Yamaha SY-1/2 -1974

User Manual: Yamaha
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:
Circuit Overview: below
Scematics/Service Manual: fdiskc archive SY-2 or David Rogoff's site (A great manual. Thorough study of circuits! )
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used:CA3080
General Info Links: Vintage Synth Explorer

Circuit Overview:
     A simple subtractive analog synth with preset ROM control matrix like ARP pro-soloist in many ways. Aftertouch can control various parameters and 1 vco, 1 lfo.

Service Tips:
     Richard Atkinson reports that he had an offset voltage develop out of one of the potted modules on his SY2. He installed a capacitor to pass signal and block the DC offset and restored the output to normalcy.

I believe I should have most electronic parts for these. Yamaha does not support old units. Ask if you have need.
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