Laser Unit
SM 7-15 D255/D256/M281/M282
Descriptions
7.3 LASER UNIT
The charged surface of the drum is scanned by the laser beam from the laser unit. The polygon
motor rotates to reflect the laser beam over the drum. Various lenses and mirrors are housed in
the laser unit, to adjust the diameter of the laser beam, and focus it on the drum surface.
No. Name No. Name
1 Polygon motor 4 Unit base
2 f-theta main lens 5 Unit cover
3 Dust shield glass 6 Mirror
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