Question about Denon AVR-1906 Receiver

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Denon AVR-1508 I have a Denon AVR-1508. It works great. However, today I'm having a problem even switching iot on! It is in standby mode with the red light around the standby button flashing. When I switch the sytem on it comes on for just a few seconds and then immediately truns off and goes back to standby mode with the red light flashing again. Any ideas what is wrong?

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  • Anonymous Mar 08, 2008

    standby light flashes then stays on.disconected all input and outputs,but standby light still stays on.what could be the problem,please help

  • Rensanz Mar 27, 2008

    Having the same issue! It worked fine for about 2 weeks, and all of a sudden, I get the same blinking red light. Oftern, after trying it for 20-30 times, I can get it to come on. Plenty of ventilation, and I've checked the speaker connections in back. Any ideas?

  • tfpitt Sep 29, 2008

    my avr-3600 will not remain turned on

    it shuts off after a few seconds

  • beach_babe16 Jan 13, 2009

    Same thing happening with us.
    Any simple solutions?


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I had exactly the same problem. On youtube there is a video that advises to replace 2 voltage regulators on a heatsink on the left.
After removing the complete backpanel I was able to mount 2 new regulators 7815 and 7915 (using mica insulation sheets etc). After this I still could not measure the 15 V DC behind the regulator. Thorough inspection of the most left vertical PCB, which has been mounted on the board with the voltage regulators, learned that 4 diodes type 1N4007 and 4 resistors (0.22 ohm, 1W, metalfilm) had been burnt. 2 diodes had shortcircuit in both directions. From a service manual I downloaded for free from the Internet I learned that these 4 diodes do deliver the direct current to the voltage regulators I already replaced. These 4 diodes and 4 resistors can easily be replaced because they can directly be reached. After replacement I started the machine and happily the red light turned green and the machine is perfectly OK. Cost of all parts ca EUR 5,- :-) Part numbers in service manual: D523-D526 and R516-R519. Hope I can help anyone to save this great receiver from the garbage dump.
Nico Aarts

Posted on Mar 28, 2015

  • Samweis Gamgee Mar 28, 2015

    Awesome. I wish I had received this earlier.. Already took the receiver to a electronics repair shop which charged me over $100 US. Nonetheless great answer!

  • Nico Aarts
    Nico Aarts Mar 29, 2015

    Hi Samweis, I'am sorry my advise came too late for you. I expect that several Denon receiververs will face these type of failures because they are ca 8 years on the market by now. I have to thank norcal715 who put me on track with his excellent youtube video called 'blinking red light fix'!

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If your amp looks like it's going to work as normal (ie the front display lights up as it should etc), but then the amp goes into protection mode when the anti-thud circuit times out, then I know what's likely to be wrong.

It's one of the power amplifier channels which has gone faulty.

I just found this out after having this problem with my AVR-1906.

I took the amp apart and de-soldered the suspected channel power transistors (centre channel in my case).....and hey-presto! it fired up as normal (obviously the centre channel would be out of service).

I have ordered the replacement transistors from Farnell (UK) at a miserly cost of around £2-£3 each.

Just waiting for them to arrive.

An alternative is, if you don't use all your channels, take the transistors from a known working but not needed channel and swap them over with the duff ones.

Hope thats of use!

Posted on Aug 16, 2008

  • Samweis Gamgee Sep 10, 2012

    Sorry to ****** but.. Hey foxjay thanks for the tip! I recently had my AVR-1906 stop working after one of the rear channels shorted. I smelt something funky (melting?) but no smoke... Now the thing goes into protect mode when it boots up. Does this sound similar to what went wront with yours? Care to share a few more details about how to fix it? Thanks!

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Sounds like overload protection
turn the volume all the way down, then turn it on
if that doesn't do it you may have a short in one of the speaker lines - try disconnecting them one at a time

Posted on Jan 13, 2008

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