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
Scematics/Service Manual:
Service pics:
Common Service Issues/Tips: below
Parts Sources: Keys except JV80 JV80 Weighted Keys knobs semiconductors misc
Uncommon chips/modules used: Many
Modifications:
General Info Links: Sound on Sound review or Vintage Synth Explorer
Circuit Overview:
Rom based digital synths with various expansion options and 28 note polyphony usually it appears. Fairly limited facilities but some nice sounds.
Service Tips:
Not aware of any issues on these.
Parts:
Roland may still have some parts for these.