No luck, the pitch pot still only works for the first half of its range. :(
But the mod pot now controls the vcf instead of the dco, When this pot is full right, the
vcf mod is off, it turns on full really quickly (maybe through the joystick's deadzone only?)
right around 1/2 way (as I turn it left)...
Here's how I have it now: Both right posts are connected to +5, Both left posts are
connected to ground. 1 middle post is connected to 1-4b and the other middle post is
connected to 1-5b. The -5V wire on the connector is not connected to anything. The
voltage on the middle pins now varies from 5V to 0V.
I have an extremely limited knowledge of hardware. But from a rookie deduction
standpoint, I would assume all of the wires on the connector must have to be used. It
seems to make sense that this is true because now the DCO can't be controlled whereas
with the -5 connected it could, why else would they have the pins on the connector live?
I'd play around a bit with it myself but I'm scared of frying something, and I don't have any
alligator clips so experimenting is fairly painful ...
Is this starting to make any sense to you at all Mike?
Thanks for your time!...
-Tim
--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> Hi Tim,
>
> let's try this.
>
> Connect the -5V side of the pots to ground.
>
> Mike.
>
>
>
> ________________________________
> From: serotonic_sound <sero-tonic@...>
> To: korgpolyex@yahoogroups.com
> Sent: Monday, February 16, 2009 11:02:30 PM
> Subject: [korgpolyex] Re: Missing Joystick board (KLM-599) "mod"
>
>
> Actually, I wasn't quite right in my description. The vcf isn't affected at all by the mod
> pot.
>
> -Tim
>
> --- In korgpolyex@yahoogro ups.com, "serotonic_sound" <sero-tonic@ ...> wrote:
> >
> > Hey Mike,
> >
> > Thanks for your help...I did what you recommended. ..I'm not sure what you were
> > expecting the results to be but I'm getting the following:
> >
> > 1) The pitch pot only works the first half of its range. From Full Left To Center
increases
> > the pitch from about a 5th down to normal. But, the second half (Center to Right)
does
> > nothing. I would have expected the pitch to rise above normal.
> >
> > 2) The Mod pot also only does something through the first half of its range...I don't
> know
> > exactly what the behaviour of the joystick was originally, but I find that with the DCO
> > amplitude mod parameter set to 0 I can mod the dco mod go to 15 with the pot. (Its at
> 15
> > when the pot is in the middle). With DCO set to zero the pot does nothing to the
DCO.
> > With the vcf mod parameter set to zero the pot does nothing to the vcf. With the vcf
set
> to
> > full, the pot increases the vcf from off to full.
> >
> > I used all the wires from the existing 1b connector and tapped -5 (blue) to one side of
> the
> > pots, +5 (red) to the other side of the pots. Then attached one middle post to 1-4B
and
> > the other middle post to 1-5b...Sound right?
> >
> > I verified that the pots are sending -5 through +5 volts with zero in the middle
through
> > 1-4B and 1-5B.
> >
> > I can play in tune again, but the results aren't quite what I was expecting...
> >
> > What do you think?
> >
> > Thanks again for your help...
> > -Tim
> >
> >
> >
> > --- In korgpolyex@yahoogro ups.com, Michael Hawkins <korgpolyex800@ > wrote:
> > >
> > > If I were in your situation I wouldn't touch the existing trim pots.
> > >
> > > And, I would use two 10K linear pots or trimpots to fake the missing joystick
> assembly.
> > >
> > > Connect the left and the right side of both pots to -5V and +5V.
> > >
> > > And connect the wipers of each to connect pin 1-4B and 1-5B.
> > >
> > > This will allow you to set the VCF/DCO modulation to zero as well as pitch bend.
> > >
> > > If you use pots you could even make a plate to go over the joystick hole and mount
> the
> > pots right there.
> > >
> > > I still think you should pop a new joystick in there though. LOL
> > >
> > > Mike.
> > >
> > >
> > >
> > >
> > > ____________ _________ _________ __
> > > From: Gordon J. C. Pearce MM3YEQ <gordon@>
> > > To: korgpolyex@yahoogro ups.com
> > > Sent: Thursday, February 12, 2009 6:44:20 AM
> > > Subject: Re: [korgpolyex] Missing Joystick board (KLM-599) "mod"
> > >
> > >
> > > On Thu, 2009-02-12 at 08:44 +0000, serotonic_sound wrote:
> > >
> > > > Gordon, you said I could potentially wire up a couple of 4.7K resistors... but it
looks
> > like
> > > > that board has a few more components, where would I install these resistors
> exactly
> > given
> > > > that I'm missing the entire joystick assembly and board?
> > >
> > > I'll dig out the Poly-800 and draw out the circuit of the joystick board
> > > later today.
> > >
> > > Gordon
> > >
> >
>