Service Adjustments - Sanyo CT29FS1 Service Manual

Service Adjustments

Following adjustments are not required to readjust when replacing the memory IC.
B-VOLTAGE SUPPLY CHECKING
(1) Connect DC meter to TP-B 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 145 ± 0.5V DC by using VR631.
MAIN BOARD
R643
JW1
C631
J631
D633
C633
4
L633
L634
D648
L635
18
16
9 10
1
1
C617A
T611A
T611
J610
C617
R607
D611
J611
L604
C616
J605
J604
D613
IC601
R628
R605
D612
IC601-1
D614
D609 R610
R611
J612
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
C422A
C422
C420
JP428
R478
C427A
D423 C427
R460
C441A
C441
L441-H1
L441A
T471-H2
L441
3 R422
9
R435
J424
R424
JP435
R474
R411
C437
R636
J513
R511
R534
J536
J537
J648
R510
J641
J538
C648
J649
J650
F686
J539
C686
D421
R421
L462-H2
R470
R427
D460
R355
R473
R471
JW9
L462-H1
R466
R450
R426
R487
C465
D464 D423
R489
R460
R462
R482
R467
D465 D422
R476
J480
R477
J477
R459
C426
R461
R629
TP-B
D461 R423
D469
R409
L403
JW10 R435
C629
D466 JP435
R411
D485
T471
J472
J473
J474
T471-H10
T471-H1
T471-H8
T471-H7
T471-H6
T471-H4
T471-H5
A30C5
HIGH VOLTAGE CHECK
Note: +B (+145V) Voltage Check and Grayscale Adjustment
must be completed before attempting High Voltage Check.
(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.
(3) Maximize the beam current by adjusting the contrast
J509
and brightness controls to maximum. Confirm high
voltage is within 28.0 KV and 30.0 KV at maximum
beam current.
(4) Eliminate the beam current by adjusting the contrast
and brightness controls to minimum. Confirm high
KD
KDY-6
voltage does not exceed 31.5 KV at zero beam current.
C424A
C424
If reading is not within range, check horizontal circuit.
D439
C422A
No high-voltage adjustment is provided on this chassis.
C422
JP428
R478
C427A
C427
C441A
C441
L441-H1
L441A
L441
R422
J424
R424
R474
R484
R481
Focus VR
(Upper side)
-16-