User Manual: VSE or Roland US
Operating System code:
MIDI or other control protocol:
Software related Links:
Patches or knob settings: Planet Groove
Circuit Overview: below
Common Service Issues/Tips: below
Parts Sources: Keys except JV80 JV80 Weighted Keys knobs semiconductors misc
Uncommon chips/modules used: Many
General Info Links: Sound on Sound review or Vintage Synth Explorer
Rom based digital synths with various expansion options and 28 note polyphony usually it appears. Fairly limited facilities but some nice sounds.
Not aware of any issues on these.
Roland may still have some parts for these.