Outline; Operation - Konica Minolta bizhub C250 Service Manual

Theory of operation ver. 3.0 Aug. 2006
8.2

Operation

8.2.1

Outline

• 4 types of the printer head are used for exposure process.
• The surface of the photo conductor is irradiated with a laser light and an electrostatic
latent image is thereby formed.
• The polygon mirror has four faces. The machine uses a two-beam array LD to inhibit the
speed of the polygon mirror from increasing because of the decreased number of faces
the polygon mirror has as compared with the conventional models.
• The two-beam array LD consists of two LD elements arranged vertically. Two lines are
scanned with two laser beams emitted from these two LD elements through a single face
of the polygon mirror.
Transfer belt
PC drum Y
Beam A
Beam B
PC drum
Direction
of rotation
of the PC
drum
G2 lens
Return mirror 2
Y M
LD/Y LD/M
Laser diode
Beam A
Beam B
Polygon
mirror
G1 lens
Return mirror 1
8. Write section (PH section)
C K
2nd image transfer roller
LD/C LD/K
Surface of the PC drum
Two lines
one scan
Direction of
rotation of
the PC drum
4038T2E501DA
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