Sharp LC32SB27U Service Manual - Page 60

No audio 4, INPUT-5 No audio HDMI connected, INPUT-6 No audio HDMI connected, INPUT-7 No audio HDMI

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Page 60 highlights

LC-32D47U/LC-32SB27U/LC-C3237U 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? NO YES 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? NO YES 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 Is the audio output from IC2701 as specified? NO Check the line between IC8001 and IC2701, and their peripheral circuits (Q1306/ Q1307, AMP_MUTE line, etc). NO YES Check IC2701 and its peripheral circuits. Check the connector (P2701), speakers and their peripheral circuits. 6 - 10

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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.