Yamaha SY77/TG77 -1989    Weight = 37.5 Lbs. Number mfg.= ? MRP=$2995

User Manual: Yamaha
Reset Proceedures: N/A
Operating System code:
MIDI or other control protocol: See Manual
Software related Links:
Patches or knob settings: Zicweb (Ignore the top 'yamaha sounds' link)
Circuit Overview: below
Scematics/Service Manual:
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: Many
Modifications:1M memory upgrade
General Info Links: Vintage Synth Explorer (Their release date is in error.)

Circuit Overview:
     A digital synthesizer which utilizes special processing chips designed to support Yamaha's FM synthesis architecture. It also adds a sampled workstation environment. The FM is 6 operator very similar to DX7II. It was released during a power curve era in DSP development. Hence when the Wavestation broke within a year, it suddenly didn't sound quite as good. But Yamaha improved the engine in the SY-99 which is quite impressive still I hear. A sonic plateau had been achieved we could say.

Service Tips:

While Yamaha normally does not keep parts around more than 5 years or so, but I stock what I can.
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