Service Adjustments - Sanyo CT21MF2 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 130 ± 1V DC by using VR631.
MAIN BOARD
D606
C607
KG
C606
F601
TP-EE
R604-H1
C607-H1 C607-H2
Q612
J607
J608
J605
R620
L605
D619
R603
D613
R604-H2
D617
R613Z
C613
R615
R613
R609
Q613
R607
Q613-H1
R612-H1 C608
R606 R612
C608A
Q611
E C611A
R612-H2
D611
C611
Q613-H
R624 R628
C615
Q613-H5
R629
1AA4B10S0180A
TP-B
TP-B
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.
D611
C611
Q613-H
R624 R628
C615
Q613-H5
R629
1AA4B10S0180A
TP-B
MAIN BOARD
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R664
D683
J666
R663
J687
D685
Q686
E
R665
C635
R637
E
D662
D686
R639 C646
R638
C628
J688
C610
J655
R643
R686
T611-H2
R642
J645
C644
T611
T611-H14
T611-H4 T611-H13
J633
J632
R518
T611-H11
T611-H7
T611-H10
J505
R516
J509
KDY-6
KDY-5
KDY-4
L441-H2
KDY-3
L441-H1
L441A
KDY-1
R51
T611-H11
T611-H7
T611-H10
J50
R516
J509
KDY-6
KDY-5
KDY-4
L441-H2
KDY-3
L441-H1
L441A
KDY-1
T471-H2 T471-H1
T471
FBT
R488
1 KQ 3
Focus VR
(Upper side)
HIGH VOLTAGE CHECK
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 23.0 KV and 25.0 KV at maximum
D663
J808
beam current.
J502
J403 (4) Eliminate the beam current by adjusting the contrast
J513
J219
J024
and brightness controls to minimum. Confirm high
R510
voltage does not exceed 26.5 KV at zero beam current.
R511
C225
JW3
J401
IC501-H1
C517 If reading is not within range, check horizontal circuit.
R872
J504
C510
No high-voltage adjustment is provided on this chassis.
D512
J514
C520
R519
R515
R514
IC501-H2
C514
R435
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