Oberheim SEM based synths -1974 (SEM) 1975 (2, 4 voice ) 1977 (8 voice)    (4voice)Weight = 70.5 Lbs. Number manufactured = 800 MSR = $5690

User Manual: ersatzplanet
Reset Proceedures: N/A
Operating System code: N/A
Patches or knob settings: pmerecords.com Factory patches
Circuit Overview: below
Scematics/Service Manual: ersatzplanet
Common Service Issues/Tips:
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used:
General Info Links: Vintage Synth Explorer or Synth Learn

Circuit Overview:
     Analog subtractive with lots of parameters. Never had a chance to delve into these units. One of those holy grail things that sounds swell but tend to go for so much I'd build one before buying probably :-).

Service Tips:
     LOts of discrete circuitry. Anyone?

Let me know if you need anything.
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