LC-52LE920UN/LC-60LE920UN

 

 

 

 

 

 

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Noaudio12)

 

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[PC analo_l audio input] INPUT-3

No audio,

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[HDMI analo_l audio input] INPUT-4 No audio.

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Is INPUT-3

selected

on the input select menu

screen?

 

 

Is INPUT-4 selected

on the input select menu screen?

I

 

 

_' NO

 

 

 

 

NO

 

 

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Refer to ": No external input video [INPUT-3]".

 

 

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Refer to ": No external input video [IN PUT-4]".

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YES

 

 

 

 

 

YES

 

 

Is the audio output selected for "VARIABLE" on the menu screen?

_' NO

I Set the audio output to "FIXED".

YES

Isscreen?the "PC input" - "Audio select for "Video + Audio" on the menu

J' NO

Audio"Set the. "PC input" - "Analog select" to "Video +

YES

Is the audio output selected for "VARIABLE" on the menu screen? I

_' NO

I Set the audio output to "FIXED".

YES

Is the "PC input" -"Audio select" selected for "HDMI + Analog" on the menu screen?

_' NO

Set the "PC input" - "Analog select" to "HDMI +

Analog.

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

Check the line between IC3302 and IC2701, and their peripheral circuits.

YES

• 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)?

_' 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?

_' 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.

NO

NO

Check IC2701 and its peripheral circuits. (X2701, etc.).

• About the L!R Speakers.

Check IC2703 and its peripheral circuits.

• About the Subwoofer Speaker.

Check IC2702 and its peripheral circuits.

6-8

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Sharp 60LE920UN, 52LE920UN service manual Noaudio12