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Denon avr-5700, speaker connector shorted to ground, power up failure unit turns off, blinking power LED.

Checked fuses

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  • 137 Answers

You have blown your output transistors this is about a 125 to 150 repair

Posted on Feb 19, 2015

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6ya6ya
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Posted on Jan 02, 2017

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  • 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

tech48
  • 624 Answers

SOURCE: 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. :)

Posted on Jun 22, 2008

tech48
  • 624 Answers

SOURCE: Denon AVR-1907 blinking red power button

It sounds like you have a bad speaker on the zone 2, or you have the speakers connected improperly.

When you engage the zone 2 a relay clicks and the speakers then become part of the amplifiers circuit.

If the problem was in the amplifier, it would go into protect mode without even having speakers connected to it.

If the speakers all check good, you most likely have the wrong type of speakers, meaning the impeadance is too low, or you have too many speakers connected to it.

On the back of the Denon, you will see right around the speaker output jacks, what ratings the speakers should be. If I remember correctly, it says 6 ohms or more when using only "A" or "B", and it says 12ohms or more for "A" + "B".

If you have two 8 ohm speakers on the same speaker jack you now have a 4 ohm load. That is below the ratings and can cause the amp to shut down (go into protect). Since your amp shuts down right away, I think you have a bad speaker or way too many speakers connected.

I have seen many times when people will connect 2 or 4 speakers to the one of the outputs that are designed for only 1 speakers.

If you are using too many speakers you will need a speaker distribution box. It has a resistor network built into it so the amp never sees a lower impeadance than what it is designed for.
You can connect 4, 6 or 8 speakers to one set of outputs designed for 2 speakers. You do loose a lot of power to the speakers, but it is better than blowing up your amplifier.

If I can be of any further help, let me know.

Posted on Jun 22, 2008

  • 119 Answers

SOURCE: AVR-600

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

Posted on Feb 26, 2009

  • 2 Answers

SOURCE: denon avr 5800

Hi I have the same receiver BUT all my lights and status indicators are on but I have no sound in any digital input modes - i plug an ipod into the CD input and I can hear Stereo, Pure Direct and Direct (it is the sweetest ounding amp i have ever heard) but nothing else works. I can pass thru to view OSD - no sound on the digital inputs - plugged DVD player in as well as a CONCAST BOX via Optical Inpiuts that were correctly configured. no sound coming out? is there a master volume muting button? i do not have the original repote as well - using Harmony remote. ideas? is this a fuse? transistors? blown amp, blown dsp? who knows.

Posted on May 19, 2009

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Starzy, to reset on a Denon AVR-1603
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http://www.avsforum.com/forum/90-receivers-amps-processors/1386123-help-denon-avr-1603-shuts-down.html
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Only red light is blinking on my denon avr 1508


It sounds like you overloaded the Denon avr with too much resistence from the speakers. Please check the total resistence of the speakers before you connect them all. Also check that the speakers or their wires are not shorted!

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Denon avr 788 power switches off by itself quickly with power standby button flashing


Could be a short on one or more of the speaker outputs. Try disconnecting all speakers and turning the unit on. If that works without a power-down then you have a short in one of the speaker connections. Re-connect them one at a time to detarmine which one it is, and then you should be able to correct the problem.

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SWITCH OFF THE UNIT..PUSH AND HOLD DOWN BOTH SPEAKER A AND SPEAKER B BUTTON WHILE HOLDING DOWN BUTTONS TURN ON MAIN POWER THE DISPLAY WILL FLASH WAIT FOR 3 FLASHES THEN RELEASE. THIS WILL RETURN EVERYTHING BACK TO RFACTORY DEFAULT

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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.

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What is the master reset code for the denon avr 1508?


Turn the unit off by main switch (not a standby button).
Press and hold "Speakers-A" and "Speakers-B" buttons and turn on main switch.
Display blinks.
Release the buttons after 3 seconds.
Receiver is reseted.

Jul 20, 2009 | Denon AVR-1508 Receiver

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Power light blinks off and on Red


* The speaker terminals are shorted -- Disconnect speakers one at a time and try again.
* Ventilation of the unit is inadequate
* Has been running at too high a volume with inadequate cooling

Go here, register and get the manual for free....

http://www.fixya.com

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Power button (light) blinks


Check your speaker cables, make sure none have shorted out. if they have, then thats why the unit won't power up. The units protector circuit is being activated upon startup.

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Denon AVR 2106 amp failure


Does it still power up for a little bit or so with no sound what so ever?....I there is no dents in it or metal pushed in causing cracked connector boards....I can take it off you hands for a couple parts I need ...because your transformer and 2 resisters are shot and it will cost almost as much as the unit cost's.

I do have a brand new never opend $649.99 Denon AVR-788 for $365.00.
And 2 used AVR units Denon and Onkyo.....ALL HDMI

call 630 742 6587

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Denon AVR-1906 Reciever is not working. Was watching a movie and then it suddenly shut off. Now, the power light is blinking red. When I try to power it on again it starts to boot up but then turns off...


speaker terminal are short circuit,switch power off connect speaker properly then switch power back.
-the ventilation holes of the set are blocked-turn power off and make good ventilation around leave the set to cool and turn power back.
-the unit is operating at continuous high power turn it of and allow for cool down and switch it back.

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