Sharp LC-42SH330 Service Manual page 46

LC-26SH330, LC-32SH330, LC-42SH330
Does not the sound go out though the picture has come out when TV is received?
MAIN UNIT:
Is the IF signal output from pin (16) and pin (17) of TUNER
(TU102)?
Is the IF signal sent to pin (AH35) and pin (AH37) of IC U401?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to SCART1 go out?
TEREMINAL UNIT:
Is the audio signal properly sent to pin (6)(SCT1_AUL_IN) and pin
(2)(SCT1_AUR_IN) of SCART1 (CN151)?
Is the audio signal properly sent to pin (AA32) and pin (AB33) of IC
U401?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to AV1 (Component) go out?
MAIN UNIT:
Is the audio signal properly sent to pin (2)(AV1_AudioLIN) and pin
(4)(AV1_AudioRIN) of CN116?
Is the audio signal properly sent to pin (AD33) and pin (AC34) of IC
U401?
Refer to "No sound output in all modes".
No sound (during the reception of TV broadcasting)
↓
↓
↓YES
↓YES
No sound from external input devices (1)
↓
↓
↓YES
↓YES
No sound from external input devices (2)
↓
↓
↓YES
↓YES
NO
Check the tuner and its peripheral circuits. Replace as
required.
NO
Check IC U401 its peripheral circuits.
NO
Check the setting of an external input device that connects of
CN151
NO Check the line between CN151 and IC U401
NO
Check the connection to CN116 and the external input
device.
NO Check the line between CN116 and IC U401.
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