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DP-C405/C305/C265
FEB 2008Ver. 1.1
6.4. Printing Process
Laser Printer creates an image on the paper using a technique called laser electrophotography. The printer
uses the electrographic process known as Discharged Area Development, or “write black”. In this process,
a digitally modulated laser scans laterally across a rotating OPC (Organic Photo Conductive) drum that has
been negatively charged. Wherever the OPC drum is exposed by laser beam, the image is written and
toner is transferred.
Pickup Roller
Intermediate
Transfer Belt
Reverse Roller
Paper Feed Roller
Paper Feed Roller
Paper Feed Roller
Pickup Roller
Polygon Motor
First Bias Transfer Roller (FTR)
OPC
Y
Toner
Cartridge
Y
Toner
Cartridge
M
Toner
Cartridge
C
Toner
Cartridge
BK
OPC
M
OPC
C
OPC
BK
Pickup Roller
Pressure
Roller
Second Bias
Transfer Roller
(STR)
Fuser
Roller
Heat Roller
Heater Belt
(Optional Paper Transport Unit)
Laser Scanning Unit (LSU)
Pickup Roller
Pickup Roller
Intermediate
Transfer Belt
Cleaning Blade
IH Coil
Charge
Roller
ADU
Paper
Registration
Roller
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