Message
Re: [disklavier] Minor Mark IV issues
2010-12-07 by athomik
athomik
On Dec 6 2010, George F. Litterst wrote:
>Good afternoon, Don.
>
>The issue that you describe is a known issue of the Mark IV. Sometimes a restart fixes the problem, sometimes a cold reboot is necessary. My understanding is that a cold reboot can involve unplugging the instrument for as long as 40 minutes.
>
>Although the problem is known to Yamaha, a timetable for a fix has not been announced, to my knowledge.
>
>Regards,
>PianoBench
There has been a hardware fix to correct reboot problems, one since 2006, one since January 2008. There are 2 circuit boards in the I/O Centre which may need to be changed. This applies to pianos earlier than serial number 6154000. If your piano is later than this, but earlier than 6204281, only one board would need to be changed. (this is assuming that there isn't an underlying fault unrelated to the issues addressed by these modifications). As far as locking up goes, update the piano to the latest version of software and don't forget to do the "Recall Demo Album" procedure after you have finished the "Interface Updater".