Question about Denon AVR-2500 Receiver

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My protection light keeps turning on when my speakers try to start up

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  • tmharry501 Dec 03, 2008

    my protection light remains on and basically the receiver is useless until i can remove the protction mode.

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Posted on Jun 24, 2008

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  • Denon Master
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Your audio amplifiers IC's are damaged you gotta send your device to a repair center.Good luck.

Posted on Jun 02, 2008

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1 Answer

It keeps blinking protetor


The protector circuit protects your amplifier from shorted speakers . One of your speakers , or more speakers are shorted out . To figure it out easily follow these instructions . Turn the unit off . Now unplug all of the speaker wire connections from the back of the unit . Turn the unit on . Make sure the volume is turned all the way down . The protector light should not light up . If it does , the problem is inside the unit itself and we'll have to be repaired at the shop . If the protector light is off than continue on as follows . Connect the speakers one at a time to the unit . Each time you connect a speaker , turn the volume control up and back down making sure the protector light does not come on . When you connect the bad speaker , the protection light should come on . Whichever speaker makes the lights come on when connected is the bad speaker and should be replaced .

Oct 21, 2010 | Sony STR-DA2ES 6.1 Channels Receiver

2 Answers

Red light is on and subs won't play all the wires are connected correctly it all of a sudden just stopped working one day idk y


sounds like the amp is in protection mode. try disconnecting the subs and see it the light changes to green. if it does then the subs are your problem. if the light was allways red while it was working then the subs may be disconnected inside the box or have gone bad. try using a diffrent speaker and connect to the amp.

Feb 06, 2010 | Audiovox Car Audio & Video

1 Answer

Protection light keeps flashing on and off


try hooking up only the power ground and remote see what happens if protection light is on then u have a problem with amp if it goes off then hook up rca if still off then hook up speaker wire if it turns on then u have a prob with speakers

Feb 02, 2010 | Kicker ZX10001 Car Audio Amplifier

1 Answer

My stereo keeps saying ''protect''. how can i fix it? ive tried to unplug it for 4 hours and it still dont work


Check the speaker wire connections and make sure that none of them are crossed. Shorted wires will cause the reciever to turn on the protect mode to keep the amplifier from shorting out. Try disconnecting the speaker wires from the reciever. if you turn it on and it still says "protect" then the short is possibly in the reciever itself.

Nov 08, 2009 | Cars & Trucks

1 Answer

Xm-2002gtr amp keeps kicking protect light on


check your amp and speakers and make sure their both hooked up 4 ohm instead of 2 ohm because if you have 1 set of voice coils on your speakers they can only be hooked up four ohm and not bridged to your amp because if you keep trying this you will lock up your speakers if the speakers are only 4 ohm than just hook them up regular to each channel on your amp if your trying to brigde four ohm speakers to your amp it will keep going into protect or worst case scenario you will fry your speakers and you can check your ohm with a ohmmeter trust me my brother owns a stereo shop

Oct 19, 2009 | Sony Car Audio & Video

1 Answer

Flashing protect


the protector comes on to keep the amp from further damaging itself or the speakers. The buzz you heard was probably 60HZ line buzz from the main DC supply conducting full current through one of your speakers through a damaged amplifier transistor. Your stereo will need professional repair. The protect circuit basically opens the speaker relay (and sometimes shuts down the unit) to prevent this DC voltage and current from getting to your speakers until the problem is corrected.

Jun 17, 2009 | Onkyo TX-SV727 Receiver

1 Answer

When I switch on my Kenwood A-722L all the lights start flashing and 'PROTECT' appears on the display. Any ideas?


You have an amp failure, this can be a problem with a speaker but is more often a shorted output channel.

You can check to see if it is a speaker by disconnecting the speakers and then turn it on. If it goes into protect again, you have a shorted output channel. If it turns on, you may have a bad speaker.

If it turns on, try connecting one speaker at a time until it goes back into protect. When it goes into protect, you just found your bad speaker (last one connected).

Make sure you turn it off before connecting a speaker. Then turn it back on again. Do this for every speaker you have.

If it stays in protect, you should take it in for service. Unless you have the proper tools and experience working on electronics there is nothing you can do to repair this yourself. I have seen many people try who were not qualified to work on electronics, and more often than not, they cause more damage than they started with which results in a more costly repair.

Let me know if you need any more help.

Dave

Jul 02, 2008 | Kenwood Audio Players & Recorders

1 Answer

Denon AVR-3802


I have repaired many of these Denon receivers over the last few years.

Since the headphones work, that means if you dis-connect the speakers it will turn on and not go into protect (when power cuts off a few seconds after turning the unit on).

The most likely problem is a bad speaker. to find out which speaker is causing the problem, do this.

Start out with just one speaker connected and then turn on the unit. If it turns on and plays music, you know that speaker is good.
Now turn the unit off again and add another speaker and keep the first speaker connected. Once again, if the unit plays, that speaker is also good.

Keep doing this same procedure one speaker at a time. As soon as you connect a speaker and then try to turn on the unit and it goes into protect, the speaker you just connected is bad.

To confirm that this speaker is the bad speaker, dis-connect all speakers and only plug the suspected bad speaker into a speaker jack that worked with one of the other speakers.
If the unit still goes into protect you know then that you have found the bad speaker.

If the unit still goes into protect, that speaker is bad and you will need to take it in for repair or replace it.
make sure you use 8 ohm speakers. if i remember correctly these Denons can use 6 ohm speakers, but those are harder to find and most home speakers are 8 ohms.

If the unit does not go into protect and that suspected bad speaker plays in one of the other speaker jacks, what you really have is a bad channel in the amplifier, the channel that the suspected bad speaker was previously connected to.

If you find out you have a bad channel, you will need to take it in to an repair center. Preferably an authorized Denon service center. There are not very many of those around. I work at the only authorized Denon service center in the entire state of Michigan.

If I can be of more assistance, don't hesitate to ask. And a good rating is always appreciated. :)

Jun 22, 2008 | Denon AVR-3802 Receiver

1 Answer

Protection light and nothing. ??


How about the speaker itself? This problem can be caused by a blown or defective speaker. If you disconnect the speaker wires from the amp, do you still get the protect light?

Mar 15, 2007 | Clarion APX401.2 Car Audio Amplifier

2 Answers

Diagnostic light


Best thing to do is disconnect all the speakers with no input on the amp turn it on and if its still in protection seek help in the repair of said amp at http://performanceteknique.com.. If the protection light goes out then start to put back on each speaker with no volume and the unit off. if you get to a speaker that makes the unit go into protect then leave on that speaker and disconnect all the rest .. If the protect remains then something with that speaker or wiring is bad BUT if after disconnecting the rest of the speakers that you hooked up then theres is still a power issue with your amp

Apr 05, 2006 | Performance Teknique ICBM-782 Car Audio...

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