Canon ImageCLASS MF7480 - Manual (Page 272)

10‑3
Maintenance
Fixing Unit
If black streaks appear on the printed page, the fixing unit in the main unit may be dirty.
Should this occur, use the Fixing Unit Cleaning function to clean the fixing unit. The fixing
unit should also be cleaned each time the cartridge is replaced. Print the cleaning pattern
on LTR paper for cleaning the fixing unit.
1
Press (Additional Functions).
2
3
4
The cleaning paper is printed. You will use
this paper as the cleaning paper.
5
Open the stack bypass.