Sharp Aquos LC-60SQ10U, Service Manual

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LC-60/70EQ10U,SQ10U/15U/17U,TQ15U,UQ17U
6 – 16
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? 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".
Does the digital audio signal come from pins(AR11/AP11/AN9)(CPU_AOBCK/AOLRCK/AOSDATA0) of IC3301(CPU) to pins(8/9/7)(SP_BCLK/
SP_LRCLK/SP_DATA) of IC1702(Audio DSP)?
YES
NO
Check the line between IC3301 and IC1702, and their paripheral circuits.
• About the L/R Speakers.
Does the digital audio signal come from pins (27/29/32/34) of IC1702 (Audio DSP) to pin (4/3/2/1) of IC1903 (connector for L/R)?
YES
NO
Check IC1702 and its paripheral circuits.(X1701, etc.)
• About the L/R Speakers.
Check the connector (P1903) L/R speakers and their peripheral circuits.