Service Adjustments - Sanyo CP29EF1 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 125 ± 0.5V DC by using VR631.
MAIN BOARD
L632
C632
T611
1
1
R607
R611
D613
C607H1
R603
R604
D612
C610
01
D609
C615
R605
C612
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
C435AH2
R445
KDY-1
KDY-6 KDY-5 KDY-4
KDY-3
D445
R103
635
J606
C631 J404
JP482
D631
R435H2
T611H10
T611AH9
TP-B
T611A R639
D637
J294
R685
J625
D686
C691
C661
TP-B
8
T611H10
9
T611AH9
TP-B
T611A
R639
D637
J294
R685
J625
D686
C691
C661
7
8
C614
D636
C614A
C617 R692
D611
R606
2
3
C616
4
1
D610
R632
L602
R631
IC601
IC601A
D614
C629
R610
??? ***
R423
R424
R355
T471H7
HIGH VOLTAGE CHECK
Note: +B (+125V) 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
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
voltage does not exceed 31.5 KV at zero beam current.
VR631
If reading is not within range, check horizontal circuit.
No high-voltage adjustment is provided on this chassis.
C356
T471H10
Focus VR
(Upper side)
-17-