Emerson LC320EM1 - Page 25

8-3 FL10.3TR
See FLOW CHART No.9 <P-ON+7V is not output.>
See FLOW CHAR
T No.9 <P-ON+7V is not output.>
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, D
641, D642 and their periphery circuit,
and service it if de
fective.
Check if there is
any leak or short-circuit on
the loaded circuit, and ser
vice it if defective.
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 Q641 and the collector of Q643?
Is approximately +6V voltage supplied to the
base of Q641 and the b
ase of Q643?
No
Ye s
Ye s
Check D645 and their periphery circuit, and service
it if defective.
No
Replace Q641 or Q643.
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 Q640?
No
Ye s
Ye s
Check D645 and their periphery circuit, and service
it if defective.
No
Replace 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 short-circuit on
the loaded circuit, and service it if defective.
Check C645, D647 and their periphery circuit, and
service it if de
fective.