Canon Color imageRUNNER LBP5975 User Manual page 373

Make sure that the lock release levers (A) located on both sides of the back of
the fixing unit are tilted.
(A)
8
Install the fixing unit in the printer.
Hang the hooks of the fixing unit (A) on the projections on the printer (B) as
shown in the figure.
6
(A)
(B)
6-50 Replacing the Fixing Unit