2FP/2FY/2FR
2-1-9
Charging the drum
The following shows a simplified diagram of the electrophotographic components in relation to the engine system.
Charging the drum is done by the main charger wire.
Figure 2-1-9 Charging the drum
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. The grid regulates the main charging potential so that it is evenly and stably
dispersed over the drum at a constant voltage level.
Due to being high-voltage scorotron charging, the main charger wire can get contaminated by oxidization after a long run.
Therefore, it must be cleaned periodically from time to time using the charger wire cleaner (charger cleaning knob).
Cleaning the main charger wire prevents print quality problems such as black streaks.
MCHON*
Main charging
output
Engine board
YC5-10
Main charger wire
Drum
Grid
High voltage unit
Zener
board
KP-1073
M
CN2-9
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