Sansui AU_417 amplifier - Power/protector problem

[edward_allen]

I've been given an Sansui AU-417 integrated amplifier to service which appears to have a problem with the power protector circuit.

When powered on, the Power/Protector LED flashes and the speakers remain disconnected.

Can anyone suggest the most likely cause? And a fix if possible.

As yet, I don't have a service manual.
If anyone does, I'd much appreciate a copy.

Best wishes
Edward

[jts1957]

Is there any DC voltage on the input pins of relay (from output of either amplifier)?
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[edward_allen]

I'm getting about -15V on the LEFT channel Input pin but zero on the RIGHT channel Input pin

Any ideas?

Cheers
Edward

[jts1957]

Some component bad in left channel.
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