Kyocera KM-3050 Service Manual page 254
Laser printers
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Also See for KM-3050:
- Service manual (252 pages) ,
- Specifications (1 page) ,
- Command reference manual (410 pages)
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2GN/2GP/2GR
1.
Laser diode: Generates the laser beam which forms a latent image on the drum.
2.
Collimator lens: Collimates the diffused laser beam emitted from the laser diode to convert it into a cylindrical
beam.
3.
Cylindrical lens: Shapes the collimated laser beam to suit the printing resolution.
4.
Polygon mirror: Nine-facet mirror that rotates with each face reflecting the laser beam toward the drum for one
main-direction scan.
θ
5.
f
lens: Corrects for non-linearity of the laser beam scanning speed on the drum surface, keeps the beam diame-
ter constant and corrects for the vertical alignment of the polygon mirror to ensure that the focal plane of the laser
beam is on the drum surface.
6.
Mirror: Reflects the laser beam and changes the irradiation direction.
7.
Mirror: Reflects the laser beam and changes the irradiation direction.
8.
BD sensor mirror: Reflects the laser beam to the BD sensor to generate the main-direction (horizontal) sync sig-
nal.
9.
Cylindrical correcting lens: Corrects for the deviation of the laser beam reflected by the BD sensor mirror to the
BD sensor.
10. BD sensor: Detects the beam reflected by the BD sensor mirror, outputting a signal to the main PWB (MPWB) to
provide timing for the main-direction sync signal.
2-1-8
Drum
Figure 2-1-10 Laser scanner unit (2)
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