Sanyo CP21SE1 - Service Adjustments

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Service Adjustments
Following adjustments are not required to readjust when replacing the memory IC.
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 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 24.0 KV and 26.0 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 27.5 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
3 2
E
7
9
7
10
D610
31
J607
R690
D613
R607
D611
J604
J602
JW8
T611-H10 T611-H11
T611-H13
T611-H7
R355
C641
L631
C471
T471-H2
T471-H4
T4
T471-H1
KDY-1
D507
KDY
Q401
R411
J613
+B
ADJUST
R650
JP665
TP-B
JP671
R685
R691
VR631
D686
C691
R525
R635
D631
R352
T611-H12
0
R410
J605
C356
(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 130 ± 0.5V 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
MAIN BOARD
B-Voltage Supply Adjustment
MAIN BOARD
TP-B
E
R355
L631
C471
T471-H11
T471-H2
T471-H4
T471-H7
T471-H10
T471-H1
R424
KDY
4
11
J613
R650
JP665
TP-B
6
71
1
C356
Focus VR
(Upper side)
SM_21-BB2V;W(AC6-A1)Aus,NZ 10/10/06 8:12 AM Page 15