Disklavier

Bob,

I agree with Pianobench's comments in his response to you. This is 
definitely a problem that a qualified Yamaha technician should be able 
to solve.  The behavior that you are seeing is not normal for the Mark 
IV and I do not see this at all on my DC3M4t. 

I can understand your desire to protect your Mark IV from electrical 
surges, but I don't think that plugging in and unplugging the Mark IV 
frequently (which requires the Mark IV to reboot each time it is used) 
is the solution.  I would strongly suggest that you purchase a good UPS 
which will protect your Mark IV from power surges, plug the Mark IV into 
a battery backed up outlet on the UPS, and when you have finished 
playing the Mark IV, place it into the sleep mode (green light dimmed) 
and leave it in that state.  This will be, over the long haul, much 
easier on your Mark IV than the constant booting and rebooting. 

I have my Mark IV plugged into a good UPS and I cannot imagine owning 
this instrument without protecting it from power surges with a UPS. 

Tom

Bob Colopy wrote:

> Tom,
>
> I'm not a pianist just love the piano and so play midi files. The last 
> 4 or 5 times I have had company over it has spoiled my "show-off" 
> performance by playing F below middle C randomly and much louder than 
> the rest of the piece during playback - no matter what files I use, 
> including the pieces that come with the piano. However, I can correct 
> the problem by rebooting the system and being very careful on the 
> timing of when I turn on the small remote. But usually when company 
> comes I'm busy hosting so cannot wait and watch for the precise second 
> or two after the green light is on solid and before it dims. If I miss 
> that time slot it does its random note thing which of course is 
> embarrassing for me when trying to demonstrate how great the piano is.
>
> I called technical support who have been excellent. They said it is 
> like any computer even though this is running the Lynx system. When 
> have problems, just reboot. Usually I don't have time with company so 
> just hope they don't notice the random notes but sometimes it is so 
> obvious and I have to explain what happened and that it is not normal 
> e.g. I didn't follow the precise timing on turning on the remote. If 
> I'm the only one with this problem then probably it is not the 
> computer but something to do with cross talk to that particular 
> solenoid. But if that is the case then how come I can avoid the random 
> notes with precise timing when turning on the remote?
>
> I normally keep this expensive piano unplugged so there is no chance 
> that lightning could damage the electronics. It is only plugged in 
> just before I use it - don't know if that has any bearing on it.
>
> Thank you,
>
> Bob
>
>