Sharp LC-22LE320 Service Manual page 117

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 SCART2 go out?
TEREMINAL UNIT:
Is the audio signal properly sent to pin (6) (SCT2_AUL_IN) and pin
(2) (SCT2 AUR IN) of SCART2 (CN152)?
Is the audio signal properly sent to pin (AC36) and pin (AB37) of IC
U401?
Refer to "No sound output in all modes".
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
No sound (during the reception of TV (DIGITAL) broadcasting)
↓
↓
↓YES
↓YES
No sound from external input devices (1)
↓
↓
↓YES
↓YES
No sound from external input devices (2)
↓
↓
↓YES
↓YES
2008-03-14
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 setting of an external input device that connects of
CN152
NO
Check the line between CN152 and IC U401
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