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Denon AVR 800 went into "Protect" now "Standby" light just flashs

I have a Denon AVR800 receiver that one day it would not turn on, it just would say "Protect" I checked all the speaker connections and they were fine. I left it alone for some time now and now I turned it on and something clicks inside (like it use to) but now the "Standby" light just flashes. Any help would be greatly appreciated.

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4 Suggested Answers

simplemitch
  • 752 Answers

SOURCE: Denon AVR-4800 5.1Channel Standby light blinking

It's going into protect. Unhook ALL the speakers and see if it still shuts itself off. If so, then it will have to be taken in for service.

Posted on Oct 27, 2007

  • 6 Answers

SOURCE: Denon AVR-1508

sounds like overload protection
turn the volume all the way down, then turn it on
if that doesn't do it you may have a short in one of the speaker lines - try disconnecting them one at a time

Posted on Jan 13, 2008

  • 4234 Answers

SOURCE: Denon AVR-1508 Receiver problems - cuts off and goes into protect mode

Usually when the unit runs for a while before shutting down there are two possibilities:

1) There is a small amount of DC current present that effectively heats up the speaker coils enough to cause a temporary short circuit that kicks in the protect circuit.
2) The output transistors or bias transistors are sensitive to heat and breaking down again causing the protect circuit to kick in.

A few experiments to try:

1) Does the time to shutdown change depending upon the volume level?
2) Is there any background noise coming from the speakers? Listen to a blank tape for example. Is there a hum or any other noise that you would not normally expect?
3) If you have a DC voltmeter, check for any voltage between the speaker lines.

Update this and we'll try to narrow this down.

Dan

Posted on Aug 19, 2008

  • 5 Answers

SOURCE: Denon AVR older receiver but worked fine; now

Did you try to reset the unit? Resetting the unit has fixed every problem I have ever had......turn off unit.....hold down A+B at the same time then turn the unit back on...hold buttons for roughly 3 seconds....Let me know if it works.

Posted on Mar 09, 2010

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It only goes into protect mode usually when there are to manny speakers hooked up more then its can handle

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If you used it for only 3-4 hours before the problem occurred then you should have a replacement warranty on the product.
I think you have already done the factory reset procedure shown on page 175 of the user manual.
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http://assets.denon.com/DocumentMaster/us/Owners%20Manual%20-%20English_AVR-X1000.pdf


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How do I adjust the surround sound without the remote?


I was able to find a manual for this receiver at this URL...

http://www.devicemanuals.com/productsupport/Denon_AVR-800_manual.html

Its a free download. I did a search through the file and there is a way to do this. Apparently, the remote for the AVR800 doesn't allow you to adjust the rear speakers anyway, so no problem about no remote.
Hope this helps...post an update if it does or not and I'll keep searching for an answer if not.

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Speakers made popping sound and now receiver is in protection mode


It sounds like you have some wires that are touching cause the reciever to protect itself. Go over and check all wiring and make sure you have nothing touching. Unplug device while you are doing this and then when done plug back up and see if that fixed issue.

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The sytems says protect


If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
Check all the connections at the back of the amp to ensure they are not shorting, and at the back of each speaker, if nothing is found there, check each wire for damage (like squashed or rodent damage).

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The receiver turns on and immediately goes to standby


The unit is going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

Nov 18, 2009 | Denon AVR-5700 Receiver

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After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

Nov 16, 2009 | Denon AVR-485 Receiver

1 Answer

My Denon is in Protect mode, what can I do to change this back to normal mode. I do not have the remote control either?


First, disconnect all speaker wires at the receiver and turn it back on. If it stays on, your receiver is ok and you need to check each wire and each speaker by re-connecting them one by one and re powering the receiver. You will either fix the problem or find the problem by doing this. It's either a bad speaker or a wire is shorted in line or at the receiver or speaker. It's the most common problem of all. If your receiver still shuts down, it needs to be serviced. Hope this helps

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AVR-600


The problem is past that point once the protect continues to activate the amp is in need of service

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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

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