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@yahoogroups.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@yahoogroups.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
>