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Onkyo Integra A-809 input selector switching by itself

Hi, My Onkyo integra A-809's input selector will start randomly switching between input selections. Sometimes it does it very rapidly, and sometimes it works just fine. I'm thinking it must have to do with some interference with the infrared sensor but am not sure. I tried covering the infrared window on the front of the amp but that doesn't work. Any ideas? Should I open up the amp and try and cover or shield the sensor directly? I don't ever use the remote so it wouldn't matter if the sensor was completely blocked.

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  • bchall Mar 01, 2008

    Yes, I have had the same problems for several years. I would love to have a fix.

  • Mcraiga Nov 14, 2008


    How did you get Onkyo to respond regarding this bug and the workaround. I tried emailing their support and never got a response. I took the tip from Siliconchip and did some poking around making sure everything was connected inside and that helped - I went weeks without a problem then it started again. I then grabbed the selector knob and worked it back and forth in multiple directions (not rotating it through its selections but really rocking it back and forth) Once I did this a few months ago I haven't had the problem - it started switching once and I did the rocking thing again and no problems. It must have something to do with the inner connections in the switch. Maybe the contacts somehow got corroded or gummed up. I'm reasonably happy with it now as I have a solution that is simple and keeps it working.



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I'm going to assume that your input selector knob just turns and turns, with no stop. Correct? If that the case, you have what's called a Rotary Encoder, which is most likely bad; the very kind of Encoder is used for your volume control. This is not something you can easily fix. It provides inputs to your display microprocessor IC(one of the computers in your unit) It can also be the microprocessor IC, and an input switching control IC. Neither are DIY repairs. If you'd like more information, or would like inquire about repairing your unit, please visit my website at You may contact me there. Thank you.

Posted on Dec 16, 2014

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The solution is quite simple - the electrical contact cleaner.

Posted on Aug 16, 2013

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Onkyo knows about this bug and has a rather expensive workaround available.

Posted on Nov 13, 2008

  • strBean Nov 14, 2008

    I took the amp to a service shop in Portland, Oregon called
    Innersound. I don't know how they got Onkyo to respond and I'm not
    sure what they did to fix the problem. They said they were talking to
    Onkyo. They charged me $150. It works now - I can occasionally hear
    the original thing going nuts in there, but it doesn't affect the
    source selection. Go figure. Sorry, not a very technical reply. :~)


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This is not an IR problem. Could be just loose connectors and dry joints. You'll need to open the unit and visual inspection of the PCB and connector for abnormality.

Good luck.

Posted on Apr 29, 2008

  • Rodrigo Bernabe
    Rodrigo Bernabe Nov 23, 2008

    Hello Mcraiga,

    If all connector had been check inside for lose connection, could be
    a dry solder joint in any of the connectors too...creating intermittent
    contact rendering the input selector to play up. Another thing is the input selector
    of your unit. Aside from the remote, is there any rotary selector at the front panel,
    sort of an encoder rotary...if there is, it might needs servicing...grease inside might
    gummed up.

    Good Luck.


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