LC-32D62U/LC-37D62U 1st
6 – 12
No monitor audio
Is the audio output from the monitor set at “VARIABLE” or
“FIXED” on the menu screen?
NO Check the bus line (SCL0_5/SDA0_5) and IC1404. Replace
as required.
YES
Are the audio signal outputs at pins (40) (L) and (41) (R) of
IC1404?
NO Check IC1404 and its peripheral circuits. Replace as
required.
YES
Are the audio signal inputs at pins (3) (L) and (5) (R) of
IC1408 (BUFF_AMP)?
NO Check the line between IC1404 and IC1408, and their
peripheral circuits.
YES
Are the audio signal outputs at pins (1) (L) and (7) (R) of
IC1408?
NO Check IC1408 and its peripheral circuits. Replace as
required.
YES
Are the audio signal outputs at pins (16) (L) and (14) (R) of
connector (SC1102) on the MAIN unit?
NO Check the line between IC1408 and SC1102, and their
peripheral circuits.
YES
Are the audio signal inputs at pins (16) (L) and (14) (R) of
connector (SC502) on the TERMINAL unit?
NO Check the SC1102 and SC502 connectors.
YES
Check the signal up to the monitor audio output terminal
(J501).
NO Check the MUTE.R line (Q507 thru Q509, etc.).
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