Sharp LC-37D44U Service Manual page 51

Is the audio output from the monitor set at "VARIABLE" or "FIXED"
on the menu screen?
Are there the audio signal outputs at pins(24)(LINE_L) and
(25)(LINE_R) of IC1403(CODEC)?
Does the audio signal come from pins(24)(LINE_L) and
(25)(LINE_R) of IC1403 to pins(2)(R) and (4)(L) of J505?
No monitor audio output
YES
YES
NO Check the bus line(SCL0/SDA0) and IC1403.
NO Check IC1403 and its peripheral circuits.
NO Check the line between IC1403 and J505. and their periph-
eral circuits.
Check the LINE_MUTE line and its peripheral circuits.
(Q507 thru Q509, etc.)
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LC-37D44U