Samsung SCX-6545N Service Manual page 36

2.2.2.5 LSU
■ LSU consists 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 polygon 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
2.2.2.6 Scanner( DADF)
■ Scanning Method: Color CCD
■ Scan speed : Mono 45 / Color 20 ipm@ 300dpi
■ FCOT (first copy out time) : Within 5 sec (from platen)
■ DADF Copy speed : simplex 45cpm(LTR)
Service Manual
Product spec and feature
No steady rotation of Polygon Motor
In spite of steady rotation of Polygon Motor, No the generation of the Hsync
signal
duplex 30cpm(LTR)
Failure Analysis
2-24
Samsung Electronics