Yamaha SY99 -1991    Weight = ? Lbs. Number mfg.= ? MRP=$3995

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 expansions
General Info Links: Vintage Synth Explorer

Circuit Overview:
     An improved version of the SY77 with extensive sequencer and bigger 76 key keyboard. Yamaha's last word in advanced FM with better effects and samples.

Service Tips:
     Anyone? These use the typical DX7 movement still I believe so typical keys breaking from vigorious sliding. Otherwise haven't heard of any problems.

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