This Korg Kronos user replaces his joystick every few months due to heavy usage.
It never hurts to see how this works to do it yourself (if your warranty is over and you’re brave enough that is).
Mind you; if your Kronos is sounding out of tune, please check it the joystick is working properly. It could be sending a false pitch to the Kronos sound engine.
Please give this guy some likes for posting this video.