Circuit Overview:
This is a digital synth that was sort of Korg's answer to the DX7. Another early software based synth with some specialized chips to perform the computing tasks.
Service Tips:
Other than soldering the board involved I don't have a lot of hints at this time. Due to the low value of the units at the time I scrapped the one that I've gotten in.
parts:
Let me know anything you need. I have a scrap unit that had something wrong in one of the processors it appeared. SO chances are most of the stuff is just fine.