LASER PRINTER
ML-1200 Series
ML-1210 / ML-1250 / ML-1220M
Manual
SERVICE
LASER PRINTER
CONTENTS
1. Precautions
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. Block Diagram
7. Connection Diagram
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This manual is stated and
provided for service description.
All rights reserved. Any parts of the
information in this manual are prohibited
from free duplication, use or translation
without prior written approval except in
cases allowed by the Copyright Act.
Specifications are subject to change without
prior notice.
Samsung Electronics Digital Printing CS Group
Copyright (c) 2001. 5.
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Precautions
1. Precautions
Please read the following carefully to prevent any accidents and not to damage the unit during service.
1-1 Safety Precautions
1. Safety Precautions
LASER STATEMENT (LASERTURVALLISUUS)
There are some electric or machinery parts with
safety related property. If the parts replaced are dif-
ferent from the original, the safety may not function.
Even if the part could allow higher voltage than that
of the part used, do not replace it and use a regular
product clarified in specifications.
WARNING : NEVER OPERATE AND SERVICE THE PRINTER
WITH THE PROTECTIVE COVER REMOVED
FROM LASER/SCANNER ASSEMBLY. THE
REFLECTIVE BEAM, ALTHOUGH INVISIBLE, CAN
DAMAGE YOUR EYES.
Class 1 laser product
2. Be careful not to leave a switch, a cover or a safety
device out when reinstalling or assembling the prod-
uct after repair.
Luokan 1 laserlaite
Klass 1 laser apparat
Allonpituus 770-795nm
Teho 0.3mW±0.03mW
3. Replacing Precautions
Do not change or add parts as you like. You cannot
benefit from such a remodeled product at your will
during the term of guarantee.
INVISIBLE LASER RADIATION WHEN
THIS COVER OPEN. DO NOT OPEN
THIS COVER.
CAUTION
4. You must replace overheated or damaged parts or
cords with regular products. Please solve the prob-
lem causing any damage or overheating and troubles
beforehand.
UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GEOFFNET.
NIGHT DEM STRAHL AUSSETZEN.
VORSICHT
REYONNEMENT LASER INVISIBLE EN CAS
D’OUVERTURE. EXPOSITION DANGERUSE AU
FAISCEAU.
ATTENTION
RADIAZIONE LASER INVISIBLE IN CASO DI
APERTURA. EVITARE L’ESPOSIZONE LA FASCIO.
ATTENZIONE
PRECAUCION
Especially mind the safety on the part with
this mark.
You must use regular parts described in specifi-
cations for the parts inflammable and where the
current can be flown. Otherwise any hazard
such as an electric shock or a fire could occur.
REDIACION LASER INVISIBLE CUANDO SE
ABRE. EVITAR EXPONERSE AL RAYO.
CAUTION : Avoid exposure to invisible laser radiation when the
development unit is not installed.
1-2 Precautions on Disassembly and Reassembly
Very careful precautions should be taken when replacing
parts. Before replacing, please check cables because
you cannot put the cables that you removed for replacing
parts into the proper place if you would not make sure of
where they were connected and in which condition.
7. When disassembling, assembling, also observe small
components are located in place.
8. If you uncover and turn the machine over to replace
some parts, toner or paper particles may contaminate
the LSU window. Protect the LSU window with clean
paper.
Please do the following before disassembling for a repair
or replacement of parts.
Releasing Plastic Latches
1. Pull out paper cassette, printer cartridge installed.
Especially careful not to be scratched by the surface of
developer or not to expose them to light.
2. Turn the power switch off.
3. Take out the power plug, printer cable from the printer.
4. Use only the same type of part as original when replac-
ing parts.
5. Do not force to open or fasten plastic material compo-
nents.
6. Be careful that small parts such as screws should not
get in the printer.
Many of parts are held in
place with plastic latches.
The latches break easily :
release them carefully.
To remove such parts,
press the hook end of the
latch away from the part to
which it is latched.
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Precautions
1-3 Tools for Troubleshooting
The following tools are recommended for safe and smooth troubleshooting described in this service manual.
DCU(Diagnostic Control Unit)
Driver
4
1Standard: Test equipment to diagnose the Laser
Standard: "-" type, "+" type (M3 long, M3 short,
M2 long, M2 short).
printer supplied by Samsung Electronics.
Pinset
5
6
Standard: For general home use, small type.
Cotton Swab
Standard: For general home use, for medical ser-
DVM(Digital Volt Meter)
2Standard: Indicates more than 3 digits.
vice.
Ground
Cleaning Equipments a IPA(Isopropyl
7 Alcohol)dry cloth or a soft stuff neutral
detergent.
Software(Driver) installation CD ROM
8
Electronic Scale
3Standard: Equipment to check the weight of con-
sumables(toner cartridge) supplied by Samsung
Electronics. (The gram unit can be measured.)
Mind your hands not to be touched when
you disassemble and reassemble PBA ASS'Y,
such as the main board, SMPS, HVPS.
Note
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Specifications
2. Specifications
ML-1210 (ML-1220M)
ML-1250
Engine
Speed
12ppm
Resolution
600 x 600 dpi
1200 x 600 dpi
FROP(Fist Power On Time)
Warm-Up Time
Power Consumption
Dimension
Under 12.5 sec
30 sec
25W (Print), 10W (Sleep)
329 x 355 x 231 mm (13” x 14” x 9.1”)
Max 6.5Kg (With Toner Cartridge)
Weight
Controller
Processor
Jupiter 366MHz
61200 66MHz
Memory
8MB Equivalent
SmartGDI
4MB
Emulation
PCL6
Interface
IEEE1284, USB (ML-1220M : USB ONLY)
OS Support
Windows 95/98/2000/Me/NT,
Linux(Radhat 6.0), iMac(Mac OS 8.0)
N/W
External
Input
150 sheets
Paper
Toner
Output
Manual
Media Type
100 sheets
1 sheet
A4, Letter. Legal, Executive, B5, A5, Folio,
7 3/4(Monarch), #10, DL, C5, C6, B5
Type
Single Cartridge
2,500 sheets
2,500 (Initial : 1,000)
60,000
Life
Cartridge
Pick up Roller
Feed Roller
Transfer Roller
Fuser
60,000
60,000
40,000
Key & LED
LCD
3Key, 4LEDs
No
User interface
Toner Save
Reprint
YES
YES
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Disassembly and Reassembly
3. Disassembly and Reassembly
3-1 Cover Assembly
3-1-1 Front Cover
1. Pull the both side of the cover to open.
4. Remove a screw of the front cover PCB and remove
the connector, then remove the cover.
2. Remove a screw and remove the stopper that holds
the printer cover.
3-1-2 Other Covers
1. Before you remove other covers, you should remove the
Front cover in advance.
a
2. Rear Cover : Remove the cover in the direction of
3. Top Cover : Remove the cover in the direction of
.
.
b
c
4. Side Cover L, R : Remove the cover in the direction of
.
3. Loosen the right lower part of the cover, then push the
cover in the direction of arrow to loosen the left lower
part.
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Disassembly and Reassembly
3-2 LED Panel PBA
1. Before you remove other covers, you should remove.
• Front Cover (see [3-1 Main Cover])
3. Remove two screws, and remove LED panel.
2. Remove two screws of PCB cover, and widen the
hooks(
) to remove.
c
a
b
4. Remove PCB from the PCB cover.
3-3 LSU(Laser Scanning Unit)
1. Before you remove LSU, you should remove front
cover, rear cover and top cover.
3. Remove two connectors from the LSU, then remove
the LSU.
• Main Cover (see [3-1 Main Cover])
2. Remove three screws securing the LSU.
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Disassembly and Reassembly
3-4 Transfer Roller
1. Open the front cover.
2. Use a proper tool("-" type screwdriver) to pull the one
end of the roller slightly, then take it out.
3-5 Motor Assembly
1. Before you remove the motor assembly, you should
remove:
• Main Cover (see [3-1 Main Cover])
• Shield Engine Assembly
2. Remove five screws securing the motor assembly
and remove a connector from engine board(Engine
board and SMPS board are integrated), then take the
motor assembly out.
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Disassembly and Reassembly
3-6 HVPS Board
1. Before you remove HVPS board, you should remove:
•Main Cover (see [3-1 Main Cover])
2. Remove four screws and a connector from HVPS
board, then take the board out.
When you reassemble the HVPS board, make
sure that five terminals should be put in place.
Terminal
Note
3-7 Fuser Assembly
1. Before remove fuser assembly, you should remove:
• Main Cover (see [3-1 Main Cover])
3. Remove two screws and unplug a fuser assembly
harness. Then use a " - " screwdriver to unlatch the
fuser assembly to remove.
2. Remove two ground screws and a connector as illus-
trated.
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Disassembly and Reassembly
3-8 Thermostat and Halogen Lamp
1. Remove a screw from the fuser assembly and
remove the thermostat cover, then remove two
screws securing the thermostat.
3. Take the halogen lamp out from the Heat Roller.
When you reassemble the halogen lamp,
handle it with care as it is fragile.
Note
2. Remove two screws from the fuser assembly, and
take the Heat Roller out.
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Disassembly and Reassembly
3-9 SMPS Board
1. Before you remove the SMPS board, you should
remove:
3. Unplug connectors from the main board and connec-
tors from SMPS, then remove the SMPS. Remove
four screws from SMPS and remove the SMPS
board.
• Main Cover (see [3-1 Main Cover])
a
b
2. Remove screws in the order of
the shield engine assembly.
then remove
a
The Engine board and SMPS board are
integrated in a body.
b
Note
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Disassembly and Reassembly
3-10 Main Board and Sensor Board
1. Before you remove the main board, you should
remove:
3. Release four snap-fits securing the insulator engine
board and then remove the insulator.
• Main Cover (see [3-1 Main Cover])
• SMPS board (see [3-9 SMPS Board])
2. Remove two screws from the main board and unplug
all of connectors, then remove the board.
Main B’d
4. Release four snap-fits securing the sensor board and
then remove the sensor board.
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Troubleshooting
4. Troubleshooting
4-1 How to use DCU
4-4 The cause and solution of the malfunction
4-1-1 DCU Setup......................................Page(4-2)
4-1-2 Code ................................................Page(4-2)
4-1-3 Self Diagnostic Mode......................Page(4-3)
4-1-4 Self Test Button ................................Page(4-4)
4-1-5 Paper Path Layout...........................Page(4-4)
4-4-1 All LEDs blinking (Fuser Error)........Page(4-16)
4-4-2 All LEDs blinking (SCAN ERROR) .Page(4-16)
4-4-3 Not function of the gear of the fuser due to
melting away.....................................Page(4-17)
4-4-4 Paper Empty.....................................Page(4-17)
4-4-5 Paper Empty without indication.......Page(4-17)
4-4-6 Cover Open......................................Page(4-18)
4-4-7 No lamp on when the cover is open
4-2 The cause and solution of Bad image
...........................................................Page(4-18)
4-2-1 Vertical Black Line and Band ..........Page(4-5)
4-2-2 Vertical White Line ...........................Page(4-5)
4-2-3 Horizontal Black Band .....................Page(4-6)
4-2-4 Black/White Spot..............................Page(4-6)
4-2-5 Light Image.......................................Page(4-7)
4-2-6 Dark Image or a Black.....................Page(4-7)
4-2-7 Uneven Density................................Page(4-8)
4-2-8 Background ......................................Page(4-8)
4-2-9 Ghost (1)...........................................Page(4-9)
4-2-10 Ghost (2)..........................................Page(4-9)
4-2-11 Ghost (3)..........................................Page(4-10)
4-2-12 Ghost (4) .........................................Page(4-10)
4-2-13 Satins on the Face of Page............Page(4-10)
4-2-14 Satins on Back of Page..................Page(4-11)
4-2-15 Blank Page Print out (1) .................Page(4-11)
4-2-16 Blank Page Print out (2) .................Page(4-11)
4-4-8 Defective motor operation ...............Page(4-19)
4-4-9 No Power..........................................Page(4-19)
4-4-10 Vertical Line Getting Curved .........Page(4-20)
4-5 Toner Cartridge Service
4-5-1 Precautions on Safe-keeping of Toner Cartridge
..........................................................Page(4-21)
4-5-2 Service for the Life of Toner Cartridge
..........................................................Page(4-21)
4-5-3 Service for Judgement of Inferior Expendables
and the Standard of Guarantee .....Page(4-21)
4-5-4 Signs and Measures at Poor toner cartridge
..........................................................Page(4-22)
4-6 The cause and solutions of bad environment
of the software
4-6-1 The printer is not working (1)...........Page(4-25)
4-6-2 The printer is not working (2) .........Page(4-26)
4-6-3 Abnormal Printing.............................Page(4-27)
4-6-4 SPOOL Error ...................................Page(4-28)
4-3 The cause and solution of the bad discharge
4-3-1 Wrong Print Position.......................Page(4-12)
4-3-2 JAM 0...............................................Page(4-12)
4-3-3 JAM 1...............................................Page(4-13)
4-3-4 JAM 2...............................................Page(4-13)
4-3-5 Multi-Feeding...................................Page(4-14)
4-3-6 Paper rolled in the fuser .................Page(4-14)
4-3-7 OPC.................................................Page(4-15)
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Troubleshooting
4-1 How to use DCU
4-1-1 DCU Setup
You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave the connect
the harness wire(10 pin/4 pin) to the CN10(4 pin) of the Main control board.
4-1-2 Code
Connect DCU to the printer and turn the power on. It show 7 LED on the panel and each code tells the function of the
printer.
Normal Code
While printing or warming up, it indicate the position of the paper
61
Warm up
The printer is on, the cover is open or close.
00-05
Ready(kind of paper) The printer is ready, the paper is detected when the first paper is printed.
00: Legal , 01: Letter , 02: A4 , 03: EXEC , 04: B5 , 05: Folio
20
30
40
50
69
Print Start
The engine controller received the print order from the video controller.
The paper is passing out of the Feed Sensor.
Feed Sensor On
Feed Sensor off
Paper Out
The paper has passed out of the Feed Sensor.
The paper has passed out of Exit Sensor.
Sleep Mode
The fuser power turned off to minimize the power consumption.
Error Code
When detecting the malfunction, the printing is stopped to indicate error code.
60, 62, 68 Fuser Error The error in the fuser occurred. There is a short circuit in the thermistor and the
thermostat while printing, Low Temperature Error occurs.
• 60: Open Fuser Error
• 62: Low Heat Error
• 68: Over Heat Error
64
70
71
72
73
95
Cover Open
No Paper
The Printer Cover is open or Toner Cartridge not installed.
No paper in the paper cassette.
Paper Jam 0
Paper Jam 1
Paper Jam 2
LSU Not Ready
The front part of paper is jammed between pickup unit and Feed sensor.
The front part of paper is jammed between the Discharge sensor and Feed sensor.
The front part of paper is jammed just after passing through the discharge sensor.
LSU Scanner Motor not ready or Hsync signal not output.
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Troubleshooting
4-1-3 Self Diagnostic Mode
If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.
The printer works only in the self-test mode to solve the malfunction problem.
To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same time.
Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button [Up] or [Shift]
to select the self+test , and press the button of [Enter] to operate. To stop, press the button of [shift] and [Enter] together.
00
01
02
03
04
Main Motor Operating System
Only the main motor is in operation.
Main High Voltage On(THV-)
-1550 voltage output by MHV terminal.
Transfer High Voltage(-)On(THV-)
Caution : High voltage probe should be used.
-1300 voltage output by MHV terminal.
Transfer High Voltage (+)Reference on (THV +)
1300 voltage output by MHV terminal.
DEV/supply High Voltage : DEV/Supply High Voltage Test.
Caution
:
High voltage probe should be used.
Caution : High voltage probe should be used.
The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply high voltage output
by each HV terminal. Press the [Up] button to switch the voltage. The middle and right one of the three LEDs
are on and -530 voltage output by DEV HV terminal.
Caution : High voltage probe should be used.
05
LSU Operating System
The scanning motor of LSU is in operation, the right LED of the three buttons on. Press the [Up] button to
Check LD. LD is functioning and the middle button is on. If the LD is normal, all LEDs are on.
06
07
Pickup clutch on
The Solenoid in the printer is in operation. To stop the operation, Press the button [shift] and [Enter] together.
Pempty/PWIDTH/New CRU Sensor Test : Pempty/PWIDTH.HEW CRU sensor test.
If activate the Actuator of the PEMPTY/PWIDTH Sensor, the left and right of the three LEDs are on.
If you install new toner Cartridge in this mode, the right LED is on.
08
09
10
Feed & Exit Sensor Test
Test the Feed sensor and Discharge sensor in the same way as '06'.
Cover Open Sensor Test
The same way as code '06'.
Fuser Test
If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to READY Mode. If the
[Up] button pressed, the middle LED is on and temperature of the fuser is up to Printing Mode.
If you press the button once more, the left LED is on and temperature of the fuser is up to overheat Mode.
11
Hot Burn Test
If the [enter] button pressed, the printer is continuously printing without detection. Turn the power off to stop
operation.
12.
Cleaning Mode Print Mode
Print the paper to clean the OPC Drum in the Cartridge.
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Troubleshooting
13.
THV(+) TRIGGER. ALL HV
All high voltage output by each HV terminal and LSU and the fan is in operation. In this mode, electronic
resistance of transfer roller and high voltage is detected. If no toner cartridge in the printer, output of THV is
+199V ~ + 2100V.
14.
15.
PTL Test
Indicates the PTL LED.
Fan Test
Indicates the function of the fan.
4-1-4 Self Test Button
If the Self-Test button pressed, vertical lines are printed.
Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After warming-up the
printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection, the printer begins
printing(trial printing and data from the PC). It is convenient to use this mode when the engine malfunction is detected in
the control board.
4-1-5 Paper Path Layout
APER (150 SHEETS)
APER (100 SHEETS)
1
SHEET
RECORDED
P
RECORDED P
MANUAL
FACE DOWN
LSU
KNOCK UP
EXIT 2
PICK UP
CARTRIDGE
CR
DR
FUSER
SR
IDLE
OPC
H R/L
FEED
EMPTY SEN
FACE UP
TR
FEED SEN
PTL
MAIN BOARD
EXIT 1
SENSOR BOARD
Pr R/L
EXIT SENSOR
SMPS
SHIELD
SHIELD
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Troubleshooting
4-2 The cause and solution of Bad image
4-2-1 Vertical Black Line and Band
1. Straight thin black vertical line occurs in the printing.
• Description
2. Dark black vertical band occur in the printing.
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Damaged develop roller in the Developer
or deformed Doctor-blade.
1. If causes 1 and 2 occur in the developer
cartridge, replace the developer and try to
print out.
2. Scratched surface of the discharge roller
2. Replace the transfer roller if occurred as
No. 3.
Digital Printer
in the developer, or heavily accumulated
foreign matters between the discharge
roller and fur transfer roller/ charge roller.
3. Partly depression or deformation on the
surface of the transfer roller.
4-2-2 Vertical White Line
• Description
White vertical voids in the image.
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Foreign matter stuck onto the window of
internal lenses of LSU mirror.
1. Foreign matter stuck onto the window :
Clean the LSU window with recommend-
ed cleaner(IPA) Clean the window with a
clean cotton swab.
2. Foreign matter or toner particles between
the developer roller and blade.
(In case the life of the developer has
been expired, white lines occur in front of
the image.)
2. Foreign matter in the LSU : Open the
cover of LSU and clean with a cotton
swab on the surface of the reflex mirror.
3. It may occur when Burr and foreign sub-
stances are on the window of the devel-
oper frame.
3. No 3. : Remove the foreign matter and
burr of the exposure window.
4. If the fuser is defective, voids occur peri-
odically at the top of a black image.
4. No. 4. : Open the front cover and check
ribs that corresponds to the position of
the voids. Remove if found.
5. If the problems are not solved, check to
see if the weight of the developer is
below 670g. If so, replace the developer
cartridge.
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Troubleshooting
4-2-3 Horizontal Black Band
1. Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)
• Description
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Bad contacts of the voltage terminals to
developer.
1. Clean each voltage terminal of the Charge,
Supply, Develop and Transfer roller.
(remove the toner particles and paper par-
ticles)
2. The rollers of developer may be stained.
Charge roller = 37 mm
2. Clean the right Gear that has relatively
small gap of the teeth in the OPC.
Supply roller = 27 mm
Develop roller = 32 mm
Transfer roller = 47 mm
3. If the malfunction persists, replace the
developer.
4-2-4 Black/White Spot
1. Dark or blurry black spots occur periodically in the printing.
2. White spots occur periodically in the printing.
• Description
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. If dark or blurry black spots occur periodi-
cally, the rollers in the Developer may be
contaminated with foreign matte or paper
particles.
1. Run OPC cleaning Mode Print and run the
Self-test 2 or 3 times.
( Charge roller : 37 mm interval
OPC drum : 75mm interval)
2. If faded areas or voids occur in a black
image at intervals of 75 mm, or black
spots occur elsewhere, the OPC drum
surface is damaged.
2. In case of 75mm interval unremovable in 1,
cleanly remove foreign substances stuck on
the OPC location equivalent to black spots
and white spots with a dry duster.
3. If a black image is partially broken, the
transfer voltage is abnormal or the trans-
fer roller's life has expired.
3. The transfer roller guarantees 50,000
sheets printing. If the roller's life is expired,
replace it.
4. In case of 37mm interval unremovable in 1,
take measures as to replace the developer
cartridge and try to print out.
5. Clean the inside of the set against the paper
particles and foreign matter in order not to
cause the trouble.
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Troubleshooting
4-2-5 Light Image
• Description
The printed image is light, with no ghost.
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Develop roller is stained when the toner
of developer cartridge is almost con-
sumed.
1. Check if the Toner Save mode is off.
2. Ambient temperature is below than 10°C.
2. Replace the developer cartridge and try to
print out.
3. Wait 30 minutes after printer is powered on
before you start printing.
3. Bad contact caused by the toner stains
between the high voltage terminal in the
HVPS and the one in the set.
4. Clean up the contaminated area by the
toner.
4. Abnormal output from the HVPS.
(Run self-test and check 1~4)
5. Replace the HVPS if the problems are not
solved by the above four directions.
( Service parts : Figure 11, Chapter 5)
4-2-6 Dark Image or a Black
• Description
The printed image is dark.
Check and Cause
Solution
1. No charge voltage in the engine board.
( Perform DCU diagnostic code 01)
1. Clean the high voltage charge terminal.
2. Charge voltage is not turned on due to
the bad contacts between power supply
in the side of the Developer and charge
terminal of HVPS.
2. Check the state of the connector which
connects the engine board and HVPS.
3. Replace the HVPS if not solved by the
above direction 1 and 2.
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Troubleshooting
4-2-7 Uneven Density
• Description
Print density is uneven between left and right.
Check and Cause
Solution
1. The pressure force on the left and right
springs of the transfer roller is not even,
the springs are damaged, the transfer
roller is improperly installed, or the trans-
fer roller bushing or holder is damaged.
1. Replace both the left and right Spring
Holder.
2. The toner level is not even on the devel-
oper roller due to the bad blade.
2. Occur in the developer cartridge, replace
the developer and try to print out.
4-2-8 Background
• Description
Light dark background appears in whole area of the printing.
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Recycled recording paper has been
used.
1. B/S is not guaranteed when using recycled
paper.
2. The life of the Developer has expired.
(The weight at the expiration of the
developer's life: 800 ± 20g)
2. Replace the Developer that has expired.
3. Clean the busing part of the transfer roller.
3. The up-to-down movement of the trans-
fer roller is swift?
4. The HVPS is normal?
4. Replace the Developer if not solved by the
above direction 1~3.
(Perform DCU diagnostic code 01~04)
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Troubleshooting
4-2-9 Ghost (1)
• Description
Ghost occurs at 75 mm intervals of the OPC drum in the whole printing.
Check and Cause
Solution
Digital Printer
Digital Printer
1. Bad contacts caused by contamination
from toner particles between high voltage
terminal in the main body and the elec-
trode of the Developer.
1. Clean the terminals when contaminated by
toner particles.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
2. Bad contacts caused by contamination
from toner particles between high voltage
terminal in the main body and the one in
the HVPS board.
2. Occur in the developer cartridge, replace
the developer and try to print out.
3. The life of developer is expired.
3. Replace the engine board if not solved by
the above directions 1-2.
(Service Parts : Figure 9 , chapter 5)
4. Transfer roller lifetime(50,000 sheets) has
expired.
4. If not solved by the direction 3, check the
transfer roller lifetime and replace it.
(Service Parts : Figure 8-2 , chapter 5)
5. Abnormal low temperature(below 10°C).
5. Wait about 1 hour after power on before
using printer.
4-2-10 Ghost (2)
Ghost occurs at 75 mm intervals of the OPC drum in the whole printing.
(When printing on card stock or transparencies using manual feeder)
• Description
Check and Cause
Solution
Digital Printer
Digital Printer
When printing on card stock thicker than nor-
mal paper or transparencies such as OHP,
higher transfer voltage is required.
Select 'Thick Mode' on paper type menu from
the software application and after using return-
ing to the original mode is recommended.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
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Troubleshooting
4-2-11 Ghost (3)
• Description
White ghost occurs in the black image printing at 32mm intervals.
Check and Cause
Solution
Digital Printer
Digital Printer
1. The life of the developer may be expired.
1. Occur in the developer cartridge, replace
the developer and try to print out.
Digital Printer
Digital Printer
2. The abnormal voltage and bad contact of
the terminal of the supply roller.
2. Check the approved voltage of the supply
roller and contact of the terminal and adjust
if necessary.
Digital Printer
Digital Printer
4-2-12 Ghost (4)
• Description
Ghost occurs at 47mm intervals.
Check and Cause
Solution
Digital Printer
Digital Printer
The temperature of the fuser is maintained
high.
1. Disassemble the fuser and remove the
contaminated toner particles on the roller
and clean the foreign matter between
Thermistor and Heat roller.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
(
Caution: can be deformed)
4-2-13 Satins on the Face of Page
• Description
The background on the face of the printed page is stained.
Check and Cause
Solution
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Toner leakage due to improperly sealed
developer.
1. Replace the developer cartridge.
2. If the transfer roller is contaminated, satins
on the face of page will occur.
2. If the transfer roller is contaminated, run PC
Cleaning Mode Print 2 or 3 times.
And perform Self-Test 2 or 3 times to
remove contamination.
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Troubleshooting
4-2-14 Satins on Back of Page
• Description
The back of the page is stained at 47mm intervals.
Check and Cause
Solution
Digita
Digital
Digital Printer
Digital Printer
Digital Printer
1. Transfer roller is contaminated.
1. Perform the OPC Cleaning Mode Print 2 or
3 times. Run Self-Test to remove the conta-
mination of the transfer roller.
2. Pressure roller is contaminated.
2. Replace the transfer roller if contaminated
severely.
3. Disassemble the fuser and clean the
H/R(Heat Roller) and P/R(Pressure roller).
And check the area between H/R and
Thermistor. If contaminated, clean the area
not to be deformed.
4-2-15 Blank Page Print out (1)
• Description
Blank page is printed.
Check and Cause
Solution
Bad ground contacts in OPC and/or devel-
oper.
Remove contamination of the terminals of the
developer and the unit.
4-2-16 Blank Page Print out (2)
1. Blank page is printed.
2. One or several blank pages are printed.
• Description
3. When the printer turns on, several blank pages print.
Check and Cause
Solution
1. Bad ground contacts in OPC and/or
developer.
1. Remove contamination of the terminals of
the developer.
2. Abnormal solenoid.
2. Perform the engine self test using DCU to check
if the Solenoid is normal.(refer to code 06)
3. If not solved by the above directions 1-2,
Replace the engine board.
(Service Parts : Figure 9 , chapter 5)
4. Turn the power off, delete the data of PC
and try printing again.
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Troubleshooting
4-3 The cause and solution of the bad discharge
4-3-1 Wrong Print Position
• Description
Printing begins at wrong position on the paper.
Check and Cause
Solution
Wrong sense time caused by defective feed sensor
actuator.
Replace the defective actuator
(Service Parts : Figure 8-16 , chapter 5)
4-3-2 JAM 0
1. Paper is not exited from the cassette.
2. Jam-0 occurs if the paper feeds into the printer.
• Description
Check and Cause
Solution
1. Check the Solenoid by using DCU
diagnostic mode 06.
1. Replace the solenoid. (Service Parts :
Figure 8-11 , chapter 5)
LSU
EXIT
2
PICK UP
2. Check if the pad is loose due to bad
sealing of the side-pad.
2. Replace the side-pad Assembly L or
R, if necessary.
CARTRIDGE
FEED SEN
(Service Parts : Figure 8-13 , 8-14,
chapter 5)
EXIT
1
EXIT SENSOR
3. Check the surface of the roller-pick-
up for foreign matter.
JAM 0
3. Clean with soft cloth dampened with
IPA(Isopropyl Alcohol) or water.
4. If continuous clusters occur, check
whether the assembly slot between
shaft-pickup and housing-pickup
become open or is broken away.
4. Replace the Housing-Pickup and/or
Shaft-Pickup.
(Service Parts : Figure 8-135, 8-12, chapter 5)
5. If the paper feeds into the printer
rand Jam 0 occurs, perform DCU to
check feed-sensor of the sensor
board.
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Troubleshooting
4-3-3 JAM 1
1. Recording paper is jammed in front of or inside the fuser.
• Description
2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the
Actuator-Feed.
Check and Cause
Solution
1. If the recording paper is jammed in
front of or inside the fuser.
1. Replace the SMPS. (Service Parts :
Figure 10, chapter 5)
LSU
(Perform DCU diagnostic code of)
EXIT
2
PICK UP
FEED
CARTRIDGE
FEED SEN
2. If the recording paper is stuck in the
discharge roller and the fuser just
after passing through the Actuator-
Feed, Feed Actuator may be defec-
tive.
2. Reassemble the Actuator-Feed and
Spring-Actuator if the returning is bad.
EXIT
1
EXIT SENSOR
JAM 1
4-3-4 JAM 2
1. Recording paper is jammed in front of or inside the fuser.
2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the
Actuator-Feed.
• Description
Check and Cause
Solution
1. If the paper is completely fed out of
the printer, but Jam 2 occurs : Exit
sensor is defective.
1. Check if the exit sensor actuator is
defective.
• Check if the actuator exit is unformed
(Check if the lever part is unformed
in shape).
• Check whether burrs occur in the
assembly part of the actuator exit or
not and if the actuator is smoothly
operated.
LSU
• After the paper is completely dis-
charged, actuator Exit should return
to the original position to shut the
photo-sensor. Sometimes it takes
longer hour than it should and does
not return.
EXIT
2
PICK UP
CARTRIDGE
FEED SEN
EXIT
1
EXIT SENSOR
JAM 2
• Check if foreign matters and wire get
caught in the actuator exit's operation.
2. If the paper is rolled in the Fuser Roller:
• This occurs when a Guide claw is
broken away or transformed.
• It occurs when the Spring of a Guide
claw is broken away or transformed.
• It occurs when the Heat-Roller or
Pressure-Roller is seriously contami-
nated with the toner.
2. If the paper is stuck in the fuser : dis-
assemble the fuser and remove the
jammed paper, and clean the surface
of the pressure roller with dry gauze.
3. Paper is accordion in the fuser.
3. Remove the jammed paper after disas-
sembling the fuser : Clean the surface
of the pressure roller with dry gauze.
• Remove the toner particles stained
on the rib.
• Check the assemblage and perfor-
mance of the exit.
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Troubleshooting
4-3-5 Multi-Feeding
• Description
Multiple sheets of paper are fed at once.
Check and Cause
Solution
1. Solenoid malfunction(the solenoid does not work
properly): Perform DCU mode : solenoid check 06.
1. Replace the solenoid if necessary.
(Service Parts : Figure 13, chapter 5)
2. Pad-Friction is contaminated with foreign matter.(oil...)
3. The face of paper is blended.
2. Clean the pad friction with soft clothe dampened
with IPA(Isopropyl Alcohol).
3. Use the smooth paper.
4-3-6 Paper rolled in the fuser
• Description
If contaminated at intervals of 57mm on the back of a paper.
Check and Cause
Solution
1. Contamination of the pressure roller.
(Background, Hot off set)
1. Disassemble the fuser, clean the area between the
Heat-roller and Thermistor and remove the foreign
matter of the pressure roller.
2. If background appears badly in the printing, fix it by
referring to the solutions for background.
(See 4-2-8 Background)
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Troubleshooting
4-3-7 OPC
• Description
Paper is rolled up in the OPC.
Check and Cause
Solution
1. Paper is too much thin.
1. Recommend to use normal paper.
2. The face of paper is curled.
2. How to remove the rolled paper in the OPC.
• Remove the paper while turning the OPC against
the ongoing direction.
• Clean fingerprints on the OPC softly with soft
cloth dampened with IPA(Isopropyl Alcohol) or tis-
sue.
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Troubleshooting
4-4 The cause and solution of the malfunction
4-4-1 All LEDs blinking (Fuser Error)
1. All the lamps on the operator panel blink.
2. Gear of the fuser does not work and breaks away melt away.
• Description
When printing, motor breaks away from its place due to defective fuser gear.
Check and Cause
Solution
1. Check if the thermostat, AC wire and Heat Lamp is
open.
1. If the thermostat is open replace the fuser and
check following items.
2. Check if the thermistor sensor is in place.
2. If the thermistor sensor device is located deep in the
sponge, replace the fuser.
3. Check if the heat lamp works properly.
3. Check if the circuit of overheat mode works properly.
4. Run DCU mode : Perform DCU diagnostic code 10.
4. Check if the overheat circuit works properly.
5. The fuser gear is defective due to melting away.
4-4-2 All LEDs blinking (Scan Error)
• Description
1. All lamps on the operator panel blink.
Check and Cause
Solution
DCU Mode : Perform DCU diagnostic code 05. If the DCU
error code 95 is displayed, replace LSU.
Replace LSU.
(Service Parts : Figure 13, chapter 5)
If you cannot solve the problem after you replace LSU,
replace the main board.
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Troubleshooting
4-4-3 Not function of the gear of the fuser due to melting away
• Description
The motor breaks away from its place due to gear melting away.
Check and Cause
Solution
DCU Mode : Check if the Error States '60' '62' '68' occur.
Check the operation of Fuser Erasing Lamp On/Off with
the Error Code Check -10-.
1. Replace the Fuser.
(Service Parts : Figure 8-4, Chapter 5)
2. Replace the Main Control board.
(Service Parts : Figure 9, Chapter 5)
4-4-4 Paper Empty
• Description
The paper lamp on the operator panel is on even when paper is loaded in the cassette.
Check and Cause
Solution
1. Bending or deformation of the actuator of the paper sen-
sor.
1. Replace the defective actuator.
(Service Parts : Figure 8-17, Chapter 5)
2. The function of the sensor board is defective Perform
DCU mode: Perform DCU diagnostic code 8.
2. Replace the sensor board.
(Service Parts : Figure 8-10, Chapter 5)
4-4-5 Paper Empty without indication
• Description
The paper lamp on the operator panel does not come on when the paper cassette is empty.
Check and Cause
Solution
1. Bending or deformation of the actuator of the paper sen-
sor.
1. Replace the defective actuator.
(Service Parts : Figure 8-17, chapter 5)
2. The function of the sensor board is defective Perform.
DCU mode : Perform DCU diagnostic code 8.
2. Replace the sensor board.
(Service Parts : Figure 8-10, chapter 5)
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Troubleshooting
4-4-6 Cover Open
• Description
The ERROR lamp is on even when the print cover is closed.
Check and Cause
Solution
1. The hook lever in the top cover may be defective.
1. Replace the hook lever, if defective.
(Service Parts : Figure 1, chapter 5)
2. Check the connector and circuit of the cover switch
department in the Main Control board. Perform DCU
mode : If Error state '64' occurs, Check the related codes
of the Cover Open Error.
2. Check the insertion of the Cover Open Sensor
Connect.
3. Replace the Main Control board or Cover Open
Sensor.
(Service Parts : Figure 9, chapter 5)
Hook Lever
4-4-7 No lamp on when the cover is open
• Description
The ERROR lamp does not come on even when the printer cover is open
Check and Cause
Solution
1. Check the connector(CN8) and circuit of the cover switch
department in the Main Control board. Perform DCU
mode : If Error state '64' occurs, Check the related codes
of the Cover Open Error
1. Check the insertion of the Cover Open Sensor
Connect.
2. Replace the Main Control board or Cover Open
Sensor.
(Service Parts : Figure 9, chapter 5)
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Troubleshooting
4-4-9 Defective motor operation
• Description
Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.
Check and Cause
Solution
1. Motor harness or sub PCB may be defective.
1. Check the motor harness, replace it, if defective.
(Service Parts : Figure 12, chapter 5)
2. Perform DCU diagnostic code 00 and Check the motor
operation.
2. Replace the SMPS, if necessary.
(Service Parts : Figure 10, chapter 5)
4-4-10 No Power
• Description
When system power is turned on, all lamps on the operator panel do not come on.
Check and Cause
Solution
1. Check if the power input and SMPS output are normal.
1. Replace the power supply cord or SMPS.
(Service Parts : Figure 10, chapter 5)
2. Check the inferiority of LED-Panel on the front-cover if
2. Replace the control board.
the LED of Panel does not appear after normal warming-
up.
(Service Parts : Figure 9, chapter 5)
3. Replace the LED-panel.
(Service Parts : Figure 1-1, chapter 5)
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Troubleshooting
4-4-11 Vertical Line Getting Curved
• Description
When printing, vertical line gets curved.
Check and Cause
Solution
1. If the supply of +24v is unstable in the Main Control board
linking with LSU, check drive by DCU Mode: LSU Check
-05- LSU Motor on.
1. Replace LSU.
(Service Parts : Figure 13, chapter 5)
2. Replace the Main Control board.
(Service Parts : Figure 9, chapter 5)
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Troubleshooting
4-5 Toner Cartridge Service
It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by the
Samsung Electronic or caused by non-licensed refill production.
4-5-1 Precautions on Safe-keeping of Toner Cartridge
Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.
4-5-2 Service for the Life of Toner Cartridge
If the printed image is light due to the life of the toner, you can temporarily improve the print quality by redistributing the
toner(Shake the toner cartridge), however, you should replace the toner cartridge to solve the problem thoroughly.
4-5-3 Service for Judgement of Inferior Expendables and the Standard of Guarantee
Please refer to User's Manual or Instructions on Fax/Printer Expendables SVC for the judgement of inferior expend-
ables and the standard of guarantee besides this service manual.
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Troubleshooting
4-5-4 Signs and Measures at Poor toner cartridge
Fault
Signs
Cause & Check
Solution
Light image and
partially blank
image
• The printed image
is light or unclean
and untidy.
1. If the image is light or unclean 1. All of 1, 2, 3 above-
and untidy printed image -
Shake the developer and
then recheck.
(1)NG: Check the weight of the
developer
(1)The weight of the developer
ended: 800g ± 20g
(The life is ended.)
(2)If it become better by shaking,
replace with a new developer
after 50-100 sheets in the clos-
ing state of the life span.
• Some part of the
image is not print-
ed.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
(2)OK: Lack of toner, so the life
is nearly closed.
2. In case of 2-
• Periodically a noise 2. Some part of image is not
as "tick tick" occurs.
If it becomes better after clean-
ing the LSU window, then the
developer is normal.
(Because of foreign substance
on the LSU window, the image
has not been printed partly.)
printed - Shake the develop-
er and then recheck.
(1)NG: Check the weight of the
developer and clean
the LSU window with a
cotton swab, then
recheck.
(2)OK: Lack of toner, so the life
is nearly closed.
3. Periodically a noise as "tick
tick" occurs - Measure the
cycle and the weight of the
developer.
3. In case of 3-
If the cycle of noise is about 2
seconds, the toner inside the
developer has been nearly
exhausted.( Purchase and
replace with a new developer
after using about 200 sheets at
the point of occurrence)
4. In case of 3-
4. White vertical stripes on the
whole screen or partly :
Check the weight of the
developer.
This is a phenomenon caused
by lack of toner, so replace with
a new developer.
Toner
Contamination
• Toner is fallen on
the papers periodi-
cally.
1. Toner is fallen on the paper
periodically.
(1)Check the cycle of the
falling of the toner.
(2)Check the appearance of
both ends of the developer
OPC drum.
1. If both ends of the OPC drum
are contaminated with toner:
Check the life of the developer.
(In case of less than 820g, the
life may be expired.)
• Contaminated with
toner on prints part-
ly or over the whole
surface.
2.The center of the printed mat-
ter is contaminated with toner.
(1)Check whether foreign sub-
stances or toner are stuck
to the terminal (contact
point) of the developer.
(2)Check whether the state of
the terminal assembly is
normal.
2. Check whether it could be recy-
cled.
3. If it cannot be recycled:
Replace the developer.
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Troubleshooting
Fault
Signs
Cause & Check
Solution
1. If light or dark periodical black
dots occur, this is because the
developer rollers are contami-
nated with foreign substance
or paper particles.
(1)35mm interval : Charged
roller
(2)75mm interval : OPC cycle
White Black spot
• Light or dark black
dots on the image
occur periodically.
1. In case of 1 above -
Run OPC Cleaning Mode Print
4-5 times repeatedly to remove.
Especially check foreign sub-
stance on the OPC surface, then
remove them with a clean gauze
moistened with IPA(Isopropyl
Alcohol) not to damage OPC if
necessary.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
• White spots occur
in the image period-
ically.
Never use usual alcohol.
2. If white spots occur in a black
image at intervals of 75mm, or
black spots occur elsewhere,
the OPC drum is damaged or
foreign substance is stuck to
the surface.
2. In case of 2
If they are not disappeared by
running OPC Cleaning Mode
Print 4-5 times.
: at intervals of 37mm - Replace
the developer.
: at intervals of 75mm - Remove
foreign substance.
: Broken image - Replace the
developer according to care-
lessness.
3. If a black and white or graphic 3. In case of 3 - Exchange the
image is partially broken at
irregular intervals, the transfer
roller's life has been expired or
the transfer voltage is abnor-
mal.
transfer roller because the life of
the transfer roller in use has been
expired. (Check the transfer volt-
age and readjust if different.)
Recycled product • Poor appearance of 1. Poor appearance of the devel- 1. In case of 1 -
the developer.
oper.
(1)If there is an evidence of disas-
sembling the developer.
(2)If materials other than normal
parts of the developer are
added or substituted.
(1)Check the damage to label
and whether different materi-
als are used.
(2)Check the appearance of
parts of the developer, such
as frame, hopper.
• Unclean and rough
printouts.
• Bad background in
the image.
2. Unclean and rough printouts.
(1)Check whether foreign sub-
stance or toner are stuck to
the terminal (contact point) of
the developer.
(2)Check whether the state of
the terminal assembly is nor-
mal.
2. In case of 2 - If there are any
abnormals in connection with the
situation of 1.
(1)It occurs when the developer
is recycled over 2 times.
(2)If toner nearly being expired
are collected to use, it is
judged as the recycled devel-
oper.
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Troubleshooting
Fault
Signs
Cause & Check
Solution
Ghost & Image
Contamination
• The printed image
is too light or dark,
or partially contami-
nated black.
1. The printed image is too light
or dark, or partially contami-
nated black.
(1)Check whether foreign sub-
stance or toner are stuck to
the terminal(point of contact)
of the developer.
1. All of 1, 2, 3 above
(1)Remove toner and foreign sub-
stances adhered to the contact
point of the developer.
(2)The contact point of the unit
facing that of the developer
also must be cleaned.
• Totally contaminat-
edblack.
(Black image print-
ed out)
(2)Check whether the terminal
assembly is normal.
(3)If the terminal assembly is
unsafe:
• Fully stick the terminal to or
reassemble it after disassem-
bling.
• Disassemble the side plate and
push the terminal to be stuck,
then reassemble it.
• The density of print-
outs is too dark and
ghost occurs.
2. Totally contaminated black.
(Black image printed out)
(1)Check whether foreign sub-
stances are stuck to the ter-
minal(point of contact) of the
developer and the state of
assembly.
2. In case of 2
It is a phenomenon when the
OPC drum of the developer is not
electrically charged. Clean the
terminals of the charged roller,
then recheck it.
(Especially check the
charged roller terminal.)
3. The printed image is dark and 3. In case of 3
ghost occurs.
It is a phenomenon as the devel-
(1)Check foreign substance
attached to the terminal
(point of contact) of the
developer and the state of
assembly.
oping bias voltage of the devel-
oper. Clean the terminals of the
developing roller, then recheck it.
(Especially check the devel-
oping roller terminal.)
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Troubleshooting
4-6 The cause and solutions of bad environment of the software
4-6-1 The printer is not working (1)
• Description
While Power turned on, the printer is not working in the printing mode.
Check and Cause
Solution
1. Run Self-Test Mode: Turn the power on while pressing
the test printing button for 2 or 3 seconds before printing
works.
1.Check the power of the printer and perform the Self-
Test. If the test printing works, that means no prob-
lems in the printer itself. If the test printing does not
work, that means bad functioning of the printer(not
because of software). Perform DCU to check the
Error Status.
2. Check if the PC and the printer is properly connected
and the toner cartridge installed.
2. Replace the printer cable. If the problems not solved
even after the cable replaced, check the amount of
the remaining tone.
(refer to Toner Cartridge Service 4-5)
3. Printing is nor working in the Windows.
3. Check if the connection between PC and printer port
is proper. If you use windows, check if the printer dri-
ver in the controller is set up. If the printer driver is
properly set up, check in which program the printing
is not working. The best way to find out is to open the
memo pad to check the function of printing. If it is not
working in a certain program, adjust the setup the
program requires. Sometimes, the printout is normal
within the Windows basic programs, but it's not work-
ing in a particular program. In such case, install the
new driver again. If not working in the Windows basic
program, Check the setup of the port of CMOS is on
ECP. And check the address of IRQ 7 and 378
4. If the scanner needs to be connected to the printer,
first the remove the scanner from the PC to see if the
printer is properly working alone.
4. Check if the printer cable is directly connected to periph-
eral devices
Samsung Electronics
4-25
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Troubleshooting
4-6-2 The printer is not working (2)
After receiving the printing order, no response at all or the low speed of printing
occurs due to wrong setup of the environment rather than malfunction of the printer itself.
• Description
Check and Cause
Solution
1. Secure more space of the hard disk.
1. Not working with the message 'insufficient printer
memory' means hard disk space problem rather than
the RAM problem. In this case, provide more space
for the hard disk. Secure more space using the disk
utilities program.
2. Printing error occurs even if there is enough space in
the hard disk.
2. The connection of the cable and printer port is not
proper. Check if the connection is properly done and
if the parallel port in CMOS is rightly set up.
3. Check the parallel-port-related items in the CMOS
Setup.
3. As a printer port, Select ECP or SPP among
SPP(Normal), ECP, and EPP modes(increase print-
ing speed) SPP normal mode support 8-bit data
transfer, while ECP Mode transfer the 12-bit data.
4. Reboot the system to print.
4. If the regular font is not printing, the cable or the
printer driver may be defective.
Turn the PC and printer off, and reboot the system
to print again. If not solved, double-click the printer in
my computer If the regular fonts are not printed this
time again. the cable must be defective so replace
the cable with new one.
Samsung Electronics
4-26
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Troubleshooting
4-6-3 Abnormal Printing
The printing is not working properly even when the cable has no problem.
(even after the cable is replaced)
If the printer won't work at all or the strange fonts are repeated, the printer driver may be defec-
tive or wrong setup in the CMOS Setup.
• Description
Check and Cause
Solution
1. Set up the parallel port in the CMOS SETUP.
1. Select SPP(Normal) or ECP LPT Port the among
ECP, EPP or SPP in the CMOS Setup.
2. Printer Driver Error.
2. Check the printer in My Computer.(to see if the
printer driver is compatible to the present driver or
delete the old driver, if defective and reinstall the new
driver)
3. Error message from insufficient memory.
(The printing job sometimes stops or due to insufficient
virtual memory, but it actually comes from the insuffi-
cient space of the hard disk.)
3. Delete the unnecessary files to secure enough
space of the hard disk and start printing job again.
Samsung Electronics
4-27
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Troubleshooting
4-6-4 SPOOL Error
To spool which stands for "simultaneous peripheral operations online" a computer document or
task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so
that it can be printed or otherwise processed at a more convenient time (for example, when a
printer is finished printing its current document).
• Description
Check and Cause
Solution
1. Insufficient space of the hard disk in the directory
assigned for the basic spool.
1. Delete the unnecessary files to provide more space
to start printing job.
2. If the previous printing error not solved.
2. If there are some files with the extension name of
****.jnl, Delete them and Reboot the Windows to
restart printing job.
3. When expected to collide with other program.
3. Shut down all other programs except the current
one, if possible.
4. When an application program or the printer driver is
damaged.
4. Delete the printer driver completely and reinstall it.
5. When some files related to OS are damaged or virus
infected.
5 After rebooting the computer, check for viruses,
restore the damaged files and reinstall the program
to do the printing job.
6. Memory is less than suggested one.
6. Add up enough memory to the PC.
How to delete the data in the spool manager.
In the spool manager, the installed drivers and the list of the documents waiting to be printed are shown.
Select the document to be deleted and check the delete menu.
If you intend to delete the current document being printed, the data being transferred to the printer will be put
out and then the document is removed. Before choosing the document, the menu is still inactive.
Or put the document out of the list and repeat the routine as in the above or finish the spool manager.
Samsung Electronics
4-28
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Exploded Views and Parts List
5. Exploded Views and Parts List
• Deal drawings and service parts are declared for the items with higher rate
of inferiority and replaceable in the level of service description only.
• If inferiority occurs, you can replace the parts by the unit declared in deal
drawings and service items.
Way to observe Part Code & Description
Part code and Description is quoted and controlled by determined standard. Refer to this determined
standard, it will help with ordering Part.
• There ar woo kinds of Part code inscription type.
ex ) 2007-007961
ex ) JB96-01268A
R-CHIP
ELA UNIT-COVER TOP
Type 1 : Controlled by Company : It can be commonly used for all kinds of product SEC produce.
Mostly, electronics Parts.
Type 2 : Controlled by Division : It is used or one produce. Mostly, Mostly, mechanical Parts.
• A/S privately used part : It is only used for A/S .
• Ass’y part : Assembled by more than 2 Parts. If necessary part is not A/S Part, Ass’y part including
necessary par can be used. It is shown in the diagram and drawing of SVC manual.
• Ass’y part and A/S privately used Part is distinguished by part Code and Description.
The are inscription type 2. It is recognized by Part character and front side of description.
DIVISION
A/S Private
PART CODE
**81-******
DESCRIPTION
AS-*****
(JB81-00039A)
(AS-USE)
ASS’Y Part
ASS’Y Part
ASS’Y Part
**75-******
(JB75-00068A)
MEC-*****
(MEC-CHUTE)
**92-******
(JB92-01131A)
PBA ******
(PBA MAIN-CONTROLLER)
**97-******
MEA ******
(JB97-01089A)
(MEA UNIT-PULLEY IDLE)
Samsung Electronics
5-1
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Exploded Views and Parts List
5-1 Exploded Views and Parts List
• Service Parts List
O : Service available X : Service not available
No.
Description
SEC.Code
Q’ty SA
Remark
• PMO-COVER FRONT •
1
ELA UNIT-CVR FRONT
PBA SUB-LED PANEL
PMO-COVER FRONT
CBF HARNESS-FRONT PANEL
PMO-COVER PCB
PMO-GUIDE STACKER
PMO-STOPPER
PMO-COVER FRONT, SUB IMAC JC72-00843A
PMO-STACKER RX
PMO-STACKER RX
PMO-COVER TOP
PMO-COVER REAR
PMO-COVER SIDE(L)
PMO-COVER SIDE(R)
MEC-TRAY(P)
*
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
X
1-1
JC92-01280A
refer to the table
JC39-00112C
JC72-00678A
JC72-00511A
JC72-00519A
ML-1210
1-2
1-3
1-4
1-5
1-6
1-7
⇒
ML-1210/XAA
JC72-00677A
JC72-00677A
JC72-00677F
JC72-00677A
JC72-00677A
JC72-00677E
JC72-00677A
JC72-00677F
JC72-00677A
JC72-00677G
JC72-00677A
JC72-00677A
JC72-00677V
JC72-00677A
ML-1210/XAC
ML-1210/XAX
ML-1210/XEG
ML-1210/XEU
ML-1210/XEF
ML-1210/XET
ML-1210/XEC
ML-1210/XEO
ML-1210/XIL
ML-1210/XIP
ML-1210/XSA
ML-1210/XEV
ML-1210/XEN
ML-1220M ONLY
ML-1210,1250
ML-1220M
2
JC72-00302A
JC72-00302C
JC72-00522A
JC75-00094A
JC72-00523A
JC72-00524A
JC75-00099A
JC75-00099D
*
3
4
5
6
7
ML-1210,1250
ML-1220M
MEC-TRAY(P)
8
ELA UNIT-FR LOWER
PMO-FRAME LOWER
MEC-ROLLER_TRANSFER
FAN-DC
ELA HOU-FUSER ASS’Y
ELA HOU-FUSER ASS’Y
8-1
JC72-00533A
JC75-00129A
3103-001085
JC81-00424A
JC81-00423A
4713-001136
4713-001135
4712-000001
JC75-00053A
JC97-01486A
JC72-00124A
JC75-00056A
JC75-00049A
JC92-01197A
JC33-00002B
JC75-00072A
JC75-00050B
JC75-00051B
JC72-00109A
JC72-00130A
JC72-00119A
JC75-00111A
JC96-01584A
JC96-02037A
JC72-00101A
JC72-00102A
JC61-00458A
JC61-00024A
JC72-00532A
JC72-00534A
JC72-40849A
JC75-00054A
JC75-00055A
JC72-00100D
JC92-01316D
JC92-01333A
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
8-2
8-3
8-4
220V
110V
220V
110V
8-4-1 LAMP-HALOGEN
LAMP-HALOGEN
8-4-2 THERMOSTAT
8-5
8-6
8-7
8-8
8-9
ML-1250
125 / 250V
ML-1250/XAA
ML-1250/XAC
ML-1250/XEC
ML-1250/XEG
ML-1250/XEU
ML-1250/XEF
ML-1250/XET
ML-1250/XIL
ML-1250/XAX
ML-1250/XIP
ML-1250/XSA
JC72-00677B
JC72-00677B
JC72-00677M
JC72-00677B
JC72-00677B
JC72-00677L
JC72-00677B
JC72-00677N
JC72-00677B
JC72-00677M
JC72-00677B
MEC KNOCKUP-ASS’Y
MEC UNIT HOLDER PAD
PMO-CAP_PAD
MEC GEAR-PICK UP
MEC-TERMINAL
PBA MAIN-SENSOR
SOLENOID
MEC-CAM PICK UP
MEC-SIDE PAD(L)
8-10
8-11
8-12
8-13
8-14
8-15
8-16
8-17
8-18
8-19
8-20
8-21
8-22
8-23
8-24
8-25
8-26
8-27
8-28
8-29
8-30
MEC-SIDE PAD(R)
PMO-HOUSING-PICK UP
PMO-ACTUATOR-EXIT
PMO-ACTUATOR-FEED
MEC-PLATE UPPER
ELA HOU-OPEN SENSOR
ELA HOU-PTLASS’Y
PMO-BUSHING_TR(R)
PMO-BUSHING_TR(L)
SPRING-TR, L
SPRING-TR (300)
PMO-HOLDER_EXIT
PMO-COVER PTL
PMO-BUSHING SHAFT
MEC-ROLLER FEED
EMC-HOLDER FEED
PMO-HOLDER TR
PBA MAIN-CONTROLLER GDI
PBA MAIN-CONTROLLER PCL
ML-1220M
ML-1220M/XEU
ML-1220M/XEF
ML-1220M/XIL
ML-1220M/AC
JC72-00841A
JC72-00841B
JC72-00841C
JC72-00841A
9
ML-1210
ML-1250
ML-1220M
220V
110V
ML-1210/1220M
ML-1250
PBA MAIN-ML-1220M IMAC(SUB) JC92-01316C
10
11
12
SMPS-ML-1210 V2
SMPS-ML-1210 V1
SMPS-HVPS
JC44-00026A
JC44-00025A
JC44-00024A
JC44-00036A
JC96-02125A
JC31-00005B
JC59-00015A
JC59-00015B
SMPS-HVPS
ELA UNIT-RX DRIVE
MOTOR-STEP 7.5
UNIT-LSU
12-1
13
ML-1210/1220M
ML-1250
UNIT-LSU
Samsung Electronics
5-2
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Exploded Views and Parts List
5
2
1
/
M
0
2
3
0
1
2
2
1
-
1
-
L
L
M
M
7
13
2
5
8
4
8-18
1
9
8-26
8-20
11
8-22
8-23
8-30
1-5
8-21
8-24
8-12
10
8-2
1-2
1-6
8-13
8-5
8-14
1-3
8-9
8-6
8-15
8-19
8-7
8-1
1-1
1-4
8-11
8-4
8-8
8-25
8-17
1-2’
8-4-2
1-2
8-3
8-27
8-16
8-29
8-28
8-4-1
8-10
6
12-1
1-7
12
ML-1210 / ML-1250
ML-1220M
Samsung Electronics
5-3
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Exploded Views and Parts List
5-2 Front Assembly
0
SAMSUNG
11
3
2
5
ML-1210 / ML-1250
10
0’
SAMSUNG
4
10
8
ML-1220M
6
1
12
9
7
NO
DESCRIPTION
0
ELA HOU-COVER FRONT
ELA HOU-COVER FRONT
CBF-HARNESS-PANEL MAIN
PMO-COVER FRONT
PMO-GUIDE STACKER
PMO-DOOR FACE UP
PPR-SHEET PAPER GUIDE
PMO-KEY A
1
2
3
4
5
6
7
PMO-KEY B
8
PMO-LENS SED
2’
2
9
PMO-COVER PCB
10
11
12
13
PMO-STOPPER
PMO-BRKT PUSH DEVE
PBA SUB DISP-PANEL
PMO-COVER FRONT, SUB IMAC
SAMSUNG
13
ML-1210 / ML-1250
ML-1220M
Samsung Electronics
5-4
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Exploded Views and Parts List
5-3 Engine/Frame Lower Assembly
2-17
2-14
2-13
2-3
3-2
2-3-2
2-12
3-2-2
3-2-3
3-2-1
2-11
2-3-1
3-2-4
3-15
3-43
3-44
2-15
1
2-7
3-12
3-3
3-3-1
3-4
3-2-3
3-2-1
2-7-3
2-7-1
2-7-2
3-6
3-5
3-6
2-10
2-16
2-16-2
2-16-1
3-17
3
2-9
2-9-1
2-9-2
3-10-2
3-10-1
3-10
3-41
2-9-3
2-8
3-45
2-9-4
3-25
3-16
3-9
3-1
2-1
2-2
3-24
2-2-1
2-2-3
2-2-2
2-6
3-22
3-23
3-8
3-7
3-21
3-26
2-5
3-19
3-42
3-11
3-39
3-13
3-31
3-32
3-29
3-34
3-30
2-4
3-22
3-23
3-14
3-26
3-18
3-21
3-33
3-20
3-35
3-28
3-38
3-36
3-40
3-27
3-37
3-46
NO
DESCRIPTION
NO
DESCRIPTION
NO
DESCRIPTION
1
2
2-1
2-2
SMPS-HVPS
2-16-1 TERMINAL
2-16-2 SPRING-HV APOLLO
3-17
3-18
3-19
3-20
3-21
3-22
3-23
3-24
3-25
3-26
3-27
3-28
3-29
3-30
3-31
3-32
3-33
3-34
3-35
3-36
3-37
3-38
3-39
3-40
3-41
3-42
3-43
3-44
3-45
3-46
IPR-GROUND_HVPS
IPR-GROUND_FUSER
IPR-GROUND_DRIVE
CBF HARNESS-OPE GND
PMO-HOLDER_PR
ELA HOU-ENGINE ASS’Y
SOLENOID-(APOLLO)
MEC-GEAR PICKUP
PMO-GEAR_PICKUP,1
PMO-GEAR_PICKUP,2
SPRING-PICKUP,GEAR
MEC-CAM PICKUP
PMO-CAM_PICKUP
PMO-SHAFT_PICKUP
PMO-GEAR_FEED
PMO-CLUTCH_FEED
SPRING-CLUTCH
MEC-KNOCKUP ASS’Y
PMO-PLATE_KNOCKUP
PMO-CAM-KNOCKUP
IPR-BAR_KNOCKUP
SPRING-KNOCK UP
MEC-HOLDER PAD
PMO-HOLDER PAD
PMO-HOLDER_PAD
RPR-PAD FRICTION
SPRING-PAD
2-17
S-1
3
3-1
3-2
3-2-1
PCT-INSULATOR ENG B’D
SCREW-TAPTITE
ELA HOU-FRAME LOWER
PMO-FRAME LOWER
MEA ETC-HOLDER TR L
PMO-HOLDER TR
2-2-1
2-2-2
2-2-3
BEARING-PRESSURE R
SPRING-PR
2-3
MEC-ROLLER_PRESSURE
PMO-GUIDE_INPUT
RMO-RUBBER_FOOT
ELA HOU-FUSER ASS’Y220V
CBF-HARNESS FUSER
ELA HOU-MOTOR GND
PMO-BUSHING SHAFT
FAN-DC
2-3-1
2-3-2
3-2-2
3-2-3
3-2-4
PMO-BUSHING_TR(L)
SPRING-TR
IPR-PLATE_TR
2-4
2-5
2-6
2-7
3-3
MEA ETC-HOLDER TR R
PMO-HOLDER TR
PMO-BUSHING_TR(R)
SPRING-TR
3-2-1
3-3-1
3-2-3
2-7-1
2-7-2
2-7-3
3-4
PMO-CAP PLTE GU/DEV R
PMO-CAP PLTE GU/DEV L
SPRING-GUIDE DEVE
PMO-ACTUATOR_EXIT
PMO-HOLDER_EXIT
PMO-BUSHING_TERMINAL
ELA HOU-OPEN SENSOR
PMO-GEAR_83/35
3-5
3-6
3-7
3-8
3-9
3-10
SPRING-FUSER DR
PMO-GEAR_FU_IN 47
PMO-GEAR_FU_OUT 47
MEC-ROLLER FEED
PBA MAIN-SENSOR
EMC-HOLDER FEED
CBF HARNESS-MOTOR GND
IRP-BRKT FUSER DRV
PMO-HINGE FRONT(L)
PMO-HINGE FRONT(R)
PMO-COVER PTL
2-8
2-9
2-9-1
2-9-2
2-9-3
2-9-4
3-10-1 IPR-BRKT_SENSOR
3-10-2 CBF-HARNESS COVER
2-10
PMO-CAP_PAD
MEC-SIDE PAD(R)
MEC-SIDE PAD(L)
PMO-GEAR_TRANSFER
PPR-SPACER DR
2-11
2-12
2-13
2-14
2-15
2-16
3-11
IPR-GUIDE-TR
3-12
3-13
3-14
3-15
3-16
IPR-PLATE-TERMINAL
IPR-SAW_PLATE
PCT-FILM SAW
IPR-EARTH_TRANS
IPR-GROUND_GUIDE
ELA HOU-PTL
PCT-COVER SHEET LAMP
PCT-INSULATOR SENSOR B’D
MEC-TRANSFER ROLLER
MEC-TERMINAL
Samsung Electronics
5-5
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Exploded Views and Parts List
5-4 Fuser Assembly
24
30
29
27
26
28
24
23
25
17
21
0
NO
0
DESCRIPTION
ELA HOU-FUSER ASS’Y
THERMISTOR-NTC
1
2
THERMOSTAT-150C
LAMP-HALOGEN
3
7
2
4
PMO-COVER FUSER
PMO-BUSHING H/R, L
PMO-BUSHING H/R, R
PMO-COVER_THERMOSTAT
NPR-ROLLER HEAT
IPR-ELECTRODE_PLATE
IPR-GROUND_FU
S-1
13
9
5
6
12
7
20
8
9
10
11
12
13
14
PMO-GUIDE CLAW
15
15-2
15-1
ELECTRODE-WIRE,1
ELECTRODE-WIRE,S
MEA ETC-SHAFT EXIT
PMO-SHAFT_EXIT(Z15)
RMO-RUBBER_EXIT
PMO-ROLLER_IDLE EXIT
IPR-PIN ROLLER EXIT
SPRING-EXIT
4
16
18
1
S-2
14-1
14-1
14-2
15
15-1
16
17
14-2
22
10
11
17
18
19
20
21
22
23
24
25
26
27
28
29
30
S-1
S-2
PMO-GEAR_EXIT_DRV16
PMO-GEAR_EXIT_IDLE
PMO-GEAR_FUSER
LABEL (R)-CAU_HOT_FU
SPRING-EXIT DOWN
SPRING-ES, GUIDE CLAW
GEAR-EXIT F/DOWN
BEARING-EXIT FU L
PMO-COVER FUSER F/DOWN
PMO-HOLDER_EXIT_DOWN
PMO-EXIT_DOWN_L
PMO-EXIT_DOWN_S
RMO-RUBBER-KICKER
MEC-UNIT_EXIT, F_DOWN
SCREW TAPTITE
14
S-1
5
3
S-1
8
19
6
SCREW TAPTITE
Samsung Electronics
5-6
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Exploded Views and Parts List
5-5 Shield Engine Unit Assembly
NO
0
DESCRIPTION
ELA HOU-SHIELD ENGINE
MEC-SHIELD BRKT CONTROLLER
IPR-SHIELD ENGINE
IPR-BRKT CONTROLLER
PCT-INSULATOR SMPS
CBF HARNESS-INLET ASS’Y
SCREW-MACHINE
1
1-1
1-2
0
2
3
S-1
S-2
S-3
SCREW-TAPTITE
SCREW-TAPTITE
2
1
S-1
3
S-3
S-2
1-1
1-2
Samsung Electronics
5-7
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Exploded Views and Parts List
5-6 RX Drive Assembly
NO
0
DESCRIPTION
ELA HOU-RX DRIVE
MOTOR-STEP
0
1
2
PMO-GEAR_71/28
PMO-GEAR_73/22
PMO-GEAR_132/19
IPR-BRKT_MOTOR
IPR-BRKT_GEAR
CBF-HARNESS_MOTOR
SCREW-MACHINE
3
4
7
5
4
5
6
7
6
S-7
1
2
3
S-7
S-7
5-7 Plate-Upper Unit Assembly
NO
0
DESCRIPTION
MEC-PLATE UPPER
IPR-UPPER-PLATE
1
2
IPR-PLATE SPRING DEV
MEA ETC-ROLLER PICKUP
PMO-HOUSING_PICKUP
RMO-ROLLER_PICKUP
PMO-IDLE_PICKUP
MEA ETC-IDLE FEED
PMO-HOLDER_PICKUP
SPRING-FEED
3
0
6
3-1
3-2
3-3
4
4-1
4-2
4-3
PMO-HOLDER_IDLE,FEED
ICT-ROLLER_IDLE,FEED
CABLE CLAMP
5
6
S-1
S-9
SCREW TAPTITE
SCREW TAPTITE
4
1
3-3
4-1
4-2
4-3
3-2
3
4
3-1
4-1
3-3
2
4-2
4-3
2
5
Samsung Electronics
5-8
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Block Diagram
6. Block Diagram
6-1. Block Diagram(GDI)
MAIN
POWER
SWI TCH
+5V
POWER
CORD
USB
SMPS
74LVX161284
+24V
FLASH
MEMORY
(0 .5MB)
Line
PC
I N-LET
IEEE 1284 CABLE
EXI T
Transc ei v er
N
SE SOR
MOTOR
SDRAM
(8MB)
Power
On
Eng i ne
SOLENOIDE
Re s e t
VOLTAGE
FAN
DETECT OR
C P U
DEV_FUSE
Jupiter3
Crystal
10MHz
S3C46M0X
Mai n
Clock
LSU
FS781BZB
Vi deo
Clock
PANEL
B' D
Osci l lator
44 MHz
4 LED
MHV
MHVPWM
BI ASPW M
THVPWM
OPC GND
SUPPLY
3
KEY
BUFFER
HVPS
B' D
DEV
TH V
Samsung Electronics
6-1
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Block Diagram
6-2. Block Diagram(PCL)
MAIN
Oscillator
48 MHz
POWER
SWITCH
+5V
POWER
CORD
USB
SMPS
+24V
USB Driver
USBN9602-28M
FLASH
MEMORY
(2MB)
IN-LET
PC
IEEE 1284 CABLE
EXIT
N
SE SOR
MOTOR
SDRAM
( 4MB)
Power
On
Reset
SOLENOID
Eng i ne
VOLTAGE
DETECTOR
Option
Up to
FAN
DEV_FUSE
68MB
C P U
Main
74HCT273
74ACT273
S3C46C0X01
Clock
Oscillator
20 MHz
LSU
Devided by
74HC406ON
Video
Clock
PANEL
B' D
Oscillator
44 MHz
Crystal
6.7149 MHz
4 LED
MHV
OPC GND
SUPPLY
3
KEY
MHVPWM
HVPS
B' D
BI ASPW M
THVPWM
DEV
TH V
Samsung Electronics
6-2
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Connection Diagram
7. Connection Diagram
7-1. Connection Diagram(GDI)
+24V_T
+24V GND
*PMOTOR
+3. 3V
EXT_CLK
* HSYNC
+5V
+5V GND
* LD_ON
VDO
+5V GND
1
2
1
2
3
4
5
IEEE1284
COMPATI ABLE
CABLE
POLYGON
MOTOR
3
4
5
36
PI N
J1
LSU
6
1
CN9
7
2
8
3
4
5
6
LD DIODE
9
10
11
4PI N
HOST
+5V
+5V GND
LED_ERROR
LED_PAPER
LED_DATA
LED_TONER
* KEY_TONER
* KEY_CANCEL
USB CABLE
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
CONN-
CN3
ECTO R
f or
COMPUTER
LED
USB
CN13
DISPLAY
PANEL
* KEY_DEMO
+5V
1
1
2
3
4
DCU_DATA
DCU_CLK
+5V GND
2
DCU
1
CN
3
4
+5V
PTL
1
2
1
2
GDICN6
Main
PTL LED ARRAY
+5V
*P EMPT Y
* FEED
+5V GND
1
1
SENSOR
BOARD
2
3
4
2
3
4
CN7
Board
G
+5V ND
+5V
+5V GND
+5V
+5V GND
+5V
1
2
1
2
3
3
4
4
5
5
6
6
+24V GND
+24V
+24V GND
+24V
+24V GND
+24V
EXIT
+24VS
FUSER ON
+24VS
* EGMOT_B1
CLUTCH
EGMOT_PHB
FA N
DEV_FUSE
EGMOT _A1
* NEW_DEVE
EGMOT PHA
7
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
FUSER
8
9
CN502
CN1
+24V
Not Used
+24VS
SMPS
1
2
3
1
2
3
COVER
SW ITCH
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CN11
CN12
CN5
CN5
THERM_A
THERM_B
1
2
1
2
THERMI STOR
SOL E-
NOID
+24V_T
+24V GND
THV PWM
*THV_EA
THVRE AD
* M HVPWM
BI ASPW M
+5V
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
ST EP-
PING
ENGINE
N
C 2
*
M
O
TO R
CN8
_
HV PS
DEV_FUS E
FAN
CN3
CN4
+5V GND
ENGI NE + SMPS
Unification
B'd
Samsung Electronics
7-1
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Connection Diagram
7-2. Connection Diagram(PCL)
+24V_SLEEP
1
2
1
2
3
4
5
+24V GND
PMOTOR *
LREADY*
EXT_CLK
HSYNC*
+5V
+5V GND
LD_ON*
VDO
IEEE1284
COMPATI ABLE
CABLE
POLYGON
MOTOR
3
4
5
36
PI N
J1
LSU
6
1
CN12
7
2
8
3
4
5
6
LD DIODE
9
10
11
+5V GND
4PI N
HOST
+5V
+5V GND
USB CABLE
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
CONN-
CN7
ECTO R
f or
COMPUTER
LED_ERROR
LED_PAPER
LED_DATA
LED_TONER
KEY_TONER*
KEY_CANCEL*
KEY_DEMO*
LED
USB
CN5
CN4
DISPLAY
PANEL
+5V
1
1
2
3
4
DCU_DATA
DCU_CLK
+5V GND
2
DCU
9
CN
3
4
+5V
PTL
1
2
1
2
PTL LED ARRAY
PCL
Main
Board
+5V
PEMPTY*
FEED_SENSOR*
+5V GND
1
1
SENSOR
BOARD
2
3
4
2
3
4
CN6
+5V GND
+5V
+5V GND
+5V
+5V GND
+5V
+24V GND
+24V
+24V GND
+24V
+24V GND
+24V
EXIT
+24VS
FUSER ON
+24VS
MOTOR B*
CLUTCH
MOTOR_PB
FAN
DEV_FUSE
MOTOR_A*
NEW_DVE*
MOTOR_PA
1
2
1
2
3
3
4
4
5
5
6
6
7
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
FUSER
8
9
CN502
CN1
+24V
Not Used
+24VS
SMPS
1
2
3
1
2
3
COVER
SW ITCH
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CN8
CN3
CN5
THERM_A
THERM_B
1
2
1
2
CN11
CN2
THERMI STOR
SOL E-
NOID
+24V_SLEEP
+24V GND
THV PWM
THV_EN*
THVRE AD
M HVPWM*
BI ASPW M
+5V
1
2
3
4
5
6
7
8
9
1
2
ST EP-
PING
ENGINE
N
C 2
3
4
5
6
7
8
9
M
O
TO R
HV PS
DEV_FUS E
FAN
CN3
CN4
+5V GND
ENGI NE + SMPS
Unification
B'd
Samsung Electronics
7-2
Download from Www.Somanuals.com. All Manuals Search And Download.
Repair Manual
LASER PRINTER
ML-1200 Series
CONTENTS
1. Block Diagram
2. Connection Diagram
3. Schematic Diagrams
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BLOCK DIAGRAM
1. Block Diagram
1.1 GDI Block Diagram(ML-1210/ML-1220M)
1
Repair Manual
1-1
Samsung Electronics
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BLOCK DIAGRAM
1.2 PCL Block Diagram(ML-1250)
Repair Manual
1-2
Samsung Electronics
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CONNECTION DIAGRAM
2. Connection Diagram
2.1 GDI Connection Diagram(ML-1210/ML-1220M)
2
+24V_T
+24V GND
*PMOTOR
+3. 3V
EXT_CLK
* HSYNC
+5V
+5V GND
* LD_ON
VDO
+5V GND
1
2
3
4
5
6
7
8
1
2
3
4
5
1
2
3
4
5
IEEE1284
COMPATI ABLE
CABLE
POLYGON
MOTOR
36
PI N
J1
LSU
CN9
LD DIODE
9
10
11
6
4PI N
HOST
USB CABLE
+5V
+5V GND
LED_ERROR
LED_PAPER
LED_DATA
LED_TONER
* KEY_TONER
* KEY_CANCEL
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
CONN-
ECTO R
f or
USB
CN3
COMPUTER
LED
CN13
DISPLAY
PANEL
* KEY_DEMO
+5V
1
1
2
3
4
DCU_DATA
DCU_CLK
+5V GND
2
DCU
1
CN
3
4
+5V
PTL
1
2
1
2
GDICN6
Main
PTL LED ARRAY
+5V
*P EMPT Y
* FEED
+5V GND
1
1
SENSOR
BOARD
2
3
4
2
CN7
Board
G
+5V ND
+5V
+5V GND
+5V
+5V GND
+5V
1
1
3
4
2
3
4
5
6
7
2
3
4
5
6
7
+24V GND
+24V
+24V GND
+24V
+24V GND
+24V
EXIT
+24VS
FUSER ON
+24VS
* EGMOT_B1
CLUTCH
EGMOT_PHB
FA N
DEV_FUSE
EGMOT _A1
* NEW_DEVE
EGMOT PHA
FUSER
CN502
8
8
+24V
Not Used
+24VS
SMPS
CN5
1
2
3
1
2
3
9
9
COVER
SW ITCH
10
10
CN11
CN12
11
12
13
14
15
16
17
18
19
20
21
22
11
12
13
14
15
16
CN5
THERM_A
THERM_B
1
2
1
2
THERMI STOR
17
SOL E-
NOID
CN1
18
19
20
21
22
23
+24V_T
+24V GND
THV PWM
*THV_EA
THVRE AD
* M HVPWM
BI ASPW M
+5V
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
ST EP-
ENGINE
PING
N
C 2
*
M
O
TO R
CN8
23
24
_
HV PS
DEV_FUS E
FAN
24
CN3
CN4
+5V GND
9
9
ENGI NE + SMPS
Unification
B'd
Repair Manual
2-1
Samsung Electronics
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CONNECTION DIAGRAM
2-2 PCL Connection Diagram(ML-1250)
+24V_SLEEP
1
2
3
4
5
1
2
+24V GND
PMOTOR *
LREADY*
EXT_CLK
HSYNC*
+5V
+5V GND
LD_ON*
VDO
IEEE1284
COMPATI ABLE
CABLE
POLYGON
MOTOR
3
4
5
36
PI N
J1
LSU
1
6
CN12
2
7
8
3
4
5
6
LD DIODE
9
10
11
+5V GND
4PI N
HOST
USB CABLE
+5V
+5V GND
LED_ERROR
LED_PAPER
LED_DATA
LED_TONER
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
CONN-
ECTO R
f or
CN7
COMPUTER
LED
USB
CN5
CN4
DISPLAY
PANEL
KEY_TONER*
KEY_CANCEL*
KEY_DEMO*
+5V
1
1
2
3
4
DCU_DATA
DCU_CLK
+5V GND
2
DCU
9
CN
3
4
+5V
PTL
1
2
1
2
PTL LED ARRAY
PCL
Main
Board
+5V
PEMPTY*
FEED_SENSOR*
+5V GND
1
1
SENSOR
BOARD
2
3
4
2
3
4
CN6
+5V GND
+5V
+5V GND
+5V
+5V GND
+5V
+24V GND
+24V
+24V GND
+24V
+24V GND
+24V
EXIT
+24VS
FUSER ON
+24VS
MOTOR B*
CLUTCH
MOTOR_PB
FAN
DEV_FUSE
MOTOR_A*
NEW_DVE*
MOTOR_PA
1
2
1
2
3
3
4
4
5
5
6
6
7
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
FUSER
8
9
CN502
CN1
+24V
Not Used
+24VS
SMPS
1
2
3
1
2
3
COVER
SW ITCH
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CN8
CN3
CN5
THERM_A
THERM_B
1
2
1
2
CN11
CN2
THERMI STOR
SOL E-
NOID
+24V_SLEEP
+24V GND
THV PWM
THV_EN*
THVRE AD
M HVPWM*
BI ASPW M
+5V
1
2
3
4
5
6
7
8
9
1
2
STEP-
PING
ENGINE
N
C 2
3
4
5
6
7
8
9
M
O
TO R
HV PS
DEV_FUS E
FAN
CN3
CN4
+5V GND
ENGI NE + SMPS
Unification
B'd
Repair Manual
2-2
Samsung Electronics
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SCHEMATIC DIAGRAMS
3. Schematic Diagrams
3.1 GDI Main Circuit Diagram (1/5)
3
Repair Manual
3-1
Samsung Electronics
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SCHEMATIC DIAGRAMS
Main Circuit Diagram (2/5)
Repair Manual
3-2
Samsung Electronics
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SCHEMATIC DIAGRAMS
Main Circuit Diagram (3/5)
Repair Manual
3-3
Samsung Electronics
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SCHEMATIC DIAGRAMS
Main Circuit Diagram (4/5)
Repair Manual
3-4
Samsung Electronics
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SCHEMATIC DIAGRAMS
Main Circuit Diagram (5/5)
Repair Manual
3-5
Samsung Electronics
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SCHEMATIC DIAGRAMS
3.2 PC L Main Circuit Diagram (1/9)
Repair Manual
3-6
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL Main Circuit Diagram (2/9)
Repair Manual
3-7
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL M a i n Circuit Diagram (3/9)
Repair Manual
3-8
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL Main Circuit Diagram (4/9)
Repair Manual
3-9
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL MainCircuit Diagram (5/9)
Repair Manual
3-10
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL Main Circuit Diagram (6/9)
Repair Manual
3-11
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL Mai n Circuit Diagram (7/9)
Repair Manual
3-12
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL M a i n Circuit Diagram (8/9)
Repair Manual
3-13
Samsung Electronics
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SCHEMATIC DIAGRAMS
PCL M a i n Circuit Diagram (9/9)
Repair Manual
3-14
Samsung Electronics
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3.3 HVPS Circuit Diagram (1/2)
5V
18V
24VS
C402
103
R407
240K
R401
100
T401
KAB-006
D401
4KV
C404
R426
R405
220KF
3KV 471
R411
2.2K
MGR1/2W 100KF
R422
5.6K
1
7
6
MHV
R403
R404
33K
R413
MGR1/2W 6MF
110KF
12
13
Q401
Q402
D526-Y
+
-
14
5
2
A708-Y
C406
3KV 471
MHV-PWM
3
R416
C405
D402
4KV
4
D111
2KV 680
MGR1/2W 15MF
R408
47K
1N4148
U1-D
KA324
R402
56KF
CN1-#6
U2-B
7407
R414
MGR1/2W 6MF
4
R412
2K
R409
430
C408
104
C401
222
OPC
R406
2.2KF
C403
333
R410
1W
VR401
50K
3
ZD401
1W 130V
R417
MGR1/2W 15MF
D403
1N4148
24VS
T501
KAB-006
D502
4KV
5V
18V
R516
MGR1/2W 50K
R514
MGR1/2W 15MF
1
7
SUPPLY
R510
47K
C503
R501
5.6K
104
Q502
D526-Y
R503
100
R508
86.6KF
5
2
6
C506
3KV 471
ZD501
1W 100V
C505
2KV 680
Q501
BIAS-PWM
CN1-#7
A708-Y
1
2
9
-
R507
27K
8
4
R502
2.2K
DEV
10
R515
MGR1/2W 15MF
U2-A
7407
+
R519
R511
47K
R512
430
MGR1/2W 50K
R505
U1-C
100KF
R506
100KF
KA324
C501
104
R517
MGR1/2W 15MF
R504
2K
C502
222
R513
1W 3
C504
333
R509
12KF
D501
1N4148
VR501
50K
CN1
GIL-S-9P-S2T2-EF
24VS
U3
KA7818
24VS
1
2
3
4
A-GND
THV-PWM
THV-EA
TITLE
SAMSUNG ELECTRONICS
SWALLOW-HVPS
IN
OUT
18V
THV-READ
MHV-PWM
BIAS-PWM
5V
D-GND
5
6
7
8
9
+
GND
DESIGNED CHECKED APPROVED DRW. NO
C1
104
REV.
1.0
C2
104
C3
35V 47uF
REF. NO
JC
JH.CHO
1 OF 2
SIZE A4
DATE 01/01/04
Repair Manual
3-15
Samsung Electronics
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HVPS Circuit Diagram (2/2)
T201
HVT-2A
C208
6KV 471
C206
6KV 471
24VS
5V
18V
1
7
6
D204
6KV
D206
6KV
R201
10K
D207
6KV
D205
6KV
R206
100
Q204
D526-Y
5
2
THV-PWM
13
C205
6KV 101
12
11
10
D201
U1-B
C209
6KV 471
C207
6KV 471
R208
30KF
1N4148
KA324
R205
1K
CN1-#3
R213
2.2K
5
6
U2-F
7407
U2-E
7407
Q203
A708-Y
+
7
4
C201
103
-
THV
R209
110KF
24VS
R207
2K
R215
430
R216
R218
MGR1/2W 100KF
BR1/2W 30MJ
+
R214
1.2K
C101
35V 47uF
C202
331
R210
D202
510KF 1N4148
VR201
50K
C204
473
R217
BR1/2W 200MG
R212
470K
C203
472
D203
1N4148
ZD201
5.6V
ZD202
7.5V
5V
CN1-#8
18V
R211
1MF
18V
R3
1/2W 560
ZD1
5.6V
C7
104
T301
KAB-006
D304
4KV
C307
3KV 471
R309
2.2K
Q301
A708-Y
1
7
6
THV-EA
CN1-#4
9
8
R315
BR1/2W 30MJ
U2-C
7407
R307
33K
5
2
C306
2KV 680
D303
4KV
C308
3KV 471
Q303
D526-Y
18V
D-GND
24VS
4
D301
1N4148
R310
2.2K
C4
104
R314
2.2KF
R308
33K
R311
100KF
VR302
5K
Q302
A708-Y
3
THV-READ
CN1-#5
+
1
R302
33K
R303
100KF
2
C305
333
-
R306
26.1KF
R316
1KF
U1-A
KA324
R304
200KF
C303
333
R317
2KF
R305
5.1KF
C302
102
R301
470K
D302
1N4148
C304
500V 103
VR301
10K
TITLE
SAMSUNG ELECTRONICS
SWALLOW-HVPS
C301
222
DESIGNED CHECKED APPROVED DRW. NO
REV.
1.0
JC
REF. NO
JH.CHO
2 OF 2
SIZE A4
DATE 01/01/04
Repair Manual
3-16
Samsung Electronics
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3.4 SMPS Circuit Diagram (110V)
R502
1/2W
560K
V501
SCK-054
F501
125V 8A
F502
125V 3A
T501
EER2828
R518
22
C522
1KV 102
LF501
APOLLO12
LF502
APOLLO12
CN501
L
C501
D504
ER1002FCT
R517
C508
R509
3W
47K
222MAD
R505
1W
82
-
+
F.G
N
1W
47K
CN5-7,9,11
+24V 1.8A
C511
BD501
FL406
12
1
C520
C521
R519
5W
C519
104
TNR501
C502
222MAD
TNR502 C503
C505
104
N24
11
NP
500
3
C512
R506
1W
D502
CN5-8,10,12
GND
47K
L501
300uH
R501
C504
333
1W 47
R514
C514
FUSIBLE
U502
STRT-G6153
D501
ER102
22
1KV 102
R507
30
B501
L502
10uH
CN502
5
1
2
1
DRAIN VCC
U501
BTA12-600
APOLLO12
CN5-1,3,5
R512
330
D503
R515
+5V 1.0A
SB1040FCT
2.2K-F
R521 R520
150 47K
R503
1/4W
100
R508
C507
104
1W 180
PC501
K1010H
R511
4.3K
C518
6
10
C517
104
FUSIBLE
C513
1uF
N5
7
NB
5
EXIT
CN5-14
C515
10V
1000uF
C509
C510
PC502
KMOC3063
R504
68K
R516
2.2K-F
1
R510
OP501
ITR8406-S
U503
KA431
1W
0.3
R513
1/2W
1.5K
PC501
K1010H
CN5-2,4,6
GND
C506
222MAD
+5V
+24VS
CN5-13,15
NO MARKING RESISTOR 1/4W-J (5%)
+24VS2
FUSER_ON
CN5-16
C8
C3
+24VS
D3
+24V
CN4
CN1
D2
3
2
1
C1
331
GND
GND
2
1
11
5
U1
A2918SWH
35301-0350
35303-0250
CN2
13
8
1
17
EGMOT_PHA
EGMOT_PHB
PHASE1
PHASE2
1A
1B
1
2
Q3
1008-Y
R12
510
Q1
1008-Y
R13
2.2K
CLUTCH
14
7
2
4
FAN
2A
2B
+EGMOT_A1
+EGMOT_B1
+ENABLE1
+ENABLE2
3
4
R2
5.6K
R1
5.6K
C2
35303-0450
12 16
5
15 18
3
6
9
+5V
331
GND
GND
R7
1.2K
R8
1K
R10
1K
C7
103
C5
C6
103
R11
56K
R6
R15
56K
C4
331
R9
R5
17.4K-F
331
GND
GND
GND GND
Repair Manual
3-17
Samsung Electronics
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SCHEMATIC DIAGRAMS
SMPS Circuit Diagram (220V)
R502
1/2W
560K
V501
SCK-054
F501
250V 5A
F502
250V 2A
C522
1KV 102
R518
22
T501
EER2828
LF501
APOLLO12
LF502
APOLLO12
CN501
L
D504
ER1002FCT
C501
R517
R509
3W
47K
C508
222MAD
R505
1W
82
-
+
F.G
N
1W
100K
CN5-7,9,11
C511
+24V 1.8A
BD501
FL406
12
1
C520
C521
R519
5W
C519
104
TNR501
C502
C503
C505
104
N24
11
NP
222MAD
500
3
C512
R506
1W
D502
CN5-8,10,12
GND
100K
L501
300uH
R501
C504
1W 47
R514
C514
1KV 102
333
FUSIBLE
U502
D501
ER102
22
R507
30
B501
APOLLO12
L502
10uH
STRT-G6153
CN502
1
5
2
1
DRAIN
VCC
U501
BTA12-600
CN5-1,3,5
R512
330
D503
R515
+5V 1.0A
SB1040FCT
2.2K-F
R521 R520
R503
1/4W
22
R508
C507
104
150
47K
1W 180
PC501
K1010H
R511
4.3K
6
10
N5
C518
C517
104
FUSIBLE
C513
1uF
NB
5
EXIT
CN5-14
C515
10V
C509
C510
PC502
7
1000uF
KMOC3063
R504
22K
R516
2.2K-F
1
R510
OP501
ITR8406-S
U503
KA431
1W
0.6
R513
1/2W
1.5K
PC501
K1010H
CN5-2,4,6
GND
C506
332MAD
+5V
+24VS
CN5-13,15
NO MARKING RESISTOR 1/4W-J (5%)
+24VS2
FUSER_ON
CN5-16
C8
C3
+24V
+24VS
D3
CN4
CN1
D2
3
2
1
GND
C1
331
GND
2
11
5
1
U1
A2918SWH
35303-0250
35301-0350
CN2
13
8
1
17
1A
1B
EGMOT_PHA
EGMOT_PHB
PHASE1
PHASE2
1
2
Q1
1008-Y
Q3
1008-Y
R12
510
R13
2.2K
CLUTCH
14
7
2
4
FAN
+ENABLE1
+ENABLE2
2A
2B
+EGMOT_A1
+EGMOT_B1
3
4
R2
5.6K
R1
5.6K
C2
35303-0450
+5V
331
12 16
5
15 18
3
6
9
GND
R7
1.2K
R10
1K
C7
R8
1K
C5
C6
103
R11
56K
R6
R15
56K
C4
331
R9
17.4K
R5
331
103
GND
GND
GND GND
Repair Manual
3-18
Samsung Electronics
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SCHEMATIC DIAGRAMS
3.5 Panel Circuit Diagram
Repair Manual
3-19
Samsung Electronics
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This manual is made and
described centering around
circuit diagram
and circuit description needed
in the repair center
in the form of appendix.
Samsung Electronics Digital Printing
CS Group
Copyright (c) 2001. 10
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Contents
CONTENTS
1. Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(1-1)
1-1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(1-1)
1-2 Precautions on Disassembly and Reassembly . . . . . . . . . . . . . . .page(1-1)
1-3 Tools for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(1-2)
2. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(2-1)
3. Disassembly and Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-1)
3-1 Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-1)
3-2 LED Panel PBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-2)
3-3 LSU(Laser Scanning Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-2)
3-4 Transfer Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-3)
3-5 Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-3)
3-6 HVPS Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-4)
3-7 Fuser Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-4)
3-8 Thermostat and Halogen Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-5)
3-9 SMPS Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-6)
3-10 Main Board and Sensor Board . . . . . . . . . . . . . . . . . . . . . . . . . . .page(3-7)
4. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(4-1)
4-1 How to use DCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(4-2)
4-2 The cause and solution of Bad image . . . . . . . . . . . . . . . . . . . . . .page(4-5)
4-3 The cause and solution of the bad discharge. . . . . . . . . . . . . . . . .page(4-12)
4-4 The cause and solution of the malfunction . . . . . . . . . . . . . . . . . . .page(4-16)
4-5 Toner Cartridge Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(4-21)
4-6 The cause and solutions of bad environment of the software . . . .page(4-25)
5. Exploded Views and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-1)
5-1 Expolded Views and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-2)
5-2 Front Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-4)
5-3 Engine/Frame Lower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-6)
5-4 Fuser Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-8)
5-5 Shield Engine Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-10)
5-6 RX Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-12)
5-7 Plate-Upper Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(5-14)
6. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(6-1)
6-1 Block Diagram(GDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(6-1)
6-2 Block Diagram(PCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(6-2)
7. Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(7-1)
7-1 Connection Diagram(GDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(7-1)
7-2 Connection Diagram(PCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(7-2)
Samsung Electronics
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