Hi Steve,
The D(SW12) and 4(SW18)Switches uses the same line in the Programmer matrix, identified P13, Pin-5 of CN10 welded to the KLM-371(programmer board)
On the KLM-371 between the SW15(PROGRAM-1) & the SW16(PROGRAM-2) you have a Fixing screw.
The P13 trace pass just above,
removed this screw and turn on the P6 on says us !
All the Best
Djé
--- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
>
> Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
>
> sound demo:
> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>
> Bank D and Program 4 constantly illuminated:
> http://imgur.com/TFEPUPB
>
> Thank you! Any advice would be appreciated.
> -Steve
>
> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> >
> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > it back to life. Nothing I've done has changed anything yet so I'm at a
> > bit of an impasse and I'm hoping someone out there might be able to help
> > me narrow down what I should do next. I know how to use a soldering iron
> > but I'm a complete beginner at repairing circuit board traces.
> >
> > Let me give you the symptoms.
> >
> > 1. It sounds like it's gone absolutely mental with constant oscillation
> > and other insanity going on from the moment I power it up.
> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > powering up.
> >
> > After cleaning up most of the corrosion I could find around the battery,
> > it really didn't look as bad as I thought it might so I went ahead and
> > just installed a Lithium battery holder (using Old Crow's guide) and
> > tried powering up again. Nothing changed.
> >
> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > all the traces in the area with a multimeter. Every trace I tested gave
> > me a happy little beep, even the uglier looking ones that were near the
> > old battery, so I went ahead and soldered in a new socket and 74LS08
> > chip at IC31. Powered up. Nothing changed.
> >
> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > wires on the ugly looking traces even if my multimeter says they're
> > conducting just fine? Should I replace the other ICs that were near the
> > battery like IC30 even if they look fine?
> >
> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > then I start to experiment:
> >
> >
> > Bank D and Program 4 constantly illuminated:
> >
> >
> > First sight:
> > <http://imgur.com/Wv173WQ>
> >
> > After initial cleanup:
> > <http://imgur.com/M8POlkz>
> >
> > Installed battery:
> > <http://imgur.com/Pj3kDFT>
> >
> > Replaced IC31:
> > <http://imgur.com/Nab9GYz>
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>