Sharp LC-15AV7U User Manual

7-5
A7121TS
Ye s
Ye s
No
Ye s
No
+12V is not output.
FLOW CHART NO.16
Is approximately
12V voltage supplied to the
cathode of D902?
Check if there is any leak or short-circuit on
the loaded circuit and service it if defective.
Check D902, C902 and their periphery circuit, and
service it if defective.
Check Q918, D940 and their periphery circuit, and
service it if defective.
Check Q916 and P-ON-H line, and
service it if defective.
P-ON+9V is not output.
FLOW CHART NO.17
Ye s
No
Is approximately 12V voltage supplied to the
cathode of D902?
Is approximately 11.8V voltage supplied to the
collector of Q923?
No
Is the voltage of base on Q923 lower than the
voltage of emitter on Q923 when turning the
power on?
See FLOW CHART No.16
No
DTV-ON+1.8V is not output.
FLOW CHART NO.18
Is approximately 3
.3V voltage supplied to the
cathode of D911?
Check IC904 and their periphery circuit,
and service it if defective.
Check D911, C908 and their periphery circuit, and
service it if de
fective.
Ye s
Replace Q923.
No
P-ON+5V(1) is not output.
FLOW CHART NO.15
Is approximately 6.8V voltage supplied to the
cathode of D903?
Check Q903, D921 and their periphery circuit,
and service it if defective.
Ye s
See FLOW CHART No.11

Sharp LC-15AV7U Specifications

General

Brand	Sharp
Model	LC-15AV7U
Category	TV
Language	English