(No.YA712<Rev.002>)1-17
See FLOW CHART No.9
See FLOW CHART No.9
AL+13V(M+13V) is not output.
FLOW CHART NO.12
Ye s
No
Is approximately +13V voltage supplied to the
cathode of D641 and D642?
Check C639, 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 def
ective.
P-ON+5V is not output. (LCD+16V is outputted normally.)
FLOW CHART NO.10
Is approximately +6.8V voltage supplied to the
collector of Q643?
Is approximately +6V voltage supplied to the
base of Q641 and the base of Q643?
No
Ye s
Ye s
Check D645 and their periphery circuit, and service
it if defective.
No
Replace Q641 and Q643.
P-ON+5V(TUNER+5V) is not output. (LCD+16V is outputted normally.)
FLOW CHART NO.11
Is approximately +6.7V voltage supplied to the
collector of Q640?
Is approximately +6V voltage supplied to the
base of Q641 and the base of Q643(Q640)?
No
Ye s
Ye s
Check D645 and their periphery circuit, and service
it if defective.
No
Replace Q641 and Q643(Q640).
P-ON+3V is not output.
FLOW CHART NO.13
Is approximately +3V voltage supplied to the
cathode of D647?
Ye s
No
Check if there is any leak or shor
t-circuit on
the loaded circuit, and service it if def
ective.
Check C645, D647 and their per
iphery circuit, and
service it if def
ective.
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