Question about Sony MHC-RX70 Shelf System

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Sony rx70 3 cd changer

The on/off button doesn't work, the volume control doesn't work - it has a mind of it's own and now disc 1 doesn't work and disc 2 is temporamental.

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  • johanknopper Aug 25, 2008

    Hi,

    I have a similar problem. The Volumebutton works really strange. When turning up the volume it´s going down and the other way around.

    With the remote controle it works fine.

    I tried to clean the inside by removing the cover but is does not help.



    Has anyone an idea what it can be?



    Kind regards,

    Johan Knopper

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I would take it back to sony they will take it back and hopfully get everything back working cause i had the rx70 and had the same issue sent it back to sony and when it came back it felt like it was a totaly new machine

Posted on Sep 25, 2011

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I also have exactly the same problem with the volume control. I was hoping to resolve the problem by doing some internal cleaning but seems like johanknopper tried it before.

I was thinking of buying a remote control separately as I lost mine in relocations. Found a second hand on-line but I am not sure if they all have the same frequency and if it works with mine.

Any Ideas?

Posted on Nov 16, 2008

  • prinses Mar 27, 2011

    Had the same problem. Volume went up or down at random when volumepot was turned. It even did go to max on it's own!! Not nice.
    Fixed it too :) You gotta take the volume 'potentiometer' out of the frontpanel. Once out, ply back the four metal clips and take off the aluminium part. Then you see the inside of this 'potentometer'. It's a special one as it has a metal ring at the edge and a 'toothwheel' like inner part and a few little pins which slide against these. Mine were covered with grease which took some time to clean off with cotton swaps and alcohol. Guess the grease got in from the potentiometer shaft. Refitted everything and it worked fine again.
    To get to the potentiometer: Take the stereo cover off, take two more side screws off and 5 more from the underside just below the cassette player. Switch on the stereo and push the button to open the CD player slide. Switch off again while slide is open. At the bottom tilt the plastic edges till they slide over their edges to release them. You can now slide the whole frontpanel far enough forward to get access to the volume potentiometer from the inside. Pull the plastic button from it at the frontpanel and unscrew the pot fixing screw. At the other side (inside) you'll see a little pcb where the pot is soldered onto. Pull the pot backwards. Unsolder the three wires going to it and you can take the pot out for cleaning. Many words but once started it will show itself. Good luck. You can do it too :)

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