Question about Onkyo A-9555 2-Channel Amplifier

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I have Onkyo AV Receiver - HTS-3100 and what is happening is the Amplifier is tripping automatically in the night at 9.00 pm. It is working in the morning without any issues. I have removed all speaker wires also and still the amplfier trips. What could be the issue ? Is there a voltage redduction in my house at night time due to which it trips off ?

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I agree that there's something enviromental to this but I'd think you would see lights dimming around the house at the same time if it was a brown-out.

Is there anything on a timer that switches on at 9:00 PM? What would happen if you moved the power to a different source? That may help isolate the circuit that's straining.

Also make sure you're NOT sourcing heavy-power-using accessories from the convenience outlets on the receiver.

Posted on Apr 11, 2011

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Posted on Jan 02, 2017

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Somewhere in here is the answer.


"The AV receiver turns off as soon as it’s turned
on
• The amp protection circuit has been activated.
Remove the power cord from the wall outlet immediately.
Disconnect all speaker cables and input sources,
and leave the AV receiver with its power cord disconnected
for 1 hour. After that, reconnect the power cord
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That last sentence is misleading. I don't think they actually want you to play an active signal at MAXimum as a test. I think they mean with all sources attached and an idle one selected, like CD, crank the volume knob. If the amp is not in Protection mode you should always be able to detect some hiss up close.

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Unless the receiver manual or the sticker near the 'speaker connetor' specifies a range or another value, you should assume 8 Ohms. Your speakers should say on the back of them.

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You user manual should detail this.

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