Sharp LC-60LE810UN Service Manual - Page 62

IC3302 CPU to pin 8/9/7 SP_BCLK/SP_LRCLK/SP_DATA of IC2701 Audio DSP?

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Page 62 highlights

LC-40/46/52/60LE810UN (1st Edition) No audio (2) [PC analog audio input] INPUT-3 No audio. [HDMI analog audio input] INPUT-4 No audio. Is INPUT-3 selected on the input select menu screen? Is INPUT-4 selected on the input select menu screen? NO Refer to ": No external input video [INPUT-3]". YES Is the audio output selected for "VARIABLE" on the menu screen? NO Refer to ": No external input video [INPUT-4]". YES Is the audio output selected for "VARIABLE" on the menu screen? NO Set the audio output to "FIXED". YES Is the "PC input" - "Audio select for "Video + Audio" on the menu screen? NO Set the audio output to "FIXED". YES Is the "PC input" - "Audio select" selected for "HDMI + Analog" on the menu screen? YES NO Set the "PC input" - "Analog select" to "Video + Audio". YES Does the digital audio signal come from pins (F28/F30/G28) (AUBCK/AULRCK/AOSDATA0) of IC3302 (CPU) to pin (8/9/7) (SP_BCLK/SP_LRCLK/SP_DATA) of IC2701 (Audio DSP)? NO Set the "PC input" - "Analog select" to "HDMI + Analog. NO Check the line between IC3302 and IC2701, and their peripheral circuits. YES • About the L/R Speakers. NO Does the digital audio signal come from pins (47/43/44/45) of IC2701 (Audio DSP) to pin (5/8/7/6) of IC2703 (AMP for L/R)? • About the Subwoofer speaker. Does the digital audio signal come from pins (47/43/44/46) of IC2701 (Audio DSP) to pin (5/8/7/6) of IC2702 (AMP for SW)? Check IC2701 and its peripheral circuits. (X2701, etc.). YES • About the L/R Speakers. Is the audio output from IC2703 as specified? • About the Subwoofer Speaker. IS the audio output from IC2702 as specified? NO • About the L/R Speakers. Check IC2703 and its peripheral circuits. • About the Subwoofer Speaker. Check IC2702 and its peripheral circuits. Yes • About the L/R Speakers. Check the connector (P2701) L/R speakers and their peripheral circuits. • About the Subwoofer Speaker. Check the connector (P2702), subwoofer speaker and their peripheral. 6 - 8

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LC-40/46/52/60LE810UN (1st Edition)
6 – 8
No audio (2)
[PC analog audio input] INPUT-3
No audio.
[HDMI analog audio input] INPUT-4
No audio.
Is INPUT-3 selected on the input select menu screen?
Is INPUT-4 selected on the input select menu screen?
YES
NO
YES
NO
Refer to “: No external input video [INPUT-3]”.
Refer to “: No external input video [INPUT-4]”.
Is the audio output selected for “VARIABLE” on the menu screen?
Is the audio output selected for “VARIABLE” on the menu screen?
YES
NO
YES
NO
Set the audio output to “FIXED”.
Set the audio output to “FIXED”.
Is the “PC input” - “Audio select for “Video + Audio” on the menu
screen?
Is the “PC input” - “Audio select” selected for “HDMI + Analog” on
the menu screen?
YES
NO
YES
NO
Set the “PC input” - “Analog select” to “Video +
Audio”.
Set the “PC input” - “Analog select” to “HDMI +
Analog.
Does the digital audio signal come from pins (F28/F30/G28) (AUBCK/AULRCK/AOSDATA0) of
IC3302 (CPU) to pin (8/9/7) (SP_BCLK/SP_LRCLK/SP_DATA) of IC2701 (Audio DSP)?
YES
NO
Check the line between IC3302 and IC2701,
and their peripheral circuits.
•
About the L/R Speakers.
Does the digital audio signal come from pins (47/43/44/45) of
IC2701 (Audio DSP) to pin (5/8/7/6) of IC2703 (AMP for L/R)?
•
About the Subwoofer speaker.
Does the digital audio signal come from pins (47/43/44/46) of
IC2701 (Audio DSP) to pin (5/8/7/6) of IC2702 (AMP for SW)?
NO
Check IC2701 and its peripheral circuits. (X2701, etc.).
YES
•
About the L/R Speakers.
Is the audio output from IC2703 as specified?
•
About the Subwoofer Speaker.
IS the audio output from IC2702 as specified?
NO
•
About the L/R Speakers.
Check IC2703 and its peripheral circuits.
•
About the Subwoofer Speaker.
Check IC2702 and its peripheral circuits.
Yes
•
About the L/R Speakers.
Check the connector (P2701) L/R speakers and their peripheral cir-
cuits.
•
About the Subwoofer Speaker.
Check the connector (P2702), subwoofer speaker and their periph-
eral.