Sharp LC-50U35T, Service Manual

Page: 36 / 102

LC50/58/65U35T
6 – 14
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?
NO
Refer to "No video at
UHF/VHF broadcast
signal reception". Is TV selected on the input
select menu screen?
NO
Refer to "No video
at digital broad-
cast signal recep-
tion".
YES YES
Is selecting "Fixed" of "Audio Out > Stereo Minijack > Output Select" on the setting menu screen ? NO Set the audio out-
put to "FIXED".
YES
˜ 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) ?
NO
Check the line
between IC3303
and IC1701 /
IC1801, and their
paripheral circuits.
YES
˜
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)?
NO
Check IC1701 /
IC1801 and its
paripheral circuits.
YES
˜ 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.