Canon Satera LBP-5600SE User Manual page 119

4
Slide the blue lock release lever of the drum cartridge that you
want to replace to the position of " ", and release the lock.
Slide the blue lock release lever so that the triangular mark on the lock release
lever matches that of the label.
5
Remove the drum cartridge.
Remove the drum cartridge by holding the blue tabs as shown in the figure.
118
Tabs
Tabs
Lock release lever
Align the triangular marks.