Well, it took a little while to get hold of a replacement
opto-resistor, but I fitted it last night...
pretty confident I got it soldered in right,
but no joy :-(
The power-up autotune routine completed much quicker,
but the semitones were still all stretched to hell.
Looks like my Polysix is gonna have to make a trip to
www.synthrepairservices.com ...
--- In PolySix@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> Let us know if it helps...
>
> Had the same exact problem on my Trident and it indeed was the expo
> coverter.
>
> Thanks ;)
>
>
>
> --- In PolySix@yahoogroups.com, "David Davis" <feline1@> wrote:
> >
> > Thanks very much for the advice -
> > since that only involves replaceing two components on the boards,
> > even my wretched soldering skills oughta be able to handle it -
> > and it won't cost more than a few pounds...
> > Will definately give it a try!
> > DAVID
> >
> > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > >
> > > Check the Files section as for how to replace the optocoupler.
> > >
> > > Do not touch ANY of the trimpots, as once you replace the bad
> part it
> > > should stay in its normal tunning.
> > >
> > >
> > > --- In PolySix@yahoogroups.com, "David Davis" <feline1@> wrote:
> > > >
> > > > After many years faithful service, my polysix seems to have
> > > developed
> > > > a tuning problem :-(
> > > >
> > > > Usually when I first switch it on, and initially hit the keys,
> the
> > > > VCOs swirl around in pitch for about a second? (I presume
> that's
> > > some
> > > > kind of autotune routine or sthg.)
> > > >
> > > > However, recently, when I turn it on, this doesn't happen, and
> the
> > > > oscillators stay at some kind of wierd tuning (all the notes
> seem
> > > > stretched out, the octaves are about a third or more off pitch!)
> > > >
> > > > One time, I left it for about 20 minutes and when I tried
> again, it
> > > > was back to normal.
> > > > But yesterday it just remained in this wierd state.
> > > >
> > > > Any suggestions to make it behave?
> > > > I made sure that the pitch bend wheel was centred at power up.
> > > > The VCOs are switched to "stretch tuning" inside, but that's
> never
> > > > been a problem before, and this is orders of magnitude more
> > > stretched
> > > > than that.
> > > >
> > > > It's not a NiCd battery calamity, as my Polysix was upgraded a
> few
> > > > years ago to a "PolysixM" (with lithium battery) (Johannes
> > > > Hausensteiner's mod)
> > > >
> > > > DAVID
> > > >
> > >
> >
>