-16-
Service Adjustments
1
2
4
3
E
E
T4AL250V
F601
AC5D
140
E
R449
D683
J683
Q613-H6
Q613-H5
Q613-H4
R423
R423A
D466
C641-H1
C641-H2
R644-1
J634
J635
R620
J603
J144
C605
C606
C604
L606
R625
R627
C628
D615
R602-H2
J140
J138
L603A
TP-E
T471-H1
T611-H11
C616
J146
J145
T611-H2
D606
D605
R624Z
C613
C617
D618
D619
D616
D617
D614
R622
R626
C614
Q612
C615
R615
R617
R623
R611
Q611
C632
TP5
R602-H5
R602-H1
R619
C607-H1
C607-H2
J163
L604
T611-H5
T611-H12
T611-H13
T611-H17
R621
Q613
Q613-H2
Q613-H3
C629
R629
R628
T611-H8
T611
C
61
6A
F601B
F601A
C607
L603
Q613-H1
C471
R424
R435
C426
J448
R355
J449
R474
D469
C468
VR462
J468
R468
R464
R469
R472
R480
C462
C463
R461
C466
R466
D461
R467
C470
D465
R471
D464
Q462
C467
R463
R473
Q461
Q461A
Q461-H2
Q461-H1
R465
R462
J480
J4
KDY-4
KDY-5
KDY-6
VR631
D641
R639
R638
R637
R635
C641
D631
L605
C631
J141
D633
C633
C643
R643
D635
C635
L635
C645
R
64
4A
D634
C634
J462
D685
C685
R686
L634
C644A
C644
Q613-1
IC651
JW2
R683
JP501
J503
J502
J641
J6
R681
C524
R524
R528
JW3
R426
D608
C619
R603
D607
R604
C618
Q610
J607
TP-B
R624
J143
J606
H-WIDTH ADJ.
+ B ADJ.
POWER OUT
(1) Connect DC meter to TP-B (R435) and the ground.
(2) Tune the receiver to an active channel and synchro-
nized picture. Select NATURAL picture mode by press-
ing the
PICTURE MODE
button on the remote control.
(3) Adjust B-voltage to be 140 ± 1V DC by using VR631.
B-VOLTAGE SUPPLY CHECKING
Note:
+B (+140V) Voltage Check and Grayscale Adjustment
must be completed before attempting High Voltage Check.
(1) Connect high voltage voltmeter negative lead to
ground, and c lead to anode of picture tube.
(2) Tune receiver to an active channel and confirm TV is
operating properly.
(3) Maximize the beam current by adjusting the contrast
and brightness controls to maximum. Confirm high
voltage is within 28 KV and 30 KV at maximum
beam current.
(4) Eliminate the beam current by adjusting the contrast
and brightness controls to minimum. Confirm high
voltage does not exceed 32 KV at zero beam current.
If reading is not within range, check horizontal circuit.
No high-voltage adjustment is provided on this chassis.
HIGH VOLTAGE CHECK
(1) Receive the monochrome circular pattern.
(2) Set the brightness to normal and contrast to maximum.
(3) Adjust the focus control on the F.B.T. for the best focus
on the screen centre.
FOCUS ADJUSTMENT
TP-B (R435)
(1) Receive a monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) Adjust VR462 for optimum horizontal width
.
HORIZ. WIDTH ADJUSTMENT
E
3
2
1
140
H OUT
Q432-H6
Q432-H4
R449
Q613-H6
R423
R423A
D466
J140
T471-H2
T471-H1
T611-H11
T611-H5
T611-H12
T611-H13
C629
R629
R628
T611-H8
C422
C471
R424
R435
C426
J448
R355
J449
R474
D469
C468
VR462
J468
R468
R464
R469
R472
R480
C462
C463
R461
C466
R466
D461
R467
C470
D465
R471
D464
Q462
C467
R463
R473
Q461
Q461A
Q461-H2
Q461-H1
C464
R465
R462
J480
J461
R445
KDY-3
KDY-4
KDY-5
KDY-6
J441
C641
D631
L605
C631
J141
D633
C633
C643
R643
J462
JP501
J503
J502
J641
J605
C524
R524
R426
C540
KDY
C619
R603
D607
R604
J607
TP-B
C420A-H1
H-WIDTH ADJ.
VR462
MAIN BOARD
(1) Receive a monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) Adjust the vertical centre of the picture with SW501.
VERTICAL CENTRE
Vertical centre
1
1
27
10
20
28
54
30
40
50
5
IC501-H4
IC501-H2
R529
C275
R103
C641-H1
C641-H2
R237
R115
J342
J225
J828
L240
J823
R230
J829
J843
R357
J848
R228
J826
J825
08
C009
C107
R434
R512
D512
C518
Q683
R682
R683
D501
C521
C511
J515
R515
R514
R522
C515
C514
C515A
J513
R681
J511
C524
R528
J512
J205
KP
J352
D353
C231
J283
J287
X211
R352
C244
C247
R211
L234
C233
C225
C185
L236
L235
C358
C122
C232
C201
C202
C210
IC201
IF/VIDEO/CHROMA
X161A
X161
J121
X171
L175
R173
C132
J204
J341
J340
J126
J125
D421
J359
J358
J357
J356
J354
C520
R519
J353
J203
R518
E
B
R516
JW15
J518
D357
J514
J285
R243
IC501
VERT.
OUT
SW501
V-CENTER
ADJ.
SW501
VR631
E
E
10
7
6
5
4
3
2
1
8
9
GND
HEATER
LOW B
ABL
AFC
140
H OUT
210
Q432-H6
Q432-H7
Q432-H4
Q432-H5
R449
R103
D485
R488
D467
R423
R423A
D466
C465
C641-H1
C641-H2
T471-H8
T471-H7
T471-H5
T471-H2
T471-H1
T471-H10
T611-H11
T611-H8
T471
R481
Q432
C423
C423-H1
C423-H2
C423-H3
D438
C420
C420-H1
C420-H2
C420-H3
C423A
C420B
C424A
C424
D439
C422
C422A
JP436
L432
L431
C425
C425A
KQ
C486
JP476
C471
R424
R435
C426
J448
R355
C442
C442A
L442
J449
R474
D469
C468
VR462
J468
R468
R464
R469
R472
R480
C462
C463
R461
C466
R466
D461
R467
C470
D465
R471
D464
Q462
C467
R463
R473
Q461
Q461A
Q461-H2
Q461-H1
C464
R465
R462
J480
J461
R485
R487
D486
Q449
C449
D448
R479
R475
C469
R476
D468
R445
J642
C424-H1
C425-H1
C424-H3
C424-H2
C425-H2
C425-H3
L441-H1
L442-H2
L442-H1
KDY-1
KDY-3
KDY-4
KDY-5
KDY-6
C442-H2
C442-H3
C442-H1
L441-H2
L461
L461A
J441
C641
D631
L605
C631
J141
C643
J462
R683
JP501
J503
J502
J641
J605
R681
C524
R524
R528
R426
C540
KDY
MK
T471-H9
B
E
C
TP-B
J643
L441
R441
C420A
C420A-H2
C420A-H1
R486
1
4
C487
J645
H-OUT
F.B.T.
H-WIDTH ADJ.
Focus VR
(Upper side)