Discussion about the Korg PolySix synthesizer

Hey guys,

I have a problem with my beloved Polysix. The Octave switch died. My Polysix was repaired years ago from battery leakage. It worked flawlessly untill this day so I don't think the problem are after-effects from the battery disaster.

I replaced the complete Switch Board with a spare part but the problem was still there.

Then I checked at IC28 on board KLM367 if the Switch responds and gives the appropriate voltage settings. Everything is OK!

I also checked the cable which runs from KLM367 with connector 5 to KLM366. Seems fine.Nothing is loose.

Now I'm a little bit lost in locating the problem.
It would be great If you guys can give me some tips.

Greeetings from Germany,
Stefan