Question about Onkyo TX-SR503 Receiver

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Onkyo receiver problems

I have an Onkyo TXSR503 receiver. I have sent it in for repair three times, for basically the same issue. It has failed again in the same way. The protection circuit turns the receiver off after a few seconds. I have no doubt that if I send it in again for repair, it will fail once more. Not only did the repair not hold, they didn't even fix all of the problems. The last time it was returned , two of the channels, the surround back, left and right did not work. No doubt they will try and blame this on me, a little hard to accept as these channels had not been connected before they failed. I don't think Onkyo will do anything about this other than having it "serviced" again. Then when it fails this time, the warranty will be expired and I'll end up buying a new receiver, not an Onkyo by any means. Other than letting as many people as possible know what a POS Onkyo sold me, and how bad their service centers are, I don't know what to do.

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  • Mrunow Oct 17, 2007

    I've tried all that stuff.  At this point I'm convinced that if I send it in for repair, it won't do any good.  They sold me an expensive paperweight.

  • duxburydutch Nov 17, 2007

    Same problem. Maybe after turning the receiver on more than 20 times and moving volume up or down, the unnit will stay on. I've tried to fix the problem myself following the instructions in the manual. (As if ONKYO already knew about the problem.) Brought it to authorized service center in Providence, RI. Had to wait a few weeks and was treated as if I was dumb. Checked all wires and speakers for shorts with multimeter. All were fine. The thing even turns off when nothing is connected. Called NJ main service number. Got a somewhat condescending answer. I can ship my unit (!). I expect less of a hassle when there seems to be a serious system fault. The unit was fine for a few months. Once it stays on, the sound is good though.

  • Anonymous Nov 18, 2007

    Same problem. I get about 20 seconds before it shuts down.

  • Anonymous Nov 21, 2007

    Same problem. Mine has been "repaired" four times under warranty. Had my speakers checked, thought it was the center channel, unit shut off with no center channel hooked up. Advice I got was to get a different receiver.

  • pammo13 Jan 21, 2009

    rearanging speakers and speakers wires touched and then the protect came on.

    Same bull Sh-t with mine. No help from Onkyo either. I hope Onkyo goes **** up and they all loss their jobs



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All speakers and lines OK?  Sorry for basic approach!!  Protection is supposed to work when speaker outputs are loaded under recommended Z. speaker Z is a setting too ... along with several other paramenters.  Also, re the "last return" ...  Maybe the back surround speakers were turned off in settings?  Again, apologies if you've tried all this basic stuff.  I've just bought one of these amps and have probs with the FM tuner not tuning anything.  Mmmm. Back to the shop??   Cheers, Chris

Posted on Oct 17, 2007

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I bought my 503 in 2005 and after two years it started doing the same thing. the amp protection relay kicks on, if I hit hte power button about 10 to 15 times it will stay on and work fine untill the next time I turn the system on. I did all the steps that Onkyo shows. un plug everything and turn it on. it didnt make a difference. there are 4 relays on the PCB board, one is enicial power on, one of them is the amp protection relay, not sure which one tho. Onkyo doesnt seem to know anything either.

Posted on May 08, 2010


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