I would suspect that you have a problem with the key sensor assembly. The most likely cause is a faulty key emission circuit board (part number VZ141901), but there is also a key receive board, which may be causing the problem (part number VN244500). You need to contact Yamaha to order the parts, they may also be able to recommend someone who can carry out the repair.
BTW where are you located?
athomik
On Jun 5 2009, tillsbury2000 wrote:
>Ok, thanks for your help. All the MIDI settings are correct(otherwise it wouldn't be outputting only some specific notes and missing lots of them in between). Amazingly, although the floppy drive gave out about 10 years ago, I managed to find an old disk and write to it before the drive decided not to play ball any more!
>
>So, recording internally to the floppy gives the same result. For example, from middle C a scale of C records only C, E, and B -- reliably the same notes. A couple are missing from the next octave. Same throughout the keyboard (although possibly interesting is that there is a slightly higher proportion of missing notes in the centre of the keyboard compared with the extremes). They reliably don't fire, to floppy or to MIDI out. They were certainly working last time I used the piano, about four years ago. Since it's a sudden failure of a large number of keys (not a gradual breakdown), that's why I thought it might possibly be cable related. The LEDs on the sensors are all on, and the sensors are clean and visually perfect (no dust clogging or similar).
>
>Is there anyone who might be able to repair these, give an indication of who might be able to repair a disklavier, or know where spare parts can be found? Yamaha's service system over here seems to consist of a group of people who have no idea what a disklavier is, backed up by a group of people who assume that if you move house you're not entitled to take your piano with you, and treat you as if you've bought a grey import from some untrustworthy country such as Japan -- which is ironic considering where they're from...
>
>While disklaviers are great (when they work), I've never seen any company like it for leaving you in the lurch when it goes wrong. There's certainly a market for someone to produce a similar product and then support and service it properly.
>
>
>Charles
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