Question about Denon AVR-900 Receiver

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Protect sign is on a avr 900

Every time i turn on the unit it goes through the start up thing then stops and says protect tried unplugging it no luck how do you reset tht help

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Re: protect sign is on a avr 900

I have simillar problem. Can you remember what was the last thing you did with it before the problem come

Posted on Jul 20, 2009

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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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My Harmon Kardon AVR 2600 goes to protect mode when powered up. After many tries it will fire up but at times it's up to twenty times. I did load the software upgrade 6 months and it has been fine

Check all speaker wiring for shorts, if okay! there is a problem in the audio output stage of the unit or the protection circuit is not working properly. I would suggest a pro to evaluate.

Apr 02, 2012 | Harman Kardon AVR 2600

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How do i get the thing to not say protect

try factory reset by unplugging unit then hold down tuner button and video select buttons then plug in unit let display flash a couple times then release,if unit goes back to protect,you have a shorted power amp problems.

Apr 13, 2010 | Denon AVR-900 Receiver

1 Answer

While watching tv my speakers started cracking and went loud then just stop working. turn the unit off then back on it works for a few seconds then does the same thing.Denon AVR 1908

I had the same issue..I called Denon support and they fixed the problem. You need to reboot the micro-processor....turn off the unit...hold down A+B then turn on...the display blinks (all the display is illuminated) Let go of the buttons.....issue resolved!

Good luck....

Jan 08, 2010 | Denon AVR-1908

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AVR amber light will not return to blue after

There is an internal reset switch mounted on the transformer board. Open the unit, look at the boards attached to the transformer, the pushbutton is facing up. Measure the voltage on the 2 pins of the switch. If it is a logic low, the switch is partially shorted. Replace the switch or just cut the jumper wire just below thw switch. When this switch fails, it constantly resets the receiver and stops it from powering up. It does not fix a protection mode problem.

Dec 01, 2009 | Harman Kardon AVR 130 Receiver

1 Answer

While watching tv my speakers started cracking and went loud then just stop working. turn the unit off then back on it works for a few seconds then does the same thing.

One of two issues....the unit may be can install a simple fan (plug into the accessory outlet on the back) this way it will turn on whenever the unit comes on.

Second potential issue/resolutoin......reboot the micro-processor....turn off unit....hold down A+B at the same time....power up unit..(all buttons on display illuminate and blink)....hold for roughly 3 seconds then let go...

Let me konow how it goes....

Aug 15, 2009 | Denon AVR-1908

1 Answer

Protect is ON

Either there is a bad capacitor in the protection unit or you can find the wire that goes from volume control to protection unit and unplug it.
You can also try turning the volume all the way off before turning on, then slowly turn up from there

Jul 20, 2009 | Denon AVR-900 Receiver

1 Answer

Denon avr 2803

The unit is in protect mode. This effectively shuts off the output amplifier section. This happens because a problme is detected in the output section. This unit will require service. Most likely the output transistors have failed. Figure on $20-$40 for parts plus the local labor rate for repair cost.

May 12, 2008 | Audio & Video Receivers

1 Answer

Says protect

Probably some speaker wires got shorted or the output stages freaked out and the cpu went into protect mode. Normally plugging it out of and in to the wall socket should/could reset it.

First check all wiring at the speaker outputs and on the speakers
then if it still wont startup you could try the avr-1500 method with
some trial and error pressing of buttons.

avr-1500 reset method:
Unplug the unit from the wall, hold down both video select and audio select at the same time, plug it back in. Keep holding both buttons for 2 secs, unit will reboot. As you have no audio select button on your avr-1100 you might try pressing video select and another key to see if this will reboot it.

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Trouble shooting a Denon Reciever

I just picked up a non working AVR 900, there are a total of 4 fuses inside the unit: 2 on the protect board, 6.3A and 8A, and 2 in the middle near the front. I was told by Denon the following might reset the microprocessor. 1) unplug unit 2) press and hold tuner and video select on front panel 3) plug in while holding buttons Unit display should flash until you let go of buttons. Unit stays on you should be ok/ goes back to red- service They also said: There are 3 types of protection that will commonly occur with our receivers. This is designed to protect the unit from permanent damage. 1) Thermal Protect = When the unit overheats this will occur, usually if there is not enough air space above and around the unit. There cannot be anything directly on top of the unit and there must be at least 4 inches of airspace above the unit. 2) Overload Protect = Most commonly occurs when a strand or more of copper speaker wire is not securely connected to the speaker terminal and is touching the chassis of the receiver. If the volume is turned higher than 85% this may also occur. If you need to turn the volume higher than this point to get the level you want, you need a more powerful amp. 3) DC Protect = When an amplifier fails this will occur. This will protect dc current from damaging the speakers. When this happens the unit will need to be serviced. I had a bad 6.3A fuse ? I replaced it and tried to reset. The microprocessor would not reset. I had the exact same results you had. The chip on the back side of the front IC board was smoking. Before I attempted the reset I asked Denon if it was worth sending in for repair. The answer was "NO" BC

Apr 20, 2007 | Denon AVR-900 Receiver

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