Samsung SCX-5530FN/XAZ Service Manual page 23

3.1.3.5 LSU
LSU is consist of LD(Laser Diode) and polygon motor control. When the controller generate the printing signal LD will
turn on and Polygon motor starts.If the receiving part in LSU detect the beam and then Hsync is generated. When the
rotation of poygon motor is steady, it is time of LSU ready status for printing. If either of two condition is not satisfied,
LSU error is expected.
Trouble
Polygon Motor Error
Hsync Error
3.1.3.6 Scanner( ADF)
3 in 1 : SCX-5330N
4 in 1 : SCX-5530FN
Scanning Method: Color CCD(600 x 1200 dpi)
Scan speed : SDMP 28cpm/MDSP 20cpm
Samsung Electronics
Failure Analysis
No steady rotation of Polygon Motor
In spite of steady rotation of Polygon Motor,
No the generation of the Hsync signal
System Overview
Service Manual
3-5