Oce does, it's how they control who works on their equipment. Some of the newer models actually have the service manual in the software of the machine. That way we only have to carry a key, not a whole laptop. Canon's prismaSync has gone to the Sam key for service mode, but not for manuals. 7502 is cleaning heater loose. Could be a loose connection, could be a bad heater. The part number is 1060113893. It's located under the cover where your maintenance tray is. Not the worst cover to take off. Looks like it's on the rear side. Can't believe places won't work on it. What it does is get hot to melt the toner off the imaging device.