Question about Denon AVR 2808Ci Receiver

1 Answer

I mistakenly gave 220volts to my DENON 2808CI. There was a burning smell and denon is no powering up. What must have burned? i opend th etop lid and checked eveyrthing is fine except th epower transformer was little heated but i was using it for 2 hours on 110v may be hti scould be the reason for it being hot. I checked the fuses on electricty borad, an fueses on circutie boards. alll are intact. Power setich is not lighting up and denon stopped working. Kindly advise what to check. thanks a ton.

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  • Denon Master
  • 42,683 Answers

Fuses only fail from excessive current and not wrong voltage
take it in for a proper diagnosis but with twice the required voltage , the results will be --junk it and next time used the correct adaptor for the voltage

Posted on May 25, 2017

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Posted on Jan 02, 2017

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SOURCE: 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

Posted on Apr 24, 2007

  • 54 Answers

SOURCE: Denon AVR-1601

This is a very common problem with denon receivers of the 2001-2-3 vintage. On almost every one, there are 4 little "surge" resistors in the power supply. These werent quite robust enough from the factory and one day would just burn open for no reason. Well, actually there is a reason, the "surge" that happens every time you power the unit up eventually weakens the resistors and then they pop. You need to take this to a denon service shop as I GUARANTEE they have seen this before. They need to check resistors in the picture, locarde above the **** rectangular connector. Resistors numbers R141, 142, 148, 149: 75f69d7.jpg These resistors when measured, should be less than 10 ohms each. If they are more, then they are blown. If they are blown, then have the shop check the channels for blown output transistors. If the outputs are OK, then these resistors should be replaced with 1 ohm 1/2 watt metal -film flameproof resistors. You might need to be prepared for a large bill, because the entire unit must come apart to replace the resistors, however, just checking them takes only about 10 minutes... Good luck and don't try this at home. Rob

Posted on Apr 08, 2008

  • 5 Answers

SOURCE: DENON AVR 2802 (NO SOUND)

If "Digital" sign blink on front panel, it means DSP do no start properly. If DSP do not start, main UC mute audio. Change IC, AT49LV002-70TC (IC 817 ) at DSP board (Denon P/N: 262 3010 006).



Posted on Sep 11, 2008

  • 4234 Answers

SOURCE: denon avr-2106 getting hot shutting down

Normally when this happens it is because the impedence load is too small. This unit requires 8 Ohm speakers. If you connect 4 Ohm speakers, it will work, but work harder and generate excessive heat. If the heat is too much, the unit will enter protect mode and shut down. Once it cools off, it will work again. In your case, if the speakers are the correct impedence, check for crossed wires. If that is the problem, running the unit at higher volume levels should cause it to shutdown sooner.

Keep us posted,
Dan

Posted on Mar 10, 2009

  • 1 Answer

SOURCE: Denon AVR-1602 Overheated!

I have exactly the same problem. I have checked and replaced these resistors but they didn't fix the problem nor were the old ones open circuited anyway, but I have kept with the new ones for now. I have also checked some of the transistors on the larger heat sink and the power regulator transistors on the two small heat sinks, no problem there either.
I guess the next step is the check the power supply and power relay after that I stumped.
Anyone else got anymore ideas?

Posted on Sep 12, 2012

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How to change fuses on denon 2808ci played it loud


Sorry to read about your problem, I hope this helps you out.

you will need to take off the covers, and replace the pop out fuse's

Look around, where the power wires come in.. they look like clear class with metal on each end or white cerramic..

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

Dec 23, 2010 | Denon AVR 2808Ci Receiver

1 Answer

Moved receiver ... smelled like burning rubber ... now only red flashing light comes on and it doesn't turn on completely. Did it blow a fuse? Can it be repaired?


sounds like something shorted it out yes it cn be repaired you might be able to find another unit on ebay for the same price it would cost to fix it

Dec 05, 2009 | Denon AVR 2808Ci Receiver

1 Answer

I have a denon avr amp it powers up then goes in


disconnect all connections cycle power if the power stays on reconnect equipment one at a time cycling power after each peice reconnected. If the power goes back to stand by with nothing connected the reciever needs repair

Jul 18, 2009 | Denon AVR 2808Ci Receiver

1 Answer

When I turn on my receiver, it automatically turns off and the power button flashes red. Prior to shut down, the receiver display notes "Tuner Ext. In" What's the problem? It has worked p


Protection circuit turns off the unit because of critical conditions- wrong power supply voltages or one of the power amplifier channels is bad. First, visual inspect the power amp board near the heat sink for burned resistors, test outputs for a short. If there are no problem you may try to turn the unit on and you have several second before it shuts down to check power supply voltages and power amp output voltages and bias, then ... Long story you'd better take it to a repair shop or repair at ebcelectronics.com

May 09, 2009 | Denon AVR 2808Ci Receiver

1 Answer

Protection circuit momentary activation. Not heat/speaker problem


Is it possible for you to lower the source level? if yes go ahead...

There is an automatic Dialogue normalisation function in Denon which is activated to reduce overly bright input signals. ( most movies have wide variation in sound levels and therefore this function is avaialble). (see page45 of your user manual).

When your system worked fine with the AVR 2808CI, then why is it giving problem with AVR 3808CI....???? You must ask Denon.

Protection circuits are activated when:
1). There is rise of internal temperature.
2).Core wires of the speakers are touching each other or a core wire is sticking out of the terminal and touching the set's rear panel or the speaker itself has a problem.
3). Speakers with an impedance other than specified are being used.
or
4). the set is damamged or has bad solder / dry solder connection .

If your AVR is new, please do not accept, the set could be faulty. The protection circuits should not be activated unless any of the above happen.

You must know, at times the protection circuits are not fast enough and it could burn some of the transistors on the power output circuit. With time, the solders on the circuit board could give way and give you problems later on.

You must sort out with Denon if the AVR is under warranty.

Best of Luck.

Mar 11, 2009 | Denon AVR 3808Ci Receiver

1 Answer

Subwoofer Connection Problem


why don't you both return these units and call Denon for replacements without these problems?  Sqeaky hinges get the oil.

Nov 12, 2008 | Denon AVR 2808Ci Receiver

2 Answers

Help required for dumbo on Amps Denon AVR 2808CI


Your unit was probably damaged in shipping. Denon is a nice unit! Do you hear any clicks when you hit the power button??? You should hear two relay clicks. You should hear the power relay click at power on and 3 to 5 seconds later you should hear the speaker protection relay click if your audio amp section is ok. If you hear both relays click then your display circuit is at fault. Open the unit and look for breaks on the front pcb (behind the display) and on the main board in the power section ( where the fuses are ).
Good Luck!

barneyluc

Oct 10, 2008 | Denon AVR 2808Ci Receiver

1 Answer

Denon 1508- no sound but smoke.


perhaps u might consider going to a(n) (unauthorised) repair centre. just check with folks around u or maybe audio forums within your area. authorised agent doesn't always mean the best. i suspect they may have used reconditioned components.

Aug 31, 2008 | Denon AVR-1508 Receiver

3 Answers

DENON AVR 2802 (NO SOUND)


If "Digital" sign blink on front panel, it means DSP do no start properly. If DSP do not start, main UC mute audio. Change IC, AT49LV002-70TC (IC 817 ) at DSP board (Denon P/N: 262 3010 006).



Jan 01, 2007 | Denon AVR-2802

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