Open the rear cover [A].
Release the lock levers [A].
Fusing Unit [A]
If replacing a used fusing unit for Emergency Maintenance (EM), you must reset the PM counter. Be sure to use a fusing unit that does not include the new-unit detection.
For Preventive Maintenance (PM), use a fusing unit that includes the new-unit detection. The PM counter is reset automatically and is not inherited after replacement. Also, the counters for image transfer roller, paper feed roller and friction pad are reset by the new-unit detection.