OK, that's different.
Looking at your picture, I'd say you need to consider replacing the pickup roller assembly! Those are hopelessly pitted, and that will surely cause sparking! It would be possible to clean those up with something like a Cratex polishing wheel, but I suspect easier to just replace them.
FWIW, virtually all of the small AC motorized units will have some sparking at the pickups, seems it's the nature of the beast. However, with those rollers, I suspect that's a primary reason for excessive sparking.
