Question about Pioneer VSX-D498 Receiver

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Volume control keeps going up and down when I turn down the volum

When I turn the volume down the digital read out doesnt go all the way down it just goes up when i turn it down

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Volume Switch (Encoder) needs to be replaced professionally. Desolder the old one properly, and insert/solder the new part. Problem solved. Order part from here:

http://parts.pioneerelectronics.com/model.asp?modelNum=VSXD498

Part number asx7004

Posted on Mar 24, 2009

  • 2 more comments 
  • gruber1010 Feb 23, 2011

    This part costs about $20 plus shipping, but generally there is no need to buy a new one. Usually the problem is that the contacts inside the control become dirty and oxidized and all they need is cleaning.

    Here's is how to repair the part:

    Remove the control from the front PCB. You will find four tabs on the front of the control. Put the control in a vice and pry the tabs up with a small precision screwdriver or equivalent. Pull the control apart. You will have three pieces, 1) the metal collar, 2) the plastic shaft with the contact wheel, and 3) the back with the wiper arms. Soak the 3 parts in some type of organic solvent such as mineral spirits, brake cleaner or the like to dissolve and clean off all the grease that you will find. Next clean the contact wheel with a cotton cloth and electronic contact cleaner. Ditto for the back with the wiper arms.

    Put some silicone grease or dielectric grease on the contact wheel and the plastic shaft, and then reassemble, squeezing the tabs back in place with a needle nose pliers. Solder it back on the PCB and it should work good as new.

  • stihl888
    stihl888 May 04, 2014

    Realy good tip Gruber, this worked perfect for me.

  • stihl888
    stihl888 May 04, 2014

    I might add that theres no need to remove (desolder) the control knob from the board all that's required is to gently pry back the 4 metal tabs to release the control knob.

  • stihl888
    stihl888 May 04, 2014

    Add a Commentull the knob off and clean up the blackened surface being careful not to remove to much of the silver surface, i think the main problem with my controller was the excess build up of lube inside the case gathering around the contact points. Once clean put the knob back together .

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