No Sound from an external input device connected to
EXT1 (SCART 1)
Is IN1-L audio signal sent from X027-1-6A (SCART1) to
D022-4 (TEA6422)
Is IN1-R audio signal sent from X027-1-2A (SCART1) to
D022-25 (TEA6422)
no
Check SCART connector (X027-1) and the cable to
device
v
yes
Is the audio signal sent from D022-12 and D022-13 to
D013?
Check C0150 and C0152
no
Check D022 circuitery (SDA/SCL,…)
v
yes
Is audio signal sent from D013 (TDA15134)?
Check R0155 and R0158
no
Check D013 circitery (R0155, R0158…)
v
yes
Is audio signal sent from D020 (TDA8932)?
Check D020-27/30 and D020-19/22
no
Check +28V_audio and other D020 circuitery
v
yes
Is audio signal on X022 and X021 normal
no
Check connectors
v
yes
Check speakers and wiring
LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
6-22