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Service Adjustments
Following adjustments are not required to readjust when replacing the memory IC.
B-VOLTAGE SUPPLY CHECKING
(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.
MAIN BOARD
RC PRE-AMP.
D1910
A1901A
C1902
R1907
L601-H7
F601A
L607
SW601-H1
L601-H2
SW601-H2
L601-H1
SW601-H3
SW601-H4
L608
L601-H6
T4AL250V
L601
SW601
1
2
3
R602-H2
KG-1
KG-2
KG-3
KG
TP-EE
L621
VA602
C607
B-Voltage Supply Adjustment
FOCUS ADJUSTMENT
(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.
MAIN BOARD
T471A
T471-H1
T471-H2
2
1
3
4
T471
T471-H5
FBT
5
6
T471-H7
T471-H8
T471-H10
7
8
10
12
JP402
T471-H12
11
T471-H11
R475
M K
KQ
FOCUS VR (Upper Side)
All manuals and user guides at all-guides.com
POS
VOL
VOL
POS
WHITE
DOWN
UP
UP
DOWN
AUDIO
IN
SW1901
SW1902
SW1903
SW1904
R1903A
R1904A
R1902A
R681
C661
PS601
L601-H8
R683A
PS601-H2
R682
C685
JW18
PS601-H3
PS601-H1
J680
D685
Q661
Q685A
E
R662-H2
L601-H5
KE-2
KE-1
R685A
KE
R636
R602-H3
R602-H4
R602-H1
VR631
J630
+
B ADJ.
R602
C628
R635
JW17
D617
D686
R637
R619
D618
R638
C645
C614
D632
J644
C635
C632
J122
J502
JW14
C631
D631
L631
C521
TP-130V
C641
D501
R355
J504
J450
J510
D432
KDY-6
R434
L445-H2
L445-H1
R435
JP445
R441Z
C441
KDY-1
L441A
L441
T431
C441A
HORIZ.DRIVE
TRANS.
L431
R423
L432
D486
D467
D468
D448
D201
C401
1AA4B10S00900
DIP
1
3
VERTICAL CENTRE
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) Adjust the vertical centre of the picture with SW501.
YELLOW
VIDEO
IN
KG
K1004
IC651
C607
R620
J661
R621
R661-H2
C607-H1
C607-H2
D683
D661
J634
J633
R661-H1
R644-H1
J631
R662-H1
Q641
E
R646
HORIZ. WIDTH ADJUSTMENT
R644-H2
E
(1) Receive the monochrome circular pattern.
R686
L635
(2) Set the brightness and contrast to maximum.
(3) If the picture is too wide, remove "C436" on the main
unit.
4
T471
T471-H5
FBT
5
6
T471-H7
T471-H8
7
8
12
T471-H12
M K
Horizontal Width Adjustment
HIGH VOLTAGE CHECK
Note: +B (+130V) Voltage Check and Grayscale Adjustment
D
must be completed before attempting High Voltage Check.
L445
R35
D350
D35
(1) Connect high voltage voltmeter negative lead to
ground, and connect + lead to anode of picture tube.
(2) Tune receiver to an active channel and confirm TV is
operating properly.
J401
(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
J480
JW21
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.
-14-
Vertical centre
R602
C628
D617
L621
R619
D618
C614
D632
C632
J122
T611
R624-H1
T611-H17
20V
L604
T611-H2
T611-H16
C615
12V
Vertical Cerntre Adjustment
KDY-1
T471-H10
10
JP402
R423
11
D467
T471-H11
R475
KQ
DIP
1
3
+
B ADJ.
Q641
R635
JW17
E
D686
R646
R637
R644-H2
R638
E
C645
Q683
J644
R686
L635
C635
JW16
C662
J643
D635
SW501(V-CENTER)
L634
J642
J648
JW5
J641
J507
D35
R441Z
C441
L441A
L441
T431
C441A
HORIZ.DRIVE
TRANS.
L431
J401
L432
D486
D468
D448
D201
J480
C401
JW21
1AA4B10S00900
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