Operation; Outline - Konica Minolta bizhub c650 Service Manual

8. Write section (PH section)
8.2

Operation

8.2.1

Outline

• The surface of the photo conductor is irradiated with a laser light and an electrostatic
latent image is thereby formed.
• The PH unit has a single-piece construction. The PH unit has four semiconductor lasers
with one laser for each four different color. A single polygon motor is used to make a
scan.
• To be compatible with the high speed printing system, a seven sided polygon mirror is
used. The two beam array LD is used to control the growth of the polygon motor rotation
speed.
• 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
Laser diode
polygon
mirror
32
M
Y
Beam A
PC
drum Beam B
Return mirror/2
G3 lens
G1 lens
Return mirror/1
Theory of Operation Ver. 8.0 Jun. 2008
C
K
PC drum surface
2 line
One scan
A00JT2C008DA