Audio Is Not Outputted Normally. (Tuner Input.); Audio Is Not Outputted Normally. (Audio Input Terminals.) - Sharp LC-15AV1U Service Manual

3. AUDIO SIGNAL SECTION
FLOW CHART NO.25

Audio is not outputted normally. (Tuner input.)

Are the SIF signal inputted to the Pin(21) of IC851?
Are the audio(L/R) signal inputted to the Pin(4,11) of
IC852?
Are the audio(L/R) signal outputted to the Pin(3,13) of
IC852?
Are the audio(L/R) signal outputted to the Pin(11,14) of
IC801?
Check SP801,SP802,JK801 and their periphery circuit,
and service it if defective.
FLOW CHART NO.26

Audio is not outputted normally. (Audio input terminals.)

Are the audio(L/R) signal inputted to the Pin(1,2,12,15)
of IC852?
Are the audio(L/R) signal outputted to the Pin(3,13) of
IC852?
Are the audio(L/R) signal outputted to the Pin(11,14) of
IC801?
Check SP801,SP802,JK801 and their periphery circuit,
and service it if defective.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check TU1,SF,IC11,CF32 and their periphery circuit,
and service it if defective.
No
Check IC851 and the periphery circuit,
and service it if defective.
No
Check IC852 and the periphery circuit,
and service it if defective.
No
Check IC801 and the periphery circuit,
and service it if defective.
No
Check the line between Pin(1,2,12,15) of IC852 and
each Audio input terminals (JK723,JK724,JK729,JK730),
and service it if defective.
No
Check IC852 and the periphery circuit,
and service it if defective.
No
Check IC801 and the periphery circuit,
and service it if defective.
6-8
L0370TS