Laser Scanner Unit (Lsu); Toner Cartridge - Xerox Phaser 3150 Service Manual

4.2.7 Laser Scanner Unit (LSU)

This is the core of the laser printer. It converts the video data received from the computer into an electrostatic latent
image on the surface of the OPC drum. This is achieved by controlling the laser beam and exposing the surface of the
OPC drum to the laser light. A rotating polygon mirror reflects the laser light onto the OPC. Each face of the mirror
produces one scan line. As the OPC drum turns, the laser scans, to create the full page image.
The HSYNC signal is created when the laser beam from the laser unit reaches the end of the polygon mirror and this
signal is sent to the controller. The controller detects the HSYNC signal to adjust the vertical line of the image on
paper. In other words after the HSYNC signal is detected the image data is sent to the laser unit to adjust the left
margin on the paper.

4.2.8 Toner Cartridge

The toner cartridge is an integral unit containing the OPC unit and toner unit. The OPC unit consists of the OPC drum
and charge roller. The toner cartridge unit consists of the toner, supply roller, developing roller, and blade (doctor
blade).
Developing Method
Toner
Toner Life
Toner remaining sensor
OPC Cleaning
Management of waste toner
OPC Drum protecting Shutter
Toner CRUM Reader
Non magnetic 1 element contacting method
Non magnetic 1 element shatter type toner
3,500 sheets / 5,000 sheets (ISO19752 standard)
No
Film OPC using an electro-static cleaning process
Collected using an electro-static process and retained within the toner
cartridge. No waste toner to dispose of.
No
Identifies whether toner is Xerox branded toner or whether a Non-Xerox toner
cartridge is installed in the printer
Summary of Product
Service Manual 4-7