Yamaha SY22/TG33 -1990    Weight = ? Lbs. Number mfg.= ? MRP=$1095

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:memory expansion
General Info Links: Vintage Synth Explorer

Circuit Overview:
     A 16 voice synth with mix of ROM samples and 2 op FM, a digital synthesizer partly designed by Dave Smith of Sequential Circuits using some of the ideas from the Prophet VS. The technology wasn't quite ripe but the Korg Wavestation followed soon after. This also found it's way into a consumer unit with speakers as the B500 found only in Japan I believe, save no vector stick and some different samples/24voice.

Service Tips:

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