Main Charger Unit - Olivetti d-Copia 3003MF Service Manual

(2) Main charger unit

As the drum rotates in a "clean (neutral)" state, its photoconductive layer is given a uniform, positive (+)
corona charge dispersed by the main charger wire. Due to high-voltage scorotron charging, the charging wire
can get contaminated by oxidization 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
Y113860-1
1
Figure 2-1-8 Main charger unit
1. Main charger shield
2. Main charger wire
3. Main charger grid
4. Main charger wire cleaner
Drum
ZEPWB
Figure 2-1-9 Drum unit and main charger unit block diagram
2
4
3
Main charger output
Main charger shield
Main charger grid
2-1-5
2MH/2MJ/2MK/2ML
M
HVPWB
Sevice Manual