Sharp LC-22LE320 Service Manual page 53

No sound output in all modes?
TEREMINAL UNIT:
Is the audio signal output of pin (U36)(AR3), (V37)(AL3) of IC U401
normal?
Is audio signal input to pin (4)(LINN), pin (11)(RINN) of IC U601
(AMP)?
Is MUTE circuit [ Shutdown, OFF_MUTE] normal?
Is the audio signal output of pin (3, 4) (L-ch) and pin (1, 2) (R-ch) of
CN601 (AOUDIO-CONNECTOR) normal?
Check Speaker Box (right and left) and wire harness.
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
The sound is not emitted from the speaker though the picture has come out.
↓
↓
↓YES
↓YES
↓YES
↓YES
2008-03-14
NO Check IC U401 and its peripheral circuits.
NO
Check the line between IC U605 and IC U601.
NO
Check the Mute circuit. (Q601, Q602 etc.)
NO
Check IC U601 and its peripheral circuits.
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