Discussion about the Korg PolySix synthesizer

Hi,

I bought an old Polysix that have been standing in a cellar for a longtime, and it was non working, and I suspected the leaking battery of course.

And that was one of the problem, the leaking battery.

So I replaced the battery and cleaned up everything and I repaired all the broken leads I could find on the circuit board. 

And I have been checking every lead around the Processor and IC 30 and IC 31 and they all seems fine now.

And all the patchbanks works as they should now after my repair.

So now I get sound out from the Polysix and most of the functions seem to work as they should, but there is one big problem and that is the envelope generator controls.

When I turn the ADSR buttons it sounds like they controlling the filter instead of the envelope, they dont do any changes of the envelope at all.

So my question is: Can this malfunction still due to broken leads that I dont have found on KLM-367 or is it more likely that the problem is on another board now?

Peter

On Tue, 5/2/17, peterovesterlund@gmail.com [PolySix] <PolySix@yahoogroups.com> wrote:

Subject: Re: [PolySix] Envelope generator problem
To: PolySix@yahoogroups.com
Date: Tuesday, May 2, 2017, 8:30 AM


 









Thank you for your answer Bob, I really appreciate
it.And it sounds like the problem is somewhere in
that area after your description about how A, B and C
works.
But today I
measured both A, B and C line all the way from the MUX to
the respective leg on the CPU, and it is full contact all
the way.I dont have a scope so I cant check the
MUX switching.Can it be the MUX itself that are
broken maybe?
I tried
the control pots again and the Cutoff and the Decay makes
almost exact the same changes in the filter.
Peter


















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