PC3K8 Kurzweil issues

Hello people,
I am desparately in need of a service manual for a PC3K8. All i can find is a PC3x. Are these the same??
I need an encoder potentiometer which is failing…anyone else have this issue?


The PC3K service manual is an addendum. The previous PC3 manual applies otherwise. You can get the encoder from InstrumentalParts.com. It’s a bit pricey but easy to do. As to why, impact and/or wear. Mechanical parts wear out.