Sharp LC-32D44U Service Manual page 48

LC-32D44U
No audio at UHF/VHF broadcast signal reception
Is TV selected on the input select menu screen?
Is the audio output selected for "VARIABLE" on the
menu screen?
Set the audio output to "FIXED".
YES
Is there the SIF signal output at pin(15) of tuner(TU1101)?
Check the tuner(TU1101) and its peripheral circuits.
YES
Does the SIF signal come from pin(15) of tuner(TU1101) to
pin(AN23) of IC8001?
Check the line between TU1101 and IC8001.
(Q1101,Q1102, etc.)
YES
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)?
Is the audio output from IC2701 as specified?
Check the connector(P2701), speakers and their peripheral circuits.
NO
NO
NO
YES
YES
No audio (3)
No audio at digital broadcast signal reception
Is TV selected on the input select menu screen?
Is the audio output selected for "VARIABLE" on the menu
screen?
Set the audio output to "FIXED".
YES
Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and (20)
of tuner(TU1101)?
Check the tuner(TU1101) and its peripheral circuits.
YES
Does the video signal outputs come from pins(19) and (20) of
tuner(TU1101) to AM33 and AM34 of IC8001?
Check the line between TU1101 and IC8001.
YES
Check the line between IC8001 and IC2701, and their periph-
eral circuits. (AMP_MUTE line, etc.)
NO Check IC2701 and its peripheral circuits.
6 – 10
NO
NO
NO
NO