Kawai/Teisco SX-400 -1980    Weight=? Lbs. Number mfg.= 100? MRP=1690

User Manual: Sander's site
Reset Proceedures: N/A
Operating System code: Meyer's
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings: N/A
Circuit Overview: below
Scematics/Service Manual: fdiskc archive or Sander's site
Service Photos: Meyer's
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: CA3086 and typical digital chips. 2716 EPROMs Transistor VCO's + VCF's.
Modifications:Battery mod
General Info Links: Vintage Synth Explorer

Circuit Overview:
     Fairly elaborite analog subtractive with small 8 patch memory and 8 presets. 4 VCO's that can be arranged in single, dual, or quad mode with independent tuning and sync possibilities. Very rare.

Service Tips:
     Typical battery corrosion issues. Check immediately and clean w/baking soda etc. Probably solder a bunch of wires around bad traces.


I should have many parts for these. Contact me if you need something.