Question about Amplifiers & Preamps

4 Answers

DENON Input selector jumps randomly

I have DENON amplifier PMA-980R
It does a strange thing. The input selector button(CD, Tuner,AUX, Data etc) jumps like crazy from one selection to another and I have to turn it of. It does it randomly and sometimes stops, sometimes won't work for days.I can't found any pattern as when it does it.
Can you , please help, as it is a fantastic amp and I really want it fixed.
Thanks
Vesna

Posted by on

4 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

I have a PMA-535R. Same problem but slightly different dialknob. I fixed it by spraying a contactspray and WD-40 into the knob itself. This does mean you have to disassemble the front of the amp and take out print of the dialknob. The knob has a plastic dustcovere that you will have to lift. Good luck

Posted on Apr 20, 2010

  • Justme OH
    Justme OH Oct 21, 2013

    Brilliant Thanks 2013 just buying a set up for my son Nearly sent it back to Ebay seller.

  • Justme OH
    Justme OH Oct 21, 2013

    Works Many Thanks 2013 Christmas present. Nealy sent back to eBay seller :)

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Same issue with my PMA655R Try removing the knob cleaning out the grease and putting new grease should fix.

Posted on Feb 10, 2016

It is possibly broken!!

Posted on Oct 12, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have the same issue on my PMA-2000r

Posted on Oct 12, 2009

  • dan_berglin Oct 12, 2009

    I have the same issue on my PMA-2000r

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

We have a DENON L.C twin transformer amplifier PMA-735R that has an input selector that freaks out now and again. Recently it has gotten worse, it just goes back and forth between tuner and cd etc. for...


Hi Readers to of Fixya,
This entry is January 22, 2016.
I own a Denon PMA 735R which I bought new in 1999, it is very good Amp; starting about a few years ago the input selector would occasionally randomly jump from CD to Phono to Tape etc., but would always end up back at CD so it was not terribly annoying until a few days ago when it started happening all the time. I am a very knowledgeable electronics person (I built musical keyboards at one time) so my thought was just that it was a dust problem and I started with that premise. I fixed it using an Electrical Parts Cleaner spray and here is how I did it:
I unplugged it, removed the CD input RCA cables and removed the L & R speaker cables and took it off its shelf and set it on a towel on my soft sofa; I removed the casing by unscrewing four big silver screws on the sides (my model is silver) and the three small black screws on the back top; I removed the Input Selector indicator knob on the front and the Record Out Selector indicator knob and the Volume knob, I then removed the small nut that holds the three of them tightly in place to the front panel; I then stood it on its back so that the front was facing up; I then sprayed my Electrical Parts Cleaner spray into the Input Selector indicator post liberally and then put the knob back in place and kept turning the indicator back and forth for a few minutes to work the cleaner inside the post down into the circuit board connection; I did the same with the Record Out Selector indicator post and I did the same with the Volume post; I then put the small nuts back on the three posts and tightened them; I then put the knobs back on the three posts; I then stood it back on its normal upright position and put the casing back on and then the screws; I placed back on its shelf and hooked up the cables and switched it back on and played my CD's, it has been working perfectly fine. The whole process took less than 30 minutes.I hope this helps.

Feb 20, 2012 | Denon Amplifiers & Preamps

1 Answer

Why can't I get my turntable to sound right on my


Turn table? You mean like records? lol
The output of record players is different voltage than like cd players, etc...
Does your stereo have input for turntable or are you hooking it up to an extra rca input? I had mine hooked up wrong before and it did same thing.

Dec 11, 2011 | Denon Amplifiers & Preamps

1 Answer

Hi, i have a Denon PMA 735 R amplifier which shuts down when volume increases suddenly.


Sounds like you have output transistor problems. Does it have a red protection light that comes on when it shuts down? If it does it will need serviced.

Dec 06, 2011 | Amplifiers & Preamps

1 Answer

Denon PMA 700 AE maximum phono input signal


Why? Are you contemplating connection of something OTHER THAN A PHONO CARTRIDGE to it?

Be advised, only a phono cartridge should be connected to a Phono input. There's more going on behind it than just voltage step-up.

Mar 07, 2010 | Amplifiers & Preamps

1 Answer

Problem with the Denon PMA 6.5 amplifier. The source selector keeps on switching between the CD and AUX inputs randomly on its own. Any idea what could be the problem?


bring a good contact cleaner from radio shack near you and apply spray with pipe in the selector and move it forward and backward.

Dec 01, 2009 | Amplifiers & Preamps

1 Answer

The source selector just starts changing input sources all by itself. Then once started it might just keeping going for minutes. Is there a way to prevent this from happening?


try to apply a spray(contact cleaner) with long pipe to the selector and move it many times(you can get the contact cleaner from radio shack near you.

Nov 29, 2009 | Denon PMA-2000R 2-Channel Amplifier

1 Answer

Denon Amp (PMA-700AE) ignores the signal from CD Player DCD-700


If you can follow the circuit from the input of the cd play socket inside the amp itself you might come accross a Memory Retention Capacitor that supplies an IC. If you do. I can't for certain say one will be there, I would replace it, it might be the cause of the lost memory of your device.
If you don't know what a M R C looks like, they are like electrolytic types, but haven the appearance of being squashed. The value will be low only 0.22uf etc and the volts very low say 5.5. The PC board marking will be different to a normal capictor.

Nov 14, 2009 | Amplifiers & Preamps

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

1,800 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4584 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68223 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...