Sharp LC-50U35T Service Manual page 34

LC50/58/65U35T
Component/VIDEO No audio.
Is Component/VIDEO selected on the input select menu screen?
Is selecting "Fixed" of "Audio Out > Stereo Minijack > Output Select" on the setting
menu screen ?
Does the audio signal come from pins(2)(L) and (4)(R) of input terminal(J502) to
pins(C37)(L) and (A36)(R) of IC3303(CPU)?
About the L/R speakers.
Does the digital audio signal come from pins(AP36/AM31/AN30/ AN31)(SP_MCLK/
SP_BCLK/SP_LRCLK/SP_LR_DAT) of IC3303(CPU) to pins(5/6/7/8)(SP_MCLK/
SP_LR_DAT/SP_BCLK/SP_LRCLK) of IC1701(Audio AMP) ?
About the Subwoofer speaker.
Does the digital audio signal come from pins(AP36/AM31/AN30/AM30)(SP_MCLK/
SP_BCLK/SP_LRCLK/SP_WF_DAT) of IC3303(CPU) to pins(5/6/7/8)(SP_MCLK/
SP_WF_DAT/SP_BCLK/SP_LRCLK) of IC1801(Audio AMP) ?
About the L/R Speakers.
Does the audio signal come from pins (10/14/26/30) of IC1701 (Audio AMP) to pin
(6/5/4/3) of P1702 (connector for speaker)?
About the Subwoofer speaker.
Does the audio signal come from pins (10/14/26/30) of IC1801 (Audio AMP) to pin
(1/2) of P1702 (connector for speaker)?
About the L/R Speakers.
Check the connector (P1702) L/R speakers and their peripheral circuits.
About the Subwoofer Speaker.
Check the connector (P1702) L/R speakers and their peripheral circuits.
No audio (1)
YES
YES
YES
YES
YES
6 – 12
Refer to "COMPONENT:No external input
NO
video [Component/VIDEO]"
or "COMPOSITE:No external input video
[Component/VIDEO]".
NO Set the audio output to "Fixed".
NO Check the line between J502 and IC3303.
Check the line between IC3303 and IC1701 /
IC1801, and their paripheral circuits.
NO
Check IC1701 / IC1801 and its paripheral cir-
cuits.
NO