Canon imageRUNNER ADVANCE C5255 Series Service Manual page 83

2
Technology > Image Formation System > Overview > Print process
■ Parts configuration
● Major Parts
Toner container
Y M C
Toner supply
assembly
Y M
Laser scanner unit
2 Technology > Image Formation System > Overview > Print process
Bk
Transfer
assembly
C Bk
Waste toner case
Developing assembly
+ Drum unit
■ Print process
ITB cleaning block
9. ITB cleaning
5. Primary transfer
4. Developing
Developing block
Y
3. Laser exposure
Photosensitive
drum
2. Primary charging
Static latent image
F-2-63
formation block
● Overview
Static latent 1 Pre-exposure
image
formation block 2 Primary charging
3 Laser exposure
Developing 4 Developing
block
Transfer block 5 Primary transfer
6 Secondary transfer To apply positively-charged potential to the secondary
7 Separation
Fixing block 8 Fixing
ITB cleaning 9 ITB cleaning
block
Drum cleaning 10 Drum cleaning
block
Delivery
ITB
5. Primary transfer 5. Primary transfer 5. Primary transfer
10. Drum cleaning
1.Pre-exposure
M C Bk
Photosensitive Photosensitive Photosensitive
drum drum drum
Drum
cleaning
block Pickup
Flow of print paper
Rotating direction of ITB, photosensitive drum
To remove residual charge on the surface of photosensitive
drum by exposure of pre-exposure LED light
To charge the surface of photosensitive drum to be
uniformed negative potential
To create static latent image on the surface of
photosensitive drum by emitting laser light (image exposure:
laser exposure area becomes image area)
To attach negatively-charged toner from the developing
cylinder to the photosensitive drum by non-negative
2-component jumping developing method.
To apply positively-charged potential from the back surface
of ITB to transfer toner on the surface of photosensitive
drum to ITB.
transfer outer roller to transfer toner on the ITB to the paper.
To separate paper from the ITB by curvature separation
method. In the case of thin paper which has low elastic
force, the static eliminator reduces potential on the surface
of paper to separate thin paper more easily.
To fix toner on the paper with heat and pressure.
To remove residual toner on the ITB by the cleaning blade.
To remove residual toner on the photosensitive drum by the
cleaning blade.
2-45
Fixing block
8. Fixing
Transfer block
7. Separation
6. Secondary transfer
Registration
F-2-64
T-2-27
2-45