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Yamaha psr-270 keyboard almost all keys are not functioning

I had this 61 key keyboard for about 9 or 10 years and i constentley played it. at first 2 keys did not work then i tryed to clean the contacts with water but it only got worser. now only about 10 or 15 keys work. it also has touch response. can someone plz help me?




p.s. it is not a amp. i just can't find the musical instroments

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  • todd w
    todd w Dec 09, 2008

    thank you very much. i thought that was the problem but i wasn't sure.

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Most if not all Yamaha PSR series have a silcon pad sandwiched between each octave and a continuous printed circuit card that runs the length of the keyboard. What I have experienced is the raised **** (2 per note) weaken and split near the larger portion of the 12 note silicon section. Depending on which one splits..you can have a note that plays full volume or no volume at all. Basically the processor timer measures the difference in contact time between the first *** touching the printed circuit point and the second *** touching it's contact point...it calculates the time difference and assigns it a "speed of impact" to derive a volume level for that specific note.
New silicon pads are somewhat difficult to find (they cannot be repaired) and the task to replace them is tedious but not impossible. Exercise great care in popping the printed circuit board out as it is thin and fragile. Pull the old silicon pad out and slip the new ones in place..make absolutely sure everything is in its place (including the keys) and gradually snap the printed circuit board back in place... keep in mind that the board is a one piece full length component. Patience is req'd
Each pad costs about 10-12$$ ...a 5-octave kybd has 5 pads....so it'll cost about 50-60 bucks to replace them

Posted on Dec 09, 2008

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