Question about Onkyo HTR500 Receiver

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Onkyo ht-r500 no speakers attached goes directly into protect mode, standby light blinking..

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I have a HT-R520 - First thing stated in the manual is 'Do Not Apply Power to the System Until All the Speakers Are Connected to the Receiver.' This practice avoids any hot connects to the speakers. As with any high-outpiut system connecting spreaker wires to the system while in operation can spike the speakers as well as the amplifier curcuits. Hook up your speakers first and give it a try. Good Luck!

Posted on Aug 20, 2009

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Posted on Jan 02, 2017

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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 and reconnect an input and a pair of speaker wires onto the unit. If the receiver still does not turn on than you will have to bring it in for service. Turn up the volume and if the receiver doesn't shut down, power off the receiver and add another pair of speakers. Power up the unit again and turn up the volume. If it doesn't shut down, power off the unit again. Now connect all your input sources and turn on your receiver. If the unit shuts down again, your unit will need to be further serviced at an authorized Onkyo service center.

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1 Answer

I have an Onkyo AV Receiver HT-R500 and when I turn it on, it turns on and in less than one second it turns back to standby. What could be wrong?.


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1 Answer

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Activated protection circuitry means that the amplifier is seeing conditions it does not like and is shutting down the power to prevent further damage.
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Disconnect both speakers and turn on the amplifier. Does it still give the error message? If it does, your amp is blown. If it does not, carefully inspect your speaker wires and their connection. Make sure all looks good and reconnect the speakers and try it again. Still get the error message? You likely have a problem in your speaker cabinet(s).

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