Lexmark C720 Service Manual page 46

5024-001
Optical System
The optical system consists of two functional parts that forms an
electrostatic latent image on the OPC belt using a laser light.
Optical unit
Scanner motor (SCM)
Paper Transport System
The paper transport system consists of five functional parts that
picks up paper from the paper cassette, separates the transported
paper from the transfer drum, and exits it from the printer after fusing
the toner image on the paper.
Paper cassette
Transport
Paper discharge
Fuser
Paper exit
Control System
The control system consists of four control parts and runs the printer
by processing the interface signals transmitted from the computer
and the other printer systems such as the print, transfer, optical, and
transport system.
Sequence control
Laser control
Fusing temperature control
Interface control
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Service Manual