A digital samling synthesizer. Similar to EMAX and other units of the day. 12 bit with 2.8" drive. This one uses switched capacitor filter MF6CN for each voice and one MF10CCN probably as an overall clock elimination filter.
The bushings will tend to be rotted out from what I've seen causing clunky key sounds. Kawai has these parts and possibly Akai still sells them probably at a higher price. Anyway these don't sell for a lot (under 100 dollars usually) so don't spend a lot of time on them in general. I see a few with broken disk drives having gone on ebay of late. I have no disks to test the one I have here. I think I'll possibly scrap it just because of the hours that would have to be put into restoring the key movement to make it worth anything really.
Let me know if you need a specific part from my listings in the parts section.
Contact Sound Doctorin'