Sharp LC-60LE660U Service Manual page 47

[PC analog audio input] PC-IN No audio.
Is PC-IN selected on the input select menu screen?
Refer to ":No external input video [PC-IN]".
YES
Is the audio output selected for "Variable" on the menu screen?
Set the audio output to "Fixed".
YES
Does the audio signal come from pins(2)(L) and (3)(R) of input terminal(J501) to pins(8)(L) and (9)(R) of IC3301(CPU)?
Check the audio line between J501 and IC3301.
YES
Does the analog audio signal come from pins(11/12)(SP_L/SP_R) of IC3301(CPU) to pins(22/32)(SP_L/SP_R) of IC1701(Audio AMP)?
Check the audio line between IC3301 and IC1701, and their paripheral circuits.
YES
•About the L/R Speakers.
Check the connector (P1701) L/R speakers and their peripheral circuits.
No audio (2)
NO
NO
6 – 13
[HDMI analog audio input] HDMI2 No audio.
Is HDMI2 selected on the input select menu screen?
Refer to ":No external input video [HDMI2]".
YES
Is the audio output selected for "Variable" on the menu screen?
Set the audio output to "Fixed".
YES
Is the "Initial Setup" - "Audio select" selected for "HDMI + Analog"
on the menu screen?
Set the HDMI audio output to "HDMI+Analog".
YES
NO
NO
LC-60/70LE660U,C6600U
NO
NO
NO