Sanyo PLC-WXU300 - Troubleshooting: No Sound; Audio Signal and Amplifier Checks

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Troubleshooting
No Sound
Check following steps.
Check IC5001 and peripheral circuit.
Check 12V power supply.
Check if the audio signal
is observed at pins 7 and
15 of IC5001.
Check audio output circuit.
Check speaker, connection of the terminal “K8F”.
Yes
No
Check IC001 and peripheral circuit.
Check 12_AMP power supply(IC5601).
Check the Mute signal at pin 5 of Q5035. The Mute signal is output from
pin 350 of IC 301<Scaler>. The OUT_DET signal is sent from Audio Out
terminal.
Mute-On: H at pin 350 of IC301.
Check if the audio signal
is observed at pins 15
and 22 of IC001.
Yes
No