Ok thanks. It makes sense I guess, but I'm probably going to try tuning it one more time
because I really don't feel like putting any more effort into this keyboard if I can help it. I
just got an OB-8 so I really don't need the P6, but I like the arpeggiator and SSM sound so
that's why I keep it around. Any idea how much that part cost anyway?
--- In PolySix@yahoogroups.com, Johannes Hausensteiner <johau@...> wrote:
>
> Hi,
>
> search the message archive for a message from Peter Andersson on
> Tue Feb 10, 2004 3:30 pm (msg #646). He had the same problem and
> found a replacement part for the opto isolator. I downloaded the
> data sheet then. Now I have uploaded it to the files section of
> the list.
>
> Cheers,
>
> Johannes
>
>
> Sam Larch wrote:
> > You can check the message history to find that a few P6 owners are having a
> > tuning problem. The most likely culprit, it seems, is that an opto-isolator
> > (HTV-P1501) has failed which in turn is rendering the tune-high useless...so
> > the board won't tune correctly.
> >
> > I've been unable to find a replacement opto-isolator - or a datasheet even.
> >
> > If you - or anyone else for that matter - finds a supplier for these ICs, or
> > has a replacement circuit (even better) please let us all know.
> >
> >
> >
> >
> > On 6/25/06, Mike Thompson <tubmyk2@...> wrote:
> >
> >> I recently had my Polysix KLM-367 board serviced through Old Crow
> >>(replacement, rather)
> >>and just got it back a few days ago. Unfortunately I needed to
> >>re-calibrate the oscillators
> >>and tune them since it sat for so long not being used. But the tuning is
> >>still off - not really
> >>a seperate oscillator problem so much as I can't get it to the right pitch
> >>using the tune
> >>knob. Even at the max to the right (sharp) I cannot get the unit to hit a
> >>perfect a-440.
> >>And just to clear up the dummy-factor, I even made sure that the tune knob
> >>was set at
> >>dead-center when I began the oscillator tuning, so i would have
> >>flexibility in both
> >>directions if the tuning shifted. I am about to re-do the process but I am
> >>curious if
> >>anyone else has suggestions as to why this may happen even though I kept
> >>the pot at the
> >>center? Any help is appreciated, thanks.
> >>
> >>~Mike
> >>
> >>
> >>
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>