Kyocera Mita Ecosys FS-1010, Service Manual

Page: 57 / 172

4-6
FS-1010
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
.
Figure 4-1-4 Charging the drum
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.
C
B
A
High voltage board
MHVDR
Main charging output
Bias
board
Engine board
YC12-5 CN2-A4
YC-M
Zener
board
KP-788