JX-8P Volume/data slider PCB shot

[Jim Battin]

Recently I got a broken (but somewhat functional) Roland JX-8P.  It
seems the previous user allowed a bunch of soda, coffee, and beer get in
this thing and the entire Volume/data/Aftertouch slider board is covered
with it entirely (it looks like its been sitting there for at least a
year).  I was wondering if anybody would know where I can find a
replacement slider PCB for the JX8P.

I cleaned out the volume and Edit slider, but the dont work correctly. 
If its near the bottom, i have no volume, middle a moderate amount, and
top i have full.  For the edit slider, it either comes up with 0 if its
all the way down or 99 if its 1/4th up.

I'm asking this because I know there's a lot of keyboard techs on these
lists.  Any help would be much appreciated.

Also, could there be something else wrong that the sliders don't work
correctly?  Perhaps a screwed up microcontroller or something?

Thanks

Jim Battin
PlanetZ at mediaone.net