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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Re: Onkyo receiver problems

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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Re: Onkyo receiver problems

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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Hi Ram,

We would like to assist you. Please follow this link an supply the requested information to verify that your unit qualifies: .

If your unit qualifies, a box and prepaid shipping label will be sent out. Please note that as part of the repair process, the firmware will be upgraded and all user settings will be reset to factory defaults. The average time for repair is 7-10 business days after the unit arrives at the service center.


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Hi, going thru the forum I found your post. If this has not been resolved please follow these instructions.

We would like to assist you. Please follow this link an supply the requested information to verify that your unit qualifies: .

If your unit qualifies, a box and prepaid shipping label will be sent out. Please note that as part of the repair process, the firmware will be upgraded and all user settings will be reset to factory defaults. The average time for repair is 7-10 business days after the unit arrives at the service center, Thanks, JT

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Hello, i have a problem with my Onkyo receiver. Every time i put it out, it has lost all his institutions. I don't know why this is happens. Every time i have to install the whole receiver again. Do you...

It will help diagnose problem if you provide the model no. of the Onkyo receiver.

Normally the settings are stored in a flash memory device (EEPROM). It is possible this is failing.

Have you recently updated the firmware of the unit? If you know how to run to reset the receiver then try it and see if holds the settings after that.

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I’m writing this report to provide insight into a common Okyo issue. When my Onkyo receiver began to malfunction my first response was to search the web for answers. What I fond was conflicting information. While all system issue may be unique, I hope this report shed some light on the subject.

System Breakdown:
Receiver: Onkyo TX-SR606 7.1 Channel Home Theater Receiver (Black) TV: Samsung - LN52A750 - 52" LCD TV - 1080p
Broadcast: Comcast
Component 1: XBOX 360 Elite
Component 2: PS3 120GB
Cables: Mediabridge Ultra Series - 10ft High Speed HDMI Cable - Version 1.3 Category 2 - 1080p - Blu-Ray - PS3 - W/ Nylon Sleeve

When I first setup my Onkyo receiver it worked perfectly. Over time, my TV would display “Searching for Signal”. After about a few minutes the receiver would detect the XBOX 360 and work fine. At first it was no big deal until the problem progressed. The receiver began to take longer and longer to detect the signal from the XBOX 360. Finally it would take up to 30 minutes or would not detect a signal at all.

Finally I went through the process of changing out the HDMI cables and switching ports. This did not work, so I call Onkyo. They walked me through a reset process that did not work. Finally they recommended that I take it to an approved Onkyo repair shop. Lucky for me there is a repair shop in the suburbs of Chicago about an hours drive from my location. There are not many approved Onkyo repair shops. Most people would have to ship their receiver to another state.

I took the receiver to the repair shop. They seem to have a nice little scam going on… Here is the scam.. They tell you there is a 3 to 4 week wait time (or longer) until they can even look at your receiver! BUT, if you want to put it on the “Priority List” you can pay a $30 non refundable fee not covered by your warranty. Then you would only have to wait about a week. Tell me, who would not op for the priority list when your entire entertainment system is managed by the receiver?!?!? So I payed the $30. About 4 days later I get a call from the repairman. He says, all the HDMI ports work but they don’t have an XBOX 360 to hook it up to. So he can’t validate the problem. After arguing with him for an hour and listening to him cry about how crapy Onkyo receivers are and how hard the company is to work with, he agreed to do some research into the problem. I told him many times, simply look on the internet many people are having the same problem. Onkyo has to know something about this.

Finally about a week later I get a call from the repair guy. He says he thinks he knows what the problem is. He has to order some capacitors and I could pay $45 for priority shipping. Umm wait one minute, I already paid $30 for priority service now you want me to pay more for shipping? No thank you! Over time I simply rewired my system to work without the receiver and to tell you the truth I almost forgot about the receiver. Finally I got a call from the repair shop about 2 months later saying I could come pick up my receiver. I talked to the repairman. He said the following…

There are 4 capacitors that malfunction over time. It’s a common problem with Onkyo receivers. When the capacitors begin to malfunction you get intermittent signal response until it does not work.

He could not explain why the cable still worked (everything was hooked up with HDMI cables).

If you are experiencing this problem. I hope this helps save some time switching out cables and guessing why your system is not working.

- Antious

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Again, onkyo has downloadable cd software (its free) that you run threw cd player via fiber optics that will fix the issue.,choose region,click support at the bottom of page find Download Center or
Software Downloads/Updates: for info. With onkyo its usually a simple chip issue. If that fails , find contact support , e-mail them your issue and simply ask for a downloadable repair disc- I did.

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Onkyo receivers are very good quality and are normally worth getting repaired. If it were junk I would tell you to just buy a new one. But even the very best equipment can fail. I have been repairing audio equipment for nearly 18 years and have never seen any brand that did not have some type of failures at some time or another. Onkyo's may not be the most expensive receivers, but they are some of the best engineered receivers I have worked on.

I hope this helps you decide what you are going to do, and hopefully after the micro is reset, it will work good again.

Let me know if you need any more help.


Jul 18, 2008 | Onkyo Audio & Video Receivers

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