LC-37D44U
6 – 10
No audio (3)
No audio at UHF/VHF broadcast signal reception No audio at digital broadcast signal reception
Is TV selected on the input select menu screen? Is TV selected on the input select menu screen?
YES
NO
YES
NO
Is the audio output selected for “VARIABLE” on the
menu screen?
Is the audio output selected for “VARIABLE” on the menu
screen?
Set the audio output to “FIXED”. Set the audio output to “FIXED”.
Is there the SIF signal output at pin(15) of tuner(TU1101)? Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and (20)
of tuner(TU1101)?
YES
NO
YES
NO
Check the tuner(TU1101) and its peripheral circuits. Check the tuner(TU1101) and its peripheral circuits.
Does the SIF signal come from pin(15) of tuner(TU1101) to
pin(AN23) of IC8001?
Does the video signal outputs come from pins(19) and (20) of
tuner(TU1101) to AM33 and AM34 of IC8001?
YES
NO
YES
NO
Check the line between TU1101 and IC8001.
(Q1101,Q1102, etc.)
Check the line between TU1101 and IC8001.
Does the audio signal come from pins(AN28)(SPOUT_LP), (AN29)(SPOUT_RN), (AP28)(SPOUT_LN), and (AP29)(SPOUT_RP) of IC8001 to
pins(5)(SP_LP),(6)(SP_LN), (8)(SP_RN), and (9)(SP_RP) of IC2701(AMP)?
YES
NO
Check the line between IC8001 and IC2701, and their periph-
eral circuits. (AMP_MUTE line, etc.)
Is the audio output from IC2701 as specified? NO Check IC2701 and its peripheral circuits.
YES
Check the connector(P2701), speakers and their peripheral circuits.
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