Canon imageRUNNER ADVANCE 4551i Service Manual page 283

4. Disassembly/Assembly
3. Remove the 2 screws [2] of the Pressure Plate Units (Front/Rear) [1], and open them in the direction of the arrows.
CAUTION:
• Be sure not to turn the fixing nip pressure adjustment screw.
• Note that the fixing nip pressure cannot be adjusted in the field. If the adjustment screw has been turned and the nip
pressure has been changed, replace the Fixing Assembly.
[1]
1x
1x
[2]
[2]
270