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A couple of keys don't make a sound ? one never, one intermittently. It is a roland 250s digital piano. It was my brother in law's, and was passed on to me when he passed. He had been known to fix it himself. Does this sound like something a somewhat handy person could fix?

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The contacts of most of these use a conductive rubber pill that is pressed against circuit traces with a hard black conductive coating.
These probably need cleaning. One has to disassemble the key switch area and clean both the silicone rubber "pills" and the traces where they contact. Carefully use 91 or 99% isoprophyl alcohol and a Q-Tip to clean these. The black pills are under silicone rubber dome things..
While you have it apart clean ALL of the contacts! You may find a lot of screws to remove. Use a little segmented plastic tray to keep the screws in order and OBSERVE the lengths of each... sometimes they vary and you want to get the correct ones back in the same places.

Posted on Jul 29, 2009

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Paul Prestopino presto11@verizon.net

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