To avoid paper jam errors, you must adjust the position of wires to allow smooth operation of the exit sensor. Without properly adjusting these wires, you may have difficulty attaching the fuser covers, and your printer may repeatedly report paper jams by mistake.
After adjusting the wires, when installing the exit roller assembly, lift the sensor arm over the wiring. Once the assembly is closed, make sure the arm is not making contact with the wiring.
The sensor arm on the exit roller assembly is designed to lift up when paper passes through the roller area. When the wiring blocks the arm from dropping, it causes the printer to behave as if there is paper in the area and report a false jam.
Replacing the fuser unit can be a tricky process if this step is not taken. For further details on how to replace the fuser unit for this machine, please visit our full Brother MFC-L8900cdw fuser replacement instructions for this series of Brother printers.
Fuser Unit / 115 volt 
Fuser Assemblies / Units 
