User Manual: Kawai US
Reset Proceedures: GM Reset: Push "PFRM/COMP" + "SYSTEM". Factory Reset: Push "SYSTEM" until displays shows "FACTORY RESET EXEC?=N/Y" then answer "YES" twice by dialing wheel to the right.
Operating System code:
MIDI or other control protocol: See Manual
Software related Links: Sound Quest
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual: ptr>Kawai
Common Service Issues/Tips: below
Parts Sources: Keys semiconductors misc
Uncommon chips/modules used: Many
General Info Links:
Your basic ROM sample based synth, thought 18bit. Somewhat less impressive sound wise though than some other kawai units from reviews and my memory of playing.
Most of the parts are going to be pretty hard to find I'd think on these and they're probably available too cheap to worry much about it. :-)