Hi,
to get into the maintenance mode, hold down both SONG SELECT buttons ( |<< & >>| ) while powering up.
Press (+) 5 times to get to "KEYBOARD MEASUREMENT".
Press "PLAY/PAUSE". It should say "ARE YOU SURE?
Press "PLAY/PAUSE" again.
The piano will start playing by itself. While it does so (15-20 mins), don't touch the keys, whatever you do. It will then calculate the piano tables. Once it is finished, it will come up with "OK" (if you're lucky) or it will show "PASSxxx)", which indicates that there is a problem with one or more keys (xxx indicates the key number).
You can compensate for individual keys by following the above procedure, but only press the (+) button twice to go to "KEYBOARD ADJUSTMENT". The piano will then start playing a chromatic scale. When it gets to the note which is causing problems, press the "PLAY/PAUSE" button. You can then use the "R" button and the "L" button respectively to increase or decrease the velocity.
If you find that the pass numbers indicate a continous range of keys, rather than individual ones, you may need to physically adjust the sensor rails. At this stage, it might be best to get the service manual and the maintenance manual to give you mor details, or call your local Yamaha service/tech support department.
Compared to later Disklavier models, you have picked the most difficult model as an introduction to the Disklavier. However, if the regulation is up to scratch, it is possible to get these pianos working OK, it's just a bit fiddley and time consuming.
On another note, if you have electronic problems with the original (Wagon Grand) disklaviers, Yamaha in Japan are getting to the point where electronic spares are no longer available (this series was discontinued in 1992)
Adrian Thomas
On Mar 7 2007, Colin wrote:
>Hi all,
>
>I am new to the group and
this is my first post. I have a pretty
>high level of technical
skill when it comes to piano action work,
>tuning and voicing,
but I am new to Disklaviers.
>
>I have a 1990 C-3 Wagon
grand from japan that I picked up very
>inexpensively and after
having done a little regulation work (very
>minor did'nt need
much even though its 17 years old! Go Yamaha!) and
>some voicing
(was a bit bright, now sounds like a mason and
>hamlin) , I would
like to run the automatic calibration on the
>disklavier unit as
I am sure it hasnt been done in a long time.
>
>What is
the sequence to get the unit to "boot" in to maintenance
>mode?
>
>The menus are in Kanji, but I have a close
family friend that is
>japanese to translate so I should be able
to get through it.
>
>Any help would be appreciated.
>
>Thanks,
>
>-C
>
>
>