Sharp LC-32SV502B, Service Manual

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LC-32SV502B/LC-42SV502B/LC-42SV602B/LC-46SV602B/LC-46SV502L
41
No sound (during the reception of TV broadcasting)
↓
Does not the sound go out though the picture has come out when TV is received?
MAIN UNIT:
↓
↓ YES
↓ YES
No sound from external input devices (1)
↓
Does not the sound of the audio signal input to Component go out?
MAIN UNIT:
↓
↓ YES
↓ YES
No sound from external input devices (2)
↓
Does not the sound of the audio signal input to (Composite, Y/C) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
Is the IF signal output from pin (1/2/4/5) of Tuner (TU101)?
NO
Check the tuner and its peripheral circuits. Replace as required.
Refer to “ No sound output in all modes ” .
Is the audio signal properly sent to pin (8)(YPbPr_L_In) and pin
(11)(YPbPr_R_In) of CN108?
NO
Check the connection to CN108 and the external input device.
Refer to
“
No sound output in all modes
”
.
Is the audio signal properly sent to pin (AL29) (YPbPr_L_In1) and
pin (AL31) (YPbPr_R_In1) of IC U401?
NO
Check the line between CN108 and IC U401.
Is the audio signal properly sent to pin (4) (AV1_AudioLIN) and pin
(7) (AV1_AudioRIN) of CN101?
NO
Check the connection to CN101and the external input device.
Refer to “ No sound output in all modes ” .
Is the audio signal properly sent to pin (AM30) (AV_L_In0) and pin
(AM32) (AV_R_In0) of IC U401? NO Check the line between CN101 and IC U401.
Is the IF signal sent to pin (AM24/AL24) of IC U401?
NO
Check IC U401 its peripheral circuits.