Audio Is Not Outputted Normally. (Tuner Input); Audio Is Not Outputted Normally. (Tuner Input (Digital)) - Sharp LC-20AV7U 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) signals inputted to the Pins(1,12) of
IC852?
Are the audio(L/R) signals outputted to the Pins(3,13)
of IC852?
Are the audio(L/R) signals outputted to the Pins(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. (Tuner input (Digital))

Are the DIF signals outputted to the Pins(11, 12)
of CN62?
Are the audio (L/R) signals outputted to the
Pin(15, 16) of CN62?
Are the audio (L/R) signals inputted to the
Pins(5, 14) of IC852?
Are the audio (L/R) signals outputted to the
Pins(3, 13) of IC852?
Are the audio (L/R) signals outputted to the
Pins(11, 14) of IC801?
Check SP801, SP802, JK801 and their periphery
circuit, and service it if defective.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check TU61, IC31, SF11 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 Pins(11, 12) of CN62 and
TU61, and service it defective.
No
Replace DTV MODULE CBA UNIT.
No
Check the line between Pins(5, 14) of IC852 and
CN62, and service it 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.
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A7144_45TS