Sharp LC-26SH330, Service Manual

Page: 74 / 223

LC-26SH330, LC-32SH330, LC-42SH330
74
No sound from external input devices (5)
↓
Does not the sound of the audio signal input to HDMI1/2/3 go out?
↓
↓ YES
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
Refer to
“
No sound output in all modes
”
.
Is picture of the signal input from HDMI1/2/3 displayed?
NO
Refer to
“
Does not the picture of the HDMI signal input to
HDMI1/2/3 go out?
”
.
Is audio signal output from IC U401 is sent to pin (2)(1IN-) and
pin (6)(2IN-)of IC U107?
Is audio signal output from IC U605 sent to
pin(3)(SCT2_AUL_OUT) and pin(1)(SCT2_AUR_OUT) of
YES
Check the connection to SCART2 and external devices.
YES
Check the line between IC U401 and IC U107
Check IC U401 and its peripheral circuits.
Is audio signal output from IC U401 is sent to pin (2)(1IN-) and
pin (6)(2IN-)of IC U106?
Is audio signal output from IC U106 sent to pin
(3)(SCT1_AUL_OUT) and pin(1)(SCT1_AUR_OUT) of
SCART1(CN151)? YES Check the connection to SCART1 and external devices.
YES Check the line between IC U401 and IC U106.
Check IC U401 and its peripheral circuits.