Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Great! thanks Mike. are you certain these will work? have you used them before?
pete.

--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> http://futurlec.com/PotSliding.shtml
>
>
>
>
> ________________________________
> From: p <peteput@...>
> To: korgpolyex@yahoogroups.com
> Sent: Sun, September 19, 2010 12:30:10 PM
> Subject: [korgpolyex] Re: poly-800 mk1 seq speed slider broken
>
>
> Ok so the track inside the pot has small "blank spots" towards the top and
> bottom, are these tracks actually on the pcb or the pot itself? i have been
> trying to find a 100k lin pot @45mm with a 35mm throw but so far nothing doing,
> do you know where i could find one?
>
> poly love
> pete.
>
> --- In korgpolyex@yahoogroups.com, "p" <peteput@> wrote:
> >
> > Hi. So i took her apart again, resoldered all the wires from KLM597-b. and no
> >change again. took it apart once more and noticed inside the speed pot the
> >contact seemed much more dirty than the bend rate and tune pots. so after a
> >better clean with Servisol Super10 and a vigorous slider session things improved
> >dramaticallly though not 100%, now after an hour or 2 things have gone back to
> >norman slow and slower, should i take apart the pot and give it a thorough
> >clean? is this possible without removing it from the board?.
> >
> >
> > thanks so much for all your help...i'd be lost otherwise.
> >
> > pete.
> >
> > --- In korgpolyex@yahoogroups.com, "p" <peteput@> wrote:
> > >
> > > Hi Michael,
> > >
> > > thanks for the reply, i didnt see this until after i posted my last one...
> > > one thing im not sure about is which settings on the multimeter to use and
> >what the resistance values should be.
> > >
> > > pete.
> > >
> > >
> > >
> > > --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@> wrote:
> > > >
> > > >
> > > >
> > > > Hi Pete,
> > > >
> > > > the problem is more likely NOT the actual clock circuit itself (found on
> >the
> >
> > > > main board using half of IC36 and half of IC28 and sundry other discreet
> > > > components). For details of that circuit see section "4" on the main
> >circuit
> >
> > > > schematic in the files section.
> > > >
> > > > More likely is that there is a problem with the speed slider pot itself or
> >the
> >
> > > > the connector CN2.
> > > >
> > > > The annoying part of this is that the service manual doesn't include an
> >exact
> >
> > > > schematic diagram of the speed pot wired into the clock circuit.
> > > >
> > > > So you will need to do some tracing yourself. But I would start by checking
> >that
> >
> > > >
> > > > the slider pot runs through a range of resistance first. You will need a
> > > > multimeter for that. If you don't have a multimeter then you will need to
> >find
> >
> > > > someone that does or else go buy one.
> > > >
> > > > And then I would check to see that the three wires going from the main
> >board to
> >
> > > > the display board via CN2 are not broken. Make sure all thee connections
> >have
> >
> > > > continuity.
> > > >
> > > > Mike
> > > >
> > >
> >
>