Question about Denon AVR-3805 Receiver

2 Answers

Denon AVR-3805 I have a Denon AVR-3805. It works great. However, today I'm having a problem even switching it on! It is in standby mode with the red light around the standby button is 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? I disconnected all the inputs and output connections to no avail. I tried to reinitialize the processor to no avail. Any suggestions???? Thanks, Lance

Posted by on

  • 1 more comment 
  • tricor May 25, 2008

    I am having the exact same problem

  • Anonymous Jun 15, 2008

    Exact same problem. Unit turns itself off after a few seconds or after a couple of minutes. Nothing has changed on our system nor have the room conditions changed to cause any type of flucuation. This is extremely frustrating and nothing you have posted works.

  • Anonymous Jun 24, 2008

    My Denon 3805 also shuts down for unexplained reasons. Recently, it has turned off completely. When I press the "on" button, it turns from red to green but nothing else lights up. Is an authorized Denon dealer my only option?

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 13 Answers

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

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

It's likely that you have shorted some speaker outputs, I had that problem and sorted it. Unfortunately it does mean replacing some output transistors..the devices are dificult to get to just to add insult to injury. They are the devices that are mounted directly onto the large heatsink and solder connected to the bottom circuit board. You only have to change the matched pair that you have blown....tricky to identify which ones without some electronics knowledge. The power output section does have some fuses to protect it but sadly these do not appear to be fast enough to stop "one" from damaging the power output stage if you unfortunately short outputs. The transistors are available from Farnell, use pin compatible replacements SAP15N and SAP15P.....all the best. Doctor Bill

Posted on May 26, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to connect a walkman to a Denon AVR-3805


headphone jack cable to 2x RCA/phono (red & white) cable. Connect that to a spare input on the amp.

Sep 02, 2014 | Denon AVR-3805 Receiver

1 Answer

My Denon AVR-75 seems to stay in standby (red standby light is on) and I don'd get surround sound through it. How do I get it out of standby?


if the receiver does not power on from standby there is a problem like bad power supply or even bad macroprocessor. You need to bring it to a service center for diagnosing. 10-years old receiver, maybe better to buy new one.

Nov 23, 2011 | Denon AVR-75

1 Answer

Can you describe characteristics of Denon avr 3805 standby transformer?


The standby transformer supplies 12volt AC at 300mA current.

Jun 01, 2011 | Denon AVR-3805 Receiver

1 Answer

Video off for Denon AVR-3805


please see if this tricky approach will work

1) go and download the file v.vtr
http://www.sendspace.com/file/tb9yf3

2) borrow a pocket pc with infrad red port

3) download the program vito remote and install that

4) use the file v.vtr and set up the device

5) the F1 command should be same as the "video off" button

Aug 16, 2008 | Denon AVR-3805 Receiver

3 Answers

Denon AVR-1508


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

Jan 13, 2008 | Denon AVR-1906 Receiver

Not finding what you are looking for?
Denon AVR-3805 Receiver Logo

575 people viewed this question

Ask a Question

Usually answered in minutes!

Top Denon Audio & Video Receivers Experts

 Elex
Elex

Level 2 Expert

49 Answers

jonpoint

Level 1 Expert

4 Answers

Tech Leprechaun
Tech Leprechaun

Level 2 Expert

61 Answers

Are you a Denon Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...