Oberheim OB-1 -1977    Weight = 11 Lbs. Number manufactured = ? MSR = $1895 (1496 ad photo)

User Manual:
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 sheet
Circuit Overview: below
Scematics/Service Manual: electrongate pages or synthfool
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used:CA3086, CA3080
General Info Links: VSE

Circuit Overview:
     Analog subtractive monophonic. First to have actual patch storage!

Service Tips:

I probably have most of the chips in these or can direct you.
Contact Sound Doctorin'