Disklavier

Hi Bill

 

Thanks for your detailed reply.

 

I have carried out the tasks you set and the pedals worked flawlessly.  

 

The piano in 9 months old - purchased March 2013 from a Yamaha Australia
dealer.  The serial no. is 6338593.  I would be interested to know when it
was manufactured.

The problem only occurred yesterday when I was playing around with
DKVBrowser.  After the comment in these pages "The best software since the
dawn of time", I thought I should check it out some more.  The only files I
played were those demo and sample files which came with the DKV (I retain
all my music files on a laptop which I connect to the DKV wirelessly via
USB).  In doing that the pedals stopped working 3 times.  The first time I
completely powered down and fixed it.  The 2nd and 3rd times, going to
standby was sufficient.

The piano has the latest operating system and was calibrated when new. I
think the pedal problem I experienced yesterday will remain a mystery.

 

Another question, if I may:  How often should a full keyboard calibration be
done?  I have the full service manual and have previously done a full
calibration myself.

 

Kind regards

 

Geoff

 

 

 

 

  _____  

From: disklavier@yahoogroups.com [mailto:disklavier@yahoogroups.com] On
Behalf Of Bill Brandom
Sent: Sunday, 29 December 2013 6:00 AM
To: disklavier@yahoogroups.com
Subject: Re: [disklavier] Pedals not working

 

  

Hi Geoff,

 

I am sorry to hear about the problems you explained in your email. If your
pedals are failing as often as you say, then you have a hardware problem.
Having your pedals quit 3 times an hour is NOT the norm with the Disklavier
Mark IV and is a problem that needs to be corrected. The problem I described
in an earlier post is something that occurs after leaving the Disklavier on
for long periods of time (typically longer than 2 weeks.) This problem is
corrected by doing a complete power down, disconnecting it from power and
letting it "rest" for 30 minutes or more. Through the years of Mark IV
production, this problem was pretty much solved, but not totally eliminated.
I have found that if I go through this power down procedure about once a
week, then I never have a pedal playback problem.

 

Lets troubleshoot this a little bit. How old is your piano? If you are not
sure, give me the serial number of the piano (a seven digit number on the
plate or harp) located under the treble end of the music desk. How long has
this problem been happening? Have you reported this problem to Yamaha? If
so, what was recommended and what was the result? When was the last time you
had the piano calibrated? Has your piano been updated to the latest
operating system?

 

If I was there, I would try the following. Normally this is done by a
Disklavier technician, but if you are careful, you can do it yourself. Power
down the piano again and disconnect it from power. On the back side of the
key drive unit under the treble end of the piano, you will find a box that
contains the CSP (Central Signal Processor) board. There are a number of RCA
connections to this box. Disconnect and re-insert the the two connectors
labeled TO I/O BLUE and GREEN. Disconnect and re-insert the connector
labeled TO PD. Go to the I/O unit and disconnect and re-insert the BLUE and
GREEN connectors located on one end of the I/O Center above the LAN
connector.

 

Plug the piano back into the A/C and power back up. Record a two minute song
of playing the damper pedal and shift pedal (right and left pedals),
depressing each pedal every two seconds. Then, play this song back 4 or 5
times. If the pedals continue to work, then play your music as you normally
do and see if the pedals continue playing or not.

 

Let me know the results. Hopefully, your pedal issue is solved.

 

Bill

 

On Fri, Dec 27, 2013 at 7:27 PM, <gward1211@...> wrote:

  

Hi Bill

 

I also have a Mk IV  (C3 DKV).  I experience the pedal problem often, 3
times in the space of an hour when playing files on the HDD through
DKVBrowser.  I can fix it simply by going to standby mode and on again.  I
rarely have the problem when playing midi files from my laptop using
VanBasco's Karaoke Player.

 

I power down and turn the power off at the wall socket every night.

 

This seems to be an identifiable and common bug affecting a lot of users -
probably every Mk IV user.  Do you know why Yamaha doesn't  put out a fix
for it?

 

Many thanks for your knowledge, wisdom and help in these pages.

Geoff

 

Long live Disklavier