Disklavier

I thought that I would bring up this problem to see if there are any Piano
Techs that might know if the problem can be resolved.  I'm a Player Piano
Technician in Cupertino, CA.  I am not a Disklavier Tech, though.  I have a
friend who has an Upright Disklavier, piano model MX1OOIIXG, SN:  5561818.
I has very bad bobbling hammers right in the middle octave area of the
keyboard.  When played manually, there is absolutely no problem.  Everything
is regulated perfectly.  But the player action really has a problem.  The
local Disklavier Tech said there isn't much you can do about it and the
Yamaha Tech Support said almost the same thing.  It appears that the
solenoid is not going through it's complete motion to allow the hammer to
check properly.  This problem still occurred after the rubber tips had been
replaced in that area of the keyboard.  Are the heights of the solenoids
adjustable to eliminate this problem?



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Player Piano Forte
Bing Gibbs
10530 Barnhart Ct.
Cupertino, CA 95014
408-253-1866
binggib@...