Question about Onkyo TX-SR502 Receiver

1 Answer

Amp Protection Mode

I would like to know what the hell on earth does these service station guys do that get the Onkyo 6.1 TX-SR 502 receiver out of the protection mode. I am curious as my service station folks have given me a laundary list of electronics components like a power amp, an op-amp, heat-sinks, endless numbers of resistors, capacitors and diodes.............. Pl looking for genuine advice ........folks Can something be done at our end to unlock this box????..

Posted by on

  • 3 more comments 
  • Anonymous Nov 25, 2007

    turn power on and stays on for 5 seconds and shut off.please help

  • lauren ann Dec 17, 2007

    mine comes on for a split second and shuts off. the standbye light blinks. i checked the interior all looks good. any ideas.

  • Anonymous Feb 21, 2008

    same here. my onkyo has been working beautifully for about 10 months and then'll shut off for no apparent reason and then it may or may not come back on when i hit power...this sux

  • LANCE P Mar 27, 2008

    Same here. After 2.5 years of excellent use, I just had the Geek Squad out only to connect a new blue ray and new plasma screen TV. All the audio was previously done. There is no other component plugged into the powered/switched AC outlet in the back. Now, seemingly randomly, the amp will shut off, switch to STANDBY but the standby light will blink. I can use the remote to turn it back on, but it will only stay on about 1 - 3 min., then repeat same. It doesnt feel hot, and I've always run it with the cabinet doors open and vented. I'm not sure yet if it only happens using all 6 channels or volume sensitive, or both, or neither. I havent called the Geeks back yet.

  • Anonymous Jun 23, 2008

    onkyo flashes protection mode, no way to fix the problem, I don't have any speakers hooked up and have tried, Still flashes an shuts down.



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

From LANCE P: I fixed it. Be sure that all your speaker connections are perfect. No element frays that can arc, no +/- problems, no single barely connected wire. My problem was volume sensitve and I evidently had one + wire that was loose in the back. I corrected it and ran it all day with surround and good volume with no problems. So diligently check ALL YOUR SPEAKER CONNECTIONS, both in the back of the unit and at your speakers

Posted on Mar 31, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Where is amp curcuit protection in onkyo sr

There are plenty of protect circuits in your receiver. Each chanel has one as well as dc protect and thermal protect etc etc. More than likely you have a blown channel that needs to be rebuilt.

May 17, 2012 | Onkyo TX-SR604 Receiver

1 Answer

Onkyo sr 502 turn it on today but no sound will come out. checked connections and the modes are the same as before

first doing factroy setting by hold "VIDEO1", press STBY until you see "cleared". after that, if problem stay there, then check coil L7002 on DSP board if it is open. the last reason is main CPU (Q7008) defective. this is hard one and final one

Mar 25, 2011 | Onkyo TX-SR502

1 Answer

Onkyo av amp goes to protect mode

There's a fre service manual here, you need to join tte site (free)

Onkyo TX SV727 Manual AV Control Receiver HiFi Engine

Sep 06, 2017 | Onkyo TX-SV727 Receiver

1 Answer

Onkyo ts595 goes into protect mode with volume increase

HI check your speaker cables are not touching, also make sure "b" speakers are not on and that all your speakers are 4ohm or higher as this will cause the amp to shut down if they are to low an impedeance,The amp is protecting itself when it shuts down.

hope this helps.

Aug 03, 2008 | Onkyo TX-DS575 Receiver

1 Answer

No video through HDMI section of Onkyo TX SR-805 receiver

My has problems with losing video on HDMI, component, or svideo, this is a piece of you know what!

Jul 03, 2008 | Televison & Video

1 Answer

Onkyo tx sr 605

well most dvd aint 7.1 are using dolby digital cable in digital mode ect on sterio set output on ps3 audio setting to digital

Feb 03, 2008 | Onkyo TX-SR605 Receiver

1 Answer

Onkyo tx-sr800 PROTECT mode

Hold video1 and press speakers A button, it will say "clear" If the message protect appears again, then its service time.

Aug 28, 2007 | Onkyo TX-8511 Receiver

1 Answer

Stuck in protect mode

i believe protect mode is because you have the wrong impedence speakers, they are too low (4 ohm? 6 ohm?) it chols work with 8 ohm speakers

Aug 16, 2007 | Onkyo TX-SV454 Receiver

1 Answer

Onkyo Tx-v940 Receiver/Amplifier Protection Mode

Audio amplifier IC's damaged you need to change it.Good luck

Dec 31, 2006 | Onkyo TX-V940 Receiver

1 Answer

Amp Protection Mode

no, your output transistors maybe 2 of them are gone or the small power supply that feeds the other circuitry has become defective.

Dec 13, 2006 | Onkyo TX-SR503 Receiver

Not finding what you are looking for?
Onkyo TX-SR502 Receiver Logo

Related Topics:

455 people viewed this question

Ask a Question

Usually answered in minutes!

Top Onkyo Audio Players & Recorders Experts


Level 3 Expert

5658 Answers

The Knight
The Knight

Level 3 Expert

76016 Answers


Level 3 Expert

83850 Answers

Are you an Onkyo Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides