I've emailed an inquiry to Celedonia Organ Service. If they have the
service manual, I'll order it.
Thanks, all, for the help!
--- In kawai-teisco@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> I guess there should be some kind of similarity between the 240 and
> 210. You might do well trying to use the 240's schematics ;)
>
> An audio probe wil help as well. As I said, already two bad 4066 on
> mine, so I won't be surprised at all if you find a bad one on yours
as
> well...
>
>
> --- In kawai-teisco@yahoogroups.com, "Travis Shire" <boardjunkie@>
> wrote:
> >
> > There are sites which sell the service manual. I got the SM for
my 240
> > from Celedonia Organ Service. Cost me 15$. I doubt getting
datasheets on
> > chips will do much for you....you need to know how each IC is used
> in the
> > circuit. Without a schematic you'd likely be chasing your tail.
> >
> >
> > I'm not sure if it's on all the voices; I'll check in the next
few
> > days. You're probably right, Gil, about the op amp. AND the need
> > for a schematic. If I can't find one, I guess I'll just make a
list
> > of all the ICs on the synth board, google the datasheets, and
> > play 'hunt & peck' with the scope. Luckily, I'm not seriously
> > hobbled without it. I'm really glad that I don't have to depend
on a
> > bunch of old, cobbled together gear to gig with, like the old
days...
> >
> > --- In kawai-teisco@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > >
> > > My bet is that there's a bad opamp, or another 4xxx chip in
the
> > Cutoff
> > > circuit... Does it happen on all voices ?
> > >
> > > I had two bad 4066 in mine, so you might want to check in that
> > > direction. But again, I think you'll need the schematics.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --- In kawai-teisco@yahoogroups.com, "jfloydhumanoid"
> > > <capstoneliving@> wrote:
> > > >
> > > > --- In kawai-teisco@yahoogroups.com, "gil_we" <gil_we@>
wrote:
> > > > >
> > > > > Can you describe the problem more precisely ?
> > > > >
> > > > >
> > > > >
> > > > > --- In kawai-teisco@yahoogroups.com, "jfloydhumanoid"
> > > > > <capstoneliving@> wrote:
> > > > > >
> > > > > > --- In kawai-teisco@yahoogroups.com, "gil_we" <gil_we@>
> > wrote:
> > > > > > >
> > > > > > > We're still looking for one. The only scans that I
managed
> > to
> > > > get
> > > > > > was
> > > > > > > of the main CPU board... (in the Files section)
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --- In kawai-teisco@yahoogroups.com, "jfloydhumanoid"
> > > > > > > <capstoneliving@> wrote:
> > > > > > > >
> > > > > > > > I bought it new in '84, gigged with it a few years,
got
> > > > married,
> > > > > > & just
> > > > > > > > dug it out of storage a few months ago. Of course
the
> > patch
> > > > > > memory was
> > > > > > > > gone, but amazingly the Ni-Cd battery hadn't
leaked. I
> > > > replaced
> > > > > > it,
> > > > > > > > loaded the factory patches, & it fired right up!
It's in
> > > > great
> > > > > > shape,
> > > > > > > > except for a sort of 'garbled' artifact in sounds
with
> > the
> > > > filter
> > > > > > > > somewhat stopped down. If the filter cutoff is all
the
> > way
> > > > open,
> > > > > > it's
> > > > > > > > not present. Anybody have a PDF (or other form) of
the
> > > > service
> > > > > > > > manual? I'd be happy to send $ for your trouble...
> > > > > > > >
> > > > > > >
> > > > > > Thanks for looking, Gil... Anybody have any suggestions
> > where I
> > > > > > could point my scope probe & discover the origin of this
> > > > > > unwanted 'distortion'? I'm not afraid to troubleshoot
> > without a
> > > > > > schematic...you can't be timid & repair 'vintage'
> > electronics.
> > > > > > - J -
> > > > > >
> > > > >
> > > > It sounds similar to the 'overdriven' sound of a tube
amplifier
> > > > stage, but 'garbled', and not clipped. When the filter is
> > completely
> > > > open, the artifact isn't audible; only when the filter
cutoff
> > freq is
> > > > low enough for the heavily 'filtered' sounds. It also has an
> > aspect
> > > > of being periodic (having a set, repetitive pattern),
suggestive
> > of
> > > > possibly being a result of some other signal bleeding
through,
> > but
> > > > that's purely speculative...
> > > > In the next few days, if it's possible (and allowed) I'll
post an
> > MP3
> > > > in the files section. Would that be proper protol in this
> > group? I
> > > > don't have much experience in this area, so please forgive
me if
Show quoted textHide quoted text
> > > > it 'isn't done'.
> > > >
> > >
> >
> >
> >
> > --
> > See Exclusive Video: 10th Annual Young Hollywood Awards
> > http://www.hollywoodlife.net/younghollywoodawards2008/
> >
>
