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Onkyo TX-SV828THX Protect message

Hooked up some speakers after not using for a while and when I turn unit on after a few seconds the display reads PROTECT. I did find a speaker wire that shorted, corrected, unplugged and replugged everything hoping to reset, but same condition. I only see 3 fuses in the box and they look fine. The users manual says to contact service center, but given the age of the box and can't find a local place to work on, hoping someone can help me here. It's a great unit, but I don't want to spend a lot given the age and just using at this stage to drive some in house speakers.

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  • Theobaas Mar 15, 2009

    Hooked up some speakers after not using for a while and when I turn unit on after a few seconds the display reads PROTECT. I did find a speaker wire that shorted, corrected, unplugged and replugged everything hoping to reset, but same condition. I only see 3 fuses in the box and they look fine. The users manual says to contact service center, but given the age of the box and can't find a local place to work on, hoping someone can help me here. It's a great unit, but I don't want to spend a lot given the age and just using at this stage to drive some in house speakers.



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Audio amplifier IC damaged need to be replaced

Posted on Aug 31, 2009

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Hi,,My onkyo tx-sv828thx problem was it shows "protect" sometimes.then after 2 to 3 second its back to normal operation. What do you think the problem?can i do it by myself? anyway,i am using...


The protect message appears when the current powering an amplifier inside the receiver goes beyond the safety limit or the amplifiers overheat. So just check the wiring and the speakers impedance with an ohmmeter - each should be above 6 ohms
If they are lower then you have a short in one of the actual drivers of the Bose 901 speaker . If the impedance is OK then the Onkyo overheats, place it in a better position to increase the airflow thru it.

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Just check your speaker cabling again. Make sure that all of them are seated properly, none is touching each other or the body of receiver. Rewire if necessary..
Are you using banana plugs for connecting speaker or just directly. Some times even a little tiny wire touching the receiver could trigger the protect mode. Be careful, since protect mode is sometimes not fast enough and it could blown a few trasistors in the power circuit.

Otherwise, do your bose speakers play out load on other systems?

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