MX80 Disklavier questions

[James Grebe]

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Hi,
Steinway almost works the same way. but we still service them.  =
Sometimes we give better service than the dealer, I really mean  most of =
the time, because it is our personal name that goes along with our =
service.
Jim
James Grebe
Piano-Forte Tuning & Repair
Artisan of Wood
WWW.JamesGrebe.com
1526 Raspberry Lane
Arnold, MO 63010
pianoman@accessus.net
  ----- Original Message -----=20
  From: D.L. Bullock=20
  To: PTG ; Piannaman@aol.com=20
  Sent: Thursday, April 08, 2004 8:39 AM
  Subject: RE: MX80 Disklavier questions


  Don't expect Yamaha to give you anything helpful.  They live in the =
land where only Yamaha trained techs work on Yamahas and only Disklavier =
techs work on Disklavier.  You will be required to take their Disklavier =
course before they will allow you to even open the thing (as you have =
already done).  I have installed every compu-player made so far and they =
would not give me the time of day because I do not work for an =
authorized Yamaha dealer.

  D.L. Bullock    St. Louis
  www.thepianoworld.com =20

   -----Original Message-----
  From: Piannaman@aol.com [mailto:Piannaman@aol.com]
  Sent: Wednesday, April 07, 2004 11:06 PM
  To: pianotech@ptg.org
  Subject: MX80 Disklavier questions



    Howdy folks,=20

    I got a call to tune a Yamaha MX80 with Disklavier that plays =
continuously in a Chinese restaurant.  I tuned it last year, and it had =
no real problems to speak of.  When I walked in, my contact told me that =
it "makes a real funny noise, like it's hitting on wood."  I tuned it(it =
was at pitch, and in remarkably good tune all things considered), and =
noticed alot of bubbling hammers.  Keydip was shy almost 2 mm from the =
factory spec of 10 mm.=20

    I am not that familiar with the workings of these players.  In a =
standard piano, I'd either shim the balance rail or take out paper or =
cardboard punchings from the front rail to increase aftertouch.  What =
stopped me from doing that was the square metal tab that protrudes from =
the bottom of the key and slips into a sensor slot on the keybed.  I =
have no desire to alter the depth of travel and possibly alter the =
elecronic end of the instrument.  Does anyone have experience with this =
problem with these instruments?=20

    I never did find the woody sound while tuning the piano, but as soon =
as I turned on the player mechanism, there it was, a really loud, =
obnoxious clack everytime F4 was played.  It didn't take long to figure =
out that it was the solenoid knocking against the metal that covers all =
of the solenoids.  I pulled up on it manually, and it was noisy; it was =
the only solenoid that made the noise.  I'm assuming that a grommet or =
rubber washer of some sort is missing, but I did not have time to take =
out all of the keys, remove the cover, and find out what was amiss.  Nor =
did I have whatever part I might have needed.=20

    I noticed how much the keys were lifted above the balance rail by =
the solenoids, so I did a quick fix and lowered the adjustable metal =
key-stop rail to limit the travel to the point where the solenoid would =
not max out.  I know this is probably a short term solution.  I would =
certainly appreciate any advice, information, and general wisdom about =
either or both of these problems.=20

    I have not called Yamaha yet, but are they likely to be forthcoming =
with a tech manual on this, or is there one online somewhere that =
someone could direct me towards?=20

    Thanks in advance,=20

    Dave Stahl 
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