Input-8 No Audio; Input-2 No Audio - Sharp LC-52LE640U Service Manual

[PC analog audio input] INPUT-8 No audio.
Is INPUT-8 selected on the input select menu screen?
NO
Refer to ": No external input video [INPUT-8]".
YES
Is the audio output selected for "VARIABLE" on the menu screen?
NO
Set the audio output to "FIXED".
YES
Is the "PC input" - "Audio select" selected for "Video + Audio" on the
menu screen?
NO
Set the "PC input" - "Audio select" to "Video +
Audio".
YES
Does the digital audio signal come from pins (Y32/Y31/Y30/V27) (CPU_AOMCLK/AOBCK/AOLRCK/AOSDATA0) of IC3303 (CPU) to pins (5/7/8/6)
(AMP_MCLK/BCLK/LRCLK/DATA_LR) of IC2703 (AMP for L/R)?
NO
Check the line between IC3303 and IC2703 and their peripheral circuits.
YES
Is the audio output from IC2703 as specified?
YES
Check the connector (P2701) L/R speakers and their peripheral cir-
cuits.
LC-52/60/70LE640U,C6400U (1st Edition)
No audio (2)
[HDMI analog audio input] INPUT-2 No audio.
Is INPUT-2 selected on the input select menu screen?
YES
Is the audio output selected for "VARIABLE" on the menu screen?
YES
Is the "PC input" - "Audio select" selected for "HDMI + Analog" on
the menu screen?
YES
NO Check IC2703 and their peripheral circuits.
6 – 16
NO
Refer to ": No external input video [INPUT-2]".
NO
Set the audio output to "FIXED".
NO
Set the "PC input" - "Analog select" to "HDMI +
Analog.