P-On+21V Is Not Output; Amp+13V Is Not Output; Al+3.3V Is Not Output - Philips LF501EM4 Service Manual

FLOW CHART NO.5

P-ON+21V is not output.

FLOW CHART NO.6

AMP+13V is not output.

FLOW CHART NO.7
[TYPE A]

AL+3.3V is not output.

Replace IC651.
[TYPE B]
AL+3.3V is not output.
Replace IC651.
Yes
Yes
Yes
Yes
Yes
No
Check C651, C652, D650 and their periphery circuit.
Repair it if defective.
No
Check C654, C655, D653, D654, D655 and their
periphery circuit. Repair it if defective.
No
Check C654, C655, D653, D654, D655, R676, R678,
R679 and their periphery circuit. Repair it if defective.
No
Check C654, C655, D653, D654, D655, R676, R678,
R679, R683, R684, R688, R689 and their periphery
circuit. Repair it if defective.
No
Check Q657, R688, R689 and their periphery circuit.
Repair it if defective.
8-2 FL13.16ATR