Functional Overview
Image Formation System
Drum Sensitivity
The OPC material has properties similar to a photo-resistor. It
becomes electrically conductive when exposed to light. When the
photosensitive drum is exposed to light, the negative charges
deposited on it are conducted to the ground potential of the drum’s
base. Areas not exposed to light remain nonconductive and
maintain their negative charge.
CAUTION -
The printer’s toner cartridge does not include a
light blocking shutter. Be careful to avoid
exposing the drum to light, which can
permanently damage the drum. Protect the
cartridge whenever removing it from the printer,
preferably by inserting it into the protective bag
from its packaging.
—
t
T
area
I primary IScanning Transfer ~rim~
I
charging exposure
1
charging
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FigUre 5-1 U Drum Surtace Potential
5-24
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