Input-4 No Audio (Hdmi Connected); Input-5 No Audio (Hdmi Connected) - Sharp LC-37D44U Service Manual

LC-37D44U

INPUT-4 No audio (HDMI connected)

INPUT-5 No audio (HDMI connected)

[INPUT-4 input]
Is INPUT-4 selected on the input select menu screen?
[INPUT-5 input]
Is INPUT-5 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
[INPUT-4 input] If no video appears, refer to "No external input video
(HDMI) [INPUT-4]".
[INPUT-5 input] If no video appears, refer to "No external input video
(HDMI) [INPUT-5]".
Is the HDMI_MUTE line as specified?
Check Q1301, IC1302 and their peripheral circuits.
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
YES
NO
YES
YES
No audio (4)
Check the line between IC8001 and IC2701, and their
NO
peripheral circuits. (AMP_MUTE line, etc.)
NO Check IC2701 and its peripheral circuits.
6 – 12