Circuit Overview:
A subtractive analog synth similar in many ways to other CS series. Sine wave feed past filter to thicken up things. All knobs and 8 memory locations with typical knob scanning by CPU through analog switching.
Service Tips:
Typical problems in CS series are power supply over voltages which blow tantalum capacitors and they short, or the caps just fail over the years. During this various chips may be taken out. I've seen LFO chip, VCA's and dac comparator fail so they might be most susceptable. In recent one the YM617 MUX chip failed out of the blue after running solidly for quite a while. Fortunately Yamaha still had some!
Parts:
I believe I should have any electronic part or keys for these save exact transformer, etc. Ask if you have need.
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