Disklavier

The reason I asked if it was a grand piano is that the only time I have seen this error message when a Disklavier grand was recently moved.  There is a round connector with several pins that connects the pedal lyre with the rest of the piano.  It has a round collet which is to screw to untighten or tighten that cable.  Unfortunately, an experienced mover would try to turn the whole thing and mess up the pins inside.  Once the collet is loosened, the conector should be pulled down and not twisted to disconnect the pedal lyre from the piano.   Fortunately when I did this repair years ago, the cable was an available part.  The entire pedal assembly needs to be taken apart to replace the cable.  Hopefully Bill Brandon will chime in here to confirm (or not!) this problem.  You might crawl under the piano yourself and disconnect this cable the proper way and check the pins.  Once I had this problem because the cable LOOKED like it was properly attached but it was not!  Like most things electronic, disconnect, reconnect and try again!

Carol

> On Dec 30, 2014, at 2:42 PM, Brad Harper bharper33@... [disklavier] <disklavier@yahoogroups.com> wrote:
> 
> 
> 
> Spencer,
> 
> Thanks for the encouragement, as well as your contributions to recovering many past performance titles.  Our community of piano performance enthusiasts is a small one, but with many people that freely share experience, and many hours of work in preserving performance art.  The task of recovering old paper piano rolls, and converting them to midi, allows other artists to build on the piece, and add full orchestration.  Also, then being able to print the musical score, as it was initially performed is a step toward preserving the past.  As these methods get better and better, it is amazing to have Gershwin perform on your piano, in your own living room, with a nuance that only he could provide.
> 
> Brad…
> 
> From: "Spencer Chase lists@spencerserolls.com <mailto:lists@...> [disklavier]" <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
> Reply-To: <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
> Date: Tuesday, December 30, 2014 at 1:46 PM
> To: <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
> Subject: Re: [disklavier] Service Manual and Schematics for MarkII DKC100R
> 
> Brad,
> 
> good luck. i often find myself in similar positions. i am very good with electronics, about 40 years experience and have even kept up with modern methods. i can fix pretty much anything and can read all but the worst schematics. the problem is that companies like Yamaha tend to keep this information to themselves. there are plenty of companies  who see the benefit to both customers and to their company, to freely share this information. my guess is that Yamaha will never be one of these companies but i would certainly like to be proven wrong.
> 
> 
> On 12/30/2014 10:33 AM, Brad Harper bharper33@... <mailto:bharper33@...m> [disklavier] wrote:
>>  
>> Carol,
>> 
>> A little more background.  This problem has gotten worse over the last 10 Months.  When the problem first started, the piano would play for about 40 Minutes, before the problem occurred.  I could actually play an entire Pianosoft diskette before it started happening.  Around this time, I also upgraded the firmware in the DKC100R controller, because it would not read IBM formatted diskettes.  The firmware fixed that problem, after a couple tries(bad firmware on the shelf).  I started using the system more because I could buy titles that I could download from Yamaha and play.  My system has the MU50 sound module as well.  The problem slowly got worse, with shorter and shorter play times, before the error occurred. Now the system will fault at the first song on a disk.
>> 
>> I took the cover off the foot pedal solenoid mechanism, and disconnected the solenoids, but same issue.  Watching the solenoids, it seems like the power to them is weak, as the sustain solenoid, only actuated about half of it’s travel.  I disconnected the linkages, and it would travel the whole distance.  Still no help, about 30 seconds of song play.  
>> 
>> I truly think the power supply is not working up to capacity, and then causing the shutdown.  That is why I am looking for a schematic, and service manual, so I can test it, and see if it needs to be reworked.
>> 
>> The power supply is not an in-expensive item, and I don’t want to replace it, unless I know it is the cause of the problem.  Also I would much rather fix than replace.  I have a background in electronics, so I have no problem tackling the repair, but I prefer to not do it blindly.  A schematic, with test voltages, and testing points, as well as a history of common failures would be of great assistance.  Since I retired, I watch how I spend a lot more carefully.  I don’t want to just parts swap for the purpose of troubleshooting.  I want to make sure that what I buy will solve the problem.
>> 
>> Brad 
>> 
>> From: "Brad Harper bharper33@... <mailto:bharper33@...> [disklavier]" <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
>> Reply-To: <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
>> Date: Tuesday, December 30, 2014 at 11:54 AM
>> To: <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
>> Subject: Re: [disklavier] Service Manual and Schematics for MarkII DKC100R
>> 
>>  
>> Thanks Carol,
>> 
>> Could this have been caused by moving the piano to a new location?  I did not have this problem until the piano was moved.  It was in storage for about 6 months.
>> 
>> This link does not contain a Service manual though, is there still one more manual?
>> 
>> Thanks again… Brad
>> From: "Carol Beigel carol@... <mailto:carol@carolrpt.com> [disklavier]" <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
>> Reply-To: <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
>> Date: Tuesday, December 30, 2014 at 10:46 AM
>> To: <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>>
>> Subject: Re: [disklavier] Service Manual and Schematics for MarkII DKC100R
>> 
>>  
>> This could be a damper pedal solenoid out of adjustment.  When it  heats up it shuts down the entire system.  If it was a power supply it probably would not start to play at all.  An experienced Disklavier tech is best equipped to make this adjustment.  Otherwise you will find it in the service manual or the maintenance manual instructions how to do this.
>> 
>> 
>> Carol Beigel
>> 
>>> On Dec 30, 2014, at 8:15 AM, 'MixMeisterBob' mixmeisterbob@... <mailto:mixmeisterbob@...> [disklavier] <disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>> wrote:
>>> 
>>> 
>>> 
>>> http://yamahaden.com/resources-2/item/281-mark-ii-manual <http://yamahaden.com/resources-2/item/281-mark-ii-manual>
>>>  
>>> From: disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com> [mailto:disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>] 
>>> Sent: Tuesday, December 30, 2014 2:36 AM
>>> To: disklavier@yahoogroups.com <mailto:disklavier@yahoogroups.com>
>>> Subject: [disklavier] Service Manual and Schematics for MarkII DKC100R
>>>  
>>>   
>>> Hi All,
>>>  
>>> I am looking for a Service Manual and Schematics for MarkII DKC100R
>>>  
>>> I am Having a “PWM over” error, shortly after starting playback, so I am looking for a Service Manual with Schematics for the Solenoid Power supply, and any good advice on tests, and what to look for.
>>>  
>>> That’s a good starter discussion.
>>>  
>>> Thanks for your Help… Brad
>>> Brad Harper
>>> Bharper33@... <mailto:Bharper33@...>
>>> 
>>> 
>> 
> 
> -- 
> 
> Best regards, Spencer Chase
> 67550-Bell Springs Rd.
> Garberville, CA 95542 Postal service only.
> Laytonville, CA 95454 UPS only.
> Spencer@... <mailto:Spencer@...>http://www.spencerserolls.com <http://www.spencerserolls.com/>
> (425) 791-0309
> 
> 
> 
>