Sharp LC-15AV7U User Manual

7-4
A7121TS
DTV-ON+5V is not output.
FLOW CHART NO.11
Check IC901 and the periphery circuit,
and service it if defective.
Ye s
No
Is approximately 6.8V voltage supplied to the
cathode of D903?
Is approximately 6.6V voltage supplied to the
collector of Q905?
Is the voltage of base on Q905 lower than the
voltage of emitter on Q905 when turning the
power on?
Ye s
Replace Q905.
No
AL+1.2V(D) is not output.
FLOW CHART NO.13
Is approximately 3.3V voltage supplied to the
Pin(3) of IC901?
AL+3.3V(D) is not output.
FLOW CHART NO.12
Is approximately 6.8V voltage supplied to the
cathode of D903?
No
Ye s
Check D903, C903 and their periphery circuit, and
service it if defective.
Ye s
Check Q907, D922 and their periphery circuit, and
service it if defective.
Ye s
See FLOW CHART No.12
See FLOW CHART No.11
Check Q902, D920 and their periphery circuit,
and service it if defective.
No
AL+3.3V(A) is not output.
FLOW CHART NO.14
Is approximately 6.8V voltage supplied to the
cathode of D903?
Check Q901, D916 and their periphery circuit,
and service it if defective.
Ye s
See FLOW CHART No.11
No
Check Q906 and DTV-ON-H line, and
service it if defective.
No

Sharp LC-15AV7U Specifications

General

Brand	Sharp
Model	LC-15AV7U
Category	TV
Language	English