yes, i've fixed it eventually. i've posted this a few times already
but here goes again:
REMOVE all the traces that look even remotely damaged by the battery
leak. seriously. just jumping them won't do it, you have to REMOVE
them. i dug them out with an exacto, just like old crow says.
i also replaced the resistor array in that area.
make sure you assemble the programmer switch board so, that none of
the keys are too tightly pressed to the frontpanel, at one point i
found out that was causing my problem of some LEDs being lit all the
time (keys were actually pressed)
and, once more, REMOVE EVERY SINGLE TRACE that looks corroded.
good luck!
jure
On Jan 20, 2008 10:23 PM, Daniel Akzinor <apophis93@yahoo.com> wrote:
> This describes my problem exactly... Did you ever find a fix?
>
> - Daniel
>
>
> --- In PolySix@yahoogroups.com, jure zitnik <kokoon@...> 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
> >
>
>
>
>
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