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Chapter 6 Principles of Operation
6 – 4
1.3.2 Exposure
In the exposure process, the drum surface charged negatively is scanned by laser beams to form
invisible electrostatic latent image on the drum surface.
This process is performed in parallel for yellow, magenta, cyan and black colors.
- Laser beams are emitted from the laser diode in the PRINT HEAD. By the rotating polygon mirror,
fixed mirror and lens attached to the Scanner Motor Assy of the PRINT HEAD, each color of drum
surface is scanned from end to end in the axial direction.
engine principle0007FA
Quad Beam Laser Diode
Polygon Mirror
Lens
Lens
Mirror
Mirror
Mirror
Mirror
Mirror
Mirror
Mirror
Mirror
Mirror
Drum (Y)
Drum (M)
Drum (C)
Drum (K)
: Laser beams (M)
: Laser beams (Y)
: Laser beams (C)
: Laser beams (K)