Epson AcuLaser C2800 - Technical Explanation of Print Process; Charging

AcuLaser C2800/C2800D/C3800/C3800D Revision C
OPERATING PRINCIPLES Technical Explanation of Print Process 33
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2.3 Technical Explanation of Print Process
2.3.1 Charging
In charging process, BCR (Bias Charge Roll) applies a uniform negative potential to
the drum which rotates at a fixed speed. This process is performed simultaneously for
each of the yellow, magenta, cyan and black colors.
 BCR is a conductive roller and keeps contact with the drum to move together with
it. HVPS supplies discharge voltages to the BCR, and then the BCR discharges
negative DC voltage.
 Drum surface is uniformly charged to a negative potential with DC bias voltage.
The Drum surface is made of conductive material coated with a photosensitive
material that becomes insulating in darkness and becomes conductive when it is
subjected to light.
 Cleaning Roll contacts the BCR and attracts toner.
Figure 2-3. Charging
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