MX-5001N LSU SECTION H – 2
2. Operational descriptions
A. Outline
Image data sent from the image process circuit through the PCU
are converted into laser beams which are radiated to the surface of
the OPC drum.
In this model, 2-laser system is employed where 2-laser diodes for
each color are radiated. The LSU unit is composed of the optical
element from laser to the polygon mirror, the primary system
including the mirror which assures light path, and the main scan-
ning system.
B. Composition
(Primary system)
(Scanning system)
Main scanning direction
Signal name Name Function/Operation
CCFM Process air inlet fan motor Cools charger section of the process.
PGM Polygon motor Reflects the laser beams at constant-speed rotating.
LSU_FAN LSU cooling fan motor Cools the section LSU.
LSUSS LSU shutter solenoid Opens/closes the LSU shutter.
No. Name Function/Operation
1 LD PWB Controls flashing of laser beams and the output values.
2 Cylindrical lens Converges laser beams to focus.
3fθ lens 1 Laser beams are refracted so that the laser scanning speed at the both ends of the OPC drum is the same as
that at the center.
4fθ lens 1
5 Reflection mirror Assures the optical path for laser.
6 Cylindrical lens Collects the laser beams, and focuses it on the OPC drum.
7 Collective lens for BD Converges laser beams to the BD PWB.
8 BD PWB Detects the timing for starting laser scanning.
9 LSU PWB Laser beams are controlled and the polygon motor control signal is generated according to the PCU PWB
control signal and image data.
10 LSU thermistor Measures the temperature in LSU.
LD2LD1 LD1LD2 LD2LD1 LD2LD1
LD2
LD1
LD2
LD1
BK
Front
Rear
CMY
Scanning
direction
Scanning
direction
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