Sharp LC-52D82U Service Manual page 65

Are the audio signal outputs
at pins (38)(L) and (39)(R) of
IC1404?
YES
Are the audio signal outputs
at pins (11)(L) and (14)(R) of
connector (SC1301) on the
main unit?
YES
Are the audio signal inputs at
pins (11)(L) and (14)(R) of
connector (P2704) on the
TERMINAL unit?
YES
Are the audio signal inputs at
pins (5)(L) and (3)(R) of
IC2701 (STEREO_AMP)?
YES
Is the audio output from
IC2701 as specified?
YES
Check the P2703 connector,
speakers and their peripheral
circuits.
Check IC1404 and its
peripheral circuits.
NO
Check the line between
IC1404 and SC1301, and
NO
their peripheral circuits.
Check the SC1301 and
P2704 connectors.
NO
Check the line between
P2704 and IC2701, and
NO
their peripheral circuits
(AMP_MUTE line).
Check IC2701 and its
peripheral circuits.
NO
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LC-46D82U/LC-52D82U