Discussion about the Korg PolySix synthesizer

It looks a few problems still remain -

I just noticed that whatever setting you use, the Chorus effect is
always working (very interesting sounding when using the Phaser or
Ensemble, which play with the Chorus....). Also, when I use the Oct 2
setting (on Sub Osc), the root sound doesn't play.

Can you think of any direction ? I suspected IC34 and IC29, but no
harm to them and no corrosion at all at this area....

Thanks !



--- In PolySix@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> Sure. As I said, IC30 was the culprit.
> 
> 
> --- In PolySix@yahoogroups.com, "muffclone" <muffclone@> wrote:
> >
> > -HELLO
> > THIS PROBLEM IS THE BAD TRACES OF IC30 AND IC31 (TWO 74LS08) AND 
> REPLACE THIS 
> > IC´S
> > AND THE VIAS OF THE BOARD CAN BE BAD.
> > SORRY FOR MY ENGLISH.....
> > MERRY CHRISTMAS!!
> > -- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > >
> > > I have a nice looking P6 here. Battery has leaked and severely 
> damaged
> > > the 74L08 near it and all traces beneath. The symptoms where
> > > non-functioning Release and VCO '16 Oct functions, and cases 
> where a
> > > few preset leds light up together including the Write button led 
> which
> > > will sometimes light on and will not turn off. Also, pitch and 
> cutoff
> > > can change spontaneously as you play some chords.
> > > 
> > > I had it retraced and cleaned of course, and replaced the 74LS08 
> and
> > > 4011 above the battery (although the latter looked ok).
> > > 
> > > The current situation is that the Release and VCO '16 Oct 
> functions
> > > work ok, but the mess with the bank preset leds still exists. Can 
> you
> > > spot a particular IC which can cause the problem ? Other ideas ?
> > >
> >
>