I had an Onkyo SR607 with a volume control encoder not working, turning the knob up the volume number would move around crazy and not work reliably.
Took it out and apart and no, it's not oxide or cleaning, lube required etc.- the metal is simply worn out. It's a 30mm part with metal bushing.
Volume control encoder Onkyo P/N 25065655W, Alps EC12E2425 is some oddball variant I could not find. I did the dig and tried replacement part Alps EC12E2420803 and it works/fits just like the original. Mouser 688-EC12E2420803 for $3.00
Took it out and apart and no, it's not oxide or cleaning, lube required etc.- the metal is simply worn out. It's a 30mm part with metal bushing.
Volume control encoder Onkyo P/N 25065655W, Alps EC12E2425 is some oddball variant I could not find. I did the dig and tried replacement part Alps EC12E2420803 and it works/fits just like the original. Mouser 688-EC12E2420803 for $3.00