Casio Privia PX3 88Key Portable Stage Piano Logo
Anonymous
Anonymous Posted on Apr 19, 2011
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I've got a Casio Privia (PX-400R) keyboard and it seems that the pedal jack has gone out. It's the 3 pedal jack circuit board. I took the keyboard apart almost completely to take a closer look at the jack board, and couldn't see anything wrong with it. When I put it back together, the damper worked again. However, it seems to just work on and off, sometimes seeming to depend on the position of the 1/4" jack plug. Has anyone got any ideas or a schematic for this keyboard? I've gotten another pedal to eliminate the possibility of a wire/pedal issue, so I'm quite sure the problem is with the jack. Thanks! Kyle

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  • Anonymous Apr 19, 2011

    The board with the jacks is labeled "m419 psb4 A no.2 - C7/A30c5". Upon close inspection there is no disturbed or missing solder connections either on the board or on the soldering connecting the wires to the main board. I have no clue what is causing this problem, but for the second time after opening the keyboard up and putting it back together after inspection, the sustain is working again. I expect this to be temporary success, and I'm being very careful not to disturb the input positioning of the pedal for now. Running out of ideas... :(

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  • Posted on Apr 19, 2011
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Hi genoness1,

If you noticed that the pedal works on and off depending on the jack plug positioning, it is because the jack is already broken loose from the solder on the board. If the pedal that you are using can normally open as most or normally closed like Roland types, you can still replace the loosed jack. Unit has to be opened and correct jack replaced.

Hope it helps.

Thank you for using FixYa.

  • Anonymous Apr 19, 2011

    Hi genoness1,

    Does your pedal has a straight molded plug? As commonly happens with straight molded plugs, an electrical break occurs within the bent section, causing the pedal to fail or to work intermittently. You can replace it with a sturdy right angle plug. The right-angle plug is great for keyboard pedals. It keeps the cable wires from fraying and is less prone to broken or intermittent connection.

    Hope it helps.

    Thank you for using FixYa.

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