Drum Unit - Canon imageRUNNER ADVANCE 4551i Service Manual

Execution timing
During execution of Full Adjust: User mode > Settings/Registration > Adjustment/Maintenance > Adjust Image Quality > Auto
Adjust Gradation

Drum Unit

The drum unit mainly consists of the photosensitive drum, primary charging roller, brush roller, cleaning blade, and waste toner
feed screw, and is driven by the main motor (M1).
Cleaning blade in contact with the photosensitive drum scrapes off the residual toner on its surface without being transferred to
a paper. The residual toner scraped off by the cleaning blade is fed from the toner ejection part into the waste toner container by
the waste toner feed screw. The primary charging roller is cleaned by the brush roller in contact with it.
Toner ejection part
No.
M1 Main motor
Main controller
PASCAL control
Primary charging roller
Developing assembly
Brush roller
Primary charging roller
Name
Reader controller PCB
Photosensitive drum
Paper
Waste toner feed screw
Cleaning Blade
Photosensitive drum
No.
[1] Main motor drive signal
92
2. Technology
Transfer roller
M 1
[1]
DC Controller PCB
Name