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I have a denon amp model-avr 485 when i turn power on the red light flashes then power tries to come on but clicks and turns back off

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Posted on Jan 02, 2017

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SOURCE: denon avr2105

See this post:

http://www.fixya.com/support/t421934-power_button_flashing_red

Sounds like the same problem to me...

Posted on May 26, 2008

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SOURCE: denon avr-2106 problem!!!

You're drawing too much power from it. Sounds like maybe your sub is hooked up wrong, double check that.

Posted on Jul 06, 2008

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SOURCE: denon avr 1507 no power

still under factory warrenty if its actualy a new model and a new purchase.

Posted on Aug 01, 2008

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SOURCE: Power On + red LED turns on + but final relay (click) don't come so no sound

Your audio output transistors are shorted and your unit is staying in "protect " mode to protect your speakers from 40 to 60 volts that is being sent at them from the shorted outputs. If you can use a meter you won't need the schematic MOST likely because the outputs are USUALLY the only parts that short out. The output transistors( or chip ) are mounted to the large, finned heatsink. The #'s on the transistors start with "2SA-" and "2SC-" followed by numbers. There are two output transistors per channel. If your unit uses an IC for audio output then the # on the IC will be "STK-" followed by numbers. These parts are available from tritronicsinc.com. Good Luck!

barneyluc

Posted on Oct 17, 2008

  • 163 Answers

SOURCE: 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

Posted on May 09, 2009

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1 Answer

Denon AVR-1312 turns on displays for a second switches off and the red light starts to flash


you most likely have a shortedchannel in the amp that would need to be repaired

Jul 31, 2014 | Denon AVR1312 51 Channels Receiver

1 Answer

I have had my Denon AVR-485 for a few years without a problem, just recently when you turn it on it shuts down within a few seconds. Any suggestions?


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Aug 21, 2011 | Denon AVR-485 Receiver

1 Answer

The green light flashes when power is turned on and then flashes red and turns off. Can this be reset ?


what do i do when my DENON AVR-1506 turns on then flashes red and turns off?

Mar 08, 2011 | Denon AVR-1506 Receiver

1 Answer

After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be 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 Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif 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.

Nov 16, 2009 | Denon AVR-485 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

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....

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May 04, 2009 | Denon AVR-485 Receiver

2 Answers

No surround on Denon AVR-485


Hi you must put the amp into prolgic mode this is fed by a stereo siganal the rears will sound vague and hollow that's all you will get this willnot work with 5.1 or 7.1 good luck

Feb 22, 2009 | Denon AVR-485 Receiver

1 Answer

AVR-485 Quit working


I just bought this machine...and had earlier seen your post. I was looking at the "microprocessor re-initialization" part and thought, hey, it may be worth a try for you.

So, consider re-initializing (resetting) the machine. This can be done by:

1) Turn off the unit using the *main* power switch
2) While holding both Speaker A and B button, turn on the machine using the *main* power switch
3) You should see the main display flash at 1 sec intervals. Let go of the speaker buttons to finish.

Hope it helps,

Eddie V.

Dec 02, 2008 | Denon AVR-485 Receiver

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