Question about Onkyo TX-SR500 Receiver

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Tx-sr500 receiver I think the negative and positive wires of a speaker wire was shorted together while the receiver was powered up. When I try to power the unit up it goes right back off like the protection circuit is activated. Can this be reset or do I most likely have component damage ?

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  • spennat92 Aug 31, 2008

    power goes on but goes right back to stand by mode..... i s there a way t reset the unit... or a fuse that can be changed?

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Hi,your fears are confirmed... the protection circuit is self resetting, and is operating because the amp will most probably have blown that channel as a result of the speaker wire short. At the risk of doing more damage(in the workshop,we always soft start an amp with output problems to prevent more damage)you could take the lid off, check and replace any blown fuses, be sure to use the same rating and type. If the problem persists, or the fuses fail again, it needs some expert attention. Off to the repair shop.... Good luck, and thanks for checking with FixYa

Posted on Feb 16, 2008

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My TX-SR500 has a problem, when I turned it on it will o less than a second and turns off it's self and the standby lithgt is blinking... Please help me on my onkyo. thank you very much!


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Sep 17, 2011 | Onkyo TX-SR500 Receiver

1 Answer

My TX-SR500 rear speakers stopped working,I tested each speaker using the channel select to optimize the rear speakers but the left and right front speakers were adjusting instead and I know I have the...


And you don't think the speakers are wired wrong. Re-investigate or reposition the speakers you THINK are Front to the Rear and go on from there.

Jul 31, 2011 | Onkyo TX-SR500 Receiver

1 Answer

Receiver goes into protect mode after fifteen seconds of pushing power button. I think a pair of speaker wires crossed.


The manual is here:

http://www.retrevo.com/s/Onkyo-TX-SV525-Receivers-review-manual/id/365bh226/t/1-2/

Power it OFF before handling any wiring.

You could verify if any speaker wires being shorted is the problem by just disconnecting all of them and trying to power it up. If it fails to power up, it's sick and needs a hands-on tech to look at it.

If you don't actually SEE the problem while disconnecting the speakers, but the receiver DOES come on, try reattaching one at a time until you either have found the offending speaker/wire combination or you have success in turning it on and using it.

Speakers can be shorted, too. So if you locate a channel giving you trouble, say, front right, you could swap a different speaker or wire set into its place to prove if it's external or internal to the receiver.

Going forward, make sure you don't run the unit too loudly and give it plenty of room for cooling ventilation.

Jan 01, 2011 | Onkyo TX-SV525 Receiver

1 Answer

Our receiver is showing "PROTECT",


Shut it off, and check the speaker connections. Look for a thin strand of wire shorting the terminals both at the rear of the receiver AND each of the speakers. Next, look for damaged speaker wires. Those run under rugs can be damaged without knowing as they're covered. Look along the entire length of the speaker wires for missing insulation and shorted conductors. Replace any wire that has damaged insulation and try again. Correct any blown speaker fuses or tripped resets (if equipped).

If the receiver still shows "protect" it will probably need to be serviced due to a failed power transistor. A damaged wire that allows a short can cause this - and typically the amplifier will go into protect mode under this condition. If allowed to persist for very long or at loud volumes, permanent damage can result. Sometimes it works one moment and then seemingly fails with this message "out of the blue". Hopefully, you'll find the problem with a wire and it will work as expected again.

Good luck!

Nov 10, 2010 | Onkyo TX-SR500 Receiver

1 Answer

Hi, after i turn the power on and then press the stand-by button, it clicks off to stand-by mode instantly. This is an Onkyo TX-SR500


This indicates that the system is going into protect mode. First disconnect all speaker wires (with the power cable disconnected). Then turn the unit on and see if it sill shuts aff ofter a few seconds. If it does not, then you have a problem with the speakers or speaker wires. inspect the wires at both ends for frayed strands that may touch. If that all lookd good, plu the speakers in, one at a time, until the problem reappears. Be sure to turn the sytem off before plugging in any speaker just to prevent any accidental short which could be catastrophic. If the system goes into protect mode with all speakers disconnected, you probably have a shorted output transistor.

Apr 05, 2010 | Onkyo TX-SR500 Receiver

1 Answer

Onkyo tx-sr500. No output to surround speakers.


Need to be diagnosed my serv tech. This could be many thing. Most Onkyo receivers have 3 year warranty.

Mar 25, 2010 | Onkyo Audio & Video Receivers

1 Answer

Every time I try to turn on my onkyo receiver it turns off instantly


the reason why the receiver probably keep turning off is that the systems come with overload protector to keep one from burning or short the systems out so it shut its self off. make sure you have the speaker wires is connected properly, its very important that you do although the receiver has 0% tolerance when it come to speakers hook up. positive from speaker to positive connector behind reciever; same as negative. double check all speakers wires. repost if that not an issue

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1 Answer

I have cambridge soundwork tower speakers and if I turn the volume up , the receiver shuts down to standby mode. Can i dissable this


It's a safety feature of your receiver. It will go into standby when you turn it up if there is speaker wires touching or a short somewhere in the speaker wire. Or could be a short in one of the drivers (tweeters, mids, bass drivers) voice coils. Firstly check to make sure there are no strands of speaker wire touching each other between positive and negative on speakers and receiver hookups, this is usually the problem

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I HAVE AN ONKYO TX SR500 AV RECEIVER WITH A 5.1 BOSE SURROUND SOUND SYSTEM WITH SONY TV. MOST RECENTLY ONLY ONE OF MY SPEAKERS IS WORKING ON MY SURROUND SOUND. ALL WIRES ARE CONNECTED. I CHECKED ALL...


The symptom you described can be caused by any number of things. I always start with the output power transistors which are the first things to blow with a speaker output overload condition. Unplug the power cord to your unit, remove the top cover and use an ohmmeter to check resistance from C to E on all 10 of the power transistors (Q6050 thru 54 and Q6060 thru 64) attached to the large heat sink. Blown transistors typically read <1 ohm, compared to good transistors that are >10k ohms. If you find a bad transistor it will need to be replaced.

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