Sharp LC-19LE430E Service Manual page 51

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 (13&14) of TUNER (TU101)/ pin
(10&11) of TUNER (TU102)?
Is the IF signal sent to pin (184&185) of IC U401?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to SCART go out?
TEREMINAL UNIT:
Is the audio signal properly sent to pin (6) (SCT1_AUL_IN) and pin
(2) (SCT1_AUR_IN) of SCART (CN151)?
Is the audio signal properly sent to pin (2&15) of IC U605?
Is the audio signal properly sent to pin (194&196) of IC U401?
Refer to "No sound output in all modes".
Does not the sound of the audio signal input to AV (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 (5) and pin (14) of IC U605?
Is the audio signal properly sent to pin (194&196) of IC U401?
Refer to "No sound output in all modes".
LC-19LE430E/UK, LC-22LE430E/UK, LC-26LE430E/UK, LC-32LE430E/UK
No sound (during the reception of TV broadcasting)
↓
↓
↓YES
↓YES
No sound from external input devices (1)
↓
↓
↓YES
↓YES
↓YES
No sound from external input devices (2)
↓
↓
↓YES
↓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 U605
NO
Is the audio signal properly sent to pin (194&196) of IC U401?
NO
Check the connection to CN116 and the external input device.
NO
Check the line between CN116 and IC U605.
NO
Check the line between U605 and IC U401
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