Question about Denon AVR-4802 Receiver

17 Answers

Receiver shuts off during action effect sounds on my DVD/BR

The receiver will kick off during explosions or load music in a movie scene. The stand by light will flash.
I need to re start the receiver, but it keeps happening. What do you recommend?

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  • Denon Master
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I quote from you : "The receiver will kick off during explosions or load music in a movie scene. The stand by light will flash. "

That means that either there is a short on the cable, or the power amp IC is failing.

The second is more likely.

Posted on Jan 09, 2009

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There are a number of possibilites that can cause this. I will assume that this unit has been in operation for some time so that no changes have been introduced which could explain this. That being said, lets look at the possible causes:

1) Incorrect impedence of speakers - This has been mentioned and would not normally be a problem at lower volume levels because the amp could still handle the load although working too hard, generating more heat than normal.

2) Internal short in speakers - While remote, when the speakers are reproducing the explosions, the cones move more than they normally would possibly exposing a portion of the voice coil to the magnet. If there is a defect, the coil could be shorting to the speaker frame inside the "gap" (area between the magnet and frame where the coil moves). This one will be hard to prove easily.

3) The front end of the receiver is passing along some DC curernt that at the increased volume level is sufficient to trigger the protection circuit. The output should be AC only. Any DC voltage over about 0.1 - 0.2V will cause the protection circuit to kick in.

In order to find out what the problem is, some measurements will need to be taken. If you have a DVM, try placing it acros the speaker terminals measuring the DC voltage. It should read close to 0. If not, then the amp has a problem that needs to be addressed. Please note that the system may appear to function correctly even with some DC voltage. This DC will tend to heat up the voice coil and untimately fry the speakers.

Keep us posted.

Dan

Posted on Jan 06, 2009

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Just wondering if you still need assistance with this issue. If so let us know.

Thanks

Rob

Posted on Jan 06, 2009

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  • Master
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As posted in solution one this is an issue having to do with the protection feature.  Possible problems are:
1.  Speaker wire is not of proper gauge or impedance. 2.  Speakers are not of proper impedance. 3.  You are trying to hear the sounds at a higher volume than that of what the product is able to create. 4. Capacitors are going bad in the amplifier.
Solutions: Take the manual or obtain the manual, and get the recommended wires and or speakers. Keep the volume at half level for movie and music reproduction and slowly step up from that level to find what your product is capable of reproducing. If all else fails above it is more than likely that the capacitors are going bad and will need to be replaced by and authorized service center.

Posted on Jan 06, 2009

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Check to make sure you do not have a short in the cord for the speakers that is causing it to pull more power than is supplied, causing it to overload and cut off, going in to protective mode so that it will not catch fire from too much power use. Do this by checking the connections leading to the speakers and make sure they are in firmly in the speaker and the receiver and that they are not broken or faulty. If problem persists, try getting new cords to replace the old ones.

Posted on Jan 06, 2009

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  • 237 Answers

Try these guys, this seems to be a common problem
but not yet documented!

Denon Technical Support, Operational Support and Customer Service
Denon offers in-house factory Technical Support through our New Jersey location. Product Operational Support and Customer Service is also available at this location. Our contact information is as follows:

Phone Hours of Operation: 9:00AM to 5:00PM ET, M-F

Voice:
(800) 497-8921 Customer Service & Technical Support

Fax:
(201) 762-6695 Tech Support and Customer Service

Posted on Jan 06, 2009

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  • Master
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Please provide some more infformation/
Thanks for using FixYa

Posted on Jan 06, 2009

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  • 66 Answers

You have an overload limit switch which shuts the unit down to protect catistrofic failure. Be sure you are not overloading with incorrect speaker load

Posted on Jan 06, 2009

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  • Master
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Sir,

Sounds like the overload protection is cutting in. What impedance speakers do you have connected to the A and B speaker connections? If the impedance is too low the receiver will try to output too much current and the system will overload.

Also check this Link

Plz also tell me the brand name and model no.?

thanks
good luck

Posted on Jan 06, 2009

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I've come to three possible solutions for this problem.
Check to see if your speaker leads are defective, corroded, thread-bare or very thin. If they are not check to see need to replace the speaker wires. 
Otherwise your amp is clipping. The protection circuit on your amp is detecting square wave/clipping. You're trying to push the amp past it's max output. You're going to need a bigger amp.

Posted on Dec 29, 2008

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This is a bass issue try to decrerase the bass level.

if that is not helping well i recommend u with a factory reset.

Posted on Dec 29, 2008

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Not sure about the music in a movie scene. But it does sound like it has an auto shut off so it doesn't blow the speakers

Posted on Dec 29, 2008

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  • Master
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I would recommend to...

Check speaker wires, should be connected properly.

If any extra speaker is attached, that is not recommended by
manufacturer, remove it from unit.

Kick OFF (protection activation) seems impedance issue between speakers and amplifiers.

Posted on Dec 29, 2008

  • Shahid Electronics
    Shahid Electronics Jan 06, 2009

    Rejecting solutions without any feedback? How can we move further then to sort out problem?

  • Shahid Electronics
    Shahid Electronics Jan 06, 2009

    Keep volume very low of receiver and enjoy sound system. This is only solution as you are not providing any more info.

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Try turning the volume down some. if that dosent help try running it on external speakers

Posted on Dec 29, 2008

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  • Master
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Hi and welcome to FixYa,

While not normal, this could be expected. The amplifier section of the receiver is pushing so many watts into the speakers, sometimes to the point of clipping or over driving. The built-in protection senses the too much power and shuts the system down. Workarounds could be:

  • lower the volume a little;
  • lower the BASS a little;
  • disable LOUDness;
  • relocate the speakers in such a way as sound is distributed more evenly or more focused to your preference. In that way, the volume could be lowered without sacrificing listening level;
  • in some cases, the speakers may require check with an ohmmeter to verify that they are still within ohmage/specs.
Good luck and Thank you for using FixYa.

Posted on Dec 29, 2008

  • Louie  Role
    Louie Role Dec 29, 2008

    You could also add more speakers to be connected in series with the original speakers thus increasing their impedance making the amplifier's auto protect think it is safe to maintain high volume on "explosions or load music".

    Cheers.


  • Louie  Role
    Louie Role Jan 06, 2009

    Any updates on developments or even the lack of any?

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Sthe subwoofer is bottoming out at the bump plate causing it to ground out. Either turn down the gain, or upgrade to a subwoofer that will take the abuse at the volume you are accustomed.

Posted on Dec 29, 2008

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  • 163 Answers

Will you tried it to reset?

Posted on Dec 29, 2008

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1 Answer

Hi, I have a Yamaha HTR - 6130 that seems O.K. until loud action scenes & explosions,then it shuts itself off.


There are two causes for this. One that there is a fault on the amp that is causing an overload circuit to trip and shut itself down. Or the settings of your speakers levels are wrong. So you are turning it up to hear the quiet parts of movies and therefore when louder sections come along your are driving the amp too much.
Some DVD discs that have THX on them have a sound set up on them. If you have one access the THX sound menu on the disc and adjust your speakers to produce the correct levels. If it does happen after that there's a fault.
By the way most of the George Lucas films (Star Wars) will have THX on them.

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Clearly, it thinks you're overdriving it.

Blinking Power Indicator every 2 seconds means the internal temperature is high. (Page 76 of the manual)

Every half-second - speaker impedance too low.

Consider the load presented by the speakers and what their minimum impedance might be.

Check for loose speaker wires.

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