Sharp LC-60E77UN Service Manual page 60

LC-60E77UN/LC-65E77UM/LC-C6077UN/LC-C6577UM
[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?
[INPUT-8 input]
Is INPUT-8 selected on the input select menu screen?
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]".
Is the audio output selected for "VARIABLE" on the menu screen?
YES
Does the audio signal come from pins (N29/N30) (PGA0OUT_L/R) of IC8001 (CPU) to pins (3/7)(INLP/INRP) of IC2701 (AMP)?
YES
Is the audio output from IC2701 as specified?
YES
Check the connector (P2701), speakers and their peripheral circuits.
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)
NO
Refer to ": No external input video [INPUT-5/6/7/8]".
NO
Set the audio output to "FIXED".
NO
Check the line between IC8001 and IC2701, and their peripheral circuits (Q1306,
AMP_MUTE line, etc.).
NO
Check IC2701 and its peripheral circuits.
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