Samsung SF-76x series - Hardware Configuration and Boards

2.Productspecandfeature
2.2.4.5.LSU(LaserScannerUnit)
ItisthecorepartoftheLBP(LaserBeamPrinter)whichswitchesfromthevideodatareceivedtothecontrollertothe
electrostaticlatentimageontheOPCdrumbycontrollinglaserbeam,exposingOPCdrum,andturningprincipleofpolygon
mirror.TheOPCdrumisturnedwiththepaperfeedingspeed.TheHSYNCsignaliscreatedwhenthelaserbeamfromLSU
reachestheendofthepolygonmirror,andthesignalissenttothecontroller.ThecontrollerdetectstheHSYNCsignalto
adjusttheverticallineoftheimageonpaper.Inotherwords,aftertheHSYNCsignalisdetected,theimagedataissentto
theLSUtoadjusttheleftmarginonpaper.Theonesideofthepolygonmirrorisonelineforscanning.
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