Sharp LC-32WD1E/S/RU Service Manual page 55

LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
No Sound from an external input device connected to
EXT3 (Side IO)
Is the audio signal leaving the SideIO PCB?
Check on pin X014-5 and X014-7
Is audio signal present on mainboard connector X0208?
Check X0208-5 and X0208-7
Is audio signal arriving on D013?
Check C0158 and C0159
Is audio signal sent from D013 (TDA15134)?
Check R0155 and R0158
Is audio signal sent from D020 (TDA8932)?
Check D020-27/30 and D020-19/22
Is audio signal on X022 and X021 normal
Check speakers and wiring
yes
yes
yes
yes
yes
yes
if audio cable is connected according user manual,
check/replace SideIO
no
Check/replace cable
no
Check D010 input circuitery
no
Check D013 circitery (R0155, R0158...)
no
Check +28V_audio and other D020 circuitery
no
Check connectors
no
6-24