Service manual

5. Drum cleaning stage
Step 7: Drum cleaning
Figure 2-4-4
1. Electrostatic latent image formation stage
This stage has two steps which form an electrostatic latent image on the photosensitive drum.
At the end of this stage, negative charge remains in the unexposed dark areas, while negative
charge is removed by the laser beam to form light areas.
Since this image of negative charges on the drum is invisible to eyes, it is called an electro-
static latent image.
Figure 2-4-5
CHAPTER 2
2 - 24
Drum cleaning
stage
Transfer stage
Electrostatic latent image formation stage
Developing stage
2. Scanning exposure
Fixing stage
6. Fixing
Paper delivery
5. Separation 4. Transfer
7. Drum cleaning
3. Developing
1. Primary charging
Manual feed slot
Flow of paper
Direction of drum rotation
Multi-purpose tray
0
-100
-500
Time (t)
Surface electric potential (V)
Light
area
Dark
area
Scanning
exposure
(step 2)
Transfer
(step 4)
Primary
charging
(step 1)
Primary
charging
(step 1)