MX-3114N OPERATIONAL DESCRIPTIONS 13 – 21
B. Operational descriptions
(1)
General
Image data sent from the LSU Mother PWB are converted into
laser beams and radiated onto the OPC drum surface. The LSU
unit is composed of : (1) the optical elements from the laser to the
polygon mirror, (2) the primary system including the mirror which
secures the optical path, (3) the optical elements including the poly-
gon mirror, and (4) the scanning system including the mirror which
secure the optical path.
(2)
Composition
Primary system
Scanning system
Main scanning direction
Writing position on paper
Signal name
Name
Function/Operation
BD
Laser beam detector
Detects (monitors) the laser bean scan timing.
PGM
Polygon motor
Scans laser beams.
TH1_LSU
LSU temperature sensor
Detects the temperature in the LSU. (For correction of the LSU distortion)
No.
Name
Function/Operation
1
LD PWB
Drives the laser diode and controls the power.
2
Colimeter lens
Forms laser beams.
3
f
lens 1
Equalizes the laser beam dot intervals in the main scanning direction. (Corrects the laser dot
intervals on the OPC drum.)
4
f
lens 2
5
f
lens 3
6
1st mirror
Reflects laser beams to the OPC drum.
7
2nd mirror
Reflects laser beams to the OPC drum.
8
3rd mirror
Reflects laser beams to the OPC drum.
9
4th mirror
Reflects laser beams to the OPC drum.
10
Cylindrical lens
Leads laser beams to the polygon mirror.
11
Conversion lens for BD
Converges laser beams and leads to the BD (Bean Detector).
12
Filter glass
Prevents dust, toner, and foreign materials from entering the LSU.
13
LSU shutter
Closes the exposure opening port in conjunction with opening of the waste toner box, preventing
dust, toner, and foreign materials from attaching.
14
Shutter ring cam
Shutter closes the exposure opening port in conjunction with opening of the waste toner box.
15
BD mirror
Leads laser beams to the BD (Beam Detector).
16
Skew adjustment screw (C, M, Y, K)
Adjusts the radiating angle of laser beams for the OPC drum. By turning this adjustment screw,
image skew can be adjusted.
BK
C
M
Y
FRONT
REAR
Scanning
direction
FRONT
REAR
Scanning
direction
Paper exit
direction
