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park griswald Posted on Aug 09, 2006
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Onkyo TX-SV434 "Protect" light

This week when we turn on the receiver, the term "Protect" replaces the FM frequency after a few seconds. We cycled the power We disconnected all patch cords/speakers We cycled power again, Still happens with nothing plugged in

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  • Master 3,130 Answers
  • Posted on Aug 09, 2006
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Joined: Mar 22, 2006
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The protect mode is a built in safety message, indicating that theres a fault somewhere with-in the unit, and it wont let the unit come on fully or more damage will occour. This unit is a solid state device, and you should not attempt to use it or open it or try any self repair as it will cause more damage. If this unit is more then a few years old , it might just be the time to start looking around at all the back to school sales on electronics, as to have this unit serviced will cost an estimate fee as well as parts and labor. If you want to invest a few bucks into this machince , then go for it, but its most likly will cost 1/2 or more then the cost of the entire unit did when it was new to have it repaired. It is up to you. Good Luck

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Onkyo switching on and off

Internal circuit fault. The set goes to protection mode. Contact the nearest authorised service center for Onkyo.
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I have a problem with my amp everytime I switch it on, it goes to protect mode. Even without connecting the speakers. What could be the problem?

hello the output transistor could have blown. this can happen if you play your receiver with high volume all the time the transistor heats up causing it to blow there are other components you can check first like any glass type fuses see if any have blown if ok check the capacitor see if any have swelled up or poped hope it helps

regards
shaun
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the system protect is usually displayed when a condition of short or shorting is occurring in the speaker wiring or the voice coil of any of your speakers.... thte circuit of you reciever is trying to protect itself and you from a very costly repair,,,so it you have another set of speakers try to use them and see if the condition still exists and if it does the problem is in the output section of the receiver,,,and if the protect no longer exists you have fixed your problem,,,good luck
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