A digital synthesizer with some nice analog modelling, enhancement of CS1x.
The key contacts went skitzy on mine already. I wound up painting them with the oaktree marketed mix. HOpefully it'll last.
While Yamaha normally does not keep parts around more than 5 years or so, some older ones can be gotten from NTS Pro Audio. Otherwise try your local Yamaha dealer or Service person.
Contact Sound Doctorin'