Panasonic CRT Television CT 32SX31CE User Manual

ORDER NO. MTNC010524C1  
B5  
Service Manual  
Color Television  
Main Manual  
(NA8ML)  
Panasonic  
Models  
Chassis  
CT-32SX31E  
CT-32SX31UE  
CT-32SX31CE  
CT-36SX31E  
CT-36SX31UE  
CT-36SX31CE  
BP371  
BP371  
BP371  
BP372  
BP372  
BP372  
This Service manual is issued as a service guide for the models of the NA8ML family listed above. Included in this  
manual are a set of schematic, block diagrams, functional descriptions, alignment procedures, disassembly  
procedures and a complete parts list.  
WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public.  
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.  
Products powered by electricity should be serviced or repaired only by experienced professional technicians.Any attempt to  
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”  
The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual.  
Copyright 2001 by Matsushita Electric Corporation of  
America. All rights reserved. Unauthorized copying  
and distribution is a violation of law.  
®
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Important Safety Notice . . . . . . . . . . . . . . . . . . 2  
Instructional Flow Chart for  
Serviceman Mode . . . . . . . . . . . . . . . . . . . 24  
Safety Precautions . . . . . . . . . . . . . . . . . 2  
General Guidelines. . . . . . . . . . . . . . . . . 2  
Leakage Current Cold Check . . . . . . . . . 2  
X-ray Radiation. . . . . . . . . . . . . . . . . . . . 2  
Horizontal Oscillator  
Service Adjustments  
(Electronic Controls). . . . . . . . . . . . . . . . . 27  
Sub-Contrast Adjustment . . . . . . . . . . . 27  
Sub-Brightness (B02) . . . . . . . . . . . . . . 27  
Tint/Color Adjustment . . . . . . . . . . . . . . 27  
PIP Sub-Contrast Adjustment (P03). . . 28  
Color Temperature Adjustment. . . . . . . 28  
Complete Adjustment . . . . . . . . . . . . . . 28  
Horizontal Centering (D00). . . . . . . . . . 29  
E-W PCC Adjustment (D0C). . . . . . . . . 29  
Corner PCC Adjustment (D0B). . . . . . . 29  
H-Size Adjustment (D0D) . . . . . . . . . . . 29  
V-Size and V-Position Adjustment  
Disable Circuit Test . . . . . . . . . . . . . 2  
Service Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Leadless Chip Component  
(surface mount) . . . . . . . . . . . . . . . . 4  
Component Removal . . . . . . . . . . . . . . . 4  
Chip Component Installation . . . . . . . . . 4  
How to Replace Flat-IC . . . . . . . . . . . . . 4  
Horizontal Oscillator Disable Circuit . . . . 5  
(D01 & D06) . . . . . . . . . . . . . . . . . . 29  
V-Linearity Adjustment (D03) . . . . . . . . 29  
V-Correction Adjustment (D02). . . . . . . 30  
MTS Circuit Adjustments . . . . . . . . . . . 30  
Input Level Adjustment (M00). . . . . . . . 30  
Stereo Separation Adjustment  
Receiver Feature Table . . . . . . . . . . . . . . . . . . . 6  
(M01 & M02) . . . . . . . . . . . . . . . . . 30  
Clock Adjustment (S07) . . . . . . . . . . . . 31  
Service Adjustments  
Location of Controls (Receiver). . . . . . . . . . . . 7  
Quick Reference Control Operation . . . . 7  
Quick Reference. . . . . . . . . . . . . . . . . . . 7  
Control Operation . . . . . . . . . . . . . . . . . . 7  
(Mechanical Controls) 31  
Focus (part of T551) . . . . . . . . . . . . . . . 31  
Location of Controls (Remote). . . . . . . . . . . . . 8  
Audio Signal Path Block Diagram . . . . . . . . . 32  
Video Signal Path Block Diagram . . . . . . . . . 33  
IIC Connection . . . . . . . . . . . . . . . . . . . . . . . . . 34  
Description of Connectors . . . . . . . . . . . . . . . 35  
IC101 IN/OUT Pins and Functions (VCJ) . . . . 36  
Component Identification . . . . . . . . . . . . . . . . 37  
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40  
Disassembly for Service. . . . . . . . . . . . . . . . . . 9  
Back Cover. . . . . . . . . . . . . . . . . . . . . . . 9  
A-Board - Main Chassis . . . . . . . . . . . . . 9  
L-Board - CRT Output . . . . . . . . . . . . . . 9  
Speakers . . . . . . . . . . . . . . . . . . . . . . . . 9  
Keyboard Push Button Assembly. . . . . . 9  
Disassembly for CRT Replacement . . . . 9  
CRT Replacement . . . . . . . . . . . . . . . . . 9  
Back Cover Removal . . . . . . . . . . . . . . 11  
Chassis Service Adjustment Procedures . . . 12  
Schematics, Voltages and waveforms  
L-Board Voltages,  
140.0V B+ Voltage Confirmation . . . . . 12  
Source Voltage Chart . . . . . . . . . . . . . . 12  
High Voltage Check . . . . . . . . . . . . . . . 12  
PCB & schematics . . . . . . . . . . . . . . . . . 53  
A-Board (Left Portion) . . . . . . . . . . . . . . . . . 54  
Purity and Convergence Procedure . . . . . . . 13  
A-Board (Right Portion). . . . . . . . . . . . . . . . 55  
A-Board PCB. . . . . . . . . . . . . . . . . . . . . . . . 56  
A-Board Voltages . . . . . . . . . . . . . . . . . . . . 57  
D-Board schematics . . . . . . . . . . . . . . . . . . 58  
D-Board PCB & voltages. . . . . . . . . . . . . . . 59  
G-Board schematics . . . . . . . . . . . . . . . . . . 60  
G-Board PCB & voltages . . . . . . . . . . . . . . 61  
A-Board Waveforms . . . . . . . . . . . . . . . . . . 62  
When the CRT or the Yoke is Replaced 13  
Initial Center Static Convergence. . . . . 14  
Purity Adjustment . . . . . . . . . . . . . . . . . 14  
Dynamic Corvergence Adjustment. . . . 14  
DY(YHC, YV, XV) Adjustment . . . . . . . 14  
Permalloy Convergence Corrector  
Strip (Part No. 0FMK014ZZ) . . . . . 15  
DAF Adjustment . . . . . . . . . . . . . . . . . . 15  
Serviceman Mode (Electronic Controls) 17  
Exiting the Serviceman Mode. . . . . . . . 17  
Entering Serviceman  
Mode (Back-Open Method) . . . . . . 23  
- 3 -  
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Service Notes  
Note: These components are affixed with glue. Be careful not to break or damage any foil under the  
component or at the pins of the ICs when removing. Usually applying heat to the component for a  
short time while twisting with tweezers will break the component loose.  
Leadless Chip Component  
(surface mount)  
How to Replace Flat-IC  
- Required Tools -  
Chip components must be replaced with identical chips  
due to critical foil track spacing. There are no holes in  
the board to mount standard transistors or diodes.  
Some chips capacitor or resistor board solder pads  
may have holes through the board, however the hole  
diameter limits standard resistor replacement to 1/8  
watt. Standard capacitor may also be limited for the  
same reason. It is recommended that identical  
components be used.  
Soldering iron  
De-solder braids  
Magnifier  
Iron wire or small awl  
1. Remove the solder from all of the pins of a Flat-IC  
by using a de-solder braid.  
De-Solder  
Braid  
Flat-IC  
Chip resistor have a three digit numerical resistance  
code - 1st and 2nd significant digits and a multiplier.  
Example: 162 = 1600 or 1.6kresistor, 0 = 0(jumper).  
Chip capacitors generally do not have the value  
indicated on the capacitor. The color of the component  
indicates the general range of the capacitance.  
Chip transistors are identified by a two letter code. The  
first letter indicates the type and the second letter, the  
grade of transistor.  
2. Put the iron wire under the pins of the Flat-IC and  
pull it in the direction indicated while heating the  
pins using a soldering iron. A small awl can be  
used instead of the iron wire.  
Iron  
Wire  
Awl  
Chip diodes have a two letter identification code as per  
the code chart and are a dual diode pack with either  
common anode or common cathode. Check the parts  
list for correct diode number.  
Component Removal  
1. Use solder wick to remove solder from component  
end caps or terminal.  
Soldering  
Iron  
Soldering  
Iron  
Pull  
3. Remove the solder from all the pads of the Flat-IC  
by using a de-solder braid.  
Soldering  
Iron  
2. Without pulling up, carefully twist the component  
with tweezers to break the adhesive.  
De-Solder  
Braid  
3. Do not reuse removed leadless or chip  
components since they are subject to stress  
fracture during removal.  
Flat IC  
Chip Component Installation  
1. Put a small amount of solder on the board  
soldering pads.  
2. Hold the chip component against the soldering  
pads with tweezers or with a miniature alligator clip  
and apply heat to the pad area with a 30 watt iron  
until solder flows. Do not apply heat for more than  
3 seconds.  
4. Position the new Flat-IC in place (apply the pins of  
the Flat-IC to the soldering pads where the pins  
need to be soldered). Properly determine the  
positions of the soldering pads and pins by  
correctly aligning the polarity symbol.  
Polarity Symbol  
Chip Components  
TYPE  
SOLDER  
CAPS  
GRADE  
5. Solder all pins to the soldering pads using a fine  
tipped soldering iron.  
c
b
e
TRANSISTOR  
CAPACITOR  
1ST DIGIT  
Soldering  
2ND DIGIT  
Solder  
Iron  
COMMON  
CATHODE  
MULTIPLIER  
=1600 = 1.6k  
6. Check with a magnifier for solder bridge between  
the pins or for dry joint between pins and soldering  
pads. To remove a solder bridge, use a de-solder  
braid as shown in the figure below.  
SOLDER  
CAPS  
ANODES  
MH DIODE  
RESISTOR  
De-Solder  
Braid  
Solder  
Bridge  
Soldering  
Iron  
- 4 -  
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Service Notes (Continued)  
IMPORTANT: To protect against possible damage to  
Preparation  
the solid state devices due to arcing or static  
discharge, make certain that all ground wires and CTR  
DAG wire are securely connected.  
1. Connect Receiver to AC 120 Volts. Do not turn ON.  
2. Connect HIGH VOLTAGE meter to 2nd anode  
(H.V. button). Note: Use cold ground(  
) for  
negative lead.  
3. Connect the ammeter serial from the flyback anode  
lead to the picture tube anode socket.  
4. Prepare HHS jig to be connected between TPD50  
and TPD51 as shown in Fig. 2.  
CAUTION: The power supply circuit is above earth  
ground and the chassis cannot be polarized. Use an  
isolation transformer when servicing the Receiver to  
avoid damage to the test equipment or to the chassis.  
Connect the test equipment to the proper ground  
() or  
(
) when servicing, or incorrect voltages will be  
Procedure:  
1. Open Connector A17.  
measured.  
2. Turn power ON and Apply a monoscope pattern.  
WARNING: This Receiver has been designed to meet  
or exceed applicable safety and X-ray radiation  
protection as specified by government agencies and  
independent testing laboratories.  
3. Set current within 50-100µΑ by changing the  
picture and bright controls.  
4. Turn power OFF.  
5. Connect HHS jig between TPD50 and TPD51 (VR  
To maintain original product safety design standards  
relative to X-ray radiation and shock and fire hazard,  
should be turn fully clockwise).  
6. Turn power on.  
parts indicated with the symbol  
on the schematic  
7. Turn slowly the variable resistor to increase the  
current until the horizontal sync frequency abruptly  
increases indicating that the horizontal frequency is  
just beginning to pull out of sync. Maintain the  
current within 50-100µΑ by changing the picture  
and bright controls  
must be replaced with identical parts. Order parts from  
the manufacturer’s parts center using the parts  
numbers shown in this service manual, or provide the  
chassis number and the part reference number.  
For optimum performance and reliability, all other parts  
should  
identical specification.  
be  
replaced  
with  
components  
of  
8. Observe the High Voltage meter. HIGH VOLTAGE  
should read less than 40.2kV.  
9. Turn power OFF, Remove HHS jig, HV meter,  
ammeter and connect A17 connector.  
Horizontal Oscillator Disable Circuit  
This chassis employs a special circuit to protect  
against excessive high voltage and beam current. If, for  
any reason, the high voltage and beam current exceed  
a predetermined level this protective circuit activates  
and detunes the horizontal oscillator that limits the high  
voltage. The over-voltage protection circuit is not  
adjustable. However, if components indicated by the  
10. Turn Power ON. Reset Picture and Brightness  
controls. Confirm B+ 140V±1.5V with 120V AC  
applied.  
11. IF HIGH VOLTAGE IS NOT WITHIN THE  
SPECIFIED LIMIT THE CAUSE MUST BE  
DETERMINED BEFORE THE RECEIVER IS  
RETURNED TO THE OWNER.  
symbol  
on the schematic in either the horizontal  
sweep system or the over-voltage protection circuit  
itself are changed, the operation of the circuit should  
be checked using the following procedure:  
Equipment needed to check the disabled circuit:  
1. DC Ammeter  
2. High Voltage Meter (0- 50kV electrostatic)  
3. Variac or Isolation Transformer  
4. HHS Jig (See Fig. 2)  
100Ω  
Figure 2. HHS Jig  
1KΩ  
TPD51  
TPD50  
- 5 -  
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Receiver Feature Table  
FEATURE\MODEL  
CT-32SX31E/UE/CE  
CT-36SX31E/UE/CE  
Chassis  
NA8ML  
Tunning system  
# of channels  
Menu language  
Closed Caption  
V-Chip (USA/CANADA)  
2RF  
96K  
181  
Eng/Span/Fr  
X
X
X
Remote Model #  
Picture tube  
EUR511500  
AMEC  
Comb Filter  
3 DIG  
VM  
X
V/A norm  
X
Color Temp  
X
MTS/SAP/DBX  
BASS/BL/TRE Control  
AI Sound  
X
X
X
Surround  
X
SPATIALIZER/BBE  
Built-in audio power  
# of speakers  
A/V in (rear/front)  
S-VHS Input (rear/front)  
BBE  
10W/CH (10%)  
2
3(2/1)  
1/1  
Component Input  
(Y,Pb,Pr)  
1
Audio Out  
(FAO: F, VAO: V)  
F,V  
EPJ/HPJ/MISC  
HPJ  
Dimensions  
(WxDxH)  
mm  
in  
667.3x810x568  
26.52x32.4x22.72  
747x936x610.5  
29.88x37.44x24.42  
Specifications  
Weight (kg/lbs)  
74.8/164.56  
98.5/216.7  
are subject to  
change without  
Power source (V/Hz)  
Anode voltage  
120/60  
notice  
or  
obligation.  
31.0kV ± 1.0kV  
Dimensions and  
weights  
approximate.  
are  
1V  
75, phono jack  
Video input jack  
p-p  
Audio input jack  
500mV RMS 47kΩ  
A-Board TNP2AH026  
G-Board TNPA1670  
L-Board TNPA1673  
D-Board TNP2AH027  
AB  
NIL  
NIL  
AC  
AB  
AB  
Table 1. Receiver Features  
- 6 -  
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Location of Controls (Receiver)  
Front A/V Jacks  
VOLUME  
CHANNEL  
ACTION TV/VIDEO  
POWER  
Controls Inside  
front door  
Remote Control  
Sensor  
2
3
4
5
1
Figure 3. Location of Controls (Receiver).  
Quick Reference Control Operation  
Quick Reference  
Control Operation  
1
2
Power Button - Press to turn ON or OFF.  
Volume Buttons - Press to adjust Sound Level, or to adjust Audio Menus, Video  
Menus, and select operating features when menus are displayed  
Channel Buttons - Press to select programmed channels. Press to highlight desired  
features when menus are displayed. Also use to select Cable Converter box channels  
after programming Remote Control Infra-red codes (the TV/AUX/CABLE switch must  
be set in CABLE position).  
3
Action Button - Press to display Main Menu and access On Screen feature and  
Adjustment Menus.  
4
5
TV/Video Button - Press to select TV or Video Input.  
- 7 -  
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Location of Controls (Remote)  
MULTI Button  
POWER Button  
Press to turn ON and OFF.  
MUTE Button  
Programmable button that can  
operate up to seven (7) functions at  
once  
Press to mute sound.  
A second press resumes sound.  
Press also to access and delete  
Closed Caption display.  
TV/VIDEO Button  
Press to select TV or Video input.  
CH (channel) Buttons  
VCR, DVD, LD/CD, AUX, TV, CBL,  
DBS, RCVR  
Press to select channels.  
Use with volume buttons to  
navigate in menus.  
Component function buttons  
DBS EXIT, DBS GUIDE  
DBS function buttons.  
RECALL Button  
VOL (volume) Buttons  
Press to adjust TV sound level.  
Use with Channel buttons to  
navigate in menus.  
Press to display Time, status  
of Sleep Timer, Channel,  
Video mode and Channel  
Caption (Station Identifier).  
R-TUNE (Rapid Tune) Button.  
Press to switch to the previous  
channel.  
OPEN/CLOSE, SLOW, STILL  
DVD function buttons.  
“0” - “9”  
ACTION Button  
Press to display Main Menu and  
access or exit On Screen features  
and Adjustment Menus.  
Press numeric keypad to select any  
channel.  
REW, PLAY, FF, TV/VCR, STOP,  
PAUSE, REC, VCR CHANNEL  
Component function buttons.  
EUR511500  
Figure 4. Location of Controls (Remote).  
- 8 -  
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Disassembly for Service  
To release screen GND cables from L-Board L11 & L12  
Back Cover  
connectors, insert a wire in both sides of connector and  
pull upwards the cable, then remove the wire  
(See Fig. 6)  
Remove all the screws marked with an arrow(  
from the back of the Receiver.  
)
Note: Screw configuration, type, and number  
of screws vary depending on the  
model of the Receiver serviced and  
the application; various models are  
covered in this Manual. Use same  
hardware when reassembling the  
receiver.  
Insert wire  
Pull cable upwards  
4 screws at the top edge of the Receiver.  
4 screw by the A/V jacks.  
1 screw by the antenna jacks.  
1 screw at each lower corner of the Receiver.  
1 screw by the retainer plate of the AC power cord.  
Figure 6. L-Board Screen GND cables release  
Speakers  
A-Board - Main Chassis  
Speaker is secured to the cabinet’s front with 4  
screws.  
The A-Board assembly rest on a chassis tray along  
with the D-Board. Slide chassis tray out. Gently lift tray  
and pull out. Disconnect plug connectors; release wire  
ties and holders as required for complete chassis  
removal.  
Keyboard Push Button Assembly  
Fastened to the inside of the cabinet front.  
Disassembly for CRT Replacement  
1. Discharge the CRT as instructed in the Safety  
Precautions (see page 2).  
2. Disconnect the yoke (DY) plug, degaussing coil  
(DEG) plug and the CRT 2nd anode button from  
the board.  
3. Remove the L-Board from the CRT socket and  
unplug the black wires (CRT dag ground) L11 &  
L12.  
1. A & D-Boards are secured to the chassis tray with  
five screws.  
2. The A-Board is mated to the D-Board by three  
flexible connectors: A1, A2 & A3 (G1, G2 & G3 on  
the G-Board, respectively). To remove either  
boards, unplug the connectors on the A-Board.  
Note: Some tie-wraps that secure the wire dressings  
may need to be unfastened for chassis  
removal.  
4. Lift the Main Chassis (A-Board) and all mounted  
boards completely out with the CRT Board attached.  
L-Board - CRT Output  
CRT Replacement  
Plugs into the socket on the CRT neck.  
1. Perform Disassembly for CRT Replacement  
procedure.  
2. Insure that the CRT H.V. Anode button is  
discharged before handling the CRT. Read the  
Safety Precautions (see page 2) on handling the  
picture tube.  
To remove this board, first unplug the board from  
the CRT neck, then disconnect L1, L2 & L3  
connectors, to disconnect the focus F1(Red Cable)  
& F2(White Cable) cables, pull the tab and release  
the cables, finally disconnect the screen cable from  
the D-Board Fly-Back.  
3. Remove the components from the CRT neck and  
place the cabinet face down on a soft pad.  
4. Note the original order for the CRT mounting  
hardware as they are remove from the CRT  
mounting brackets at each corner of the CRT.  
5. Remove the CRT with the degaussing coil and the  
dag ground braid attached.  
To reinsert back the cables, remember the original  
position of cables, F1(red cable) goes to A on the  
CRT socket and F2(white cable) goes to B on the  
CRT socket.  
Press tab  
leftward to  
Pull cables  
release cables  
upwards  
Note: After servicing the receiver, remember  
to dress the cables, as shown above.  
Figure 5. F1 & F2 cables release  
- 9 -  
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Disassembly for Service (Continued)  
Note: To remove the four brackets holding  
the degauss coil from the corners of  
the CRT, first remove the CRT from  
the cabinet, then remove the Brackets  
by pressing the tab on the bracket and  
pull upwards. These Brackets are  
included in the Degauss Coil Kit, for  
part number, please see parts list  
section (See Fig. 7).  
Note: Reuse all the clampers and mounting  
brackets from the degaussing coil and  
screen, and when remounting the  
degaussing coil assure that is not  
touching the speakers, this can be  
done  
by  
placing  
some  
tape  
(See Fig. 7), this may cause mask  
vibration. The mounting brackets and  
clampers are not supplied with the  
replacements.  
Degaussing  
Coil  
Bracket  
Important Notice:  
When ordering the CRT, please order CRT  
and CRT KIT also. Please see parts list  
section for part numbers  
Degaussing  
Coil  
Press tab  
Then Pull  
Upwards  
Figure 7. Brackets removal  
6. Note the original locations and mounting of the  
degaussing coil and the dag ground assembly to  
insure proper reinstallation on the replacement  
CRT.  
To remove and remount the degaussing coil:  
The degaussing coil is held in place by clampers  
fastened to the CRT corner ears. These clampers  
must be installed onto the replacement CRT prior  
to mounting the degaussing coil.  
To remove and remount the dag ground braid:  
a.Unhook the coil spring from the bottom corners  
of the CRT ears.  
b.Release the braid loop from the upper corners of  
the CRT ears.  
7. Mount the dag ground braid on the replacement  
CRT. Position the degaussing coil with new ties.  
Dress coil as was on the original CRT.  
8. Replace the components on CRT neck and  
reinstall into cabinet. Verify that all ground wires  
and circuit board plugs get connected.  
- 10 -  
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Back Cover Removal  
4 screws at top edge  
1 screw by  
antenna jacks  
1 screw  
1 screw  
1 screw at lower  
right corner  
1 screw  
1 screw  
1 screw at lower  
left corner  
Figure 8. Back Cover Removal  
- 11 -  
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Chassis Service Adjustment Procedures  
All service adjustments are factory preset and should not require adjustment unless controls and/or  
associated components are replaced.  
Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol  
( ) is used. Otherwise, use COLD ground ( ) — Tuner shield.  
L826  
C840  
Q804  
A-BOARD  
IC001  
D-BOARD  
Q002  
IC002  
L824  
+
-
IC881  
IC882 IC883  
L008  
T801  
IC101  
Q801  
IC2301  
IC1801  
T
T
U
N
E
R
U
N
E
R
C3023  
IC3001  
-
Q551  
A/V REAR INPUTS  
TP  
8
1
MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (TP8 to COLD GND)  
140.0V B+ Voltage Confirmation  
LOCATION (D-Board)  
VOLTAGE  
1. Set the Bright and the Picture to Minimum by  
using the Picture Menu.  
TPD7  
(by D511) 220V 220.0V ± 9.0V  
2. Connect the DVM between TPP17 (+ side) and cold  
LOCATION (A-Board)  
VOLTAGE  
(by IC883) MAIN 12V 12.0V ± 0.5V  
(by IC3001) MAIN 9V 9.0V ± 0.5V  
(by L008) MAIN 5V 5.0V ± 0.3V  
ground ( ).  
3. Confirm that B+ voltage is 140.0V ± 1.5V. This  
voltage supplies B+ to the Horizontal Output &  
Flyback circuits.  
TPA6  
TPA7  
TPA8  
TPA16  
TPA18  
Source Voltage Chart  
120V AC line input. Set the Bright and the Picture to  
Minimum by using the Picture Menu. Use cold ground  
(by Q002) STBY 3.3V  
(by C3023) BTL 30V  
3.3V ± 0.2V  
32.0V ± 2.0V  
(
.
) for the (-) lead of the DVM.  
Adjust Picture Menu for normalized video adjustments.  
LOCATION (D-Board)  
VOLTAGE  
TPP17  
TPP25  
TPP19  
TPP20  
TPP21  
TPP22  
(by D825) +B2 140.0V ± 1.5V  
High Voltage Check  
1. Select an active TV channel and confirm that  
horizontal is in sync.  
2. Adjust Brightness and Picture using Picture Icon  
menu so video just disappears.  
3. Confirm B+ 140.0V is within limit.  
4. Using a high voltage meter confirm that the High  
Voltage is 31.0kV ± 1.0kV.  
(by D827) 9V  
(by Q804) 15V  
9.0V ± 1.5V  
15.0V ± 2.0V  
15.0V ± 1.5V  
-15.0V ± 1.5V  
32.5V ± 2.0V  
(by C840) 15V (VER.)  
(by L826) -15V (VER.)  
(by L824) SOUND  
- 12 -  
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Purity and Convergence Procedure  
Adjustment is necessary only if the CRT or the  
Vertical Raster Shift Adjustment (Only for  
Models with Purity/Convergence Assembly with 4  
Pairs of Rings).  
deflection yoke is replaced or if the setting was  
disturbed. The complete procedure consists of:  
1. Vertical Raster Shift Adjustment. (Only for Models  
with Purity/Convergence Assembly with 4 Pairs  
of Rings).  
2. Initial static convergence.  
3. Setting the purity.  
4. Final static convergence.  
When the CRT or theYoke is Replaced  
Place the yoke on the CRT neck (do not tighten  
the clamp).  
Place the vertical raster shift tabs at 3 o’clock (90o from  
the purity and convergence tabs)  
Apply a green pattern with a horizontal line, adjust the  
Deflection Yoke so that has no tilt, then secure it.  
Adjust center line of the pattern with the mechanical  
center of the CRT, this center is determined by two  
marks at the side edges of the screen. To adjust the  
line, once the vertical raster shift tabs are place at 3  
o’clock to reduce its magnetic field effect (see Fig. 9  
and Fig. 10) open the tabs the same angle from the  
center, until the center line of the pattern becomes a  
straight line, centered with the marks of the CRT. (see  
Fig. 11)  
R&B Convergence Rings  
R&B&G Convergence Rings  
Purity Rings Centered  
Over G3/G4 Gap  
Center line  
from pattern  
Open the  
same angle  
from center  
G3  
G4  
Mechanical  
Center Marks  
Vertical Raster Shift tabs  
Vertical Raster Shift Ring  
Figure 9. Positioning of Purity/Convergence  
Figure11. VerticalRaster Shift Adjustment  
Assembly (4 Pairs of Rings)  
(4 pairs of rings assembly)  
R&B&G Convergence Rings  
90o  
R&B Convergence Rings  
Vertical Raster  
Shift Rings  
Purity Rings  
Figure 10. Positioning of Purity/Convergence  
Assembly (4 Pairs of Rings)  
Turn the Receiver ON. Operate the Receiver for 60  
minutes using the first Purity Check field (white screen)  
to stabilize the CRT.  
Fully degauss the Receiver by using an external  
degaussing coil.  
Slide the deflection yoke back and forth on the neck of  
the CRT until it produces a near white, uniform raster.  
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Initial Center Static Convergence  
Connect a dot/cross hatch generator to the Receiver  
and tune in a signal. Observe misconvergence at  
center of the screen only.  
Adjust the R&B pole magnets; by separating tabs and  
rotating to converge blue with red.  
Adjust the R&B and R&B&G pole magnets: by  
separating tabs and rotating to converge blue and red  
(magenta) with green.  
Final Convergence Procedure (see Fig. 17  
through Fig. 19):  
Note: Vertical size and focus adjustments must be  
completed prior to performing the convergence  
adjustment. Connect a dot pattern generator to the  
Receiver. The Brightness level should not be higher  
than necessary to obtain a clear pattern.  
Converge the red and the blue dots at the center of the  
screen by rotating the R&B pole Static Convergence  
Magnets.  
Align The converged red/blue dots with the green dots  
at the center of the screen by rotating the R&B&G pole  
Static Convergence Magnets. Melt wax with soldering  
iron to reseal the magnets.  
Slightly tilt vertically and horizontally (do not rotate) the  
deflection yoke to obtain a good overall convergence.  
If convergence is not reached at the edges, insert  
permalloy (see following section) from the DY corners  
to achieve proper convergence. Recheck for purity and  
readjust if necessary.  
After vertical adjustment of the yoke, insert wedge at 11  
o’clock position, then make the horizontal  
tilt adjustment.  
Secure the deflection yoke by inserting two side  
wedges at 3 and 7 o’clock positions.  
Apply adhesive between tab (thin portion) of wedge  
and CRT and place tape over the tab to secure to  
the CRT.  
Note: Precise convergence at this point is  
not important.  
Purity Adjustment  
When the Receiver is in the Serviceman Mode for  
making electronic adjustments, press the Recall button  
on the Remote Control to enter Purity Check. (See the  
Service  
Adjustments  
Electronic  
Controls  
procedure).  
Operate the Receiver for 60 minutes using the first  
Purity Check field (white screen) to stabilize the CRT.  
Fully degauss the Receiver by using an external  
degaussing coil.  
Press the Recall button on the Remote Control again  
until the Purity Check (green screen) appears.  
Loosen the deflection yoke clamp screw and move the  
deflection yoke back as close to the purity magnet  
as possible.  
Adjust the Purity rings to set the vertical green raster  
precisely at the center of the screen (see Fig .12).  
Dynamic Corvergence Adjustment  
Use this for a precisely overall convergence adjust at  
the edges.  
NOTES:  
DY(YHC, YV, XV) Adjustment  
1. CRT warm up with white screen  
(three guns activated) is needed  
to stabilize the shadow mask  
expansion.  
2. Initial center static convergence  
(roughly centers three gun  
beams) is required in order to  
perform purity adjustment.  
YV Adjustment (VR1 for Horizontal dynamic  
convergence)  
1. Apply a crosshatch pattern.  
2. Adjust contrast and brightness customer controls  
to obtain a correct picture.  
3. With a driver adjust VR1 (located in deflection yoke  
board Fig. 19) to obtain a proper corvergence at  
top and bottom of the screen (See Fi g.13)  
Green Raster  
Figure 12. Green Raster Adjustment  
Slowly move the deflection yoke forward until the best  
overall green screen is displayed.  
Tighten the deflection yoke clamp screw.  
B&R  
Press the Recall button on the Remote Control again  
until the purity check blue and red screens appear and  
observe that good purity is obtained on each respective  
field.  
G
B&R  
G
Press the Recall button on the Remote Control again  
until Purity check (white screen) appears. Observe the  
screen for uniform white. If purity has not been  
achieved, repeat the above procedure.  
B&R  
G
B&R  
G
Figure 13. VR1 Adjustment (YV)  
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YH Adjustment (VR2 for Vertical dynamic  
convergence)  
1. Apply a crosshatch pattern.  
Permalloy Convergence Corrector Strip  
(Part No. 0FMK014ZZ)  
2. Adjust contrast and brightness customer controls  
to obtain a correct picture.  
3. With a driver Adjust VR2 (located in deflection yoke  
board Fig. 19) to obtain a proper corvergence at  
left and right side of the screen. (See Fig. 14)  
This strip is used in some sets to match the yoke and  
CRT for optimum convergence. If the yoke or CRT is  
replaced, the strip may not be required.  
First converge the set without the strip and observe  
the corners.  
If correction is needed:  
1. Place strip between CRT and yoke, in quadrant  
needing correction. Slowly move it around for  
desired results.  
2. Press adhesive tightly to the CRT and secure  
with tape.  
DAF Adjustment  
Preparation:  
1. Apply a crosshatch pattern.  
2. Set user controls, bright to center and picture to  
max.  
B&R  
B&R G  
B&R  
B&R G  
G
G
Figure 14. VR2 Adjustment (YH)  
3. Connect a frequency counter to TPD10.  
Procedure:  
XV Adjustment(precise adjustment)  
1. Apply a crosshatch pattern.  
2. Adjust contrast and brightness customer controls  
to obtain a correct picture.  
3. With a driver adjust the coil located in deflection  
yoke board to obtain a proper convergence  
horizontally.  
1. Connect channel one of the oscilloscope with 10x1  
probe to TPP33.  
2. Connect channel two of the oscilloscope with 10x1  
probe to CRT HEATER (L-Board).  
3. Adjust R1581 so that frequency counter reads  
15.7kHz±100Hz.  
B&R  
TPP33  
G
B&R  
G
HEATER  
PIN  
B&R  
G
B&R  
G
Figure 16. DAF Adjustment  
Figure 15. XV Adjustment  
4. Adjust R1577 so that signal on TPP33 is on phase  
with CRT HEATER (L-Board) pin. (see Fig. 16)  
Note: Apply a red pattern and confirm purity, if purity  
is poor, repeat purity adjustments.  
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As the yoke is tilted  
vertically, the rasters  
G
R
B
produced  
by  
the  
outside guns rotate in  
opposite directions.  
Figure 17. Vertical Yoke Movement  
Raster produced from one of the  
outside electron beams  
Raster from the other side electron  
beam  
R G B  
Static convergence magnets are set for  
center convergence  
As the yoke is tilted horizontally, one  
raster gets larger while the other gets  
smaller  
Figure 18. Horizontal Yoke Movement  
For Adjustment  
of DY (YHC/YV/XV)  
Dynamic Convergence  
2 Poles(Purity)  
2 Poles(VRS Adj)  
4 Poles  
6 Poles  
Figure 19. Convergence Magnets and Wedges Location  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
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Serviceman Mode (Electronic Controls)  
This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and it  
replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control  
functions are now performed by using “On Screen Display Menu”. (The Serviceman Adjustment Mode.)  
Note: It is suggested that the technician reads all the way through and understand the following procedure for  
Entering/Exiting the Serviceman Adjustment Mode; then proceed with the instructions working with the  
Receiver. When becoming familiar with the procedure, the Flow Chart for Serviceman Mode may be used  
as a quick guide.  
Quick Entry to Serviceman Mode:  
At times when minor adjustments need to be done to the electronic controls, the method of Entering the  
serviceman Mode without removal of the cabinet back is as follows using the Remote Control:  
1. Select SET-UP icon and select CABLE mode.  
2. Select TIMER icon and set SLEEP time for 30 Min.  
3. Press ACTION button 3 times to exit menus.  
4. Tune to the Channel 124.  
5. Adjust VOLUME to minimum (0).  
6. Press the VOL  
button (decrease) on Receiver. Red “CHK” appears in upper corner.  
To toggle between Aging and Serviceman modes:  
While the “CHK” is displayed on the left top corner of the CRT, pressing the Action and the Volume Up buttons  
on the Receiver simultaneously will toggle between the modes. Red “CHK” for Serviceman and yellow “CHK” for  
Aging.  
7. Press the Power Button on the Remote Control to select one of the Serviceman Adjustment Modes.  
1) B= Serviceman VCJ SUB-DATA ADJUSTEMENT.  
2) C= Serviceman VCJ CUT-OFF ADJUSTMENT.  
3) D= Serviceman GEOMETRY ADJUSTMENT.  
4) M= Serviceman MTS ADJUSTMENTS.  
5) P= Serviceman PIP ADJUSTMENT.  
6) S= Serviceman S OPTION ADJUSTMENTS.  
7) X = Serviceman X OPTION ADJUSTMENT.  
8) E = Serviceman E OPTION ADJUSTMENTS  
9) “CHK” = Normal operation of CHANNEL  
and VOLUME  
.
a
b
a
b
32  
B
0
2
215  
C
0
Note: Only the applicable settings for  
the Receiver serviced will be  
available (See a in Fig. 20).  
An address Menu appears in the right  
hand corner of the screen  
Figure 20. Serviceman Mode Menu Adjustments.  
Exiting the Serviceman Mode:  
Press the Action and the Power buttons on the Receiver simultaneously for at least 2 seconds.  
THE RECEIVER EXITS SERVICEMAN MODE.  
The Receiver momentarily shuts off; then comes back on tuned to channel 3 with a preset level of sound.  
Any programmed channels, channels caption data and some others user defined settings will be erased.  
IMPORTANT NOTE:  
Always Exit the Serviceman Mode  
Following Adjustments.  
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Press the Power Button on the Remote Control to select the Serviceman Adjustment .  
For Adjustments:  
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the  
Remote Control to select one of  
the available Service Adjustments  
(a in Fig. 20).  
value set (b in Fig. 20) for  
each address before  
modifying anything. It is  
easy to erroneously adjust  
the wrong item.  
Remote Control to adjust the  
level of the selected Service  
Adjustment (b in Fig. 20).  
Default  
Level  
Sub-Data Adjustment  
B00  
SUB-COLOR  
SUB-TINT  
31  
CH  
CH  
B01  
B02  
B03  
B04  
B05  
B06  
B07  
B08  
B09  
B0A  
40  
SUB-BRIGHTNESS  
SUB-CONTRAST  
40  
16  
SUB-TINT VIDEO  
16  
SUB-COLOR VIDEO  
SUB-TINT COMP  
22  
CH  
63  
SUB-COLOR COMP  
SUB SHARP TV/VIDEO  
SUB SHARP S-VHS/COMP  
SUB-CONTRAST FIXED  
28  
10  
17  
15  
PW  
Default  
Level  
Cut-Off Adjustment  
C00  
C01  
C02  
C03  
C04  
C05  
C06  
C07  
C08  
C09  
C0A  
CUT-OFF R  
CUT-OFF G  
128  
128  
128  
31  
CH  
CH  
CUT-OFF B  
BRIGHTNESS  
G DRIVE  
CH  
64  
B DRIVE  
64  
DRIVE C TEMP  
CONT C TEMP  
CUTOFF R COMP  
CUTOFF G COMP  
CUTOFF B COMP  
8
5
112  
114  
103  
PW  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
To D Items.  
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Press the Power Button on the Remote Control to select the Serviceman Adjustment  
For Adjustments:  
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the  
Remote Control to select one of  
the available Service Adjustments  
(a in Fig. 20).  
value set (b in Fig. 20) for  
each address before  
modifying anything. It is  
easy to erroneously adjust  
the wrong item.  
Remote Control to adjust the  
level of the selected Service  
Adjustment (b in Fig. 20).  
Default  
Geometry Adjustments  
Level  
13  
37  
5
D00  
H POSITION  
V SIZE  
CH  
CH  
D01  
D02  
D03  
D04  
D05  
D06  
D07  
D08  
D09  
D0A  
D0B  
D0C  
D0D  
D0E  
V S CORRECTION  
V LIN CORRECTION  
E/W TRAPEZIUM  
V AGC  
8
9
1
CH  
V POSITION  
1
V CENTERING  
V CENTERING DAC SW  
V-BLK START  
V-BLK STOP  
65  
0
12  
14  
6
EW CORNER  
EW PARABOLA  
H WIDTH  
11  
20  
90  
OSD POSITION  
PW  
Default  
Level  
MTS Adjustment  
M00  
M01  
INPUT LEVEL  
33  
6
CH  
LOW-LEVEL SEPARATION  
M02 HIGH-LEVEL SEPARATION  
25  
PW  
To P Items.  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
Note: Some adjustment modes may not be  
available in some formats.  
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Press the Power Button on the Remote Control to select the Serviceman Adjustment  
For Adjustments:  
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the  
Remote Control to select one of  
the available Service Adjustments  
(a in Fig. 20).  
value set (b in Fig. 20) for  
each address before  
modifying anything. It is  
easy to erroneously adjust  
the wrong item.  
Remote Control to adjust the  
level of the selected Service  
Adjustment (b in Fig. 20).  
Default  
Level  
PIP Adjustment  
P00  
PIP COLOR  
PIP TINT  
53  
CH  
P01  
P02  
P03  
P04  
P05  
P06  
P07  
P08  
P09  
P0A  
P0B  
P0C  
P0D  
64  
PIP BRIGHTNESS  
PIP CONTRAST  
PIP POS V_TOP  
PIP POS V_BOTTOM  
PIP POS H_LEFT  
PIP POS H_RIGHT  
PIP POS  
11  
58  
26  
143  
10  
CH  
101  
26  
CH  
PIP POS  
160  
10  
PIP POS  
PIP POS  
116  
N/A  
4
N/A  
PIP YDELAY  
PW  
To S Items.  
Note: Some adjustment modes may not be  
available in some formats.  
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Press the Power Button on the Remote Control to select the Serviceman Adjustment  
For  
Adjustments:  
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the  
Remote Control to select one of  
the available Service Adjustments  
(a in Fig. 20).  
value set (b in Fig. 20) for  
each address before  
modifying anything. It is  
easy to erroneously adjust  
the wrong item.  
Remote Control to adjust the  
level of the selected Service  
Adjustment (b in Fig. 20).  
Default  
Level  
OPTIONS Adjustment  
S00  
ABL GAIN  
ABL POINT  
3
3
CH  
S01  
S02  
S03  
S04  
S05  
S06  
S07  
S08  
S09  
S0A  
S0B  
RGB BRIGHTNESS  
RGB GAMMA  
GAMMA  
3
1
1
VSM-G  
0
BS POINT  
3
CH  
CLOCK ADJUST  
CAP DIGITAL FIL  
CAP SCROLL  
RGB MATRIX  
RGB MATRIX YUV  
128  
0
CH  
1
6
5
PW  
To X Items.  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
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Press the Power Button on the Remote Control to select the Serviceman Adjustment  
For Adjustments:  
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the  
Remote Control to select one of  
the available Service Adjustments  
(a in Fig. 20).  
value set (b in Fig. 20) for  
each address before  
modifying anything. It is  
easy to erroneously adjust  
the wrong item.  
Remote Control to adjust the  
level of the selected Service  
Adjustment (b in Fig. 20).  
Default  
Level  
X Option Adjustment  
X00  
V ENHANCER  
V ENH NL  
3
CH  
CH  
X01  
X02  
X03  
X04  
X05  
X06  
X07  
X08  
X09  
X0A  
X0B  
X0C  
X0D  
X0E  
1
H PEAKING GAIN  
V CORING  
2
1
C TRAP GAIN  
GEO MAG CEN  
GEO MAG GAIN  
H LOCK  
0
179  
10  
1
CH  
H LOCK L  
70  
313  
266  
0
H SEPA 1L  
H SEPA 2L  
H LOCK W  
H LOCK L  
70  
313  
266  
H SEPA 1WL  
H SEPA 2WL  
Default  
Level  
PW  
E Option Adjustment  
E00  
E01  
E02  
SURROUND EFFECT  
BBE LOW  
3
4
6
CH  
BBE HIGH  
PW  
To B Items.  
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To Check Purity:  
Press the Recall Button on the Remote Control when in Serviceman Mode (red “CHK” is displayed) to enter the  
Purity Field Check Mode.  
NORMAL  
SCREEN  
Press Recall again to select desired field.  
BLUE  
SCREEN  
GREEN  
SCREEN  
RED  
SCREEN  
WHITE  
SCREEN  
Figure 21. Purity Check Field Mode.  
Helpful Hints  
Entering Serviceman Mode (Back-Open Method)  
1. While the Receiver is ON or Puggled and operating in Normal Mode,  
momentarily short test point FA1 (TP8) to Cold Ground (  
) FA2  
(TP3) A-Board.  
The Receiver enters the Aging Mode.  
Yellow letters “CHK” appear in the upper left corner of the CRT.  
(The Volume Up/Down will adjust rapidly).  
2. Simultaneously press the Action and the Volume Up buttons on the  
Receiver Control Panel.  
The Receiver enters the Serviceman Mode.  
The letter in “CHK” turn red.  
(The Volume Up/Down will adjust normally).  
(All customer controls are set to nominal level).  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
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Instructional Flow Chart for Serviceman Mode  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
NORMAL MODE  
Momentarily shortFA1 toFA2  
.
AGING MODE  
Yellow “CHK” appears in upper left corner of screen.  
Volume Up/Down operate rapidly.  
WHITE  
SCREEN  
Customer Controls are set to nominal level.  
RECALL  
QUICK ENTRY TO SERVICEMAN MODE  
(ON REMOTE)  
Select CABLE Mode.  
Adj.  
Set SLEEP time for 30 Min.  
Tune to Channel 124.  
Adjust Volume to minimum.  
Press VOL DOWN On Receiver.  
N
EXIT  
needed?  
Y
Press Action + Volume Up Simultaneously (ON Receiver)  
SERVICEMAN MODE  
BLUE  
SCREEN  
GREEN  
SCREEN  
“CHK” turns red.  
Volume Up/Down operate normally.  
Customer Controls are set to nominal level.  
C
RED  
SCREEN  
WHITE  
SCREEN  
RECALL  
(ON REMOTE)  
Adj.  
needed?  
N
EXIT  
Press Action and Power on the Receiver  
simultaneously for at least 2 seconds.  
Y
POWER  
(ON REMOTE)  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
SUB-DATA ADJUSTMENTS.  
B ITEMS.  
ON REMOTE TO ADJUST  
VOL  
VOL  
THE LEVEL  
POWER  
(ON REMOTE)  
A
Figure 22. Flow Chart for Serviceman Mode.  
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Instructional Flow Chart for Serviceman Mode - Continued  
A
CUT-OFF ADJUSTMENTS.  
C ITEMS.  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
Y
Adj.  
needed?  
ON REMOTE TO ADJUST  
VOL  
VOL  
THE LEVEL  
N
POWER  
(ON REMOTE)  
PINCUSHION ADJUSTMENTS.  
D ITEMS.  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
Y
Adj.  
needed?  
IMPORTANT NOTE:  
Always Exit the Serviceman  
Mode Following Adjustments.  
ON REMOTE TO ADJUST  
THE LEVEL  
VOL  
VOL  
N
POWER  
(ON REMOTE)  
MTS ADJUSTMENTS.  
M ITEMS.  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
Adj.  
needed?  
Y
ON REMOTE TO ADJUST  
VOL  
VOL  
THE LEVEL  
N
POWER  
(ON REMOTE)  
B
Figure 23. Flow Chart for Serviceman Mode (cont).  
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Instructional Flow Chart for Serviceman Mode - Continued  
B
PIP ADJUSTMENTS.  
P ITEMS.  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
Adj.  
needed?  
Y
ON REMOTE TO ADJUST  
VOL  
VOL  
THE LEVEL  
N
POWER  
(ON REMOTE)  
OPTIONS ADJUSTMENTS.  
S ITEMS.  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
Y
Adj.  
needed?  
ON REMOTE TO ADJUST  
VOL  
VOL  
THE LEVEL  
N
POWER  
(ON REMOTE)  
COMB-FILTER ADJUSTMENTS.  
X ITEMS.  
ON REMOTE CONTROL TO  
SELECT ADJUSTMENT  
CH  
Adj.  
needed?  
Y
N
POWER  
ON REMOTE TO ADJUST  
(ON REMOTE)  
VOL  
VOL  
THE LEVEL  
N
C
EXIT  
Press Action and Power on the Receiver  
simultaneously for at least 2 seconds.  
Figure 24. Flow Chart for Serviceman Mode (cont).  
Note: Some adjustments modes may not be  
available in some models depending  
on available options.  
IMPORTANT NOTE:  
Always Exit the Serviceman Mode  
Following Adjustments.  
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Service Adjustments (Electronic Controls)  
Sub-Contrast Adjustment  
Serviceman DAC Adjustment (B02, B03)  
This adjustment is factory set. Do not adjust unless  
repairs are made to associated circuit, the CRT Board  
or when the CRT is replaced.  
Preparation:  
3 IRE  
1. Apply a Black-White pattern.  
2. Set the picture settings to normal and color to  
minimum.  
7.5 IRE  
3. RGB GAMMA (S03) DAC from 1 to 0  
4. Connect the oscilloscope to TP47R.  
Figure 26. Pattern  
5. Connect a jumper from TPD2 to cold ground ( ).  
Procedure:  
Tint/Color Adjustment  
1. In the Serviceman Mode, select DAC B2 for Sub-  
Brightness to obtain 2.6±0.1V between 7.5IRE and  
GND level at TP47R (See Fig. 25)  
2. In the Serviceman Mode, select DAC B03 for Sub-  
Contrast to obtain 1.5±0.1V between 7.5IRE and  
100IRE level at TP47G  
3. Remove short jumper and set RGB GAMMA (S03)  
DAC to 1.  
4. Set the picture settings to normal.  
.
Serviceman DAC Adjustment (B01) (B00)  
Preparation:  
1. Apply a rainbow color bar signal.  
2. Preset the following controls:  
• Brightness . . . . . . . Min.  
• Color . . . . . . . . . . . . Center.  
• Tint . . . . . . . . . . . . . Center.  
• Picture . . . . . . . . . . . Max.  
• Sharpness. . . . . . . . Min.  
3. Set RGB GAMMA (S03) DAC to 0  
4. Connect the oscilloscope to TP47B (A-Board).  
100IRE  
5. Connect a jumper from TPD2 to GND ( ).  
Procedure:  
1.5  
±
0.1V  
1. In the Serviceman Mode for making electronic  
adjustments, select (B01) DAC Sub-Tint  
Adjustment. Adjust until the waveform measured is  
as the one shown in Fig. 27.  
7.5IRE  
2.6  
±
v
0.1V  
GND  
Figure 25. waveform  
A
B
TP47B (A-Board)  
C
Sub-Brightness (B02)  
1 2 3  
10  
4 5 6 7 8 9  
Adjustment of this control is important for setting proper  
operation of customer brightness and picture controls.  
Do not adjust the SCREEN VR after the Sub-  
Brightness is set.  
A to B = 1 unit  
to C = 2 units  
A
Figure 27. TP47B waveform  
Preparation:  
1. Normalize picture settings.  
2. Switch COLOR TEMPERATURE to NORMAL.  
2. Connect the oscilloscope to TP47G or TP35 (L-  
Board) and cold GND.  
3. Select DAC Sub-Color Adjustment (B00) and  
adjust for peak to peak amplitude to be  
0.50Vp-p ±0.05V as shown in Fig .28.  
Procedure:  
1. Apply a black white cross pattern.  
2. In the Serviceman Mode for making electronic  
adjustments, select the DAC adjustment (B02) and  
adjust data so that 7.5IRE part is the same light  
output as the 3IRE part (See Fig. 26).  
TP47G (A-Board)  
1 2 3 4 5 6  
0.50Vp-p±0.05V  
7 8 9 10  
Figure 28. TP47G waveform  
4. Remove short jumper and set RGB GAMMA (S03)  
DAC to 1.  
PIP Sub-Contrast Adjustment (P03)  
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Procedure:  
1. Connect the oscilloscope to TPY1.  
4. Observe the oscilloscope waveform at Horizontal  
rate and adjust the Serviceman Mode Sub-Bright  
DAC (B02) level until a scanning period of  
2.3±0.05V above DC ground is measured, as  
indicated in Fig. 30.  
2. Apply a color bar signal in main and PIP (PIP on).  
3. In the Serviceman Mode for making electronic  
adjustments, select the DAC adjustment (P03) for  
PIP Sub-Subcontrast so that child (PIP) level is  
90% of parent (MAIN) signal (See Fig. 29)  
2.3±0.05V DC  
0V DC  
Figure 30. TP35 Waveform  
A
Ax0.9  
5. Press the R-Tune key on the remote.  
6. Connect the scope to RED Cathode (KR) on the  
CRT-Board.  
7. In the Serviceman Mode for making electronic  
adjustments, select the RED CUTOFF DAC (C00).  
Figure 29. Waveform  
8. Press the R-Tune key on the remote.  
Color Temperature Adjustment  
(B/W Tracking)  
9. View scope trace at Horizontal rate and adjust the  
Serviceman Mode DAC (C00) level until a  
scanning period of 170±2V above DC ground is  
measured, as indicated in Fig. 31.  
Serviceman DAC Adjust.  
(C00) (C01) (C02) (C04) (C05)  
Minor Touch-Up Method  
10. Press the R-Tune key on the remote.  
11. Write the same C00 data to C01 and C02.  
12. Press the R-Tune key on the remote.  
OBSERVE low and high brightness areas of a B/W  
picture for proper tracking. Adjust only as required for  
“good gray scale and warm highlights”.  
1. LOW LIGHT areas – In Serviceman Mode for  
making electronic adjustments, select Cutoff (C00)  
RED, (C01) GRN, (C02) BLU and adjust the  
picture for gray.  
2. HIGH LIGHT areas – In Serviceman Mode for  
making electronic adjustments, select Drive (C04)  
GRN, (C05) BLU and adjust the picture for warm  
whites.  
13. Turn the Screen Control (part of FBT) slowly  
clockwise until a slightly color horizontal line  
appears.  
14. Adjust DAC C01 and C02 until the horizontal line  
becomes white.  
15. Press the R-Tune key on the Remote  
170±2V DC  
0V DC (Ground)  
Complete Adjustment  
Figure 31. KR Waveform  
Preparation:  
1. Turn the Receiver “ON” and allow 10 minutes  
warm up at high brightness.  
2. Apply a color bar signal with color “OFF”.  
3. Turn the SCREEN control (part of FBT T551) fully  
counterclockwise.  
16. In the Serviceman Mode for making electronic  
adjustments select the DAC DRIVE adjustments  
(C04) GRN, (C05) BLUE and adjust for warm white  
in a white color bar pattern.  
Procedure:  
17. Apply a monoscope pattern and check for a good  
picture.  
Preset the following Serviceman DACs for best results:  
• C0. . . . . . . . . . . . . . 128  
18. EXIT the Serviceman Mode.  
• C1. . . . . . . . . . . . . . 128  
• C2. . . . . . . . . . . . . . 128  
• C4. . . . . . . . . . . . . . . 64  
• C5. . . . . . . . . . . . . . . 64  
1. Connect the oscilloscope to TP37 (L-Board).  
2. In Serviceman Mode for making electronic  
adjustment, select the Sub-Bright DAC (B02).  
3. Press the R-Tune key on the remote.  
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Service Adjustments (Electronic Controls, cont.)  
Horizontal Centering (D00)  
This Adjustment helps to center the picture horizontally  
Preparation:  
H-Size Adjustment (D0D)  
Preparation:  
1. Apply a Monoscope pattern  
Procedure:  
Connect a monoscope pattern signal.  
Procedure:  
1. Adjust “D0D” DATA so that width “A” and “B”  
becomes 5.00±0.40 (when using factory pattern)  
1. In the Serviceman Mode for making electronic  
adjustments. Select the Horizontal Centering  
Adjustment DAC (D00) and adjust until the center  
of the monoscope pattern is centered on CRT.  
2. EXIT the Serviceman Adjustment Mode.  
E-W PCC Adjustment (D0C)  
(See Fig. 34).  
4
4
This adjustmet helps to correct left and right sides of  
picture.  
B
A
Preparation:  
1. Apply a Crosshatch pattern  
2. Normalize the Picture Icon Video adjustments.  
Procedure:  
4
4
5
1
2
6
4
3
1. Adjust “D0C” DATA so that the 1st line and 3rd line  
5.00  
make a good balance (See Fig. 32).  
Figure 34. H-Size Adjustment  
Note: When using a different pattern, correlate with  
factory pattern.  
Min. Adjustment  
Max. Adjustment  
Correct Adjustment  
V-Size and V-Position Adjustment  
(D01 & D06)  
Figure 32. E-W PCC Adjustment  
Corner PCC Adjustment (D0B)  
Preparation:  
Preparation:  
1. Apply a Crosshatch pattern.  
1. Apply a Crosshatch pattern  
2. Normalize the Picture Icon Video adjustments.  
Procedure:  
1. To adjust upper and lower linearity.  
2. Adjust “D0B” to straighten upper and lower lines  
(See Fig. 33)  
Procedure:  
1. Apply a monoscope pattern.  
2. Enter Serviceman Mode  
3. Adjust (D06) to center the picture to the marks on  
the CRT.  
4. Adjust (D01) to make circle of monoscope pattern  
a round circle.  
V-Linearity Adjustment (D03)  
Preparation:  
1. Apply a Crosshatch pattern  
Min. Adjustment  
Max. Adjustment  
Correct Adjustment  
Procedure:  
Figure 33. Corner Adjustment  
1. Enter Serviceman Mode, Adjust linearity data  
“D03” so that interval of “a” is same as “b” (a=b).  
(See Fig. 35)  
a=b  
a
b
Figure 35. Linearity adjustment  
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V-Correction Adjustment (D02)  
Preparation:  
1. Apply a Crosshatch pattern.  
Stereo Separation Adjustment  
(M01 & M02)  
Preparation:  
2. Adjust (D01) so that V-Size is regular size.  
3. If b-a<-1.5mm (in top and bottom), increase (D02)  
by one step and adjust (D01) so that V-Size is  
regular; repeat steps until b-a1.5mm  
1. Connect an RF signal generator to the RF antenna  
input.  
2. Connect oscilloscope to TPE10.  
4. If b-a>-1.5mm (in top and bottom), decrease (D02)  
by one step and adjust (D01) so that V-Size is  
regular; repeat steps until b-a1.5mm.  
Procedure:  
1. Select Stereo Mode in Audio menu  
2. Apply the following signal from the RF signal  
generator:  
Video: 100 IRE flat field, 30% modulation.  
Audio: 300Hz, 100% modulation, stereo (left only)  
(70 ±5dB, 75OPEN, P/S 10dB).  
a
3. Adjust the MTS Low-Level Separation Adjustment  
(M01) until the amplitude displayed on the scope  
is minimum.  
b
4. Apply the following signal from the RF  
signal generator:  
Figure 36. V-Adjustment  
Video: 100 IRE flat field, 30% modulation.  
Audio: 3KHz, 100% modulation, stereo (left only)  
(70 ±5dB, 75OPEN, P/S 10dB).  
5. Adjust the MTS High-Level Separation Adjustment  
(M02) until the amplitude displayed on the scope is  
minimum.  
MTS Circuit Adjustments  
The MTS Circuit Adjustments require two steps:  
1. Input Level Adjustment.  
6. Repeat above steps 2 through 5 until the amplitude  
is minimum for both signals.  
2. Stereo Separation Adjustment.  
Input Level Adjustment (M00)  
Preparation:  
1. Connect an RMS meter with filter jig as shown in  
Fig. 37.  
TPE11  
RMS  
METER  
10k  
4700p  
Figure 37. Filter Jig  
2. Connect an RF signal generator to the RF  
antenna input.  
Procedure:  
1. Apply the following signal from the RF signal  
generator:  
Video: 100 IRE flat field, 30% modulation.  
Audio: 300Hz, 100% modulation, monaural  
(70 ±5dB, 75OPEN, P/S 10dB).  
2. Adjust the MTS Input Level Adjustment (M0) until  
the voltage measured is 106 ± 6.0mV rms.  
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Service Adjustments (Electronic Controls, cont.)  
3. Calculate and set S07 based on the  
Clock Adjustment (S07)  
Preparation:  
Connect the frequency counter to TPS1 (IC001  
following formula:  
S07 = 128 + { 873.90625 pin13[Hz]} 968  
pin-13) and cold ground ( ).  
Note: Frequency Counter probe capacitance should  
be 8pF or less.  
Figure 38. Set Turned ON  
Procedure:  
1. Measure TPS1 (IC001 pin 13) for the frequency of  
the waveform and record the reading.  
S07 = 128 + { 218.47656 pin13[Hz]} 3873  
Note: Pin 13 measurement must have at least four  
digits of resolution following the decimal point.  
Example: 000.0000  
2. Place the Receiver into Serviceman Mode for  
making electronic adjustment, select the Clock  
Adjustment DAC (S07).  
Figure 39. Set Turned OFF  
Note: Pin 13 measurement will not change  
regardless of the value stored in S07.  
Service Adjustments (Mechanical Controls)  
Focus (part of T551)  
This adjustment is to make the picture clear  
Preparation:  
Connect a Signal generator and select a dot pattern.  
Procedure:  
Adjust the FOCUS controls to obtain the sharpest and  
clearest dot pattern.  
a. Adjust VF1 to minimize width on vertical lines on  
corners.  
b. Adjust VF2 to minimize width on horizontal lines  
on corners.  
- 31 -  
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