Roland D-20 -1988    Weight=? Lbs. Number manufactured = MSR = $1795

User Manual: Roland US
Reset Proceedures: N/A
Operating System code:
MIDI or other control protocol:
Software related Links:
Patches or knob settings: Zicweb
Circuit Overview: below
Scematics/Service Manual: Senso's site
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used:
General Info Links: Vintage Synth Explorer or Harmony-central review

Circuit Overview:
     A downscaled D-50 (losing chorus and other fx, and pwm, but with 32 voices instead of 16 plus more samples. D20 adds 8 track sequencer also.

Service Tips:
     Other than key cleanings and some dirty buttons I haven't seen much trouble with these machines.

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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