Sharp LC 52SB55U - Page 52

LC-52SB55U
6 – 12
No audio (4)
INPUT-5 No audio (HDMI connected)
INPUT-6 No audio (HDMI connected)
INPUT-7 No audio (HDMI connected)
INPUT-8 No audio (HDMI connected)
[INPUT-5 input]
Is INPUT-5 selected on the input select menu screen?
NO
Is the audio output selected for “VARIABLE” on the
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?
[INPUT-8 input]
Is INPUT-8 selected on the input select menu screen?
Set the audio output to “FIXED”.
YES
[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]”.
[INPUT-8 input]
If no video appears, refer to “No external input video (HDMI) [INPUT-8]”.
YES
Is the HDMI_MUTE line as specified? NO Check Q1301, IC1302 and their peripheral circuits.
YES
Does the audio signal come from pins(AP28/AN28)(SPOUT_LN/P), and (AN29/
AP29) to pins(6/5)(INLM/INLP), and (8/9)(INRM/INRP) of IC2701(AMP)?
NO
Check the line between IC8001 and IC2701, and
their peripheral circuits. (Q1306 thru Q1308,
AMP_MUTE line, etc.)
YES
Is the audio output from IC2701 as specified? NO Check IC2701 and its peripheral circuits.
YES
Check the connector(P2701), speakers and their peripheral circuits.