I need help identifying this 360 degree rotary encoder on my Roland SC-880 rack synthesizer. This one has become 'jumpy' and Roland claims the part is discontinued. So my only choice is to replace it. (or figure a way to open and clean it?)
This encoder has 20 detents and a push switch to select different modes. It's 17mm x 9mm at the base, and about 37mm tall. The synth came out in 1998 and I'm told Roland used Alps Encoders. What's the best way to go about replacing or fixing this?