Discussion about the Korg PolySix synthesizer

You must replace each IC a the area. The acid gets inside them.


--- In PolySix@yahoogroups.com, "mydadvsyours" <arturo00@...> wrote:
>
> Thanks for the reply!
> 
> Oh yeah, I'm fully aware of the battery issue and I've done plenty 
of
> retracing around IC31 and have fixed many of the major problems. I 
was
> just hoping to get some specific info to help accelerate the 
process.
> But, I have the schematics now so that'll help quite a bit. And I'll
> take your advice and do some searching. I already had a good read
> through of some of the more recent posts and found some invaluable
> info in there.
> 
> Is it necessary to replace the IC's if the traces are being taken 
care
> of? it *looks* like it's in good shape, but I guess looks can be
> deceiving.
> 
> I will also note that the Effects section seems to be working just
> fine now.
> 
> 
> --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> >
> > There' a lot of info about these type of problems on the archives,
> > just search ;)
> > 
> > Basically what you have is an acid eaten board (KLM367),
> > you need to retrace and replace the ICs around the battery area.
> > 
> > I must say that although I already fixed a few, the last one was a
> > pain and I ended up returning it to the owner. I fixed most 
problems
> > except for the memory selector which was acting strangely, again 
check
> > the archives.
> > 
> > --- In PolySix@yahoogroups.com, "mydadvsyours" <arturo00@> wrote:
> > >
> > > Hey there. I'm in the process of fixing one of my polysixes. I'm
> > pretty close to complete. I 
> > > have a few remaining issues and was just wondering if any of you
> > could tell me exactly 
> > > where/what on the KLM-367 board I'd need to fix in order to get
> > these issues resolved. (I 
> > > know that most of the problems revolve around the 7408's at 
IC31 and
> > IC32...). As 
> > > mentioned, I have another polysix that i'm using for parts and 
have
> > pretty much swapped 
> > > all of the boards...and the problems mentioned above are still
> present.
> > > 
> > > Here are my problems:
> > > 
> > > - Chorus always on (no difference between either of the 3 
effects,
> > but speed/emphasis 
> > > adjustment still works)
> > > - Bank D and Program 4 or 5(?) lights stay on all the time
> > > - VCO selector only outputs Sawtooth and PWM waveforms
> > > - Attenuator doesn't do anything (but the EG selector seems to 
work
> > ok...now!)
> > > - Mod wheel has no effect
> > > - The memory section is a little wonky
> > > 
> > > So yeah, any help or suggestions would be greatly appreciated...
> > > 
> > > Arturo.....
> > > 
> > > ps. Also, i'd like to not have that second polysix goto waste. 
does
> > anyone know if its 
> > > possible to use the circuit boards for other applications (ie.
> > external filter, wave generator,  
> > > etc). If you know of any sites that show how to frankenstein 
polysix
> > modules, lemme 
> > > know!
> > >
> >
>