Samsung MultiXpress K4 Series Service Manual page 3

2.6.2. Fuser unit drive ........................................................................................................... 2 − 39
2.6.3. Fuser unit temperature control........................................................................................ 2 − 40
2.7. Laser Scanning Unit (LSU)........................................................................................................ 2 − 41
2.7.1. LSU overview............................................................................................................. 2 − 41
2.7.2. Laser Scanning Optical path .......................................................................................... 2 − 42
2.7.3. Laser synchronizing detectors ........................................................................................ 2 − 43
2.8. Drive System .......................................................................................................................... 2 − 44
2.8.1. Drive Motors .............................................................................................................. 2 − 44
2.8.2. Main Drive Unit (OPC_DEVE_Regi_MP_Feed) ............................................................... 2 − 45
2.8.3. Pick Up Drive............................................................................................................. 2 − 48
2.8.4. Duct Drive ................................................................................................................. 2 − 49
2.8.5. Fuser/ Exit Drive ......................................................................................................... 2 − 50
2.8.6. Toner Supply Drive...................................................................................................... 2 − 51
2.9. Scanner System ....................................................................................................................... 2 − 52
2.9.1. Scanner System Overview............................................................................................. 2 − 52
2.9.2. Scanning System Components ....................................................................................... 2 − 55
2.9.3. Caution for moving the scanner...................................................................................... 2 − 61
2.10. Dual Scan Document Feeder(DSDF) for K4350 and K4300 ............................................................. 2 − 62
2.10.1. DSDF overview .......................................................................................................... 2 − 62
2.10.2. Electrical parts location ................................................................................................ 2 − 63
2.10.3. DSDF Drive System .................................................................................................... 2 − 65
2.10.3.1. DSDF Original Pick-Up Assembly ................................................................... 2 − 66
2.10.3.2. DSDF Original Regi. Drive............................................................................. 2 − 67
2.10.3.3. Original Scanning and Feed-Out Drive .............................................................. 2 − 68
2.11. Reverse Automatic Document Feeder(RADF) for K4250 ................................................................ 2 − 69
2.11.1. RADF overview .......................................................................................................... 2 − 69
2.11.2. Electrical parts location ................................................................................................ 2 − 70
2.11.3. RADF Drive System .................................................................................................... 2 − 71
2.11.3.1. RADF Original Pick-Up Assembly ................................................................... 2 − 72
2.11.3.2. RADF Registration (Regi) Drive Assembly ........................................................ 2 − 73
2.11.3.3. RADF Feed Drive Assembly ........................................................................... 2 − 74
2.11.3.4. RADF Exit Drive Assembly ............................................................................ 2 − 75
2.11.3.5. Original Return Drive .................................................................................... 2 − 76
2.12. Hardware Configuration ............................................................................................................ 2 − 77
2.12.1. Main Controller (Main Board) ....................................................................................... 2 − 80
2.12.2. OPE HUB PBA........................................................................................................... 2 − 85
2.12.3. SMPS (Switching Mode Power Supply) board .................................................................. 2 − 86
2.12.4. Fuser Drive Board (FDB).............................................................................................. 2 − 88
2.12.5. HVPS board ............................................................................................................... 2 − 89
2.12.6. Eraser PBA ................................................................................................................ 2 − 91
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