Sharp LC-60LE810UN Service Manual - Page 63

IC2701 Audio DSP to pin 5/8/7/6 of IC2703 AMP for L/R?

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Page 63 highlights

No audio (3) LC-40/46/52/60LE810UN (1st Edition) No audio at UHF/VHF broadcast signal reception. No audio at digital broadcast signal reception. Is TV selected on the input select menu screen? Is TV selected on the input select menu screen? NO Refer to "No video at UHF/VHF broadcast signal reception". YES Is the audio output selected for "VARIABLE" on the menu screen? NO YES Refer to "No video at digital broadcast signal reception". If no video appears, refer to "No video at digital broadcast signal reception". NO Set the audio output to "FIXED". Is the audio output selected for "VARIABLE" on the menu screen? YES Is there the SIF signal output at pin (14) of tuner (TU1102)? NO Set the audio output to "FIXED". NO Check the tuner (TU1102) and its peripheral circuits. (I2C line: TUNER_SCL/TUNER_SDA, etc.) YES Does the SIF signal come from pin (14) of tuner (TU1102) to pin (AB27) of IC3302 (CPU)? NO Check the line between TU1102 and IC3302, and their peripheral circuits (Q1101, Q1102, etc.). YES 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. 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 - 9

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LC-40/46/52/60LE810UN (1st Edition)
6 – 9
No audio (3)
No audio at UHF/VHF broadcast signal reception.
No audio at digital broadcast signal reception.
Is TV selected on the input select menu screen?
Is TV selected on the input select menu screen?
YES
NO
YES
NO
Refer to “No video at UHF/VHF broadcast signal
reception”.
Refer to “No video at digital broadcast signal
reception”.
Is the audio output selected for “VARIABLE” on the menu screen?
If no video appears, refer to “No video at digital broadcast signal
reception”.
YES
NO
Set the audio output to “FIXED”.
Is the audio output selected for “VARIABLE” on the menu screen?
YES
NO
Set the audio output to “FIXED”.
Is there the SIF signal output at pin (14) of tuner (TU1102)?
YES
NO
Check the tuner (TU1102) and its peripheral cir-
cuits.
(I2C line: TUNER_SCL/TUNER_SDA, etc.)
Does the SIF signal come from pin (14) of tuner (TU1102) to pin
(AB27) of IC3302 (CPU)?
YES
NO
Check the line between TU1102 and IC3302, and
their peripheral circuits (Q1101, Q1102, etc.).
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.