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No sound
Check following steps.
Check audio output circuit.
Check speaker, connection of the terminal “K8F”.
Yes
Check IC001 and peripheral circuit.
Check the Mute signal at pin 1 of IC001. The Mute signal is output from
pin 267 of IC 301<Scaler>.
The OUT_DET signal is sent from Audio Out terminal.
Mute-On: H at pin 267 of IC301, L at pin 1 of IC001.
Check if the audio sig-
nal is observed at pins
20 and 23 of IC001.
Yes
No
Check IC5001 and peripheral circuit.
Check the 12V power supply.
Check if the audio sig-
nal is observed at pins
7 and 15 of IC5001.
No
Troubleshooting