Brother HL-4000CN Service Manual page 86

Toner Cartridge ASSY
Agitator
Auger
Auger
Dram surface
Toner image
Fig.3-13
Trimmer Rod
Paddle
Auger
HVPS
Fig.3-12
-V
0
III-8
-
: Negative electric charge
+
: Positive electric charge
: Toner
: Carrier
Magnet Roll
-
-
+ Drum
-
+
+
-
+
-
Electric potention
on drum
Developing
bias
Fig.3-14