Brother HL-7050 Service Manual page 114

The area exposed to the laser beam is the image to be printed. The surface potential of the
exposed area is reduced, forming the electrostatic image to be printed.
1 Cycle of drum
1
+950
+500
+200
+100
Drum
Sleeve
1
2 3
2
(a)
3
(b)
Time
Fig. 3-19
3-19
Primary charging
Laser beam exposure and developing
(a) Unexposed area(Non image area)
(b) Exposed area
Transfer the image to appear
HL-7050 SERVICE MANUAL