Charging Control - Canon imageRUNNER ADVANCE C5500 Series Service Manual

■ Print Process
ITB cleaning block
8.ITB cleaning
3.Developing
Developing block
2.Laser exposure
1.Primary charging
Static latent image
formation block
Block
Static latent image formation
block
Developing block
Transfer block
Fixing block
ITB cleaning block
Drum cleaning block

Charging Control

To charge the Photosensitive Drum surface to a negative potential, this machine uses the Charging Roller to perform charging
control.
4.Primary 4.Primary
transfer transfer
Y
M
Photosensitive
Photosensitive
drum
drum
9.Pre-exposure
10.Drum cleaning
Drum cleaning block
No. Process
1 Primary charging
2 Laser exposure
3 Development
4 Primary transfer
5 Secondary transfer
6 Separation
7 Fixing
8 ITB cleaning
9 Drum Cleaning Pre-exposure Pre-exposure LED Unit removes the residual charge.
10 Drum cleaning
Delivery
Fixing block
Transfer block
ITB
4.Primary 4.Primary
transfer transfer
C Bk
Photosensitive Photosensitive
drum drum
Pickup
Flow of print paper
Rotating direction of ITB, photosensitive drum
The surface of the Photosensitive Drum is charged to make a uni-
form negative potential.
Emission of the laser light forms a static latent image on the surface
of the Photosensitive Drum. (Image exposure: laser exposed area
becomes image area)
With the dry, 2-component AC developing method, toner that has
been negatively charged by the Developing Cylinder is attached to
the Photosensitive Drum.
Toner on the surface of the Photosensitive Drum is transferred to
the ITB by applying positive charge from the back side of the ITB.
Toner on the ITB is transferred to the paper by applying positive
potential to the Secondary Transfer Outer Roller.
With the curvature separation method, the paper is separated from
the ITB. In the case of thin paper which has low elastic force, the
Static Eliminator reduces potential on the back side of paper to
make the thin paper to be separated easily.
The toner on the paper is fixed on the paper by heat and pressure.
The Cleaning Blade removes the residual toner attached on the ITB.
The Cleaning Blade removes the residual toner attached on the
Photosensitive Drum.
77
2. Technology
7.Fixing
6.Separation
5.Secondary
transfer
Registration
Description