Disklavier

Robert,

In an e-mail sent yesterday, I described how very very slight sanding of
the solenoid plungers in my DC3IIXG ended all problems with sticking
keys.  I have over 50 Yamaha Pianosoft and Pianosoft Plus disks.  Only a
very few of these disks produced the sticking key problem.  In every
single case, the problem of sticking keys occurred when the left-most
pedal was activated in the software to produce a shift in the keyboard.
The problem was repeatable.  By this I mean that every time that these
songs were played, I would have keys stuck down at the end of the piece
and they were always the same keys for that piece, i.e. different pieces
resulting in different stuck keys throughout the full range of the
keyboard, but any given piece causing the problem always resulted in the
same stuck keys.  Sanding the solenoids as I described in yesterday's
e-mail has completely eliminated the problem.  I can play any piece,
whether it uses the shift pedal or not, and no keys stick at the end of
the piece.

Tom

P.S. I would caution anyone thinking of applying this procedure, i.e.
sanding the solenoid plungers in their disklavier grand piano, that this
is a job for a Yamaha trained technician.  I would never have dreamed of
doing this on my own.