Korg MS-20 -1978    Weight = 16.5 Lbs. Number mfg.= 20,000 MRP=$850

User Manual: korganalogue.net
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings: Patch Sheets or Settings
Circuit Overview: below
Scematics/Service Manual: fdiskc archive or Hylander
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: 2- Korg 35 VCF (high and low pass)
General Info Links: Vintage Synth Explorer

Circuit Overview:
     I'll brush up on this when I get time..

Service Tips:

I believe you'll draw mostly blank looks from Korg on these units. I have some parts that are the same so feel free to ask what the current stock is on a given thing. Some of the less common parts are getting quite hard to find though. THings pop up on ebay now and then.. Contact me.