[CAUT] Yamaha Disklavier De-tunes itself

[David Ilvedson]

Wouldn't Yamaha be able to answer these questions?   1-(800)854-1569



David Ilvedson, RPT

Pacifica, CA 94044









Original message

From: "Annie Grieshop" 

To: "College and University Technicians" 

Received: 10/15/2007 7:17:26 AM

Subject: Re: [CAUT] Yamaha Disklavier De-tunes itself





So, are the power supplies not supposed to be noticeably warm if the system is in standby mode?  



Like Jeremy, I have run into a grand that seems to untune itself, particularly in the mid-section, and had wondered if the heat generated by the power supply could be to blame.  If the system had been playing, I could understand why it was so warm -- but in standby, I would expect it to be cool.



Thanks,

Annie Grieshop  

-----Original Message-----

From: Ken Zahringer [mailto:ZahringerK at missouri.edu]

Sent: Monday, October 15, 2007 8:27 AM

To: College and University Technicians

Subject: Re: [CAUT] Yamaha Disklavier De-tunes itself





Hey, Jeremy,



We have 23 Disklaviers here and I have never noticed anything like this.  Sounds like you may have a power supply problem.  You should call Yamaha tech support and talk to them about this.  They’re at 800-854-1569.



Regards,

Ken Z.





On 10/13/07 1:51 PM, "Jeremy Gould" <jeremygould at bsn1.net> wrote:





List,



A little over two years ago, the University of Northern Colorado was given a gift of a Yamaha C6 Disklavier (well...the school paid for half, but that's another story).  Needless to say, the player system was never used.  The piano lived in a large classroom/performance space and had weathered it's first two years of University life quite well.



After my resignation last year, our jazz piano faculty requested the piano be placed in his studio so that he could make use of all the bells and whistles.  So, in August, the piano was placed in his studio.  



Last week, I get a call saying that he doesn't know what has happened, but his piano tuning has gone way south.  So, I go to check it out, and find the treble pretty much on target but the entire mid-section has gone really flat.  So, as I am preparing to tune I hit my left knee on the console under the keybed...ouch!  So, I look down and the player system is on.  I turn it off and feel that it is quite warm.  Hmmm...I wonder if the electronics underneath are warm too.  Sure enough, thing has an I/O unit (don't ask me what that is) mounted directly under the bridge and the thing is downright hot!  I reach my fingers up in the 1" space between the soundboard and the unit and sure enough, the sound board is quite warm.  So I did a quick tuning and left a note saying that the player system is to blame for the wonky tuning, and that I'll check if this is a normal issue with these systems and in the meantime, leave it turned off when not in use.



So, is this common?  What do I do to keep the piano from going out of tune every time the system is turned on?  Or should I have him leave the thing turned on and let the soundboard simmer?  Any advice will be much appreciated.

 

Jeremy Gould





-- 

Ken Zahringer, RPT

University of Missouri

School of Music
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