2-12 Phaser 3250 Laser Printer Service Manual
Theory of Operation
Print Cartridge
The Print Cartridge is an integral unit containing the OPC Unit and toner unit.
The OPC Unit consists of the OPC Drum and Charging Roller. The Print
Cartridge consists of toner, Toner Cartridge, Supply Roller, Developing Roller,
and Blade (Doctor Blade).
■ Developing Method: Non-contacting method
■ Toner: Non magnetic 1 component pulverized type toner
■ Toner Life: 3,500 pages/5,000 pages (ISO19752 standard)
■ Toner Remaining Sensor: Yes
■ OPC Cleaning: Cleaning blade type
■ Management of Waste Toner: Collects toner using the Cleaning Blade.
■ OPC Drum Protecting Shutter: No
■ Toner CRUM Reader: Identifies whether toner is Xerox branded toner or
whether a Non-Xerox toner cartridge is installed in the printer, except for
the initial cartridge.
-1.25 ~ -1.45KV
s3250-073
Laser Scanning Unit (LSU)
0.20 mW
Charging Roller
Cleaning Blade
Transfer Roller
Developing
Roller
Supply Roller
Cleaning Roller
OPC Drum
Doctor Blade
Pre-Transfer Lamp
(PTL)
Max. +4.2kV
V
0
: -750V
V
L
: -130V
V
s
: -680V
V
D
: -430V
-+
-250V
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