Canon LBP5000 Series, Service Manual

Page: 42 / 162

Chapter 2
2-8
F-2-8
2.4.1.2 Image Formation Process
0010-6055
LBP5000 / LBP5100
The processes associated with the formation and printing of images are as follows:
The machine's printing processes may broadly be divided into the following 5 blocks (7 steps) during which a toner image is drawn on print paper as follows:
1. Electrostatic latent image formation block
Form an electrostatic latent image on the photosensitive drum.
Step 1:Primary charging
Step 2:Laser beam exposure
2. Developing block
Make the electrostatic latent image on the photosensitive drum surface visible by applying toner.
Step 3:Development
3. Transfer block
Transfer a toner image on the photosensitive drum onto paper.
Laser beam
Video
controller
Print command
Video signal
Laser/scanner
unit
Primary charging
roller
Developing cylinder
Photosensitive drum
Transfer roller
ETB
DC controller PCB
Bk
Memory tag
PRI DEV TR
High-voltage power
supply PCB
FSR
Fixing pressure roller
Memory controller PCB
Y
C
M
VDO4, /VDO4
VDO3, /VDO3
VDO2, /VDO2
VDO1, /VDO1