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Denon 825amp No display and relay keeps clicking.

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  • Anonymous Mar 09, 2009

    My unit has the same fault did you manage to solve the problem?

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  • 319 Answers

Unit probably has problem in standby circuit. Take in for service

Posted on Apr 29, 2008

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1 Answer

My Denon AVR 1610 has no display. Power comes on but nothing else. I have tried reset but does not help


First off, you will need to listen carefully at the top of the receiver. With the unit unit off, as you push the power button, you should an immediate click. Within 5-20 seconds, you should hear another. If you hear the second click, the amplifier is probably not damaged. In that case, you have a display microprocessor IC(computer within your receiver) bad, of some voltage to the IC is missing. If you require more information, or would like to inquire about having it repaired, please visit my website ay audioserviceclinic.com. You may contact there. Thank you.

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How do I restore factory defaults on my Denon AVR-2809? I can't see it in the manual. Thanks


Register and download the USER GUIDE (10.6MB) for free at retrevo.com

http://www.retrevo.com/support/Denon-AVR-2809CI-Receivers-manual/id/21864dj590/t/2/

Page 60

Resetting the Microprocessor

Perform this procedure if the display is abnormal or if operations cannot be performed.

When the microprocessor is reset, all the settings are reset to their default values.


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2 Press <POWER> while simultaneously pressing
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3 Once the display starts flashing at intervals of about 1
second, release the two buttons.






Mar 30, 2011 | Denon Amplifiers & Preamps

1 Answer

Avr-f100 surround left and centre working intermittently can anyone help.


The same happens with my POA-F100, but only the center channel is affected (apparently the most important for movie/tv).

Seems to be a malfunction of the speaker relay (you can hear it clicking some seconds after power on). In my case a (sometimes pretty rude) hit on the side of the compartment with the flat hand helps, so the contact just mechanically hangs.

If I find the time I will open up the compartment to see if I can get a fitting spare part relay and solder it in (so I don't have to beat my Denon Setup any more ;-)

Jan 03, 2011 | Denon Amplifiers & Preamps

1 Answer

If i turn the power on , it switch off by it self and the power light flicker red


The set powers off because there is a cut off by the error amp which controls the main relay to switch off for safety from burning out any circuits. It could be failure of the output drive/ the short in the speakers or failure of the error amp section. It is tricky to find out the actual fault because you will have to keep testing by elimination, disconnect power output section, preamp section, and check if this releases the power switching.. Helpful? Good day

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1 Answer

Denon PMA250II Amp playing up.


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Jan 22, 2010 | Amplifiers & Preamps

1 Answer

I have a Denon UPA-100 amp as part of a 4 piece Denon 100 set,


THe click you would hear is the speaker relay turning on the speakers. If a problem is detected in the amplifier seciton, the relay will not engage. This is often called protect mode and is done to prevent damage to either the speakers or the amp itself. If I remember correctly, these units have discrete transistor outputs and can easily be repaired. These are not the easiest for access however. I would suggest a trip to the repair shop for this one. Expect a parts cost in the $40 range.

Dan

Nov 28, 2009 | Denon Amplifiers & Preamps

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Denon PMA-520 amplifier clicking noise


Sounds to me like a bad capacitor, but not sure. I would look inside for any slightly bulging capacitors or capacitors whose plastic wrappings have melted or shrunk or cracked (most caps are cylindrical). Please unplug first and be careful inside there and do not touch anything. I actually came across your post while looking for info on what I think is the same amp my brothers had but blew, and I was going to ask if they still had it so I could repair it. I've been very successful at repairing my electronic equipment such as Altec Lansing Model 95 speaker crossovers, power supply in Emu Emax II, and almost everything else in my studio.

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2 Answers

Denon AVR 1706 Powers on display then shuts off lght blinks red


replace all the electrolytic capacitors in the power supply. i had the exact same problem with mine and once i replaced the capacitors it powered up and stayed on and worked perfect.
these capacitors tend to fail as they're of poor quality.
this fault is very common on denon receivers, especially the later models.

hope this helps?

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Denon 455


Hi John
For sure, can at least get an understanding of what may be wrong. You hear the power relay click in, but perhaps no secondary click of the speaker protection relay.  This is generally caused by a fault condition in the amp, resulting in a DC offset voltage being present in the speaker outputs, then detected by the protection circuit, does not allow the speakers to be connected to protect them from damage.  . How far do you want to get into it?
regards robotek

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1 Answer

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

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