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20 July 2005
6.2 MACHINE OVERVIEW
6.2.1 FIRMWARE
• The machine firmware controls the printing process
6.2.2 PRINT ENGINE
Paper Feed Mechanism
The paper feed mechanism consists of the following.
1) 250 sheet paper feed unit.
2) By-pass tray
3) Pick-up rollers, friction pads and feed rollers.
Together with sensors in the feed path these serve to control paper registration and
guide the paper through the Image transfer, image development, image fusing and
exit assemblies. The paper path has an anti-static connection to earth and
eliminate paper feed problems due to static charge on the paper.
Drive Mechanism
The main drive mechanism uses a Bi-polar 2 phase motor. It drives the OPC,
paper pick-up and paper feed rollers using a gear train mechanism.
Development Unit
The machine uses the laser scanning unit (LSU) of the mechanism to create
images on the OPC drum.
Transfer Unit
High voltages supplied by the HVPS move the image from the developer unit onto
paper.
Fusing Unit
The fusing unit applies the toner image onto the paper. This is achieved with a
temperature controlled heating unit.
6-5
MACHINE OVERVIEW
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