Discussion about the Korg PolySix synthesizer

-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 ?
>