Sharp 60LE920UN, 52LE920UN service manual Audio14

LC-52LE920UN/LC-60LE920UN

I .o audio14) I

INPUT-5 No audio IHDMI connected I

INPUT-6 No audio IHDMI connected I

IINPUT-4 No audio IHDMI connected I

INPUT-7 No audio IHDMI connected I

[INPUT-4 input]

Is INPUT-4 selected on the input select menu screen? [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

I Refer to ": No external input video [INPUT-4/5/6/7]".

YES

[INPUT-4 input]

If no video appears, refer to "No external input video (HDMI) [INPUT-4]". [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]".

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

YES

_' NO

I Set the audio output to "FIXED".

i

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

_' YES
• About	the	L/R Speakers.		NO	• About	the L/R Speakers.
Is the audio		output from	IC2703		--_	IC2703 and its	peripheral	circuits.
				as specified?	Check
• About	the Subwoofer		Speaker.		• About	the Subwoofer	Speaker.
IS the audio		output from	IC2702	as specified?	Check	IC2702 and its	peripheral	circuits.

_' Yes

• About the L!R Speakers.

Check the connector (P2701) L/R speakers and their periph- eral circuits.

• About the Subwoofer Speaker.

Check the connector (P2702), subwoofer speaker and their peripheral.

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