Disklavier

Hi Ste,


I do not believe it is possible to use a Mark III control unit with an MX100A, MX100B, MX80 or Wagon Grand. However, the question has never come up before. The Mark III system is considerably different than the earlier systems (control, sensing, drive system, power supply), as a result I don't think it is possible. I can probably supply you the service manuals for both the MX100A and MarkIII. If you think the information will be helpful. Let me know if you want them and I will send them to you privately.


There is a TEST mode in the MX100A  but no MAINTENANCE mode. Test mode allows you to test the various electric/electronics in the system. The service manual will show you how to access these tests.


A Yamaha silent bar is not available as an add-on unit. It may be possible to install one of the other company's silent systems in your piano. I do not know if it has ever been done with a MX100A so I cannot make any recommendations on this issue.



Bill



-----Original Message-----
From: George Frederick Litterst <PianoBench@...>
To: disklavier <disklavier@yahoogroups.com>
Sent: Fri, Mar 7, 2014 8:17 am
Subject: Re: [disklavier] mx100a problems and questions/suggestions


 
  
    
                  
Hi, again, Ste.


Bill Brandom is the real technical expert who can comment on the component level issues. He was the head of Yamaha Piano Service for many years. I anticipate a negative reply to the question of replacing an MX100AorB control unit with a control unit from a Mark III. Of course it would be a stunning discovery if someone could make all of the necessary component adjustments for this to work!


Every Disklavier has built-in calibration programs that are normally accessible only by a piano technician. I don't recall how those programs work on your vintage instrument. I doubt that a Mark III control unit would have calibration programs that would work with your vintage instrument.


I don't have any experience with third-party mute rails. If that was really important to me, I would look into trading my instrument in on a Mark IIXG or Mark III upright that has the mute rail. Those instruments  don't require a working floppy drive in order to use MIDI. They also respond to incremental pedal data. Lastly, if you ever desire it, they can be upgraded with a clean replacement of the control unit using a DKC-850.


Another reason to use a Yamaha Disklavier with a factory-installed mute rail is that the instrument has a matching piano sample.


Regards,
PianoBench


On Mar 7, 2014, at 9:16 AM, <steno7777@...> <steno7777@...> wrote:


 
     
Thank you very much for your detailed answer !Yes, if i connect them separately (midi in and out) and disconnetting the other connector everything works fine...yes you are right perhaps there are some midi loops somewhere...i will Have to double check. About the mod , i would really like to Have a way to Have midi without having to use the floppy disk , if it's possible. That Because , in case floppy disk drive will be damaged in the future i cannot use midi any more and that's sad!It's a non-sense in my opinion trying to add the dkc850 if i cannot get rid of the "floppy-thing" inside the main unit. I wanted to use Disklavier Mark3 module (trying to adapt it to mx100) just because i can take it almost for free from a friend upgrading to dkc850 of his mark3. Perhaps we need to do the proper cabling adapting it...we would need service manual for mark3 perhaps to see if voltages / signal are compatibile (NOT passig through midi connectors i mean)You seem to be very expert about piano Disklavier models! That's Great! Thanks a lot really! Do you know if there is a procedure to do a complete self test of the Disklavier to see if Its functionality is 100% everywhere in all Its parts ?I would also like to add the silent bar, if possible , replacing the "mute" rail , controller by central pedal. If anyone has any suggestion will be appreciated! (I Made a post for that).Thanks!Ste