8-3
FL11.3TR
See FLOW CHART No.8 <P-ON+7V is not output.>
AL+13V is not output.
FLOW CHART NO.11
Yes
No
Is approxi13V voltage supplied to the
cathode of D641 and D642?
Check C639, D641, D642 and their periphery circuit,
and service it if defective.
Check if there is any leak or short-circuit on
the loaded circuit, and service it if defective.
TUNER+5V is not output. (LCD+13V is outputted normally.)
FLOW CHART NO.10
Is approxi6.7V voltage supplied to the
collector of Q640?
Is approxi6V voltage supplied to the
base of Q640?
No
Yes
Yes
Check D645 and their periphery circuit, and service
it if defective.
No
Replace Q640.
P-ON+3V is not output.
FLOW CHART NO.12
Is approxi3V voltage supplied to the
cathode of D647?
Yes
No
Check if there is any leak or short-circuit on
the loaded circuit, and service it if defective.
Check C645, D647 and their periphery circuit, and
service it if defective.
P-ON+3.3V is not output.
FLOW CHART NO.13
Is approxi5V voltage supplied to the
cathode of D633?
Is the "H" signal (approxi4 V) inputted to the
base of Q637?
No
Yes
Yes
Check C633, D633 and their periphery circuit, and
service it if defective.
Check Q638, Q639, D666, P-ON-H2 line and their
periphery circuit, and service it if defective.
No
Replace Q637.
