The loud pedal adjustment procedure involves more than what your tech
apparently did. Yamaha's maintenance procedures have been detailed on a
2002 CD-ROM titled, "Hybrid Piano Service CD." I don't know that this
CD has been updated for the Mark IV, but Yamaha has surely documented
the procedure.
To troubleshoot your problem, the complete performance of this procedure
is a must.
In general, the adjustment includes the following steps in this order:
* Adjust the solenoid gap.
* Adjust lost motion. (It sounds as though your tech did that.)
* Adjust the pedal stop.
* Put the DKV in the Maintenance Mode and perform the pedal calibration
and adjustment of the half-pedal point.
You might consider contacting Yamaha for help in locating a qualified
Yamaha-trained technician in your area.
On the Mark II, and surely on the Mark IV, there is a demonstration
piece in ROM, Schumann's Traumerei, beautifully pedaled, which should
play perfectly when the adjustment has been properly completed. A wise
technician would demonstrate his work to you by playing this piece to
assure you that he did properly adjust the pedal.
Wise, because many MIDI performances do play on a perfectly adjusted
Disklavier with a terrible thump. Some files, even older PianoSoft
disks that are still offered today, have on/off sustain pedaling, rather
than continuous pedaling, that thump when the damper assembly drops from
the full-open to the released position. Thumping can also occur when the
pianist records and drops the dampers fully and abruptly.
In other words, the problem you are experiencing could be caused by the
file(s) you are playing.
As you probably know, the MIDI values of a released and fully open pedal
are 0 and 127. I have had some success in mitigating the thump of
problematic files by limiting that range to about 25 to 90. On my Mark
II instrument, a value of 25 is still fully damped and at 90, completely
undamped. Of course, that means that the pedal solenoid is energized
throughout the playing piece--a condition that might occur when a
skilled artist records. I have had no problems with the solenoid
overheating.
jaallc wrote:
>Anyone out there have a Mark IV? My right pedal seems very
>noisy to me, I can hear it thumping throughout the song (each
>time it is pressed). It also makes a noticeable noise, beyond
>a thumb, almost as if a quiet clapping noise. My dealer has
>already been out and made some adjustments, but it's not really
>any better. I'm wondering if this is normal or if these pedals
>are supposed to be perfectly quiet?
>
>Incidentally, the tech who came out complained that Yamaha gives
>them no training, that they have to call Yamaha for anything but
>the most basic problems. Didn't exactly inspire confidence. The
>only adjustments he made to my pedal were to two washers on the
>top and bottom of the pole itself, surely there is more that can
>be done than this?
>
>Regards,
>Jason
>
>
>
>
>To Post a message to the group, send it to: disklavier@...
>
>To Post a private message to Todd Muncy, the group's founder and moderator, send it to:
>disklavier-owner@...
>
>To reach our group's web site go to:
>http://Yahoogroups.com/group/disklavier
>
>Todd's family web site was completely updated 012/22/03. It contains some fun disklavier content and links to midi sites among many other things, The url is:
>http://MuncyFamily.com
>
>THINKING OF LEAVING THE GROUP?
>If you are thinking of unsubcribing because you are getting too much mail, go the the web site and change your email delivery option instead. That will fix the problem, while maintaining your access to the group. If you insist on leaving us completely send a blank email to:
>disklavier-unsubscribe@...
>
>Know someone who wants to join? Have them send a blank email to:
>disklavier-subscribe@... or give them this link:
>http://Yahoogroups.com/group/disklavier/join
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
--
Robert Welcyng
Anchorage, Alaska