MX-4100N, MX-4101N, MX-5000N, MX-5001N (serv.man27). Service Manual-Details Of Each Section-(H)LSU Section - Sharp Copying Equipment Service Manual (repair manual). Page 2

MX-4101N  LSU SECTION  H – 2

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 lines of laser for
one color are radiated. The LSU unit is composed of the optical ele-
ment from laser to the polygon mirror, the primary system including
the mirror which assures light path, and the main scanning system.

(Primary system)

(Scanning system)

Main scanning direction

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.

1

LD PWB

Controls flashing of laser beams and the output values.

2

Cylindrical lens

Converges laser beams to focus.

3

f

θ 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.

4

f

θ 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.

LD2

LD1

LD1

LD2

LD2

LD1

LD2

LD1

LD2
LD1

LD2
LD1

BK

Front

Rear

C M Y

Scanning
direction

Scanning
direction