hello Gordon,
thanks so much for your advice, you've been very kind,
I head straight to the search of the 74HC74.
the problem of my joystick is that the pitch bend modulation (right and left) is combined with the DCO modulation and VCF (above and below) ..
if I move the joystick up and down = nothing happens.
if you move the joystick right and left = simultaneous modulation of pitch bend + DCO (by moving the joystick to the right) and simultaneous modulation of pitch bend + VCF (by moving the joystick to the left).
sorry for my English, I translated with google translate, but I hope you understand.
regards
Vincenzo
Il Giovedì 2 Giugno 2016 2:01, "Gordonjcp gordon@... [korgpolyex]" <korgpolyex@yahoogroups.com> ha scritto:
On Wed, Jun 01, 2016 at 02:55:35PM +0000, Vincenzo Vincenzo sarvamala@... [korgpolyex] wrote:
> time ago, a group member had reported problems with the joystick and was solved by changing the integrated IC17 (TC40h74P) ..
> I contacted him because I also have problems with the joystick and confirmed that I had solved by replacing IC17.
> Unfortunately in Italy the integrated IC17 is nowhere to be found, just find I follow the advice he gave me the user group on replacing the IC17.
> for now I can not help you more, I hope you can be useful as a hint.
How do you know this chip is faulty? What exactly is the problem with the joystick?
A suitable replacement for IC17 is probably 74HC74.
--
Gordonjcp MM0YEQ