Kyocera FS-1128MFP Service Manual page 213

(2) Main charger unit
As the drum rotates in a "clean (neutral)" state, its photoconductive layer is given a uniform, positive (+) corona charge dis-
persed by the main charger wire. Due to high-voltage scorotron charging, the charging wire can get contaminated by oxi-
dization after a long run. Therefore, the charger wire must be cleaned at a specific interval. Cleaning the charging wire
prevents print quality problems such as black streaks.
Main charger wire
1
Figure 2-1-8 Main charger unit
(1)
(2)
(3)
(4)
Main charger shield
Zener
Drum
PWB
Figure 2-1-9 Drum unit and main charger unit block diagram
2
4
3
Main charger shield
Main charger wire
Main charger grid
Main charger wire cleaner
Main charger output
Main charger grid
M
High voltage
PWB
2JN
2-1-5