Discussion about the Korg PolySix synthesizer

--- Thanks once again for your quick response. This will "hopefully" 
narrow diagnosing time for me. Looks like I'll better get my 
soldering iron and a wire out. 




In PolySix@yahoogroups.com, klosmon <klosmon@s...> wrote:
> Correct -- even in Manual mode, it won't work.
> The Polysix (& other "memory" synths) runs ALL of its control 
voltages thru 
> the CPU -- any problem on the data or address lines will be 
reflected in 
> the synth audio section.
> I've never seen a battery-damaged P6 that didn't need at least SOME 
trace 
> repair -- if you're fairly comfortable with reading schematics & 
tracing 
> circuitry, this is do-able.  If you're not, you might want to call 
in some 
> help.
> 
> ~G
> 
> At 12:02 PM 10/6/2005, you wrote:
> >--- Thanks for your response. If I read you comments right, you say
> >that if the traces to the processor or IC31 are damaged you 
possibly
> >will not get any sound? Does this also hold true if you try to play
> >it in "manual mode"?
> >I did take out the old battery and tied in a fresh battery to see 
if
> >I could get sound out of it but no luck.  There was a little acid
> >leak which I cleaned up and did a "quick" continuity on the traces
> >around the chip which seemed to be fine. Obviously that does not 
mean
> >traces underneath or the vias are good. Please confirm that in deed
> >if traces are bad even if in maunal mode I will not get sound.
> >Thanks.
> >
> >
> >
> >
> >
> >
> >In PolySix@yahoogroups.com, "Seppo Sipilä" <Seppo.Sipila@m...> 
wrote:
> > > > and stable. Powered it up and I still have no sound. CAn 
anyone
> >tel
> > > > me if this is a Battery issue. I would think a battery leak
> >problem
> > > > would not allow you to store but would it cause NO SOUND? 
Looking
> > > > for some areas to next look at.
> > >
> > > The battery leak on my Polysix was very hard to see, but it 
damaged
> > > the memory circuit board and the nearest chip underneath so 
that I
> > > had complete sound loss and several memory lights lighting up at
> >the
> > > same time. The damage screwed up the memory board so that the 
poor
> > > thing didn't know what settings to use and went silent instead.
> > >
> > > Just in case someone doesn't know this yet: if you have a 
Polysix
> > > that has never had the battery replaced, DO IT NOW. The battery 
is
> > > more than 20 years old and just waiting to leak corrosively all
> >over
> > > the memory circuit board. If it hasn't done so yet, you've been
> >lucky
> > > - but it won't last. I found this out the hard way (luckily I 
had
> >my
> > > patches backed up just recently and a soldering wizard of a 
friend
> >to
> > > do the repair job properly).
> > >
> > > Now it works perfectly again with a modern metal hydride 
battery,
> >but
> > > it was a much bigger soldering & chip-replacing job than just
> > > replacing the old battery before it leaks. There are excellent
> > > Polysix battery leak repair instructions on Old Crow's pages
> >(thanks
> > > a 1000000): 
> > 
<http://www.oldcrows.net/~oldcrow/synth/korg/polysix/>http://www.oldcr
ows.net/~oldcrow/synth/korg/polysix/
> > >
> > > S.
> >
> >
> >
> >
> >PolySix "Digiest" Page: 
> 
><http://www.acc.umu.se/~amber/Poly6>http://www.acc.umu.se/~amber/Poly
6
> >
> >
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