Sharp LC-19S7E-BK, Service Manual

Page: 41 / 193

2008-03-14
LC-19S7E-BK LC-26S7E-BK LC-32S7E-BK
41
The audio signal is not output (1)
↓
The audio signal of UHF/VHF is not output from SCART1.
TEREMINAL UNIT:
↓
↓ NO
↓ NO
The audio signal is not output (2)
↓
The audio signal of UHF/VHF/MONITOR is not output from SCART2.
TEREMINAL UNIT:
↓
↓ NO
↓ NO
The audio signal is not output (3)
↓
No audio signal output from LINE_AUDIO_OUTPUT terminal.
TEREMINAL UNIT:
↓
↓ NO
↓ NO
Is audio signal output from IC U4201 pin(82)(LINEOUTL1) and
pin(83)(LINEOUTR1) sent to pin (13)(INL) and pin (15)(INR) of IC
U1901?
Is audio signal output from IC U1901 sent to pin (3) (SCLAUO1)
and pin(1)(SCRAUO1) of SCART1(CN1901)? YES Check the connection to SCART1 and external devices.
YES Check the line between IC U4201 and IC U1901.
Check IC U4201 and its peripheral circuits.
Is the audio signal output from IC U4201 pin(80) (LINEOUTL0) and
pin(81) (LINEOUTR0) sent to pin(13)(INL) and pin(15)(INR) of IC
U1201?
Is audio signal output from IC U1201 sent to pin(3)( SCLAUO2) and
pin(1)( SCRAUO2) of SCART2(CN1902)?
YES
Check the connection to SCART2 and external devices.
YES
Check the line between IC U4201 and IC U1201.
Check IC U4201 and its peripheral circuits.
Is the audio signal output from IC U4201 pin(80) (LINEOUTL0) and
pin(81) (LINEOUTR0) sent to pin(13)(INL) and pin(15)(INR) of IC
U1201?
Is audio signal output from IC U1201 sent to pin(4)(AUD_LOUT)
and pin (6)(AUD_ROUT) of connector(CN1205)? YES Check the connection to CN1205 and external devices.
YES Check the line between IC U4201 and IC U1201.
Check IC U4201 and its peripheral circuits.