Details Of The Optical System - Lexmark C500n Service Manual

Details of the optical system

In the optical system process, the printer utilizes a semiconductor laser diode as a light source. This laser
diode is controlled by fast switching which matches the transmitted image data (video signal).
The generated laser light scans the OPC belt through a polygon mirror and lens. The electrostatic latent
images are formed on the OPC belt.
The Optical printhead unit consists of following parts:
No. Description
PD: photo detector
1
Polygon mirror: hexahedral mirror that reflects the laser beam
2
Cylinder lens: laser beam condenser
3
Laser unit: laser diode light emitting source
4
LDC: laser diode control circuit
5
BTD mirror: beam timing detector mirror to guide the laser beam to PD
6
Scanner motor: rotates the polygon mirror
7
F-lens: laser beam focus lens
8
Mirror: laser beam path reflecting mirror
9
5023-110
1-31
General information