Canon imageRUNNER ADVANCE C3330 Series, Service Manual

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