Sharp 52LE920UN, 60LE920UN service manual Audio13

LC-52LE920UN/LC-60LE920UN

I .o audio13) I

I	No audio	at UHFNHF broadcast si_lnal reception,	I
I Is TV selected on		the input select menu screen?	I

_' NO

Refer to "No video at UHF/VHF broadcast signal

reception".

YES

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

_' NO

I Set the audio output to "FIXED".

YES
I Is there the SlF signal output at pin (14) of tuner (TUl102)?	I

I	No audio	at di_lital broadcast	si_lnal reception,	I
	Is TV selected on	the input select menu	screen?	]

_' NO

Refer to "No video at digital broadcast signal

reception".

YES

If no video appears, refer to "No video at digital broadcast signal reception".

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

_' NO

I Set the audio output to "FIXED".

_ NO

Check the tuner (TUl102) and its peripheral cir- cuits.

(12C line: TUNEP,_SCL/TUNEP,_SDA, etc.)

YES

Does the SIF signal come from pin (14) of tuner (TUl102) to pin (AB27) of IC3302 (CPU)?

_ NO

Check the line between TUl102 and IC3302, and their peripheral circuits (Ql101, Ql102, etc.).

YES YES

Does the digital audio signal come from pins (F28/F30/G28) (AUBCK/AULP,CK/AOSDATA0) of

IC3302 (CPU) to pin (8/9/7) (SP_BCLK/SP_LP,CLK/SP_DATA) of IC2701 (Audio DSP)?

_' NO

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

YES

• About the L/R Speakers.NO Check IC2701 and its peripheral circuits. (X2701, etc.). 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/P,)?

• 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/P, speakers and their peripheral cir- cuits.

• About the Subwoofer Speaker.

Check the connector (P2702), subwoofer speaker and their periph- eral.

NO

==-=.I_

• About the L/R Speakers.

Check IC2703 and its peripheral circuits.

• About the Subwoofer Speaker.

Check IC2702 and its peripheral circuits.

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