Power Regulator - JVC AV-2771S Service Manual

AV-2771S
eHOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT
1. High voltage hold down circuit (in MAIN PCB ASS'Y)
e After repair of the high voltage hoid down circuit shown in Fig. 1, this circuit shall be checked to operate correctly.
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r
1C201
O@
OOOO iss
(e) RB532
D543 D531 R531
HEATER
+ +
D544
R533
VT C528
if, C527
R540
Fig. 1
2. Checking method of the high voltage hold down circuit (in POWER PCB ASS'Y)
(1) Make the short circuit across R905 and R909, (shown in Fig. 2) under normal operating condition.
(2) Confirm the picture goes out.
1C901
POWER REGULATOR
D905 TP-91
ois
Fig. 2
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