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 ?
> >
>