<html> <body> Dave, <x-tab>        </x-tab>Some brief observations. 1st these regulate just like a normal grand action once you remove the electronic rails and such. Be careful which screws you remove to remove rails or you could be cranking screws that are for adjustment of the rails. It's not real hard to figure out which is which but do allow for more time if this is the first you've seen of them.  It sounds as though you've found the problem likely6 exacerbated or even caused by the incorrect dip. Look hard to see what may have caused this. The old Wagon grand I service from time to time seems rather solid in it's regulation and as you've noticed, tuning. It too is played all day every day and yet is rather solid in it's performance not showing a great deal of wear with it's high degree of usage. <x-tab>        </x-tab>Once you are done with a normal grand regulation you can follow menu screens to where the player mechanism will regulate itself to the new condition of the grand action. This is noisy and probably not be done with paying customers around. The player does a fine job of adapting itself to the condition of the action and can even tell you on which notes that your action regulation wasn't quite up to snuff. Since it seems that this piano has never had the Disklavier service that it requires. I would recommend that you study up and give it that service if you can or send someone out who will. Don't forget that the pedal solenoid adjustments are among the most important for the unit. Once these pianos are all dialed in they perform marvelously and almost flawlessly for a very long time in my experience. Good Luck! Greg Newell At 12:05 AM 4/8/2004, you wrote: <blockquote type=cite class=cite cite>Howd= y folks, 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. 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? 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. 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. 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? Thanks in advance, Dave Stahl </blockquote> <x-sigsep></x-sigsep> Greg Newell Greg's piano Forté <a href="mailto:gnewell@ameritech.net"= eudora="autourl">mailto:gnewell@ameritech.net</a></body> </html>