Canon iR1200 Series Service Manual page 148

Chapter 6
As for the following, care should be taken when
attaching or detaching the drum unit.
1. Be sure to use the drum shutter stopper as attaching
or detaching work.
2. Use the packaging box of the new drum unit if
available.
3. After detaching the drum unit,be sure to keep it in a
protective bag to prevent damage to the drum
surface.
3) Detach the drum shutter stopper.
4) Detach the drum shutter cover stay [1] and remove
the drum shutter cover [2].
[1]
5) Remove the toner bottle from the machine.
6) Remove the 6 screws [1], and remove the cover [2].
6-4
[2]
[1]
F-6-8
[2]
[1]
7) Remove the 2 screws [1].
8) Detach the hook [2] and remove the cover [3].
[2]
[3]
F-6-10
9) Remove the 3 screws [1] and remove the covers [2].
F-6-11
10) Remove the developing cylinder [1].
[1]
F-6-9
[1]
[1]
[1]
[2]
[1]