Canon imageRUNNER ADVANCE C3330 Series Service Manual page 75

No.
3 Toner Bottle
4 Drum Unit
5 Laser Scanner Unit
■ Print Process
ITB cleaning block
8.ITB cleaning
3.Development
Developing block
2.Laser exposure
1.Primary charging
Static latent image
formation block
No. Block
1 Static latent image for-
mation block
2
3 Developing block
4 Transfer block
5
6
7 Fixing block
8 ITB Cleaning Block
9 Drum cleaning block
10
■ Bias Types
The following 5 types of bias are used with this machine.
Bias name
Primary charging bias (DC)
Flow of print paper
Rotating direction of ITB,
photosensitive drum
4.Primary 4.Primary
transfer transfer
9.Drum Cleaning Pre-exposure
Y
Photosensitive
Drum
Photosensitive
Drum
10.Drum cleaning
Drum cleaning block
Process
Primary charging
Laser exposure
Development
Primary transfer
Secondary transfer
Separation
Fixing
ITB cleaning
Drum cleaning pre-expo-
sure
Drum cleaning
Bias Application location
types
DC Primary Charging Roller
Name
Delivery
ITB
4.Primary
transfer
M C
Photosensitive
Drum
Pickup
Details of processing
The surface of the Photosensitive Drum is charged to make a uniform neg-
ative 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 neg-
atively 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.
Pre-exposure LED Unit removes the residual charge.
The Cleaning Blade removes the residual toner attached on the Photosen-
sitive Drum.
Secondary Transfer High Voltage PCB (UN03)
63
Fixing block
7.Fixing
Transfer block
6.Separation
5.Secondary transfer
4.Primary
transfer
Bk
Photosensitive
Drum
Registration
Control PCB
2. Technology