Charging The Drum - Kyocera FS-1050 - B/W Laser Printer Service Manual

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 unit A.
Zener
board
KP-788
As the drum C rotates in a "clean (neutral)" state, its photoconductive layer is given a uniform,
positive (+) corona charge dispersed by the main charger wire B.
Due to high-voltage scorotron charging, the charging wire can get contaminated by oxidization
after a long rum. Therefore, it must be cleaned periodically from time to time using the method
explained in chapter 3. Cleaning the charging wire prevents print quality problems such as black
streaks.
FS-1050
High voltage board
CN2-A4
YC-M
Main charging output
A
B
Figure 4-1-4 Charging the drum
Engine board
Bias
board
MHVDR
YC12-5
C
4-6