Sharp AQUOS LC-C3237U, Service Manual

Page: 60 / 128

LC-32D47U/LC-32SB27U/LC-C3237U
6 – 10
No audio (4)
INPUT-5 No audio (HDMI connected)
INPUT-6 No audio (HDMI connected)
INPUT-7 No audio (HDMI connected)
[INPUT-5 input]
Is INPUT-5 selected on the input select menu screen?
[INPUT-6 input]
Is INPUT-6 selected on the input select menu screen?
[INPUT-7 input]
Is INPUT-7 selected on the input select menu screen?
YES
NO
Refer to “: No external input video [INPUT-5/6/7]”.
[INPUT-5 input]
If no video appears, refer to “No external input video (HDMI) [INPUT-5]”.
[INPUT-6 input]
If no video appears, refer to “No external input video (HDMI) [INPUT-6]”.
[INPUT-7 input]
If no video appears, refer to “No external input video (HDMI) [INPUT-7]”.
YES
Is the audio output selected for “VARIABLE” on the menu screen?
YES
NO
Set the audio output to “FIXED”.
Does the audio signal come from pins (C4/A3) (SPOUT_L/R) of IC8001 (CPU) to pins (3) (INLP), and (7)
(INRP) of IC2701 (AMP)?
YES
NO
Check the line between IC8001 and IC2701, and their peripheral circuits (Q1306/
Q1307, AMP_MUTE line, etc).
Is the audio output from IC2701 as specified?
YES
NO
Check IC2701 and its peripheral circuits.
Check the connector (P2701), speakers and their peripheral circuits.