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|Subject: "Strange" failures in aging Pianocorder|
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Date Posted: 10:14:58 02/16/08 Sat
My Pianocorder stopped operating the soft pedal last week. The fault turned out to be in the connector which plugs onto the power supply printed circuit board.
A year or two ago, one of the note driver boards stopped working for no apparent reason. The cause was similar -- a poor connection at the center driver board where the +170 volts is fed to the 32-note driver boards.
I suspect that the problem originates with cheap, shoddy construction using contact material which loses spring tension over time. That tension is needed to maintain a gas tight contact with the pins on the printed circuit boards.
Hopefully this will save someone's head of hair when frustration sets in.
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