Discussion about the Korg PolySix synthesizer

fixed! my friend specialized to repair old gear replaced some IC´s. he
told me that someone has earlier tried to fix it also, and there was
some amateur-soldering made. someone had manually, by soldering,
tresspassed two IC´s functions. how weird is that :)

thanks for helping!


--- In PolySix@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> Very strange.... any battery leakage ?
> 
> Also, you may want to try to replace any logic IC connected directly 
> with the problematic control, placed on the front panel's pcb..
> 
> 
> 
> --- In PolySix@yahoogroups.com, "roisto" <roisto@> wrote:
> >
> > thanks, i will try that. it does happen with 7th and 8th 
> oscillators,
> > but only one at time. changing eg-mode seems to affect wich one is
> > malfunctioning.
> > 
> > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > >
> > > Does it happen only to one of the 8 oscillators ? if so, replace 
> its 
> > > SSM2044 chip....
> > > 
> > > 
> > > 
> > > --- In PolySix@yahoogroups.com, "roisto" <roisto@> wrote:
> > > >
> > > > I mean that filter of the last two oscillators has somehow 
> turned 
> > > to 
> > > > work negative. When cutoff filter is opened, one oscillator 
> plays 
> > > it 
> > > > closed (like lowpass effect), and vice versa, when filter is 
> > > closed, 
> > > > one oscillator plays filter totally opened. Two modes at the Eg-
> > > mode 
> > > > seems to change this effect between 7th and 8th osc. Thank you 
> for 
> > > > you reply.
> > > > 
> > > > -t
> > > > 
> > > > 
> > > > 
> > > > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > > > >
> > > > > What do you mean by "opposite way" ??
> > > > > 
> > > > > The replacements seems fine to me.
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > --- In PolySix@yahoogroups.com, "roisto" <roisto@> wrote:
> > > > > >
> > > > > > I just got this synth and it has something wrong with 7th 
> and 
> > > 8th
> > > > > > voices. When i´m adjusting eg intensity, filters for the 
> last 
> > > two 
> > > > > > voices are working opposite way :) i opened it and found 
> that 
> > > all 
> > > > the 
> > > > > > vcf:s were SSMT2044 except voice 8 wich was SSM2044 (maybe 
> > > > someone 
> > > > > > has changed one or all of them?!) and MC14066B chip at the 
> 8th 
> > > > voice 
> > > > > > has been replaced with F 4066BPC (having "indiana" text on 
> > > it).. 
> > > > > > anyways battery was brand new inside the trident, and 
> > > everything 
> > > > else 
> > > > > > seems to work 100%. Any ideas how to fix this?
> > > > > >
> > > > >
> > > >
> > >
> >
>