Lsu - Samsung CLX-6250FX Service Manual

2.4.4 LSU

The LSU consists of LD(Laser Diode) and polygon motor control. The LSU is controlled by 4 LD's in order to
better reproduce a full Color Image. When the controller generates the printing signal, LD will turn on and
Polygon motor starts.If the receiving part in LSU detects the beam, Hsync is generated. When the rotation
of polygon motor is properly synchronized, the LSU is ready for printing. If either of two condition are not
satisfied, an LSU error is thrown by the copier engine.
Photo Diode
LD Driver circit
Protector panel
Trouble
Hsync Error
Polygon Motor Error
Service Manual
Product Specification and feature
LD(Laser Diode)
Failure Analysis
If the rotation of polygon motor is not properly synchronized, the signal for
the Hsync is not generated.
The rotation of polygon motor is not stable.
2-37
OPC Drum
Polygon Mirror
Polygon Motor
Motor Driver
Samsung Electronics