Discussion about the Korg PolySix synthesizer

Yah I ment 367...

It looks like it hasn't be 100% repaired...
Can you see corrosion on other boards as well ?


--- In PolySix@yahoogroups.com, jure zitnik <kokoon@g...> wrote:
>
> you mean KLM-367?
> 
> i wonder what could cause that led flashing?
> 
> jure
> 
> On 1/30/06, gil_we <gil_we@y...> wrote:
> > It sounds like the KLM-267A is not fully functioning yet
> >
> >
> > --- In PolySix@yahoogroups.com, jure zitnik <kokoon@g...> wrote:
> > >
> > > here's the thing:
> > > i'm not repairing the polysix myself but i'm still pretty 
involved
> > > since the man repairing it doesn't have that much experience 
with
> > > analogue synths. and i have zero experience with actual physical
> > work
> > > on synths :/
> > >
> > > so - the polysix:
> > > the battery leaked but the traces were repaired. this guy 
probably
> > did
> > > it all correctly but i'm not 100% sure. let's say they're 
alright
> > now.
> > > we also replaced IC31 (the lower of the 2 identical 4xAND 
gates) but
> > > the symptoms are still the same as they were before the repair:
> > > - synth usually works okay for the first half hour or so. 
except the
> > > patch storage.
> > > - patch programmer: bank 3 and prog 3 are lit all the time. you 
can
> > > select another bank and program but nothing can be saved.
> > > - the attenuator 13 way switch doesn't work at all.
> > > - after some time other controls stop responding (and stay like 
they
> > > were set): waveform selector, VCA gate mode and effect selector.
> > > - usually when this happens some program and bank leds (actually
> > bank
> > > 1 and 2 and program 2) start dimly blinking like there's some 
short
> > > circuit or something. this gives me doubts whether it's really 
CPU
> > > (IC21) fault. if it were faulty it would probably just die or
> > > something... right?
> > >
> > > so - what would you guys check next? how possible do you think 
it is
> > > that it's the CPU? what about the 18-pin SRAM IC? any other ICs 
that
> > > usually fail?
> > >
> > > i really appreciate your help so far!
> > >
> > > thanks!
> > > jure
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>