Signal name Name Function and operation
LSUFM LSU fan Cools the LSU PWB section.
PGM 1 Polygon motor Rotates at a constant speed to scan laser beams. The polygon mirror motor rotates at a constant speed having
four mirrored sides to reflect two lase beams per color.
No. Name Function and operation
1 LD PWB To convert to a laser beam switching data sent from the LSU-PWB. And controlling a laser emission and laser
power.
2 Collimator lens Focuses laser beams.
3f lens To equalize main scanning direction laser beam dots distance. (To make laser dot distance of an end and the
central part of the OPC drum the same). In addition, to condense a laser beam to BD (beam detector).
4 Mirror Reflects laser beams to the OPC drum.
5 Incident cylindrical lens Focuses laser beams.
6 BD PWB To detect the laser scan timing. (Beam Detection)
7 Filter glass Prevents dust and toner from entering inside the LSU cavity.
8 Laser skew adjustment plate Adjusts laser skew in the main scanning direction for the OPC drum.
9 BD mirror Guides laser beams to the BD (Beam Detector).
10 LSUcnt PWB To covert the image data sent from MFPC-PWB to switching data and transfer it to LD-PWB.
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