Roland JD-800/JD-990 -1991    Weight=33 Lbs. Number manufactured = ? MSR = $2895


User Manual: Roland US
Reset Proceedures:
Operating System code:
MIDI or other control protocol: See Manual
Software related Links:
Patches or knob settings: synthbase an uploadable database!
Circuit Overview: below
Scematics/Service Manual: fdiskc archive
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used:
Modifications:
General Info Links: Vintage Synth Explorer





Circuit Overview:
      NOthing analog here boys..but a great sounding unit. All hands on editing and a lot of similarities to D50 I guess with enhanced multi-mode filter modelling. I was blown away by these when they came out and hope to get one someday.

Service Tips:
     Anyone? Other than watch for dirty sliders obviously :-).

Parts:
Roland still stocks many parts for older instruments! You can always order them through your local Service Center and see what happens! Otherwise I have some parts also so don't hesitate to ask.
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