Disklavier

Not DKV exactly, but I'm curious about this: My brother (who gave me one of his DKVs), bought an NU1 last year. He told me it was out of tune when he got it - which seemed impossible to me as its a sampled piano with an acoustic action. He has perfect pitch, so I assumed he was just super-sensitive to non-perfect samples.

Yamaha sent a tech to his house, who said "the sensors were dirty", and repaired (cleaned?) them.My brother reports the piano now sounds totally different, pitch is perfect. 

My question - what do sensors have to do with pitch? I can see volume/velocity issues, but pitch? I'd appreciate any explanation or ideas.


Sam 
www.keyboardcollective.com






> On Oct 17, 2014, at 6:09 PM, mangez@... [disklavier] <disklavier@yahoogroups.com> wrote:
> 
> It may also be due to a fault around the key/pedal solenoids which causes the key/pedal drive supply to shut down. ( Sticky or dirty solenoid, solenoid drive transistor breaking down when it gets hot or calibration problem).
> 
> Adrian Thomas Music Services
> www.adrianthomas.net
> 
> On Oct 17 2014, Bill Brandom bill.brandom03@gmail.com [disklavier] wrote: 
> 
> Power supply in the piano, not the control unit itself.
> 
> Bill
> 
>  iPhone
> 
> On Oct 17, 2014, at 11:22 AM, 'Jon Arnold' jonarnold@... [disklavier] wrote:
> 
> For now, I have given up on trying to make the DKC850 work with my piano, so I am back to the 100R.
> 
> 
> 
> But now (and this might have been a big part of the problem in trying to run the 850 through the 100R, per my Yahama dealer’s suggestion), it plays for a couple of minutes then a message appears on the display as the music stops that says:
> 
> 
> 
> Piano Power Off! (01:55)
> 
> (PWM OVER) _ ESBL
> 
> 
> 
> That is pretty much verbatim. The guy that came out from the Yamaha dealer (*NOT* a disklavier tech) said that it sounds like there is a problem in the power circuitry INSIDE THE PIANO, as opposed to inside the 100R.
> 
> 
> 
> Can anyone clarify or make suggestions?
> 
> 
> 
> 
>