Pre-Transfer Charging Assembly; Before Removing Pre-Transfer Charging Assembly; Removing Pre-Transfer Charging Assembly; Photosensitive Drum - Canon iR5055 Series Service Manual

Chapter 7
[3] [4]
When replacing the primary charging wire or the primary charging assem-
bly, be sure to execute the following in the service mode to clean the wire:
COPIER > FUNCTION > CLEANING > WIRE-CLN.
Further, be sure to use a strengthened polishing pad (blue holder) as the
cleaning pad.

7.10.4 Pre-Transfer Charging Assembly

7.10.4.1 Before Removing Pre-Transfer Charging
Assembly
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
1) Detach the front cover. (page 10-13)Reference[Removing the Front
Cover]
2) Detach the toner supply cover. (page 10-14)Reference[Removing the
Toner Supply Cover]
3) Remove the primary fan duct. (page 10-29)Reference[Removing Prima-
ry fan Duct]

7.10.4.2 Removing Pre-Transfer Charging Assembly

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
1) Shift the fixing/feeder assembly release lever to release the feeder assem-
bly.
2) Remove the pre-transfer charging assembly [3].
- 1 connector [1]
- 1 screw [2]
Be sure to execute the wire cleaning in the user mode after mounting the pre-
transfer charging assembly.

7.10.5 Photosensitive Drum

7.10.5.1 Points to Note When Handling Photosensitive
Drum
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The machine's photosensitive drum is made of high-sensitivity amorphous
silicon, and its sensitivity can start to deteriorate depending on how and
where it is placed, requiring the following:
[1] Whenever the process unit is removed from the machine or the photosen-
sitive drum is removed from the process unit, be sure to protect the pho-
tosensitive drum against light. Wrap 6 or more sheets of A3 or larger
paper around the photosensitive drum.
[2] Do not place the process unit or the photosensitive drum in a area subject
7-22
[1] [2]
F-7-43
[2] [3] [1]
F-7-44
to the direct rays of the sun.
[3] Do not place the process unit or the photosensitive drum in an area sub-
ject to high or low temperature or humidity or where temperature or hu-
midity tends to change rapidly.
[4] Do not place the process unit or the photosensitive drum in an area sub-
ject to dust, ammonium gas, or organic solvent/gas.
The foregoing requirements commonly apply to all photosensitive drums.

7.10.5.2 Before Removing Photosensitive Drum

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
1) Detach the front cover. (page 10-13)Reference[Removing the Front
Cover]
2) Detach the toner supply cover. (page 10-14)Reference[Removing the
Toner Supply Cover]
3) Remove the primary fan duct. (page 10-29)Reference[Removing Prima-
ry fan Duct]
4) Remove the developing assembly. (page 7-28)Reference[Removing
Developing Assembly]
5) Remove the process unit. (page 7-20)Reference[Removing Process
Unit]
6) Remove the primary charging assembly. (page 7-21)Reference[Remov-
ing Primary Charging Assembly]
7) Remove the pre-transfer charging assembly.
8) Remove the potential sensor unit. (page 7-31)Reference[Removing Po-
tential Sensor Unit]

7.10.5.3 Removing Photosensitive Drum

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
1) Remove the potential sensor rail stay [2].
0015-4879
- 2 screws [1]
[1]
0015-4880
2) Remove the gear plate [2].
- 3 screws [1]
[2]
3) Remove the front side stay [2].
- 2 screws [1]
[1]
0015-4881
4) Remove the photosensitive drum by holding it as indicated.
[2]
F-7-45
[1]
[1]
F-7-46
[2] [1]
F-7-47
0015-6503
0015-4888
[1]