotate the Output Control knob until the
display reads “cur cAL”.
13. Press
and
release
the
Mode
Select/Memory button to save the calibra-
tion.
5. Release the Mode Select/Memory button.
6. The left display will change to “IcAL” to
indicate that current calibration is in
progress.
14. The left display will scroll the message IcAL
SAVEd.
15. The machine will reset to normal operation.
7. The right display will scroll the following
message: Adj oCP SorEAL cur-300A.
NOTE: If the Mode Select/Memory button
is not pressed within 30 seconds after
adjusting the Output Control knob the
machine will leave the calibration mode
and use the previous calibration settings.
8. Adjust the Output Control knob until the
actual output current reading on the test
ammeter is 300amps +/-2A.
9. Wait for the machines output to be
automatically turned off and then back on.
V350-PRO
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F-50
F-50
NOTES
V350-PRO
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F-51
F-51
TROUBLESHOOTING & REPAIR
CONTROL BOARD REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353) (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the control board for maintenance
or replacement.
MATERIALS NEEDED
5/16” Nut Driver
3/8” Nut Driver
Flathead Screwdriver
Phillips Head Screwdriver
This procedure takes approximately 30 minutes to perform.
V350-PRO
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F-52
F-52
TROUBLESHOOTING & REPAIR
CONTROL BOARD REMOVAL AND REPLACEMENT (continued)
FIGURE F.16 - CONTROL BOARD LOCATION
A A
M
PS
V V
OL
TS
CC-STICK 7018
CC-STICK 6010
OUTPUT
WELD
TERMINALS
TIG
CV
G
T
A
W
-WIRE
CV
-FLUX CORED
HOT
SELECT
ST
AR
4
T
5
3
SELECT
6
2
AR
WA
C
CO
NT
R
N
I
N
G
7
1
ROL
-2
0
8
-4
0
R
E
M
O
T
E
-6
+2
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
P
O
W
E
R
O
N
Control Board
PROCEDURE
4. Locate the control board behind the front panel of
the machine. See Figure F.16.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
5. Using a 5/16” nut driver remove the two screws
from the bottom of the front of the machine. See
Figure F.17.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
FIGURE F.17 CASE FRONT SCREW REMOVAL
AMPS
VOLTS
CONTROL
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
SELECT
SELECT ATTRIBUTE
MEMORY BUTTON
SELECT KNOB
ADJUST ATTRIBUTE
Flathead Screws
Phillips Head
Screws
_
+
5/16" Screws
V350-PRO
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F-53
F-53
TROUBLESHOOTING & REPAIR
CONTROL BOARD REMOVAL AND REPLACEMENT (continued)
FIGURE F.18. - CONTROL BOARD ALL PLUG LOCATIONS
J6
J7
J5
J8
J9
J4
J3
A A
M
PS
V V
OL
TS
A
CC
OUTPUT
-STIC
K
K
WELD
C
C
7018
-STIC
TERMINALS
TIG
G
6
010
TA
J10B
W
C
V
-W
IR
E
C
V-
F
HOT
S
L
SELECT
U
X
CO
T
R
AR
E
D
4
T
5
3
SE
LE
6
C
ARC
2
T
W
A
R
N
I
N
G
C
ONTROL
7
1
-2
0
8
-4
0
+2
R
E
M
O
T
E
-6
9
10
+4
+6
-8
-10
SOFT
+8
+10
CRISP
J10A
P
O
W
E
R
O
N
8. The front of the machine may now gently be pulled
forward to gain access to the display Board. Note:
The front of the machine cannot be removed com-
pletely, only pulled forward a few inches.
CAUTION
Observe static precautions detailed in PC
Board Troubleshooting Procedures at the
beginning of this section.
9. Beginning at the right side of the control board
remove plugs J10A and J10B. Note: Be sure to
label each plugs position upon removal. See
Figure F.18.
10. Working your way across the top of the board
from right to left, label and remove plugs #J9, #J8,
#J7, #J6, and #J5. See Figure F.18.
6. Using a flat head screwdriver remove the two
screws and their washers from above and below
the input power switch. See Figure F.17.
11. Working your way down the left side of the board,
label and remove plugs #J4 and #J3. See Figure
F.18.
7. Using a phillips head screwdriver remove the four
screws from around the two welder output termi-
nals on the front of the machine. See Figure F.17.
V350-PRO
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F-54
F-54
TROUBLESHOOTING & REPAIR
CONTROL BOARD REMOVAL AND REPLACEMENT (continued)
12. Using a 3/8” nut driver remove the two mounting
nuts from the top two corners of the control
board. See Figure F.19.
14. Replace the control board.
13. Cut any necessary cable ties.
FIGURE F.19 CONTROL BOARD MOUNTING SCREW LOCATION
Mounting
Nuts (3/8")
15. Replace the two 3/8” mounting nuts at the top
two corners of the control board.
19. Replace the four screws from around the two
welder output terminals on the front of the
machine.
16. Replace any previously removed cable ties.
20. Replace the two case front mounting screws at
the bottom of the front of the machine.
17. Replace plugs #J3, #J4, #J5, #J6, #J7, #J8, #J9,
#J10B, and #J10A previously removed.
21. Replace the case wraparound cover.
18. Replace the two screws and their washers from
above and below the input power switch.
22. Perform the Voltage and Current Calibration
Procedure.
V350-PRO
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F-55
F-55
TROUBLESHOOTING & REPAIR
DISPLAY BOARD REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call or 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the display board for maintenance
or replacement.
MATERIALS NEEDED
5/16” Nut Driver
Flathead Screwdriver
Phillips Head Screwdriver
This procedure takes approximately 30 minutes to perform.
V350-PRO
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F-56
F-56
TROUBLESHOOTING & REPAIR
DISPLAY BOARD REMOVAL & REPLACEMENT (continued)
FIGURE F.20. – DISPLAY BOARD LOCATION
Display Board
C
S
3
L
1
7
1
D
1
1
1
Mode Board
1
0
-
L
1
1
1
0
7
-
2
or Advanced
S
T
A
T
U
S
I
N
P
U
T
Process Board
M
O
DE SELECT
L1
1
1
10-1
A A
M
PS
V V
OL
TS
A
C
C-STIC
OUTPUT
K
K
7018
6010
WELD TERMINALS
CC
-STIC
TIG
CV
G
T
A
W
-W
IRE
CV
-FLU
X
HOT
S
SELECT
CO
T
RED
AR
4
T
5
3
SELECT
6
ARC
2
W
A
R
N
I
N
G
C
ONTROL
7
1
-2
0
8
-4
0
R
E
M
O
T
E
+2
-6
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
P
O
W
E
R
O
N
PROCEDURE
3. Perform the Input Filter Capacitor
Discharge Procedure detailed earlier in this
section.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case
wraparound cover.
4. Locate the display board behind the front
panel of the machine. See Figure F.20.
V350-PRO
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F-57
F-57
TROUBLESHOOTING & REPAIR
DISPLAY BOARD REMOVAL & REPLACEMENT (continued)
FIGURE F.21. – CASE FRONT SCREW LOCATION
AMPS
OLTS
V
CONTROL
SELECT
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
SELECT ATTRIBUTE
MEMORY BUTTON
SELECT KNOB
ADJUST ATTRIBUTE
Flathead Screws
Phillips Head
Screws
_
+
5/16" Screws
5. Using a 5/16” nut driver remove the two
screws from the bottom of the front of the
machine. See Figure F.21.
8. The front of the machine may now gently be
pulled forward to gain access to the display
Board. Note: The front of the machine cannot
be removed completely, only pulled forward a
few inches.
6. Using a flat head screwdriver remove the two
screws and their washers from above and
below the input power switch. See Figure
F.21.
9. The display board is now accessible to
replace.
7. Using a phillips head screwdriver remove the
four screws from around the two welder out-
put terminals on the front of the machine. See
Figure F.21.
V350-PRO
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F-58
F-58
TROUBLESHOOTING & REPAIR
DISPLAY BOARD REMOVAL & REPLACEMENT (continued)
10. Remove plug J37 from the display board. See the
Wiring Diagram.
\15. Replace the four phillips head screws removed
from the front of the machine located around the
two welder output terminals.
11. Remove plug J3 originating from the control
board located directly across from the display
board. See the Wiring Diagram.
16. Replace the two flat head screws and their wash-
ers mounting the input power switch.
12. Remove the display board. Note: Gentle prying
from behind the board may be required.
17. Using a 5/16” nut driver replace the two screws
previously removed from the bottom front of the
machine.
13. Replace the display board.
18. Replace the case wraparound cover.
14. Replace plugs #J3 and #J37 previously removed.
V350-PRO
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F-59
F-59
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the main switch board for main-
tenance or replacement.
MATERIALS NEEDED
5/16” Nut Driver
Flathead Screwdriver
7/16” mm Socket
3/16” Allen Wrench
3/8” Nut Driver
This procedure takes approximately 35 minutes to perform.
V350-PRO
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F-60
F-60
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)
FIGURE F.22. – MAIN SWITCH BOARD LEAD LOCATIONS
207
202
J22
- +
- +
209
201
204
208
205
J21
J20
- +
- +
206
203
PROCEDURE
1. Remove the input power to the V350-PRO.
5. Using a 5/16” and 3/8” nut driver remove the
input lead shield from the area at the bottom of
the main switch board.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
6. Using a 7/16” socket, remove leads 201, 202,
203, 204, 205, 206, 207, 208, 209 from the
switch board. Note lead terminal locations and
washer positions upon removal.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
7. Locate and disconnect the three harness plugs
associated with the main switch board. Plugs
#J20, #J21, #J22. See Figure F.22.
CAUTION
Observe static precautions detailed in PC Board
Troubleshooting Procedures at the beginning of
this section. Failure to do so can result in perma-
nent damage to equipment.
8. Locate the eight capacitor terminals and
remove the nuts using a 7/16” socket or nut
driver. Note the position of the washers behind
each nut for replacement.
4. Locate the main switch board and all associat-
ed plug and lead connections. See figure F.22.
See Wiring Diagram.
V350-PRO
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F-61
F-61
TROUBLESHOOTING & REPAIR
MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)
FIGURE F.23. – 3/16” ALLEN BOLT LOCATION
- +
- +
3/16" ALLEN BOLTS
- +
- +
9. Using a 3/16” allen wrench remove four allen
bolts and washers as shown in Figure F.23.
At this point, the board is ready for removal.
Carefully remove the board from the 4 nylon
mounting pins. Note: Depress the retaining
pins on the sides of the nylon mounts to
release the board. See Figure F.24.
13. Replace the four allen bolts and washers
previously removed.
14. Replace the eight capacitor terminal nuts,
washers, and necessary leads previously
removed.
15. Reconnect the three harness plugs previous-
ly removed.
10. Carefully maneuver the board out of the
machine.
16. Reconnect the nine leads (#201-#209) that
were previously removed.
11. Apply a thin coat of Penetrox A-13 to the
IGBT heatsinks on the back of the new
switch boards mating surfaces. Note: Keep
compound away from the mounting holes.
17. Pre-torque all screws to 25 inch lbs. before
tightening to 44 inch lbs.
12. Mount the new board on the nylon mount-
ing pins.
18. Replace the case wraparound cover.
FIGURE F.24. – NYLON MOUNTING PIN
DEPRESS
LOCKING TAB ON
MOUNTING PIN
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F-62
F-62
NOTES
V350-PRO
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F-63
F-63
TROUBLESHOOTING & REPAIR
ADVANCED PROCESS PANEL
REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the mode board for maintenance
or replacement.
MATERIALS NEEDED
5/16” Nut Driver
Small Flathead Screwdriver
Flathead Screwdriver
Small Phillips Head Screwdriver
Phillips Head Screwdriver
9/16” Wrench
This procedure takes approximately 40 minutes to perform.
V350-PRO
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F-64
F-64
TROUBLESHOOTING & REPAIR
ADVANCED PROCESS PANEL
REMOVAL AND REPLACEMENT (continued)
FIGURE F.25. – MODE BOARD LOCATION
Display Board
C
S
7
1
D
1
1
L
1
11
Mode Board
or Advanced
Process Board
3
0
-
L
1
1
1
0
7
-
2
S
T
A
T
U
S
I
N
P
U
T
M
O
DE SELECT
L1
1
1
10-1
A A
M
PS
V V
OL
TS
A
C
C-STIC
OUTPUT
K
K
7018
6010
WELD TERMINALS
CC-STIC
TIG
G
T
A
W
CV
-W
IRE
CV
-FLU
X
HOT
S
SELECT
CO
T
RED
AR
4
T
5
3
SELECT
6
ARC
2
WA
C
R
N
ONTROL
I
N
G
7
1
-2
0
8
-4
0
R
E
M
O
T
E
+2
-6
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
P
O
W
E
R
O
N
PROCEDURE
3. Perform the Input Filter Capacitor
1. Remove input power to the V350-PRO.
Discharge Procedure detailed earlier in this
section.
2. Using a 5/16” nut driver remove the case
wraparound cover.
4. Locate the advanced process board behind
the front panel of the machine. See Figure
F.25.
V350-PRO
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F-65
F-65
TROUBLESHOOTING & REPAIR
ADVANCED PROCESS PANEL
REMOVAL AND REPLACEMENT (continued)
FIGURE F.26. – CASE FRONT SCREW REMOVAL
AMPS
OLTS
V
CONTROL
SELECT
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
SELECT ATTTRIBUTE
MEMORY BBUTTON
SELECTT KNOB
ADJUST ATTRIBUTE
Flathead Screws
Phillips Head
Screws
_
+
5/16" Screws
5. Using a 5/16” nut driver remove the two screws
from the bottom of the front of the machine.
See Figure F.26.
7. Using a phillips head screwdriver remove the
four screws from around the two welder output
terminals on the front of the machine. See
Figure F.26.
6. Using a flat head screwdriver remove the two
screws and their washers from above and
below the input power switch. See Figure
F.26..
8. The front of the machine may now gently be
pulled forward to gain access to the mode
board. Note: The front of the machine cannot
be removed completely, only pulled forward a
few inches.
V350-PRO
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F-66
F-66
TROUBLESHOOTING & REPAIR
ADVANCED PROCESS PANEL
REMOVAL AND REPLACEMENT (continued)
FIGURE F.27.. – CASE FRONT
AMPS
OLTS
V
CONTROL
SELECT
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
5/16" Screws
SELECT ATTRIBUTE
MEMORY BUTTON
SELECT KNOB
ADJUST ATTRIBUTE
Adjust Knob
Select Knob
_
+
9. Remove plug #J33 from the remote board. See
the Wiring Diagram.
14. Using a 9/16” wrench remove the nuts and their
washers behind the two knobs previously
removed.
10. Open the cover of the weld mode display on
the front of the machine.
15. Perform the Remote Board Removal
Procedure. (Start at step #10)
11. Using a 5/16” nut driver, remove the three 5/16”
screws as shown in Figure F.27.
16. Using a phillips head screwdriver remove the
two phillips head mounting screws at the bot-
tom of the Advanced Process board.
12. Place both knobs in the six o’clock position.
13. Using a small flathead screwdriver, loosen the
screw in the “Select” knob and the “Adjust”
knob. The knobs should slide off of their
shafts. See Figure F.28.
17. Remove the Advanced Process board.
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F-67
F-67
TROUBLESHOOTING & REPAIR
ADVANCED PROCESS PANEL
REMOVAL AND REPLACEMENT (continued)
FIGURE F.28. – SCREW IN CAP
Small Flathead
Screwdriver
18. Replace the Advanced Process board.
25. Replace the four phillips head screws removed
from the front of the machine located around
the two welder output terminals.
19. Replace the two phillips head screws at the
bottom of the advanced process board.
26. Replace the two flat head screws and their
washers from around the input power switch.
20. Perform the Remote Board Replacement
Procedure.
27. Using a 5/16” nut driver replace the two
screws previously removed from the bottom
front of the machine
21. Replace the 9/16” nuts and their washers
behind the “Adjust” and “Select” knobs.
22. Using a small screwdriver replace the two
knobs previously removed.
28. Replace the case wraparound cover.
23. Replace the three 5/16” screws previously
removed from the front of the machine located
around the Advanced Process board.
24. Reconnect plug #J33 previously removed.
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F-68
F-68
NOTES
V350-PRO
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F-69
F-69
TROUBLESHOOTING & REPAIR
REMOTE BOARD REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the status board for maintenance
or replacement.
MATERIALS NEEDED
5/16” Nut Driver
Flathead Screwdriver
Phillips Head Screwdriver
This procedure takes approximately 30 minutes to perform.
V350-PRO
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F-70
F-70
TROUBLESHOOTING & REPAIR
REMOTE BOARD REMOVAL AND REPLACEMENT (continued)
PROCEDURE
3. Perform the Input Filter Capacitor Discharge
1. Remove input power to the V350-PRO.
Procedure detailed earlier in this section.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
4. Locate the remote board behind the front panel of
the machine. See Figure F.29.
FIGURE F.29. – REMOTE BOARD LOCATION
Remote Board
Display Board
C
S
7
1
D
1
1
L
1
1
Mode Board
or Advanced
Process Board
1
3
0
-
L
1
1
1
0
7
-
2
S
T
A
T
U
S
I
N
P
U
T
M
O
D
E
SELECT
L
1
1
1
1
0
-1
A A
M
PS
V V
OL
TS
A
C
C
C
OUTPUT
-S
-S
T
IC
IC
K
WELD TERMINALS
SELECT
7
6
C
0
1
1
T
8
K
T
IG
0
G
0
T
A
W
C
C
V
-W
IR
E
V
-F
H
O
T
L
U
X
C
S
O
T
A
R
E
R
D
4
T
A
5
3
S
E
6
L
E
C
T
2
R
W
C
A
R
N
I
N
G
C
O
7
N
T
1
R
O
L
-2
0
8
-4
0
R
E
M
O
T
E
+2
-6
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
P
O
W
E
R
O
N
V350-PRO
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F-71
F-71
TROUBLESHOOTING & REPAIR
REMOTE BOARD REMOVAL AND REPLACEMENT (continued)
5. Using a 5/16” nut driver remove the two screws
from the bottom front of the machine. See Figure
F.30.
8. The front of the machine may now gently be pulled
forward to gain access to the remote Board.
Note: The front of the machine cannot be removed
completely, only pulled forward a few inches.
6. Using a flat head screwdriver remove the two
screws and their washers from around the input
power switch. See Figure F.30.
9. The remote board is now accessible to replace.
7. Using a phillips head screwdriver remove the four
screws from around the two welder output termi-
nals on the front of the machine. See Figure F.30.
FIGURE F.30. – FRONT SCREW REMOVAL
AMPS
OLTS
V
CONTROL
WELD TERMINALS
REMOTE
LOCAL
REMOTE
ON
OUTPUT
SELECT
SELECT
SELECT ATTTRIBUTE
MEMORY BBUTTON
SELECTT KNOB
ADJUST ATTRIBUTE
Flathead Screws
Phillips Head
_
Screws
+
5/16" Screws
V350-PRO
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F-72
F-72
TROUBLESHOOTING & REPAIR
REMOTE BOARD REMOVAL AND REPLACEMENT (continued)
10. Remove plug J37 from the display board. See
Wiring Diagram.
17. Replace plug J37 previously removed from the
display board.
11. Remove plugs J33, J333 and J331 from the
remote board.
18. Replace the four phillips head screws removed
from the front of the machine located around the
two welder output terminals.
12. Using a flat head screwdriver, remove the two
mounting screws and washers from the bottom of
the remote board. See Figure F.31.
19. Replace the two flat head screws and their wash-
ers from around the input power switch.
13. Remove the remote board.
14. Replace the remote board.
20. Using a 5/16” nut driver replace the two screws
previously removed from the bottom front of the
machine
15. Replace the two flat head mounting screws and
washers previously removed from the bottom of
the remote board.
21. Replace the case wraparound cover.
16. Replace plugs J331, J333, J33 and previously
removed from the remote board.
FIGURE F.31. – REMOTE BOARD (PLUG LOCATION)
J33
Remote
Board
J333
J331
Flathead
Mounting Screws
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F-73
F-73
TROUBLESHOOTING & REPAIR
SNUBBER BOARD REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the snubber board for mainte-
nance or replacement.
MATERIALS NEEDED
5/16” Nut Driver
7/16 Socket or Nut Driver
This procedure takes approximately 15 minutes to perform.
V350-PRO
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F-74
F-74
TROUBLESHOOTING & REPAIR
SNUBBER BOARD REMOVAL AND REPLACEMENT (continued)
PROCEDURE
3. Perform the Input Filter Capacitor Discharge
1. Remove input power to the V350-PRO.
Procedure detailed earlier in this section.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
4. Locate the snubber board.. See Figure F.32.
FIGURE F.32. – SNUBBER BOARD LOCATION
Snubber
Board
LEFT SIDE
5. Remove small lead #B1 from the board. See
Figure F.33.
7. Carefully remove the snubber board.
8. Replace the snubber board.
6. Remove the four bolts using a 7/16” socket. Two
of these bolts have leads #30 and #10 connected
to them. Note the position of all leads and associ-
ated washers upon removal.
9. Replace the bolts, leads, and washers previously
removed. Torque bolt to 30-40 Inch Lbs.
10. Replace the case wraparound cover.
FIGURE F.33. – SNUBBER BOARD LEADS (CLOSE UP)
Lead 30
Lead B1
Lead 20
V350-PRO
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F-75
F-75
TROUBLESHOOTING & REPAIR
POWER BOARD REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the power board for maintenance
or replacement.
MATERIALS NEEDED
5/16” Nut Driver
3/8” Nut Driver
This procedure takes approximately 20 minutes to perform.
V350-PRO
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F-76
F-76
TROUBLESHOOTING & REPAIR
POWER BOARD REMOVAL AND REPLACEMENT (continued)
FIGURE F.34. POWER BOARD LOCATION
POWER BOARD
LEFT SIDE
PROCEDURE
3. Perform the Input Filter Capacitor Discharge
1. Remove input power to the V350-PRO.
Procedure detailed earlier in this section.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
4. Locate the power board. See Figure F.34.
V350-PRO
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F-77
F-77
TROUBLESHOOTING & REPAIR
POWER BOARD REMOVAL AND REPLACEMENT (continued)
5. Locate the three plug connections. J41, J42 and
J43. See figure F.35.
9. Replace with new power board.
10. Secure the new power board into its proper posi-
tion with the three 3/8” nuts previously removed.
6. Carefully remove the three plugs from the power
board.
11. Replace the three plugs previously removed.
Plugs J41, J42 and J43.
7. Remove the three nuts and at the corners of the
board using a 3/8” nut driver. Board is ready for
removal.
12. Replace the case wraparound cover.
8. Remove the power board.
FIGURE F.35. – POWER BOARD LEAD LOCATION
J43
J42
J41
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F-78
F-78
NOTES
V350-PRO
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F-79
F-79
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the input rectifier for maintenance
or replacement.
MATERIALS NEEDED
3/16” Allen wrench
5/16” Nut Driver
Flathead Screwdriver
Penetrox A-13 Heatsink Compound
Silicon Sealant
This procedure takes approximately 30 minutes to perform.
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F-80
F-80
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER REMOVAL AND REPLACEMENT (continued)
PROCEDURE
6. Remove the six screws from the terminals using a
flathead screwdriver. Carefully note the position of
all leads and their positions upon removal. See
Figure F.37.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case
wraparound cover.
7. Using a 3/16”in. allen wrench remove the two
mounting screws and washers from the input
bridge. See Figure F.37.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
4. Locate the input rectifier. See figure F.36.
8. Remove the input bridge.
5. Carefully remove the silicon sealant insulating the
six input rectifier terminals.
FIGURE F.36. – INPUT RECTIFIER LOCATION
INPUT
RECTIFIER
A AMPS
V VOL
TS
A
CC
CC
T
OUTPUT
-S
-S
T
IC
IC
K
WELD
7
6
018
T
T
K
ERM
IN
IG
G
T
010
A
ALS
W
CV
CV
-WIR
E
-F
HOT
S
LUX
SELECT
C
ORED
T
AR
4
T
5
3
SELECT
6
ARC
2
W
ARNING
C
ONTROL
7
1
-2
0
8
-4
0
+2
REMOTE
-6
9
10
+4
-8
+6
+8
-10
SOFT
+10
CRISP
POWER
ON
V350-PRO
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F-81
F-81
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER REMOVAL AND REPLACEMENT (continued)
9. Apply a thin coat of Penetrox A-13 heatsink com-
pound to the point of contact between the input
rectifier and the mounting surface.
11. Reconnect the previously removed leads to their
proper locations. Torque to 31 inch pounds.
12. Cover the input rectifier and its six terminals with
silicon sealant.
10. Secure the new input bridge into its proper posi-
tion with the two 3/16”in. allen mounting screws
previously removed. Torque to 44 inch pounds.
13. Replace the case wraparound cover.
FIGURE F.37. – INPUT RECTIFIER (CLOSE-UP)
Small Lead "H1"
To Auxiliary Transformer
3/16" ALLEN
BOLTS
C
B
#207
#207A
A
#209
Small Lead "A"
To Circuit Breaker
FRONT
REAR
V350-PRO
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F-82
F-82
NOTES
V350-PRO
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F-83
F-83
TROUBLESHOOTING & REPAIR
OUTPUT RECTIFIER MODULES REMOVAL AND
REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the output rectifier modules for
maintenance or replacement.
MATERIALS NEEDED
3/16” Allen wrench
9/64” Allen wrench
5/16” Nut Driver
7/16” Wrench
Flathead Screwdriver
Penetrox A-13 Heatsink Compound
Thin Knife/Screwdriver
This procedure takes approximately 30 minutes to perform.
V350-PRO
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F-84
F-84
TROUBLESHOOTING & REPAIR
OUTPUT RECTIFIER MODULES
REMOVAL AND REPLACEMENT (continued)
PROCEDURE
5. Before the output rectifier modules can be
reached, the Snubber Board Removal
Procedure must be performed.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
6. After the snubber board is removed, remove the
four leads connected to the modules using a 3/16”
allen wrench. These leads are #X4, #X2, #20, #40.
Note their positions for reassembly. See Figure
F.39.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
4. Locate the output diode modules located behind
the snubber board. See figure F.38.
7. Remove the copper plates from the tops of the
modules.
FIGURE F.38. – OUTPUT RECTIFIER MODULE LEAD LOCATIONS
Output Diode
Modules
Snubber
Board
LEFT SIDE
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F-85
F-85
TROUBLESHOOTING & REPAIR
OUTPUT RECTIFIER MODULES
REMOVAL AND REPLACEMENT (continued)
8. Under the copper plate previously removed, there
is an allen bolt. Remove it using a 9/64” allen
wrench. See Figure F.39.
13. The screw threads may catch on the threads of
the heat sink, so be sure to get the face of the
screw into contact with the surface of the module
(using just hand torque).
9. Using a 7/16” socket remove the mounting bolts at
the top and bottom of the modules. See Figure
F.39.
14. Using a 7/16” socket, tighten each mounting bolt
to between 5 and 10 inch pounds.
10. The output rectifier modules are ready for removal
and/or replacement.
15 Tighten the center allen screw to between 12 and
18 inch pounds.
11. Before replacing the diode module, apply a thin
even coat of Penetrox A-13 heatsink compound
to the bottom surface of the diode module. Note:
Keep the compound away from the mounting
holes.
16. Tighten each mounting bolt again (30 to 40 inch
pounds this time).
15. Replace leads #X2, #X4, #20, #40 to their original
terminals in their proper positions. Torque bolts to
30-40 Inch Pounds.
12. Press the module firmly against the sink while
aligning the mounting holes. Insert each outer
screw through a spring washer and then a plain
washer and into the holes. Start threading all
three screws into the heat sink (2 or 3 turns by
hand).
16. Perform the Snubber Board Replacement
Procedure detailed earlier in this section.
17. Replace the case wraparound cover.
FIGURE F.39. – OUTPUT RECTIFIER MODULE MOUNTING BOLT LOCATIONS
Mounting
Bolts
40 20
X4
X2
3/16" Allen
Bolts
9/64" Allen
Bolts
Mounting
Bolts
V350-PRO
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F-86
F-86
NOTES
V350-PRO
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F-87
F-87
TROUBLESHOOTING & REPAIR
CURRENT TRANSDUCER REMOVAL AND REPLACEMENT
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the current transducer for
maintenance or replacement.
MATERIALS NEEDED
5/16” Nut Driver
1/4” Nut Driver
1/2” Nut driver
3/8” Nut Driver
Channel Locks
Flathead Screwdriver
Phillips Head Screwdriver
Hammer
Crescent Wrench
Pliers
This procedure takes approximately 45 minutes to perform.
V350-PRO
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F-88
F-88
TROUBLESHOOTING & REPAIR
CURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
4. Using a 5/16” nut driver remove the four screws
PROCEDURE
from the bottom and right side of the rear assem-
bly. See Figure F.40.
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-
around cover.
3. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
FIGURE F.40. – CASE BACK SCREW LOCATIONS
REAR
OFF
OFF
OFF
Plastic
Nut
5/16" Mounting Screws
V350-PRO
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F-89
F-89
TROUBLESHOOTING & REPAIR
CURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
5. Label and remove the five leads connected to the
reconnect panel. Pliers may be necessary.
9. Using a hammer and a flathead screwdriver, firmly
tap the metal nut from the bottom of one of its ribs.
This tapping will loosen the nut. Note: Be sure to
tap from the bottom so the nut loosens in a counter
clockwise fashion if viewed from the front of the
machine.
6. Label and remove the two leads connected to the
CB2 circuit breaker.
7. Using a crescent wrench, remove the large plastic
nut from around the input power line located at bot-
tom of the rear assembly. See Figure F.41.
10. Using a 3/8” nut driver label and remove leads
#202, #203, #206, #207A from the reconnect
switches. See Figure F.41.
8. Locate the steel nut located directly on the other
side of the rear assembly behind the plastic nut
that was previously removed. See Figure F.41.
FIGURE F.41. LEAD LOCATIONS
#206
#202
#207A
#203
A AMPS
V VOL
TS
A
OUTPUT
LINCOLN
WELD TERMINALS
ELECTRIC
SELECT
WA
INVER
R
NING
TEC V350-PR
O
ON
V350-PRO
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F-90
F-90
TROUBLESHOOTING & REPAIR
CURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
11. The back of the machine may now gently be
pulled away to gain access to the current trans-
ducer. Note: The rear of the machine cannot be
removed completely.
16. Using a 3/8” wrench, remove the three mounting
screws from the output diode heatsink assembly.
Take note placement of insulation for reassembly.
See Figure F.42.
12. Carefully swing the rear of the machine open to
the left while facing the rear of the machine.
17. Cut any necessary cable ties and carefully remove
the heavy lead from the diode heatsink using a
1/2” nut driver.
13. Perform the Snubber Board Removal
Procedure.
18. Remove the output diode heatsink assembly
through the rear of the machine.
14. Remove leads #X2 and #20 from the output diode
module.
19. Remove plug #J90 from the current transducer.
15. Remove leads #X4 and #40 from the other output
diode module.
20. Using a 3/8” nut driver, remove the two mounting
nuts from the current transducer.
FIGURE F.42– OUTPUT HEATSINK MOUNTING SCREW LOCATION
3/8"
MOUNTING
BOLTS
V350-PRO
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F-91
F-91
TROUBLESHOOTING & REPAIR
CURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
21. Replace the current transducer.
30. Using a 3/8” wrench, replace leads #202, #203,
#206, and #207A previously removed from the
reconnect switches.
22. Replace the two 3/8” mounting nuts previously
removed.
31. Tighten the metal nut previously removed from the
inside of the rear wall on the back of the machine.
Channel locks may be necessary.
23. Reconnect plug #J90 to the current transducer.
24. Replace any necessary cable ties previously cut.
32. Replace the large plastic nut from around input
power line located at the back of the machine.
25. From the rear of the machine, replace the heavy
flex lead to the bottom of the output diode
heatsink assembly using a 1/2” wrench. Note:
Don’t forget to include all washers.
33. Replace the five leads to the reconnect panel in
their proper locations.
26. Replace the output diode heatsink assembly pre-
viously removed using a 3/8” wrench.
34. Replace the two CB2 circuit breaker leads previ-
ously removed.
Note: Be sure to place insulation in its original
35. Using a 5/16” nut driver, replace the four screws
at the bottom and right side of the rear assembly.
location.
27. Replace leads X2, #20, X4, # 40 previously
removed from the two output diode modules.
Torque to 30-40 inch lbs.
36. Replace the case wraparound cover.
37. Perform the Voltage and Current Calibration
Procedure.
28. Perform the Snubber Board Replacement
Procedure.
29. The rear of the machine may now be placed back
into its original position.
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F-92
F-92
TROUBLESHOOTING AND REPAIR
RETEST AFTER REPAIR
Retest a machine:
If it is rejected under test for any reason that requires you to remove any part which could affect the
machine’s electrical characteristics.
If you repair or replace any electrical components:
Press and hold the MODE SELECT button (or the MEMORY button if an advanced process panel is
installed) while applying power to the machine. Rotate the output control knob until the display reads
SPIdIAG. Release the MODE SELECT button.
Expected Results
Lft.display Rt.display
Test
Steps
Required Action
1
oCP
HI
Adjust the output control potentiometer to its highest
setting (completely clockwise).
2
Adjust the output control potentiometer to its lowest
setting (completely counterclockwise).
oCP
Lo
NOTE: If a standard Mode Select Panel is not installed in the machine, skip steps 3-12
3
4
5
6
7
Adjust the hot start potentiometer to its highest setting.
Adjust the hot start potentiometer to its lowest setting.
Adjust the arc control potentiometer to its highest setting.
Adjust the arc control potentiometer to its lowest setting.
All weld mode indicator LEDs should be off. Press the
weld mode select push button to select the first weld
mode. Only the top weld mode indicator LED should be
on, all others should be off.
HSP
HSP
ACP
ACP
NodE
HI
Lo
HI
Lo
1
8
9
Press the weld mode select push button again to select
the second weld mode. Only the second weld mode
indicator LED should be on, all others should be off.
Press the weld mode select push button again to select
the third weld mode. Only the third weld mode indicator
LED should be on, all others should be off.
Press the weld mode select push button again to select
the fourth weld mode. Only the fourth weld mode indi-
cator LED should be on, all others should be off.
Press the weld mode select push button again to select
the fifth weld mode. Only the bottom weld mode indica-
tor LED should be on, all others should be off.
NodE
2
NodE
NodE
NodE
3
4
5
10
11
12
Press the weld mode select push button again and veri-
fy that all weld mode indicator LEDs are off.
NodE
CLr
The test will automatically advance to step 25
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F-93
F-93
TROUBLESHOOTING AND REPAIR
RETEST AFTER REPAIR
Expected Results
Lft.display Rt.display
Test
Steps
Required Action
NOTE: If an Advanced Process Panel is not installed in the machine, skip steps 13-24
=100
13
Turn the Advanced Process Panel left encoder clockwise
until the value displayed on the Advanced Process Panel
lower left display equals 100. Note that this should require
exactly one revolution of the encoder knob.
LEnc
Turn the Advanced Process Panel left encoder counter-
clockwise until the value displayed on the Advanced
Process Panel lower left display equals zero. Note that
this should require exactly one revolution of the encoder
knob.
14
LEnc
=0
Turn the Advanced Process Panel right encoder clockwise
until the value displayed on the Advanced Process Panel
lower left display equals 100. Note that this should require
exactly one revolution of the encoder knob.
=100
=0
rEnc
rEnc
15
16
Turn the Advanced Process Panel right encoder counter-
clockwise until the value displayed on the Advanced
Process Panel lower left display equals zero. Note that
this should require exactly one revolution of the encoder
knob.
oFF
EorY
17
Press and hold the Advanced Process Panel Memory but-
ton until the right display changes to on.
18
19
20
Release the Advanced Process Panel Memory button.
Press and hold the Advanced Process Panel Select button.
Release the Advanced Process Panel Select button.
EorY
rSEL
rSEL
on
oFF
on
1
Verify that the Advanced Process Panel upper left display
contains the following pattern and that the brightness of
the characters is uniform:
21
dISP
“0123456789ABCDEF”
Press and release the Advanced Process Panel Memory
button to advance to the next step.
22
Verify that the Advanced Process Panel lower left display
contains the following pattern and that the brightness of
the characters is uniform:
dISP
2
“0123456789ABCDEF”
Press and release the Advanced Process Panel Memory
button to advance to the next step.
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F-94
F-94
TROUBLESHOOTING AND REPAIR
RETEST AFTER REPAIR
Expected Results
Lft.display Rt.display
Test
Steps
Required Action
23
dISP
3
Verify that the Advanced Process Panel upper right dis-
play contains the following pattern and that the bright-
ness of the characters is uniform:
“0123456789ABCDEF”
Press and release the Advanced Process Panel
Memory button to advance to the next step.
dISP
4
Verify that the Advanced Process Panel lower right dis-
play contains the following pattern and that the bright-
ness of the characters is uniform:
24
“0123456789ABCDEF”
Press and release the Advanced Process Panel
Memory button to advance to the next step.
SudS
SudS
The weld terminals “ON” and “REMOTE” LEDs should
both be off. Press the weld terminals push button to
select weld terminals (studs) “ON” and verify that the
weld terminals “ON” LED turns on.
on
rE
25
26
Press the weld terminals push button again to select
weld terminals “REMOTE” and verify that the weld ter-
minals “ON” LED turns off and that the weld terminals
“REMOTE” LED turns on.
27
28
Press the weld terminals push button again and verify
that both of the weld terminals LEDs are off.
SudS
LorE
cLr
The “LOCAL” and “REMOTE” workpoint source LEDs
should both be off. Press the workpoint source push
button to select “LOCAL” and verify that the workpoint
source “LOCAL” LED turns on and that the “REMOTE”
workpoint source LED remains off.
LocL
LorE
29
Press the workpoint source pushbutton again to select
workpoint source “REMOTE” and verify that the work-
point source “LOCAL” LED turns off and the workpoint
source “REMOTE” workpoint source LED turns on.
rE
LorE
dcon
cLr
Press the workpoint source pushbutton again and verify
that both workpoint source LEDs are off.
30
31
This will only appear if a potentiometer is already con-
nected to the 6-pin amphenol connector on the front of
the machine. If this message appears, disconnect the
potentiometer from the 6-pin amphenol connector.
6-PIn roCP
con
32
6-PIn roCP
Connect a remote output control potentiometer to the 6-
pin amphenol connector on the front of the machine.
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F-95
F-95
TROUBLESHOOTING AND REPAIR
RETEST AFTER REPAIR
Expected Results
Lft.display Rt.display
Test
Steps
Required Action
6-PIn roCP
HI
33
34
35
Adjust the remote output control potentiometer connect-
ed to the 6-pin amphenol connector to its highest set-
ting.
Lo
6-PIn roCP
6-PIn rIgr
Adjust the remote output control potentiometer connect-
ed to the 6-pin amphenol connector to its lowest set-
ting.
This will only appear if a trigger switch is already con-
nected to the 6-pin amphenol connector on the front of
the machine and the trigger switch is presently on.
Turn the trigger switch connected to the 6-pin amphenol
connector off.
oFF
36
6-PIn Rigr
6-PIn rLgr
dcon
Turn the trigger switch connected to the 6-pin amphenol
connector on.
on
oFF
Turn the trigger switch connected to the 6-pin amphenol
connector off.
37
38
This will only appear if a potentiometer is still connect-
ed to the 6-pin amphenol connector. If this message
appears, disconnect the potentiometer from the 6-pin
amphenol connector.
6-PIn roCP
14-PIn roCP
This will only appear if a potentiometer is already con-
nected to the 14-pin amphenol connector. If this mes-
sage appears, disconnect the potentiometer from the
14-pin amphenol connector.
39
dcon
con
Connect a remote output control potentiometer to the
14-pin amphenol connector.
14-PIn roCP
40
41
Adjust the remote output control potentiometer connect- 14-PIn roCP
ed to the 14-pin amphenol connector to its highest set-
ting.
HI
42
43
14-PIn roCP
Adjust the remote output control potentiometer connect-
ed to the 14-pin amphenol connector to its lowest set-
ting.
Lo
14-PIn rIgr
This will only appear if a trigger switch is already con-
nected to the 14-pin amphenol connector and the trig-
ger switch is presently on. Turn the trigger switch con-
nected to the 14-pin amphenol connector off.
oFF
44
45
Turn the trigger switch connected to the 14-pin amphe- 14-PIn rIgr
nol connector on.
on
Turn the trigger switch connected to the 14-pin amphe-
oFF
14-PIn rIgr
nol connector off.
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F-96
F-96
TROUBLESHOOTING AND REPAIR
RETEST AFTER REPAIR
Expected Results
Lft.display Rt.display
Test
Steps
Required Action
14-pIn roCP
46
dcon
This will only appear if a potentiometer is still connect-
ed to the 14-pin amphenol connector. If this message
appears, disconnect the potentiometer from the 14-pin
amphenol connector.
47
Test steps 21-24 verify the functionality of the gas sole-
noid. If an oscilloscope is available, verify that the cur-
rent flowing through the gas solenoid is zero before the
solenoid is energized, increases to approximately
700mA (pull in current), remains at 700 mA for approxi-
mately 150 msec, and decreases to approximately
200mA (hold current). Press the local/remote pushbut-
ton to turn the gas solenoid on.
GAS
On
< - 150msec - >
700mA
200mA
+------------------------+
+-----....------+
+-------------
0mA- - - - +
Or, the signal can be verified by measuring 12.3 VDC
+/- .5V from lead 553A to 554A (Lead 553A should be
positive)
48
Press the local/remote pushbutton again to turn the gas
solenoid off.
GAS
OFF
After completing all of the above tests, the following will appear on the display.
Verify this message appears for approximately 3 sec-
onds
DIAg
PASS
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G-1
G-1
ELECTRICAL DIAGRAMS
TABLE OF CONTENTS
-ELECTRICAL DIAGRAMS SECTION-
ELECTRICAL DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECTION G
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2
MACHINE SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3
CONTROL PC BOARD SCHEMATIC #1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4
CONTROL PC BOARD SCHEMATIC #2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-5
CONTROL PC BOARD SCHEMATIC #3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6
CONTROL PC BOARD SCHEMATIC #4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7
CONTROL PC BOARD ASSEMBLY (L11088-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *
POWER SUPPLY PC BOARD SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-8
POWER SUPPLY PC BOARD ASSEMBLY (G3632-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *
SWITCH PC BOARD SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-9
SWITCH PC BOARD ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-10
DISPLAY PC BOARD SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-11
DISPLAY PC BOARD ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-12
LED SELECT PC BOARD SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-13
LED SELECT PC BOARD ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-14
LED POTENTIOMETER PC BOARD SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-15
LED POTENTIOMETER PC BOARD ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-16
SPI REMOTE PC BOARD SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-17
SPI REMOTE PC BOARD ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-18
SNUBBER PC BOARD SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-19
SNUBBER PC BOARD ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-20
* NOTE: Many PC Board Assemblies are now totally encapsulated and are therefore considered to be unservice-
able. The Assembly numbers are provided on this page but the actual drawings are no longer included.
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G-2
G-2
ELECTRICAL DIAGRAMS
WIRING DIAGRAM - INVERTEC V350-PRO
WIRING DIAGRAM INVERTEC V350
RIGHT SIDE OF MACHINE
}
INPUT
PER
N.A.
+ C1,C3
3200/300
206
203
208
SWITCH
J20
1
NOTE:
IF ADVANCED PROCESS PANEL IS NOT INSTALLED
SPI FLEX CIRCUIT IS PLUGGED INTO J33.
607
205
615
716
715
611
612
609
602
5
6
7
8
276
5
4
10
9
16
3316
3315
3314
3313
8
7
6
5
4
3
1010
1020
2
3
4
275
277
4
3
2
1
8
7
6
5
209
15
14
13
12
11
10
9
610
1002
1001
1020
J37
605
608
1010
3
2
1
8
J21
3305
3304
3303
616
7
1
2
1
2
3
6
5
4
1001
1002
903
N.D.
J9
6
3312
2
DISPLAY
J22
1
901
804
1
201
207
2
4
204
J33
502
505
J61
J10A J10B
2
1
3
201
3301
4
3
8
7
6
5
J60A
5
J60B
1
3200/300
J333
3313
3316
202
J8
205
2
WELD
TERMINA
LS
4
3
2
1
3304
3312
3315
3303
3
3314
3305
+
R5
2
16
802
806
801
3216
3215
8
7
6
5
4
3
4
5
C2,C4
3207
Pin 3 lead 31B or 31C
Pin 2 lead 32A or 532A
W
10K/2
OUTPUT
CONTROL
1
15
14
13
12
11
10
9
B
3206
16
15
3205
J52
All
Other
Models
6
2
716
715
3213
3212
3211
J7
277
275
3204
3203
276
PRIMARY
RECONNECT
X2
C
O
N
T
R
O
L
3202
20
3
FAN
OR
204
7
FAN
2
1
5
14
1
11
7
16
3201
4A
J332
J331
SPI FLEX CIRCUIT
L1
REACTOR
J52
(Construction)
R
X3
30
208
X1
COM2A
E
M
O
T
203
FAN
6
5
4
3
2
1
12
11
10
9
207A
J1
30
4
2
CHOKE
75
77
76
x x x x x x x
608
616
607
615
8
16
15
14
13
12
11
10
9
13
505
J6
25
10
76A
506
503
J34
554
553
7
6
206
A
E
8
202
251
J61
MAIN
TRANSFORMER
7
MODE
OR
40
5
4
3
2
1
605
610
ADVANCED
PROCESS
AUXILIARY
TRANSFORMER
N.E.
( 380-575VAC POSITION )
X4
L2
REACTOR
254
253
554
553
14
1
612
10
A
CB3
INPUT
BRIDGE
209
611
A
A
3.5A
SPI F
LEX CIRCUIT
602
609
+
_
A
N.C.
TP3
A
B
C
253
D
E
F
TP1
H4
380-
415V
H2
200-
208V
J2
('CE' Model will not contain leads 31A or32)
2
1
4
3
WIRE FEEDER REMOTE
(REAR VIEW)
502
503
251
254
J5
3
4
1
2
207A
207
B
31
31A
31B
41A
or
541A
(construction)
TP2
J3
J4
CONTROL RECTIFIER
6 PIN
REMOTE
_
550-
575V
440-
460V
220-
230V
~
12 11 10
9
3
8
7
1
10
5
9
4
8
3
7
6
C
41
32
32
31A
GND
42
(REAR VIEW )
-
H6
H5
H3
2
41A
10A
X2
6
5
4
2
32A
3.5A
1
X4
OUTPUT
RECTIFIER
H1
A
L
J
66
65
CB1
541
CB2
532
4
2
K
41B
B
D
I
2A
D
41B
2A
66B
21
24
H
C
N
F
SPI FLEX CIRCUIT
E
A
~
M
G
GND
F
C
75A
75
4A
65B
E
B
75A
554
54
77A
553
76A
77A
77
GAS
SOLENOID
20
S
+
40
76
407 410
412
411 408
N
U
B
B
E
R
401
406
405
403
65
402
66
IN PARENTHESIS
COLORS FOR
"CE" MACHINES
21
SNB
1
3
2
5
3
6
2
4
2
8
3
9
4
5
6
1
4
1
7
S1
901A
COLORCODE:
10
11 12
_
10
903A
903B
G(G/Y)
R(B)
B = BLACK
G = GREEN
R = RED
W(N)
B(U)
J42
J43
J41
W
V
U
POWER
901B
903
R1
W = WHITE
U = BLUE
N = BROWN
TP4
TP5
A
B
C
Y = YELLOW
J90
2 3
CURRENT
TRANSDUCER
FRONT VIEW OF MACHINE
1
4
LEGEND
901
ALL MACHINES
OPTION
COMPONENT OUTLINE
N.D. INPUT POWER LINE FILTER IS PRESENT ONLY
ON "CE" MODELS.
NOTES:
N.A. 1. FOR MACHINES WITH RED, BLACK AND WHITE POWER CORDS
LEFT SIDE OF MACHINE
N.B. SINCE COMPONENTS OR CIRCUITRY OF A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING
THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT
COMPONENTS OR CIRCUITRY HAVING A COMMON CODE NUMBER.
FOR SINGLE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRICAL CODE.
CONNECT BLACK AND WHITE LEADS TO SUPPLY CIRCUIT.
WRAP RED LEAD WITH TAPE TO PROVIDE 600V. INSULATION.
FOR THREE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE.
CONNECT BLACK, RED & WHITE LEADS TO SUPPLY CIRCUIT.
2. FOR MACHINES WITH BROWN, BLACK AND BLUE POWER CORDS
FOR SINGLE PHASE INPUT: CONNECT GREEN/YELLOW LEAD TO GROUND PER NATIONAL ELECTRICAL CODE.
CONNECT BLUE AND BROWN LEADS TO SUPPLY CIRCUIT.
WRAP BLACK LEAD WITH TAPE TO PROVIDE 600V. INSULATION.
FOR THREE PHASE INPUT: CONNECT GREEN/YELLOW GROUND PER NATIONAL ELECTRIC CODE.
CONNECT BLUE, BLACK & BROWN LEADS TO SUPPLY CIRCUIT.
N.E. ON "CE" MODELS, MOV's ARE IN THE INPUT POWER
LINE FILTER.
J2,J5,J11,
J22, J41,
N.C. PLACE "A" LEAD ON APPROPRIATE CONNECTION FOR INPUT VOLTAGE.
CONNECTION SHOWN IS FOR 550-575V OPERATION. (CE MODELS ONLY GO TO 440VAC.)
J1,J6,J7, P52,
J332, J333
J31,J33,
J34,J37
J8,
J20,J21
J60
J4
J43, J331
J10A,
J10B
1
J311, P55
2
J9, J42, P53
3
1
6
1
8
5
4
1
6
1
1
7
1
1
5
TOP CENTER
PANEL
J61
8
9
16
10
3
4
5
12
4
6
BASE
CASE FRONT
FAN SHROUD
2
15
1
PROTECTIVE BONDING CIRCUIT
ELECTRICAL SYMBOLS PER E1537
CONNECTORCAVITY NUMBERING SEQUENCE
(VIEWED FROMCOMPONENT SIDE OF BOARD)
1-25-2002
G4082
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The wiring diagram specific to your code is pasted inside one of the enclosure panels of your machine.
V350-PRO
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G-3
G-3
Enhanced Diagram
ELECTRICAL DIAGRAMS
SCHEMATIC - COMPLETE MACHINE
+15
SWITCH BOARD
209
609
602
J20-4
J20-8
MAIN
INPUT
RELAY
CR1
CONTROL BOARD
+15V
MAIN RELAY CONTROL
VOLTAGE / FREQUENCY CONVERTER #1 (+)
VOLTAGE / FREQUENCY CONVERTER #1 (-)
PRIMARY CURRENT SENSE #1 (-)
PRIMARY CURRENT SENSE #1 (+)
J6-9
J6-2
J6-16
J6-8
J10A-1
609
602
616
608
1001
1002
RECONNECT SWITCH
CR1
205
206
N.C.
N.B.
SNUBBER
BOARD
J10A-2
4200 uF
J21-6 616
-
-
V/F CONVERTER # 1
REACTOR
J21-2
J21-1
J21-5
608
J8-1
OUTPUT
DIODES
CURRENT FEEDBACK ( 4V=500A )
+15V
-15V
CONTROL BOARD COMMON
I OUT
+15V
-15V J90-2
801
801
802
804
806
J90-3
J90-1
INPUT SWITCH
1001
1002
802
804
806
J8-2
J8-4
J8-6
4200 uF
H1
GND J90-4
AC3
AC2
AC1
POS
NEG
L1
W
WHITE
(BROWN)
C
B
A
POSITIVE
J60-A, J60-B
203
202
J9-1
J9-3
(+) STUD VOLTAGE SENSE
(-) STUD VOLTAGE SENSE
208
204
901
903
+
TP3
TP2
901B
INPUT
LINES
L2
901A
V
RED
(BLACK)
CURRENT
TRANSDUCER
C1/TP1
.05uF
600V
320V
160J
R1
5
1
TP1
L3
S1
U
BLACK
(BLUE)
TP3
150V
80J
21
MAIN CHOKE
x x x x x x x
L3
4200 uF
J61
G
GREEN
(GREEN/YELLOW)
903A
-
A
J21-7
605
610
NEGATIVE
903B
V/F CONVERTER # 2
-
1
15
3.5A CB3
GND
J21-3
THERMOSTAT
C2/TP2
.05uF
600V
320V
160J
J21-4
J21-8
4200 uF
REACTOR
506
Dashed lines represent
copper bus connections.
CE COLORS IN
PARANTHESYS
503
-
J1,J6,J7, J332, J333, P52
207
B1
8
1
506
505
SNB
201
Shown connected for
200 - 240 Volt Input Voltage
+15
1010
503
502
THERMOSTAT
THERMOSTAT
J5-3
J5-2
1020
9
16
SOFT
START
J31,J33,
J34,J37
(+)
1
(-)
5
505
502
AUXILIARY
TRANSFORMER
605
610
1010
1020
611
612
615
607
715
716
J6-5
VOLTAGE / FREQUENCY CONVERTER #2 (+)
VOLTAGE / FREQUENCY CONVERTER #2 (-)
PRIMARY CURRENT SENSE #2 (-)
PRIMARY CURRENT SENSE #2 (+)
GND (a)
SOFT START CONTROL
PULSE TRANSFORMER GATE DRIVE
J6-10
J10B-1
J10B-2
J6-11
J6-12
J6-15
J6-7
J7-15
6
10
J2,J5,J11,
J22,J41,
J311,P55
611
FAN
615
607
716
612
115 VAC
715
FAN
FAN
PULSE TRANSFORMER GATE DRIVE
+ 15 (a)
FAN CONTROL
2
1
J7-16
CONSTRUCTION MODELS DO NOT HAVE CB1, CB2
4
3
OR REMOTE, LEAD 532 GOES TO J22 AND LEAD 541
GOES TO THE CONTROL RECTIFIER IN THE
CONSTRUCTION MODEL.
J4-7
J4-12
J9,J42,P53
407
412
407
412
J42-4
J42-1
POWERDOWN SIGNAL (HIGH=RUN)
+15V (a)
POWER DOWN SIGNAL
+15 (a)
31B
POWER
BOARD
1
3
MACHINE
J4-8
+5 (a) J42-3
408
410
411
408
410
411
+5V (a)
GND (a)
-15V (a)
CONTROL
POWER
SUPPLY
32A
4
6
J4-10
J4-11
GND (a)
-15 (a)
J42-5
J42-2
J8,J20, J21
4
1
54
65B
+5 SPI (b)
+15 SPI (b)
SPI GND (b)
J4-3
J4-2
403
403
402
+5V SPI (b)
J43-3
J43-6
J43-12
541
6A
532
65
J41-2
+40 VDC
J41-1
SPI
POWER
SUPPLY
402
401
406
+15V SPI (b)
CB1
CB2
5
8
J4, J43, J331
3.5A
41A
66
401
406
J4-1
J4-6
GND SPI (b)
+5V RS232 (e)
41
+5 RS232 (e) J43-4
GND (e) J43-9
32
6
32A
1
RS232
SUPPLY
66B
405
405
J4-5
GND (e)
41A
7
12
31B
+20 (c) J43-8
J10A,
J10B
CHOPPER
POWER
SUPPLY
GND (c)
+20 (d)
J43-2
J43-7
J43-1
1
GND (d)
2
76A
4
76
24
75A
SPI CIRCUIT
SPI CIRCUIT
SPI CIRCUIT
2 77 553
77
4A 75
554
41
21
76A
(+)15 VOLT SPI
(+)5 VOLT SPI
/SS
J3-1
J3-2
42
CONNECTOR CAVITY NUMBERING SEQUENCE
(VIEWED FROM COMPONENT SIDE OF BOARD)
N.D.
N.D.
F
H
J3-3
J3-4
J3-5
J3-6
J3-7
J3-8
J3-9
G
J333-16
J333-15
J333-14
J333-13
J333-12
3316
3315
3314
3313
4
F
E
E
D
A
B
I
76
N
CS1
M
J
31
32
LEGEND
77A
K
CS2
N.D.
CS3
L
ALL MACHINES
OPTION
+15V
+15V
+15V
2
D
A
3312
+15V
+15V
B
COMPONENT OUTLINE
J60B-1
J60A-1
C
3313
3303
+15V
LOCAL
+15V
J333-8
J333-7
J333-6
J333-5
J333-4
J333-3
J333-2
J333-1
75A
276
275
277
3305
3304
3303
C
REMOTE
MISO
ON
J60B-2
J60B-3
J60A-2
J60A-3
3316
3314
3315
3312
AMPS
VOLTS
R5
10K/2W
REMOTE
+15V
4A
J2-1
251
253
254
SCK
6 PIN REMOTE
2B 2A
75
J2-3
MOSI
J60A-4
J60B-4
3305
3304
DISPLAY PANEL
J3-10
GROUND SPI
J2-4
276
277 275
WELD TERMINALS
OUTPUT CONTROL
WIRE FEEDER REMOTE
NOTES :
SPI
CIRCUIT
+10 Volts
N.A. PC BOARD COMPONENTS SHOWN FOR REFERENCE
ONLY. ALL COMPONENTS ARE NOT SHOWN.
N.B. INPUT POWER LINE FILTER IS PRESENT ONLY
ON "CE" MODELS.
J332-16
J332-15
J332-14
3216
3215
AMPHENOLS ARE VIEWED FROM FRONT OF MACHINE
OR
+15V
LED 1
J61-4
J332-13
J332-12
J332-11
J332-7
J332-6
J332-5
J332-4
J332-3
J332-2
J332-1
3213
3212
3211
3207
3206
3205
3204
3203
3202
3201
3212
3206
3204
+10V
J61-3
LED 2
3207
13
J61-14
J61-12
N.C. ON "CE" MODELS, MOV's ARE IN THE INPUT POWER
LINE FILTER.
N.D.
25
14
+15V
+15V
+15V
+15V
ELECTRICAL SYMBOLS PER E1537
graphical representation
of potentiometer connection
J61-2
LED 3
554
3202
3201
3216
3215
HOT
START
+10V
+10V
ARC
CONTROL
+15V
N.D. THE SPI CIRCUIT PIN ASSIGNMENTS ARE SHOWN AT
THE CONTROL PCB. THIS PIN ASSIGNMENT IS THE SAME
FOR ALL THE SPI CONNECTORS.
251
GAS SOLENOID
J61-1
LED 4
J61-5
J61-13
J61-15
3213
REMOTE BOARD
MODE
SWITCH
254
253
J61-6
LED 5
3215
3213
553
1
ADVANCED PROCESS PANEL
MODE PANEL
J61-7
B
G4093
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-4
G-4
ELECTRICAL DIAGRAMS
SCHEMATIC - DIGITAL CONTROL PC BOARD #1
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-5
G-5
ELECTRICAL DIAGRAMS
SCHEMATIC - DIGITAL CONTROL PC BOARD #2
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-6
G-6
ELECTRICAL DIAGRAMS
SCHEMATIC - DIGITAL CONTROL PC BOARD #3
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-7
G-7
ELECTRICAL DIAGRAMS
SCHEMATIC - DIGITAL CONTROL PC BOARD #4
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-8
G-8
ELECTRICAL DIAGRAMS
SCHEMATIC - POWER SUPPLY PRINTED CIRCUIT BOARD
+5V
Machine Control Power Supply
R50
.13
J42
D18
3
1
2
6A
200V
+
t
D4
6A
200V
60V
LED2
10
T1
+5Volts, .750 Amp
C43
100
16V
C41
100
16V
C39
0.1
50V
T1
C12
33.2
33.2
10-55 VDC
Operation
.0015
2000V
332
3
Vref
1
R9
10.0K
10.0K
10.0K
11
12
D22
10.0
1.0A
30V
R60
10.0
D
S
+15Volts
Q1
21A
200V
G
R61
10.0
.750 Amp
D24
C13
1
200V
7
6
VCC
OUT
1
5
Vref
1
J41
8
4
5
2
J42
D3
1A
600V
VREF
RT/CT
GND
VFB
D19
DZ8
18V
3W
Vfb1
OCI1
2
X8
1
DC Input (+)
1
IN
OUT
CNY17-3
COMP
CS
3A
600V
R10
R5
3
100K
100K
2
6
4
J41
4
X5
Vfb1
ADJ
9
+
t
7
D21
1.0A
30V
C11
22
35V
C14
0.1
50V
C47
1.0
35V
R55
R52
221K
1.21K
.33W
T1
1.82K
T1
OV1
475
Machine Control
Shut Down
4
6
C45
150p
100V
C7
0.1
50V
C6
4.7
35V
R39
R12
5.62K
Capacitor
56.2K
C8
820p
50V
3W
0.05
C42
R13
C32
2700p
50V
10p
100V
10.0K
J41
3
1
J41
8
X1
GND
1
5
REF
DC Input (-)
TL431
6
C44
0.1
50V
C38
4.7
35V
C40
1.0
35V
-15Volts, .100Amp
T1
1.21K
.33W
5
J42
J42
8
ADJ
J42
2
IN
OUT
DZ1
24V
3W
6
X9
14
D8
1A
600V
gnd_mcps
T2
+5V
Operation
1
D25
1.00K
Undervoltage
C31
.0015
2000V
30-55 VDC
Detect
D2
1A
D23
5
1
<30VDC
600V
1.0A
30V
OCI2
CNY17-3
D10
X3
D
Q2
21A
200V
J42
4
6
2
J43
G
4
7
6
VCC
OUT
R32
15.0
6
S
IN
OUT
Vref
2
8
4
5
2
VREF
RT/CT
GND
VFB
D9
1A
600V
DZ2
27V
.5W
C49
.022
R34
221K
DZ7
18V
3W
1
COMP
CS
R31
75K
Vfb2
ADJ
3
3
C53
.1
R29
X4
C27
C23
1.0
35V
100K
C25
0.1
50V
OV2
C24
4.7
35V
C26
1
200V
1.21K
.33W
T2
12
150p
100V
D20
1.0A
30V
C52
150p
DZ3
27V
.5W
15Volts, .250Amps
SPI
gnd_mcps
C2
0.1
50V
C3
4.7
35V
R38
R28
5.62K
56.2K
C4
820p
50V
3W
0.05
Overvoltage
Shutdown
> 55 VDC
C28
10p
100V
249
J43
R40
3
+
t
D16
16A
200V
.13
60V
OV2
OV1
LED1
2
+5Volts, 3 Amps
SPI
D14
D17
C37
100
16V
C36
100
16V
C35
100
16V
C34
0.1
50V
T2
13
150
.33W
150
.33W
150
.33W
D13
Vref
2
332
DZ4
3.3V
3W
C33
4.7
35V
15
J43
D15
X7
5
IN
OUT
1A
600V
4
1
5
GND
J43
OCI3
CNY17-3
R17
C5
0.1
50V
C1
4.7
35V
C30
1.0
35V
+5Volts, .100 Amp
CAN
8
150
.33W
T2
11
+
t
D7
1A
2
6
4
.24
Vfb2
6
600V
J43
+20Volts
.200 Amps
Gate Drive
475K
R21
10
C21
C17
4.7
35V
C18
4.7
35V
T2
9
0.1
2.49K
.33W
50V
C46
150p
100V
J43
D12
2
1.82K
C16
R22
J43
R24
.24
2700p
50V
10.0K
7
J43
D1
+
t
D6
1A
X6
4
1
IN
OUT
7
600V
1A
600V
8
X2
5
+20Volts
.200 Amps
Gate Drive
GND
REF
TL431
6
C22
0.1
50V
C20
4.7
35V
C19
4.7
35V
T2
8
C9
0.1
50V
2.49K
.33W
C10
4.7
35V
C29
1.0
35V
+5Volts, .100 Amp
RS232
T2
10
150
.33W
J43
11
J43
J43
J43
9
1
12
FILENAME: G3631-2D2
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
LAST NO. USED
R-
C-
D-
CAPACITORS =
MFD
(
.022/50V
UNLESS OTHERWISE SPECIFIED)
NOTES :
N.A. SINCE COMPONENTS OR CIRCUITRY ON
LABELS
RESISTORS = Ohms (
1/4W UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
A
PRINTED CIRCUIT BOARD MAY CHANGE
DIODES =
1A, 400V
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING
NUMBER.
A
COMMON CODE
FRAME CONNECTION
EARTH GROUND CONNECTION
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
"X" INFO.
Chg. Sheet No.
6-2-2000A
DESIGN INFORMATION
REFERENCE:
MANUFACTURING TOLERANCE PER E2056
EQUIPMENT TYPE:
Digital Systems
Schematic, Digital Power Supply
ON
ON
2
3
PLACE DECIMALS IS .02
PLACE DECIMALS IS .002
DRAWN BY: JP\TK
ON ALL ANGLES IS .5 OF
A
DEGREE
10-27-2000E
SUBJECT:
MATERIAL TOLERANCE (" ") TO AGREE
ENGINEER:
SUPERSEDING:
t
WITH PUBLISHED STANDARDS.
DATE:11-30-98
DRAWING No.:
APPROVED:
SCALE:NONE
3631
G
DO NOT SCALE THIS DRAWING
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-9
G-9
ELECTRICAL DIAGRAMS
SCHEMATIC - SWITCH PRINTED CIRCUIT BOARD
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-10
G-10
ELECTRICAL DIAGRAMS
PC BOARD ASSEMBLY-SWITCH
ITEM
REQ'D
PART NO.
S20500-4
DESCRIPTION
C1,C23
C2,C24
C3,C18
C4,C21
2
2
2
2
4
8
CAPACITOR,PPMF,.0047,1000V,BOX
CAPACITOR,PPMF,.047,1600V,BOX,10%
CAPACITOR,TAEL,27,35V,10%
S20500-7
S13490-93
S20500-1
S16668-6
S16668-5
CAPACITOR,PPMF,0.1,1000V,10%,BOX
CAPACITOR,CEMO,4700p,50V,10%
CAPACITOR,CEMO,.022, 50V,20%
C5,C6,C15,C16
C7,C12,C13,C14,C20,C27,C28
C29
C8,C9,C22
3
2
2
2
2
4
9
S16668-9
S13490-85
T11577-57
S16668-7
S14293-18
T12705-59
T12199-1
CAPACITOR,CEMO,150p, 100V,5%
CAPACITOR,PCF,.027,50V,5%
CAPACITOR,PEF,0.1,400V,10%
CAPACITOR,CEMO,820p,50V,5%
RELAY,DPST,12VDC,AG-CDO
DIODE,AXLDS,3A,600V,UFR
DIODE,AXLDS,1A,400V
C10,C11
C25,C26
C31,C32
CR1,CR2
11.00 .04
N.E., N.F.
D1,D4,D16,D17
D7,D8,D9,D12,D14,D18,D19
D20,D21
R2
R1
R126
R127
J21
6
7
DZ1,DZ2,DZ3,DZ5,DZ6,DZ15
DZ16,DZ18,DZ19,DZ23
DZ4,DZ7,DZ17,DZ20
DZ8
10
T12702-29
ZENER DIODE, 1W,15V,5% 1N4744A
1
2
1
2
R122
DZ22
R83
DZ11
.275
.285
R .045
R123
C22
R37
C9
4
1
T12702-40
T12702-19
T12702-45
T12702-4
S24016-8
S24016-4
S15000-22
S15000-29
T12704-75
T12704-73
T14648-5
ZENER DIODE, 1W,6.2V,5% 1N4735A
ZENER DIODE, 1W,12V,5% 1N4742A
ZENER DIODE, 1W,18V,5% 1N4746A
ZENER DIODE, 1W,20V,5% 1N4747A
CONNECTOR,MOLEX,MINI,PCB,RT-L,8-PIN
CONNECTOR,MOLEX,MINI,PCB,RT-L,4-PIN
OPTOCOUPLER,PHOTO-Q,70V,CNY17-3/VDE
OPTOCOUPLER,TRIAC,DRV,RANDOM,600V
TRANSISTOR,NMF,T247,4A,900V(SS)
MOSFET,4-PIN DIP,1A,100V,RFD110(SS)
RESISTOR,WW,5W,3.3K,5%,SQ
X1
X4
OCI3
MAX.
.105
CRIMP
HEIGHT
C3
C18
R65
OCI2
DZ9,DZ10,DZ12,DZ13
DZ11,DZ22
4
R135
R72
D21
2
C32
R39
R38
NON-COMPONENT
SIDE
J20,J21
2
5
X2
J22
1
EYELET DETAIL
R15
OCI1,OCI2,OCI3
OCI4
3
B203
B207
R19
C5
N.L.
C12
R41
R99
1
N.L.
N.C.
R43
D9
R20
R93
C15
Q1
1
N.A.
R78
B218
B211
DZ9
R97
N.A. Q2,Q3,Q4,Q5
R1,R2,R3,R4,R7,R8,R9,R10
4
16
B213
B217
R124,R125,R126,R127,R130
R131,R132,R133
R5,R6,R19,R26,R93,R105
R109,R128,R129
R11,R12,R30,R31,R142
R13,R39,R43,R60,R81,R92
R14,R107
D1
D16
N.D.
C31
R35
R60
C1
C23
9
S19400-1001
RESISTOR,MF,1/4W,1.00K,1%
C13
C20
R5
R128
DZ23
R129
DZ1
R6
5
6
S19400-1503
S19400-3321
S19400-1652
S19400-10R0
RESISTOR,MF,1/4W,150K,1%
RESISTOR,MF,1/4W,3.32K,1%
RESISTOR,MF,1/4W,16.5K,1%
RESISTOR,MF,1/4W,10.0,1%
C2
C24
X3
2
R82
R53
R15,R20,R21,R22,R27,R28
R97,R98,R99,R100,R101,R106
R32,R33,R34,R48,R49,R50
R51,R62,R63,R74,R75,R85
R86,R87,R134,R135
R35,R52,R73,R84
R36,R37,R123
R38,R40,R42,R45,R53,R59
R66,R69,R70,R72,R80,R82
R41,R67
12
B216
B212
R52
MANUFACTURED AS:
G3830-1DO
20
B205
B204
R22
R69
16
S19400-1003
RESISTOR,MF,1/4W,100K,1%
R70
20
20
R26
C6
DZ13
3
D4
D17
R142
R106
R27
N.B., N.G., N.J.
(5 PLACES)
R105
C16
B206
B202
4
3
S19400-6191
S19400-2213
S19400-1002
RESISTOR,MF,1/4W,6.19K,1%
RESISTOR,MF,1/4W,221K,1%
RESISTOR,MF,1/4W,10.0K,1%
1
R101
IDENTIFICATION CODE
12
PART NO.
R133
R130
2
2
2
2
4
2
2
2
3
1
1
1
1
1
1
1
2
2
S19400-4752
T12300-79
RESISTOR,MF,1/4W,47.5K ,1%
RESISTOR,WW, 1W,1.0,1%
RESISTOR,MF,1/4W,33.2K,1%
RESISTOR,MF,1/4W,200,1%
RESISTOR,WW,10W,100,5%
RESISTOR,MF,1/4W,8.25K,1%
RESISTOR,MF,1/4W,2.00K,1%
TRIMMER,MT,1/2W,10K, 10%,LINEAR
RESISTOR,MF,1/4W,100,1%
RESISTOR,MF,1/4W,357,1%
RESISTOR,MF,1/4W,150,1%
RESISTOR,MF,1/4W,475,1%
RESISTOR,MF,1/4W,39.2,1%
TRANSFORMER,PCB;
R8
R9
R131
R132
R44,R68
R46,R76
S19400-3322
S19400-2000
S24376-3
R7
R10
N.N.
TRI1
NOTES:
R47,R64
R11
N.A. CAUTION: THIS DEVICE IS SUBJECT TO DAMAGE BY
STATIC ELECTRICITY. LINCOLN ELECTRIC TO SEE E2454
BEFORE HANDLING.
N.B. SNAP POWER TERMINALS INTO COMPONENT SIDE OF BOARD.
N.C. UNLESS OTHERWISE SPECIFIED, THESE AREAS TO BE COVERED ON
BOTH SIDES OF BOARD (WHERE POSSIBLE) WITH SEALANT PRIOR TO
E NCAPSULATION.
N.D. INJECT SEALANT ITEM 8 THROUGH THE PC BOARD HOLES (16 HOLES)
TO SEAL MODULE LEADS. CAVITY BETWEEN BOARD AND MODULE TO BE
COMPLETELY FILLED WITH ITEM 8 SEALANT MATERIAL AS PER
APPROPRIATE MANUFACTURING WORK INSTRUCTIONS. COVER ALL
MODULE LEADS THAT PROTRUDE FROM THE NON-MODULE SIDE OF THE
BOARD WITH ITEM 8 SEALANT.
N.E. FEMALE EYELET TO BE AGAINST THE NON-COMPONENT SIDE AS SHOWN
EYELET MUST NOT SPIN AFTER CLINCHING.
N.F. SOLDER EYELET SO THAT SOLDER COVERS ENTIRE EYELET
AND ALL AROUND EYELET ON COPPER SIDE ONLY.
NO ICICLES OR SOLDER BLOBS PERMITTED.
N.G. AFTER SOLDERING, INSPECT POWER TERMINAL CONNECTIONS PER E1880.
N.H. THIS AREA TO BE COVERED ON COMPONENT SIDE OF BOARD WITH SEALANT
PRIOR TO ENCAPSULATION. MATERIAL MUST BE APPLIED FROM TOP TO
COMPLETELY FILL TO UNDERSIDE OF DEVICE. THEN APPLY SEALANT AROUND
BASE OF DEVICE.
N.J. THIS AREA TO BE COVERED ON OPPOSITE COMPONENT SIDE OF BOARD WITH
ITEM 8 PRIOR TO ENCAPSULATION. DO NOT COAT WITH ENCAPSULATION
MATERIAL ON THE TOP SURFACES NOR THE THREADS.
R55,R56,R57,R58
R61,R77
S19400-8251
S19400-2001
S16296-5
J22
B209
R65,R120
T1
R138
R140
R139
N.H.
R78,R79
R137
OCI1
CR2
R83,R122,R141
R137
S19400-1000
S19400-3570
S19400-1500
S19400-4750
S19400-39R2
S13000-46
CR1
C25
R138
J20
C26
R139
R140
0
T1
TP1
T13640-24
MOV,175VRMS,120J,20MM
0
9.00 .04
TRI1
S15161-27
TRIAC,T220,8A,800V
X1,X4
S15128-10
VOLTAGE REF,ADJ, PRECISION,431I
OP-AMP,QUAD, HIGH-PERF,33074
X2,X3
S15128-18
ITEM PART NO.
DESCRIPTION
QTY
P.C. BOARD BLANK
1
SEE DETAIL
M16100-44
S23006
1
N.A.,N.M.,N.P.
ELECTRONIC MODULE (A1, A2)
TERMINAL (B211,B218,B204,B205,B209)
CURRENT TRANSDUCER (T2, T3)
POWER TERMINAL (B201, B208)
EYELET-FEMALE
2
3
4
5
6
7
8
2
N.K.
5
CAPACITORS = MFD/VOLTS
INDUCTANCE = HENRIES
RESISTOR = OHMS
M19612
2
N.K. SEALANT HEIGHT BETWEEN MODULES NOT TO EXCEED .17” MAX.
N.L. ITEM 5 MUST HAVE FULL CONTACT WITH ITEM 3 ON THE CONTACT SURFACE.
N.M. THE TWO MODULES, ITEM 2 MUST BE MATCHED. THE LAST TWO DIGITS OF THEIR
SORT CODES MUST BE IDENTICAL.
N.N. SMALL PC BOARD HOLES TO BE FREE OF ENCAPSULATION MATERIAL FOR A
CEN TERED .40 MINIMUM DIAMETER AND .45 MAXIMUM DIAMETER (4 HOLES). TO BE
CENTERED WITHIN .06 (DO NOT GET ON MATING SURFACES). MASK PER
APPROPRIATE MANUFACTURING WORK INSTRUCTIONS.
S24866
T9147-11
T9147-15
E2861
2
8
2
EYELET-MALE
8
N.M.
SEALANT
5.0oz
SCHEMATIC REFERENCE L11487-1D0
N.P. ELECTRONIC MODULES TO BE ASSEMBLED AND ENCAPSULATED PER E3875.
MAKE PER E1911
ENCAPSULATE WITH E1844, 3 COATS
PC. BOARD BLANK REFERENCE INFORMATION
BUY COMPLETE AS G3831-D (4 LAYER BOARD PER E3281)
(MAKES 2 BOARDS PER PANEL, SEE ELECTRONIC FILE FORADDITIONAL INFORMATION)
PANEL SIZE PER E1911
TEST PER E3817-SW
FOR PARTS ORDERS AND SUBSIDIARY ORDERS:
INCLUDE (1) S25191PRINT AND (1) T12837-1.
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
MANUFACTURING TOLERANCE PER E2056
Chg. Sheet No.
6-2-2000A
"X" INFO.
DESIGN INFORMATION
REFERENCE:
SUPERSEDING:
EQUIPMENT TYPE:
SUBJECT:
INVERTER WELDERS
SWITCH P.C. BOARD ASSEMBLY
ON
ON
2
3
PLACE DECIMALS IS .02
PLACE DECIMALS IS .002
DEGREE
DRAWN BY: F.V./JB
9-22-2000A
10-27-2000F
5-25-2001C
ON ALL ANGLES IS .5 OF
A
MATERIAL TOLERANCE (" ") TO AGREE
ENGINEER:
t
WITH PUBLISHED STANDARDS.
11-18-99
DRAWING No.:
APPROVED:
SCALE:
FULL
DATE:
3830-1
G
DO NOT SCALE THIS DRAWING
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
V350-PRO
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G-11
G-11
ELECTRICAL DIAGRAMS
SCHEMATIC - DISPLAY PRINTED CIRCUIT BOARD
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-12
G-12
ELECTRICAL DIAGRAMS
PC BOARD ASSEMBLY-DISPLAY
ITEM
REQ'D
PART NO.
L11130-D
L11166-1
T15176-2
E3539
DESCRIPTION
1
2
3
4
1
DISPLAY P.C. BOARD BLANK (REF ONLY)
FLEX CIRCUIT
V
1
4
LED, SPACER, 0,140 HIGH
ELECTRICAL INSULATING COMPOUND
.01 OZ.
FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENTS DATABASE FOR COMPONENT
SPECIFICATIONS
C1
1
8
S25024-7SMT
S25020-3SMT
CAPACITOR, SMD, TANTALUM, 47ME, 20V, 10%, S7343
CAPACITOR, SMD, CERAMIC, 0.1ME, 50V, 10%, X7R, S0805
C2, C3, C4, C5, C11, C12, C19,
C20
N.A.,N.D. DISP1, DISP2, DISP3, DISP4
8
S17395-6
LED, DISPLAY, 7-SEGMENT, CC, BRIGHT
DISP5, DISP6, DISP7, DISP8
J37
1
4
3
2
6
1
5
2
1
1
1
1
1
1
3
S18248-10
T13657-6
T13657-12
CONNECTOR, MOLEX, MINI, PCB, 10-PIN
LED, T-1, RED, HLMP-K101
N.A. LED1, LED2, LED3, LED4
N.A. LED 5, LED6, LED7
LED, T-1, 3/4, YELLOW, HIGH-INTENSITY
R6, R16
S25000-1501SMT RESISTOR, SMD, METAL FILM, 1/10W, 1.50K, 1%, S0805
S25000-1212SMT RESISTOR, SMD, METAL FILM, 1/10W, 12.1K, 1%, S0805
S25000-2670SMT RESISTOR, SMD, METAL FILM, 1/10W, 267OHMS, 1%, S0805
S25000-1001SMT RESISTOR, SMD, METAL FILM, 1/10W, 1.00K, 1%, S0805
S25000-10R0SMT RESISTOR, SMD, METAL FILM, 1/10W, 10.0OHMS, 1%, S0805
S25000-4751SMT RESISTOR, SMD, METAL FILM, 1/10W, 4.75K, 1%, S0805
S25000-4752SMT RESISTOR, SMD, METAL FILM, 1/10W, 47.5K, 1%, S0805
R9, R10, R11, R12, R13, R14
R20
R21, R25, R26, R28, R29
R22, R23
R24
R27
N.B. X1
S17900-8SMT
S17900-26SMT
S17900-28SMT
S17900-10SMT
S20496-1SMT
IC, SMD, CMOS, INVERTER, SCHMITT, HEX, HC14A (SS)
IC, CMOS, SMD, MUX, DAT, 8-INPUT, HC151 (SS)
IC, SMD, CMOS, INVERTING BUFFER, 3-ST (SS)
IC, SMD, CMOS, REGISTER, SHFT, S-PI/SO, 8-BIT (SS)
IC, SMD, CMOS, DRIVER, DISPLAY, LED, CC, MCU
1
N.B. X2
N.B. X3
N.A.,N.E.
N.A.
N.B. X4
2.95
X5, X6, X7
1.75
1.60
1.45
SPI DISPLAY
L11130-3
R6
C20
R21
LED5
X6
N.A.
LED
1
R25
X2
C3
X5 LED6
LED7
DISP1
DISP2
DISP3
DISP4
DISP5 DISP6
LED3
DISP7
X4
DISP8
LED1
LED2
C1
LED4
R23
X7
2
3
R11
R20
.50
R13
R16
C12
NOTES:
N.A. DO NOT COAT WITH ENCAPSULATION MATERIAL.
UNLESS OTHERWISE SPECIFIED:
CAPACITORS = MFD/VOLTS
INDUCTANCE = HENRIES
RESISTANCE = OHMS
R26
X1
R28
5
4
R9
C2
J37
C5
R27
R14
R10
N.C.
0
N.B. CAUTION: THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC
ELECTRICITY. SEE E2454 BEFORE HANDLING.
GROUND SIDE
N.A.
0
5.65
5.75
3
N.C. USE ITEM 3 TO STAND LED1, LED2,LED3 AND LED4 FROM THE P.C. BOARD. THERE
MUST NOT BE MORE THAN .020 GAP BETWEEN SPACER AND P.C. BOARD OR
BETWEEN SPACER AND LED. ENCAPSULATE P.C.BOARD, SPACER AND LOWER HALF
OF LED.
5.90
N.D. DISP 1 THRU DISP 8 MUST ALWAYS BE MATCHED BY VENDOR NAME.
DO NOT MIX DIFFERENT VENDORS ON THE SAME BOARD ASSEMBLY.
N.E. CONNECTOR MUST BE GREASED WITH ITEM 4 PRIOR TO ENCAPSULATION.
2
BUY AS:
ENCAPSULATE WITH HUMISEAL 1A27LU PER
E1844 OR WITH EQUIVALENT AS APPROVED
BY LINCOLN ELECTRIC COMPANY. (2 COATS)
IDENTIFICATION CODE
PART NO.
BUY PER E3867
TEST PER E3856-D
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
MANUFACTURING TOLERANCE PER E2056
ON 2 PLACE DECIMALS IS .02
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE
"X" INFO.
XM5626
XA
Chg. Sheet No.
6-2-2000A
8-4-2000C
DESIGN INFORMATION
REFERENCE:
EQUIPMENT TYPE:
SUBJECT:
MISCELLANEOUS
SPI DISPLAY P.C. BOARD ASSEMBLY
DATE:5-11-2000DRAWING No.:
DRAWN BY: JB/
L11130-2
ENGINEER:
SUPERSEDING:
MATERIAL TOLERANCE (" ") TO AGREE
t
WITH PUBLISHED STANDARDS.
APPROVED:
SCALE:FULL
11130-3
L
DO NOT SCALE THIS DRAWING
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
V350-PRO
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G-13
G-13
ELECTRICAL DIAGRAMS
SCHEMATIC - LED SELECT PRINTED CIRCUIT BOARD
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-14
G-14
ELECTRICAL DIAGRAMS
PC BOARD ASSEMBLY-LED SELECT
ITEM
REQ'D PART NO
DESCRIPTION
P.C. BOARD BLANK INFORMATION:
MAKE FROM S19399 (MAKES 63 BOARDS
PER PANEL, SEE ELECTRONIC FILE FOR
ADDITIONAL INFORMATION)
BLANK PART NUMBER
1
2
1
1
SEE BLANK P.C. BOARD BLANK
CI001498 E3165-.25-.75-.20
FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENTS DATABASE FOR COMPONENT SPECIFICATIONS
M19875-B
J60
1
6
S19365-5
CONNECTOR,PCB,WW,MALE,RT-L,15-PIN
LED1,LED2,LED3,LED4,LED5,
T13657-13 LED,T-1,3/4,RED,HIGH-INTENSITY, OVAL
LED6
R1,R2
S1
CATHODE
(SQUARE)
2
1
S19400-7500 RESISTOR, MF, 1/4W, 750, 1%
T13381-16 SWITCH,PUSHBUTTON,SPST
RESISTANCE = OHMS
ANODE
(ROUND)
1
ENLARGED DETAIL
(LED ORIENTATION)
N.A.
N.D.
MANUFACTURE AS:
M19875-1B0
1.33
M19875-1
LED SELECT
N.E.
IDENTIFICATION CODE
LED6 LED5 LED4
S1
J60
PART NO.
LED3 LED2 LED1
ENCAPSULATE WITH E1844. (2 COATS)
BRUSH COAT ACCEPTABLE
2
N.B.
0
0
2.55
NOTES:
N.A.
N.C.
N.A. DO NOT COAT WITH ENCAPSULATION MATERIAL.
N.B. INSERT ITEM 2 BETWEEN ROWS OF LED'S. ITEM 2
MUST BE FLUSH WITH LED BULB.
N.C. ENCAPSULATE PC BOARD AND LOWER HALF OF LED.
N.D. ENCAPSULATE AROUND BASE OF COMPONENT
N.E. COAT EXTERNAL PINS WITH ENCAPSULATION MATERIAL.
FOR PARTS ORDERS ONLY:
TEST PER E3964-ST
SCHEMATIC REFERENCE: S25259-1B0
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
MANUFACTURING TOLERANCE PER E2056
ON 2 PLACE DECIMALS IS .02
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE
"X" INFO.
Chg. Sheet No.
DESIGN INFORMATION
DRAWN BY:
REFERENCE:
EQUIPMENT TYPE:
SUBJECT:
INVERTER WELDERS
1-25-2002
F.V.
M19874-1
LED SELECT PC BD AS'BLY
MATERIAL TOLERANCE (" ") TO AGREE
WITH PUBLISHED STANDARDS.
ENGINEER: Craig Hejl
SUPERSEDING:
t
APPROVED:
SCALE:FUL
DRAWING No.:
DATE:
3-21-2001
19875-1
M
DO NOT SCALE THIS DRAWING
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
V350-PRO
Download from Www.Somanuals.com. All Manuals Search And Download.
G-15
G-15
ELECTRICAL DIAGRAMS
SCHEMATIC - LED POTENTIOMETER PRINTED CIRCUIT BOARD
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
Download from Www.Somanuals.com. All Manuals Search And Download.
G-16
G-16
ELECTRICAL DIAGRAMS
PC BOARD ASSEMBLY-LED POTENTIOMETER
ITEM
REQ'D PART NO
DESCRIPTION
P.C. BOARD BLANK INFORMATION:
MAKE FROM S19399 (MAKES 18 BOARDS
PER PANEL, SEE ELECTRONIC FILE FOR
ADDITIONAL INFORMATION)
BLANK PART NUMBER
1
2
1
SEE BLANK P.C. BOARD BLANK
10 T15176-1
LED SPACER
FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENTS DATABASE FOR COMPONENT SPECIFICATIONS
J61
1
5
2
1
S19365-15 CONNECTOR,PCB,WW,MALE,RT-L,15-PIN
T13657-11 LED,T-1,3/4,RED,HIGH-INTENSITY
M19874-A
LED1,LED2,LED3,LED4,LED5
R1,R2
S1
S19366-1
POT,ST,0.5W,10K,10%,LINEAR
T13381-17 SWITCH,PUSHBUTTON,SPST,GREEN,W/BLACK
RESISTANCE = OHMS
N.B.
N.C.
N.D.
N.C.
1.90
LED/POT
M19874-1
LED1
LED2
J61
MANUFACTURE AS:
M19874-1A2
LED3
S1
.88
LED4
R2
R1
IDENTIFICATION CODE
LED5
2
PART NO.
0
ENCAPSULATE WITH E1844. (2 COATS)
BRUSH COAT ACCEPTABLE
0
1.80
5.35
N.C.
N.A.
NOTES:
N.A. DO NOT COAT WITH ENCAPSULATION MATERIAL.
N.B. THERE MUST NOT BE MORE THAN A .010 GAP
BETWEEN SPACER & LED, OR BETWEEN SPACER
& P.C. BOARD. ENCAPSULATE P.C. BOARD,
SPACERS & LOWER HALF OF LED. LEDS MUST BE
PERPENDICULAR WITH P.C. BOARD.
N.C. ENCAPSULATE AROUND BASE OF COMPONENT
N.D. COAT EXTERNAL PINS WITH ENCAPSULATION MATERIAL.
FOR PARTS ORDERS ONLY:
TEST PER E3964-MS
SCHEMATIC REFERENCE: S25258-1A1
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
MANUFACTURING TOLERANCE PER E2056
ON 2 PLACE DECIMALS IS .02
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE
"X" INFO.
Chg. Sheet No.
DESIGN INFORMATION
DRAWN BY:
REFERENCE:
SUPERSEDING:
EQUIPMENT TYPE:
SUBJECT:
INVERTER WELDERS
1-25-2002
F.V.
LED POT P.C. BOARD ASSEMBLY
MATERIAL TOLERANCE (" ") TO AGREE
ENGINEER: Craig Hejl
t
WITH PUBLISHED STANDARDS.
APPROVED:
SCALE:FULL
DRAWING No.:
DATE:
3-9-2001
19874-1
M
DO NOT SCALE THIS DRAWING
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
V350-PRO
Download from Www.Somanuals.com. All Manuals Search And Download.
G-17
G-17
ELECTRICAL DIAGRAMS
SCHEMATIC-SPI REMOTE PRINTED CIRCUIT BOARD
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-18
G-18
ELECTRICAL DIAGRAMS
PC BOARD ASSEMBLY-SPI REMOTE
ITEM
REQ'D PART No.
DESCRIPTION
R1,R2,R3,R4,R5,R6
R7
6
1
5
5
2
8
S25000-1212SMT RESISTOR,SMD,METAL FILM,1/10W,12.1K,1%,S0805
S25000-2670SMT RESISTOR,SMD,METAL FILM,1/10W,267OHMS,1%,S0805
S25004-2430SMT RESISTOR,SMD,1W,243OHMS,1%
1
1
1
2
1
G4018-C
M19436-3
S8025-80
L11166-1
SPI REMOTE/UI PC BOARD BLANK
POTTING TRAY
2
V
R8,R9,R10,R11,R12
R13,R14,R15,R16,R17
R18,R19
3
4
SELF TAPPING SCREW
FLEX CIRCUIT ASSEMBLY
EPOXY ENCAPSULATING RESIN
ELECTRICAL INSULATING COMPOUND
SOFTWARE CPLD (X3)
SOFTWARE CPLD (X4)
PROGRAM X2 to 250K Hz
KEYING PLUG
S18380-14
THERMISTOR,PTC,500OHMS,28mA
S25000-3320SMT RESISTOR,SMD,METAL FILM,1/10W,332OHMS,1%,S0805
S25000-4751SMT RESISTOR,SMD,METAL FILM,1/10W,4.75K,1%,S0805
5
4.00 fl oz E2527
.108 fl oz E3539
R20,R21,R25,R26,R27,R28
R29,R30
6
N.B. 7
N.C. 8
N.D. 9
N.K. 10
1
1
1
1
S25336-1
R22,R23,R24,R36,R37,R45
R46,R47,R48,R49
R31,R32
10 S25000-1002SMT RESISTOR,SMD,METAL FILM,1/10W,10.0K,1%,S0805
S25337-1
2
1
2
S25000-2210SMT RESISTOR,SMD,METAL FILM,1/10W,221OHMS,1%,S0805
S25000-1000SMT RESISTOR,SMD,METAL FILM,1/10W,100OHMS,1%,S0805
S25008-1002SMT RESISTOR,SMD,PREC,MF,1/10W,10.0K,0.5%,S0805
S24671
R33
FOR ITEMS BELOW, REFER TO ELECTRONIC COMPONENTS DATABASE FOR COMPONENT SPECIFICATIONS
R34,R35
C1,C2,C3,C4,C5,C6,C7,C8,C9
44 S25020-3SMT
CAPACITOR,SMD,CERAMIC,0.1MF,50V,10%,X7R,S0805
R50,R51,R52,R53,R54,R55
R56,R57,R58,R59,R60,R61
R62,R63,R64,R65,R66,R67
R71,R72
12 S25008-4751SMT RESISTOR,SMD,PREC,MF,1/10W,4.75K,0.5%,S0805
C10,C11,C12,C13,C14,C15
C16,C17,C18,C19,C20,C21
8
S25001-1211SMT RESISTOR,SMD,1.21K,1/4W,1206,1%,TR
C22,C23,C24,C25,C26,C27
C28,C29,C30,C31,C32,C33
R68,R69,R70
R74
3
1
4
2
2
4
4
2
2
1
1
1
2
3
6
S25000-2671SMT RESISTOR,SMD,METAL FILM,1/10W,2.67K,1%,S0805
S25001-1001SMT RESISTOR,SMD,1K,1/4W,1206,1%,TR
C34,C35,C36,C37,C48,C49
C50,C54,C55,C56,C57
C38,C39
2
1
1
1
1
3
4
5
8
3
4
2
2
1
2
6
2
6
S25020-5SMT
S13490-183
CAPACITOR,SMD,CERAMIC,2700pF,50V,5%,X7R,S0805
CAPACITOR,ALEL,120MF,50V,20%
R75,R76,R77,R78
R79,R80
S25001-1000SMT RESISTOR,SMD,100OHMS,1/4W,1206,1%,TR
S25000-2211SMT RESISTOR,SMD,METAL FILM,1/10W,2.21K,1%,S0805
S25001-1213SMT RESISTOR,SMD,121K,1/4W,1206,1%,TR
C40
C41
S25020-17SMT
S13490-179
CAPACITOR,SMD,CERAMIC,0.27MF,50V,10%,X7R,S1812
CAPACITOR,ALEL,1000,35V,20%
R81,R82
C42
R83,R84,R85,R86
R87,R88,R89,R90
R91,R92
S25000-3321SMT RESISTOR,SMD,METAL FILM,1/10W,3.32K,1%,S0805
C43
S25024-10SMT
S25024-2SMT
S25024-3SMT
S25020-2SMT
S25049-4SMT
S25040-1SMT
S25040-2SMT
S25040-5SMT
S25040-4SMT
S25049-2SMT
S25044-1SMT
S25044-3SMT
S25045-1SMT
CAPACITOR,SMD,TANTALUM,22MF,25V,10%,S7343
CAPACITOR,SMD,TANTALUM,1.0MF,35V,10%,S3528
CAPACITOR,SMD,TANTALUM,2.2MF,20V,10%,S3528
CAPACITOR,SMD,CERAMIC,0.022MF,50V,10%,X7R,S0805
DIODE,SMD,DUAL,200MA,30V,SCHOTTKY,SOT-23
DIODE,SMD,1A,400V,FAST RECOVERY,DO-214BA
DIODE,SMD,1A,400V,DO-214BA/AC
S25010-3SMT
RESISTOR,SMD,MF,1W,20.0K,1%,SURGE
C44,C45,C46
C47,C51,C52,C53
C58,C59,C60,C61,C62
D1,D2,D3,D4,D5,D6,D7,D8
D9,D10,D11
D12,D13,D14,D15
D16,D17
S25000-4752SMT RESISTOR,SMD,METAL FILM,1/10W,47.5K,1%,S0805
S25000-2001SMT RESISTOR,SMD,METAL FILM,1/10W,2.00K,1%,S0805
S25000-3741SMT RESISTOR,SMD,METAL FILM,1/10W,3.74K,1%,S0805
S25000-3011SMT RESISTOR,SMD,METAL FILM,1/10W,3.01K,1%,S0805
S25000-2672SMT RESISTOR,SMD,METAL FILM,1/10W,26.7K,1%,S0805
S25000-2002SMT RESISTOR,SMD,METAL FILM,1/10W,20.0K,1%,S0805
S25000-1001SMT RESISTOR,SMD,METAL FILM,1/10W,1.00K,1%,S0805
S25000-5622SMT RESISTOR,SMD,METAL FILM,1/10W,56.2K,1%,S0805
R93,R94
N.F.
R95
R96
N.G.
N.E.
1
3
2
R97
R98,R99
DIODE,SMD,DUAL,0.200A,70V,UFR
R100,R101,R102
R103,R104,R105,R106,R107
R108
6.14
D18,D19
DIODE,SMD,DUAL,0.200A,70V,UFR
D20
DIODE,SMD,1A,30V,SMA,SCHOTTKY
DZ1,DZ2
ZENER DIODE,SMD,3W,5.1V,5%, SMB
N.L.
DZ3,DZ4,DZ5,DZ6,DZ7,DZ8
DZ9,DZ10
ZENER DIODE,SMD,3W,12V,5%, SMB
N.A. X1
1
1
1
1
1
3
1
1
1
1
1
S17900-8SMT
S25070-11SMT
S25070-3SMT
S25070-10SMT
M15105-7SMT
S15128-18SMT
S15018-11SMT
S15128-10SMT
S15018-21SMT
S25068-14SMT
M15102-4SMT
IC,SMD,CMOS,INVERTER,SCHMITT,HEX,HC14A(SS)
IC,SMD,CMOS,OSCILLATOR,DIVIDER,60MHZ,SOIC8,(SS)
CPLD,PROGRAMMABLE,XC9536,44-PIN,VQFP(SS)
IC,SMD,CMOS,CPLD,XC9572,PLCC44(SS)
ZENER_DIODE,SMD,225mW,12V,5%,SOT-23
N.A. X2
N.A. X3
N.A. X4
N.A. X5
FTP1,FTP2,FTP3,FTP4,FTP5
FTP6
TESTPT_FUNTION FUNCTIONAL TEST POINT
REMOTE
J33
1
1
2
1
4
2
2
1
S18248-10
CONNECTOR,MOLEX,MINI,PCB,10-PIN
G4018-1
IC,SMD,CMOS,CONVERTER,A/D,MPU,10-BIT(SS)
IC,OP-AMP,SMT,QUAD,HIGH-PERF,33074D
J331
S24020-12
CONNECTOR,MOLEX,MINI,PCB,12-PIN,TIN
X6,X7,X8
N.A. X9
X10
J332,J333
S24020-16
CONNECTOR,MOLEX,MINI,PCB,16-PIN,TIN
IC,SMD,CMOS,SWITCH,ANALOG,QUAD,201(SS)
IC,SMD,VOLTAGE REF,ADJ, PRECISION,431I,SOIC-8
IC,SMD,CMOS,DRIVER,MOSFET,4451, SOIC-8(SS)
IC,SMD,VOLTAGE REGULATOR,ADJ,FLYBACK,3A,TO-263
IC,ARRAY,DRIVER,PERIPHERAL,NPN,DARLINGTON
L1
S25083-3SMT
S25050-1SMT
S25051-4SMT
S25050-2SMT
S25051-6SMT
CHOKE,SMD,POWER,47UH,10%,1.25A,
Q1,Q2,Q3,Q4
TRANSISTOR,SMD,NPN,0.5A,40V,SOT-23,MMBT4401LT1
TRANSISTOR,SMD,NMF,SOT-23,0.115A,60V,7002LT1(SS)
TRANSISTOR,SMS,PNP,SOT23,0.5A, 40V,MMBT4403LT1
TRANSISTOR,SMD,NMF,DPAK,TO-252,10A,100V(SS)
N.A. X11
X12
N.A. Q5,Q6
Q7,Q8
N.A. Q9
3.64
X13
P.C. BOARD BLANK REFERENCE INFORMATION
BUY COMPLETE AS G4018-C (4 LAYER BOARD PER E3281)
UNLESS OTHERWISE SPECIFIED:
CAPACITANCE = MFD/VOLTS
INDUCTANCE = HENRIES
RESISTANCE = OHMS
N.K.
N.H.
N.E.
N.E.
4
NOTES:
N.A.
THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY. SEE E2454
CAUTION:
BEFORE HANDLING.
N.B. PROGRAM X3 WITH ITEM 7.
N.C. PROGRAM X4 WITH ITEM 8.
N.D. PROGRAM X2 WITH ITEM 9.
N.E. ALL CONNECTORS MUST BE GREASED WITH ITEM 6 PRIOR TO ENCAPSULATION.
N.F. ATTACH ITEM 1 TO ITEM 2 WITH ITEM 3. TIGHTEN ITEM 3 TO .60 M .05 Nm (5.3 M .5 in-lbs.).
N.G. PLACE BARCODED ASSEMBLY NUMBER IDENTIFICATION AND BARCODED SERIAL
IDENTIFICATION IN AREA SHOWN.
SCHEMATIC REFERENCE: G4017-1C0
BUY AS:
N.H. THESE COMPONENTS MUST BE COMPLETELY COVERED WITH ITEM 5.
G
4
0
1
8
-
1
C
0
N.K PLACE ITEM 10 ON PIN 8 OF J332 AS SHOWN.
N.L. BOARD TO BE POTTED WITH ITEM 4 LAYING ACROSS BOARD AS SHOWN.
ONLY 0.4" OR LESS OF ITEM 4 TO BE COVERED WITH ITEM 5.
PART NUMBER IDENTIFICATION CODE
BUY PER E3867
TEST PER E3964-RM
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
"X" INFO.
Chg. Sheet No.
1-25-02
DESIGN INFORMATION
REFERENCE:
MANUFACTURING TOLERANCE PER E2056
EQUIPMENT TYPE:
MISCELLANEOUS
SPI REMOTE/UI P.C. BOARD ASSEMBLY
ON
ON
2
3
PLACE DECIMALS IS .02
PLACE DECIMALS IS .002
DEGREE
DRAWN BY:
F.V.
L11346-1
ON ALL ANGLES IS .5 OF
A
SUBJECT:
Ed Furman
MATERIAL TOLERANCE (" ") TO AGREE
ENGINEER:
SUPERSEDING:
t
WITH PUBLISHED STANDARDS.
DATE:3-27-2001
DRAWING No.:
APPROVED:
SCALE:FULL
4018-1
G
DO NOT SCALE THIS DRAWING
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
V350-PRO
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G-19
G-19
ELECTRICAL DIAGRAMS
SCHEMATIC-SNUBBER PRINTED CIRCUIT BOARD
6-2-2000
S24761
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
V350-PRO
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G-20
G-20
ELECTRICAL DIAGRAMS
PC BOARD ASSEMBLY-SNUBBER
ITEM
C1,C2,C3,C4
R1,R3
REQ'D
PART NO.
DESCRIPTION
4
2
2
S20500-4 CAPACITOR,PPMF,.0047,1000V,BOX
T14648-20
T14648-25
1
RESISTOR,WW,5W,150,5%,SQ
RESISTOR,WW,5W,10,5%,SQ
R2,R4
N.A., N.B.
+.04
2.90
3
ITEM PART NO. DESCRIPTION
QTY
4
C3
1
2
3
4
M19532-A
T13157-16 TAB TERMINAL
EYELET-FEMALE
1
1
4
4
P.C. BOARD BLANK
B O X C P 4
B O X C P 4
C1
T9147-11
T9147-15 EYELET-MALE
R3
R1
B10
1.92
B1
6
1
Q C
.275
.285
NOTES:
R .045
∅
N.A. FEMALE EYELET TO BE AGAINST THE COPPER SIDE AS SHOWN
BOXCP4
C4
EYELET MUST NOT SPIN AFTER CLINCHING.
C2
MAX.
B O X C P 4
N.B. SOLDER EYELET SO THAT SOLDER COVERS ENTIRE EYELET
AND ALL AROUND EYELET ON COPPER SIDE ONLY.
NO ICICLES OR SOLDER BLOBS PERMITTED.
2
.105
CRIMP
R2
R4
COPPER
SIDE
HEIGHT
B20
B30
B40
.55
EYELET DETAIL
MANUFACTURED AS:
0
0
MAKE PER E1911
ENCAPSULATE WITH E1844, 2 COATS
TEST PER E3817-SN
M19532-1A0
+.04
.60
1.75
2.90
3.50
IDENTIFICATION CODE
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
UNLESS OTHERWISE SPECIFIED TOLERANCE
Chg. Sheet No.
"X" INFO.
XM5626
XC-UF
DESIGN INFORMATION
REFERENCE:
MANUFACTURING TOLERANCE PER E2056
ON 2 PLACE DECIMALS IS .02
EQUIPMENT TYPE:
INVERTER WELDERS
SNUBBER P.C. BOARD ASSEMBLY
6-2-2000
DRAWN BY:
ENGINEER:
APPROVED:
F.V.
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE
SUBJECT:
SUPERSEDING:
MATERIAL TOLERANCE (" ") TO AGREE
t
WITH PUBLISHED STANDARDS.
10-6-99
SCALE:
NONE
DRAWING No.:
DATE:
19532-1
M
DO NOT SCALE THIS DRAWING
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
V350-PRO
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SVM ERROR REPORTING FORM
We need to know if there are errors in our manuals. We also value any suggestions as to
additional tests or procedures that would make this SVM a better tool for you.
If you discover new or different “Problems or Symptoms” that are not covered in the three col-
umn troubleshooting chart, please share this information with us. Please include the
machine’s code number and how the problem was resolved.
Thank You,
Technical Services Group
Lincoln Electric Co.
22801 ST. Clair Ave.
Cleveland, Ohio 44117-1199
FAX 216-481-2309
SVM Number ___________________________
Page Number if necessary__________________
Your Company__________________________
Your Name_____________________________
Please give detailed description below:
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
SD287 01/99
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