I recently purchased a used BCR2000 for the sole purpose of converting it to a Zaquencer. I initially loaded the demo to check out the functionality of the encoders (didn’t want to install the full version on faulty hardware). Everything worked fine so I purchased the full version and loaded it up. To my surprise, after installing the full version, some of the encoders moved very slowly. Some of them would require 4 or 5 spins just to increment or decrement the value by one.
I’ve run into this before with other electronic devices so figured it might well be a symptom of dirty contacts within the encoders. After powering off the unit and unplugging it, I applied a liberal amount of contact cleaner (I use Caig’s Deoxit) and worked each encoder to help break loose whatever was clogging the contacts. After spraying the encoders out with compressed air, I reconnected the unit, turned it back and viola, all encoders now work perfectly!
I’d hate for anyone to damage their unit so please be sure to use a cleaner rated for electronics, make sure you power off the unit and unplug it, and be careful to restrict the cleaner to the encoders. I was not able to gain direct access to the encoders so I directed the cleaner in at the base of each knob. Again, your results may vary, and there are no guarantees but it did work for me.