-14-
Service Adjustments
Following adjustments are not required to readjust when replacing the memory IC.
E
E
11
10
7
6
5
4
8
DIP
1
3
1AA4B10S00900
AC5C CHASSIS
R441Z
Q432A
J436
2
KDY-1
KDY-3
KDY-4
KQ
T471-H8
T471-H7
T471-H5
T471-H11
T471-H10
T471-H12
Q432
HORIZ. OUT
C436
D486
D468
C436A
R488
JP401
JP402
C471
R424
D485
C491
R475
C486
D467
R422
R423
R492
R485
R484
R426
C469
D476
R479
D448
Q449
C449
R449A
T431
HORIZ.DRIVE
TRANS.
L431
L432
C435-H2
C435-H3
C435-H1
C435A
C435
C437
C441-H3
C441-H2
C441-H1
C441A
C441
R44
1
L441-H3
L441A
L441
L441-H2
L441-H1
D441
01
Q431
D201
C482
C432
C433
R433
R431
D35
J440
J480
J431
J401
GND
HEATER
180 V
MK
12
JW21
C401
J437
R481
R486
D421
T471
FBT
1
2
4
3
E
E
E
E
KG
C635
C634
J648
JW17
JW16
R627-H1
R625-H1
R627-H2
R625-H2
J641
C616Z
C606
D606
R624-H1
R624-H2
R624
T611-H2
R624Z
C613
C617
D614
R622
R626
C615
R611
L604
R625
R627
D610
L621
J145
D618
D619
D616
D617
C614
R617
Q611
C628
J146
C632
J122
R602
D604
C604
D605
C605
R619
R620
R621
D603
J144
C603
SC602
R623
C607-H2
C607-H1
C607
T611-H17
T611
T611-H16
D686
L634
D634
L635
D635
R639
R638
D632
Q631A
R637
+
B ADJ.
R635
Q683
R686
J642
C645
R646
R687
J645
J643
C662
J507
JW5
R644-H2
R644
Q641
8
7
D684
J644
20V
12V
SW501(V-CENTER)
1
2
4
3
E
E
E
E
E
E
E
E
WHITE
POS
DOWN
T4AL250V
F601
3
2
KG
1
AUDIO
IN
YELLOW
POS
UP
VOL
UP
VOL
DOWN
VIDEO
IN
SW1901
SW1902
SW1903
SW1904
C635
JW18
JW17
R627-H2
R625-H2
R602-H4
R602-H1
R601
VA601
SW601-H1
SW601-H2
SW601-H4
SW601-H3
SW601
TP-EE
KE-2
KE-1
C627
JP601
R602-H3
R602-H2
C601
C602
L601-H3
L601-H4
L601-H2
L601-H1
KE
L607
L608
PS601
PS601-H1
PS601-H2
PS601-H3
C606
D606
R624-H2
R624
D614
R622
R626
R
6
R625
R627
D610
L621
J145
D618
D619
D616
D617
C614
R
C628
J146
C632
J122
R602
D604
C604
JP602
D605
C605
R619
D603
J144
C603
VA602
SC602
R623
C607
KG-1
KG-2
KG-3
L601-H7
L601-H8
L601-H5
L601-H6
L601
D686
L635
R639
R638
D632
Q686
Q631A
R637
VR631
+
B ADJ.
R636
R635
R685A
R661-H1
R661-H2
R661
R662-H1
R662-H2
R662
R686
Q685A
R684A
C685
R683A
D685
R682
Q661
IC651
D661
C661
J680
R681
R663
J661
Q681
J630
C681
Q684
J634
C645
R646
C651
D683
J633
J645
R644-H2
R644
R644-H1
J631
Q641
R648
R647
D684
J644
C1902
R1907
R888
R1913
D1910
J1901
R1901A
R1902A
R1903A
R1904A
R1905A
A1901A
K1004
J646
F601A
J601
J1906
RC PRE-AMP.
MAIN BOARD
(1) Connect DC meter to JW17 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 130 ± 1V DC by using VR631.
B-VOLTAGE SUPPLY CHECKING
(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
B-Voltage Supply Adjustment
FOCUS VR (Upper Side)
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) If the picture is too wide, remove
“C436”
on the main
unit.
HORIZ. WIDTH ADJUSTMENT
Horizontal Width Adjustment
MAIN BOARD
(1) Receive the 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
Vertical Cerntre Adjustment
E
E
11
10
7
6
5
4
3
2
1
8
DIP
1
3
1AA4B10S00900
AC5C CHASSIS
R441Z
L445-H2
L445-H1
JP445
L445
Q432A
J436
J432
KDY-1
JW14
J500
R243
KDY-3
KDY-4
KDY-5
KDY-6
KQ
T471-H8
T471-H7
T471-H5
T471-H2
T471-H11
T471-H10
T471-H12
T471A
Q432
HORIZ. OUT
629
R629
C436
D486
D468
C436A
R488
JP401
JP402
C471
R424
D485
C491
R477
R355
L631
R475
C486
D467
R422
R423
R492
R485
R484
R426
C469
D476
R479
D448
Q449
C449
R449A
T431
HORIZ.DRIVE
TRANS.
L431
L432
C435-H2
C435-H3
C435-H1
C435A
C435
R435
C437
C441-H3
C441-H2
C441-H1
C441A
C441
R44
1
L441-H3
L441A
L441
L441-H2
L441-H1
D441
C631
D631
C524
R525
J510
JP501
D432
J502
D501
C517
C521
1A
J504
Q431
R434
C434
D201
C482
J430
C432
C433
R433
R431
D350
D35
J440
R
44
5
J450
J480
D512
J431
R35
C641
D
J401
GND
HEATER
180 V
TP-130V
MK
12
T471-H1
JW21
C401
J437
R481
R486
D421
T471
FBT
Note:
+B (+130V) 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 20.0 KV and 22.0 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 23.5 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