Brother MFC6800 - Print Process Mechanism

3-8
3.2.2.2 Print process mechanism
The print process unit works with laser beam, electrical charges, and toner. The graph below
shows the transition of electrical charge on the surface of the laser-sensitive drum through the five
processes: charging, exposing, developing, transferring, and erasing processes.
1
2
3
4
1 Charges the drum surface positively.
2 Exposes the drum surface to a laser beam
to form a latent image and develops the latent
image with toner.
(a) Unexposed area (Non-image area)
(b) Exposed area (Image area)
3 Transfers the toner-formed image from the
drum to paper.
4 Erases the residual potential.
A single cycle of laser-sensitive
drum operation
Time
(a)
(b)
+1000
+700
+400
+300
Electrical
charge
on the drum
surface (V)