Question about Casio Privia Px330 Px-330 88 Key Digital Piano New

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My Casio Px 330 keyboard is about 1.5 years old. After the instrument has been played for 20 minutes or so, one note (D above middle C) sounds very loud regardless of how hard it is struck. The problem is intermittent, though it may be more pronounced when the damper pedal is used. No other notes show the problem thus far; but I want to have the keyboard serviced and want to give the repair shop a heads up on what to be looking for on the entire keyboard.

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This is a problem with one of the two contacts for that key. The contacts close at different times as the key is depressed and the time it takes between is measured as velocity which is used to control the loudness as in a regular piano. The contacts are conductive rubber pills. After a lot of dis-assembly you can clean them with 99% isoprphyl alcohol and Q Tips. Clean both the pills and the circuit traces on the board they are pressed against. Be very careful of the ribbon cables between the halves of the case.

Posted on Jun 02, 2011

  • Jon Bruce
    Jon Bruce Nov 04, 2013

    Fred Yearian How do you dis assemble the keys to get to the contacts?

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6ya6ya
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