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Denon AVR-5700 power problem

#1
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4/30/06 at 11:06pm
  • Joined: January 2001
  • Post Count: 6
My denon receiver has been great ever since I first purchased it on amazon years ago....but a few weeks ago it started to act funny and bad.

I was watching a dvd at about -15 to -20, then all of a sudden the receiver just shut off and red light started blinking, I had to go and press the power switch and turn it off then on to go back on again, but it would come on for a split second then repeat the same process of shutting down. It seems like an amp problem to my speakers because if I have the volume to OFF it won't switch off on me, i can pass through audio from multi-out to my tv and video with volume OFF perfectly still, but if i raise the volume higher than -40 it starts turning off, wtf? I can't play anything loud anymore, -40 is not loud. What's wrong with my receiver? Did it blow a fuse?

...

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#2
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5/1/06 at 1:41pm
  • Joined: August 1999
  • Location: Katy, TX
  • Post Count: 5,823

Re: Denon AVR-5700 power problem

What’s the blinking red light indicating? It must have a label of some kind associated with it.

The first thing I’d check is all the speaker wire connections. If you have bare wire connections to the terminals, a single stray strand touching the other speaker terminal can activate the receiver’s protection mode. This is true for both ends, the receiver and the speaker. Also, on the receiver end, if a stray strand from the positive terminal touches the chassis, that could also trigger the protect mode.

Another problem might be if your speakers are 4-ohm, and your receiver isn’t rated for that. It can play fine for a number of years, but eventually the amplifier section will fail. Same thing if your speakers are inefficient and require a high volume setting.

Regards,
Wayne A. Pflughaupt
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“A nice mid-fi system,” according to an audiophile acquaintance.

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#3
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5/2/06 at 11:59am
  • Joined: March 2002
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Re: Denon AVR-5700 power problem

Does the denon have a master reset still?
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#4
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1/14/09 at 11:15am
  • Joined: January 2009
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Re: Denon AVR-5700 power problem

My Denon AVR 5700 won't turn on either. The manual says to check either shorted outputs or cooling. Mine won't turn on when cold, so only thing they say is the outputs. Took a meter to all the speaker leads. No short. I have seen several posts on other websites about this problem and nobody has the answer. They all say "probably damaged something internal".

The only "reset" I know if is the memory reset. When turning on, you hold two buttons in and get a default setting. This didn't work either because the set still went into "red blinky mode".

I checked for licensed repair facilities and the nearest to me is 200mi.

Hope someone knows what's going on because I have heard about several 5700's having this problem.
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#5
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1/15/09 at 6:53am
  • Joined: January 2009
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Re: Denon AVR-5700 power problem

Gathering more information on this problem, I think Wayne has hit it on the head when he said 4 ohm speakers will fry it sooner or later. I found that my speakers were 4 ohm. The 5700 is rated 6-16 ohm. Of course, when I bought the system (at a very high end Hi-Fi store) they sold me those 4 ohm speakers for the 5700. Go figure!!!
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#6
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11/3/09 at 3:49pm
  • Joined: July 2009
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My two cents.  I've owned an AVR-5700 for probably ten years and have been running two NHT 1.3 speakers in parallel as center channels (above and below TV).  That's definitely a low ohm load but it's run very well over the years with no overheating or shutting down even at some high volumes on ocassion. 

But recently I'm experiencing a problem wherein when the unit gets too warm (at least that's my guess) it
cuts the preamp signal way down (I say "preamp" signal as today I used the preamp out connections and experienced the same problem using Adcom power amplifiers) but does not shut it off.  Flipping the mute off and on sometimes brings back the full signal or simply letting it rest (read "cool") for just a bit.  When the signal does come back the unit works just fine with either the internal or external amplifiers running the speakers.

I'm thinking my problem may be the fan (or its thermostat) as it was not running when the signal was cut down after extended higher volumes.  Perhaps using the external Adcom amps allowed the Denon to run longer as its own power amps were not helping heat up the internal circuitry.  I'll probably try checking into a fan/thermostat replacement if I can get some good advice somewhere.
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