8-2
PL10.10TR
See FLOW CHART No.7 <P-ON+7V is not output.>
TUNER+5V is not output.
FLOW CHART NO.9
Is approxi6.7V voltage supplied to the
collector of Q637?
Is approxi6V voltage supplied to the
base of Q637?
No
Yes
Yes
Check D659 and their periphery circuit, and service
it if defective.
No
Replace Q637.
P-ON+3.3V(P-ON+3V) is not output.
FLOW CHART NO.10
Is approxi24V voltage supplied to Pin(2) of
IC621?
Is the "H" signal inputted to Pin(7) of IC621?
No
Yes
Yes
Check C632, C1065, D632 and their periphery
circuit, and service it if defective.
Check Q402, Q403, Q638, Q639, P-ON-H1 line,
P-ON-H2 line and their periphery circuit, and service
it if defective.
No
Replace IC621.
Check D1071, R1182 and their periphery circuit, and
service it if defective.
VT+32V is not output.
FLOW CHART NO.6
Is approxi33V voltage supplied to the cathde
of D1070?
No
Yes
Check C1056, D1070 and their periphery circuit, and
service it if defective.
P-ON+7V is not output.
FLOW CHART NO.7
Is approxi7V voltage supplied to the
cathde of D641?
Check C641, C1067, C1068, D641 and their
periphery circuit, and service it if defective.
Yes
No
Check if there is any leak or short-circuit on
the loaded circuit, and service it if defective.
See FLOW CHART No.7 <P-ON+7V is not output.>
P-ON+5V is not output.
FLOW CHART NO.8
Is approxi7V voltage supplied to the
collector of Q636?
Is approxi6V voltage supplied to the
base of Q636?
No
Yes
Yes
Check D659 and their periphery circuit, and service
it if defective.
No
Replace Q636.
