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2.3.3.3 LSU ( Laser scanning unit )
LSU consists of LD(Laser Diode) and polygon motor control part. For realizing Color Image, it is controlled
by 4 LDs. When the controller generates the printing image signal, LD will turn on and Polygon motor starts.
If the receiving part in LSU detect the beam , Hsync is generated. When the polygon motor is rotated with a
steady speed, it is time of LSU ready status for printing.
Photo Diode
LD Driver circit
Protector panel
Service Manual
Product Overview
LD(Laser Diode)
Y
Y
Y
M
M
M
C
C
C
2-42
OPC Drum
Polygon Mirror
Polygon Motor
Motor Driver
K
K
K
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Troubleshooting
