Samsung ProXpress M453x series Service Manual page 3

2.7.2. Laser Scanning Optical path .......................................................................................... 2 − 30
2.8. Drive System .......................................................................................................................... 2 − 31
2.8.1. Drive Motors .............................................................................................................. 2 − 31
2.8.2. Main Drive Unit.......................................................................................................... 2 − 33
2.8.3. Exit Drive Unit ........................................................................................................... 2 − 34
2.8.4. Tray Lifting Drive Unit................................................................................................. 2 − 35
2.9. Hardware Configuration ............................................................................................................ 2 − 36
2.9.1. Main board................................................................................................................. 2 − 38
2.9.2. MSOK ...................................................................................................................... 2 − 40
2.9.3. SO-DIMM PBA .......................................................................................................... 2 − 41
2.9.4. USB Host PBA ........................................................................................................... 2 − 42
2.9.5. SMPS board ............................................................................................................... 2 − 43
2.9.6. Fuser Drive Board (FDB).............................................................................................. 2 − 45
2.9.7. HVPS board ............................................................................................................... 2 − 47
2.9.8. SCF board.................................................................................................................. 2 − 48
2.9.9. Eraser PBA ................................................................................................................ 2 − 49
2.9.10. Cover-Open PBA ........................................................................................................ 2 − 49
2.9.11. Deve_Toner Crum Joint PBA......................................................................................... 2 − 50
2.9.12. Toner Remain Sensor PBA ............................................................................................ 2 − 50
2.9.13. Joint PBA .................................................................................................................. 2 − 51
2.9.14. EEPROM PBA ........................................................................................................... 2 − 52
2.9.15. CRUM PBA ............................................................................................................... 2 − 52
3. Disassembly and Reassembly ................................................................................................................3 − 1
3.1. Precautions when replacing parts ..................................................................................................3 − 1
3.1.1. Precautions when assembling and disassembling .................................................................3 − 1
3.1.2. Precautions when handling PBA.......................................................................................3 − 1
3.1.3. Releasing Plastic Latches ................................................................................................3 − 2
3.2. Replacing the maintenance part ....................................................................................................3 − 3
3.2.1. Fuser Unit ....................................................................................................................3 − 3
3.2.2. Transfer Roller..............................................................................................................3 − 4
3.2.3. Pick-Up_Forward roller ..................................................................................................3 − 5
3.2.4. SCF Separation Roller ....................................................................................................3 − 6
3.2.5. SCF Pick-up Roller and Forward Roller.............................................................................3 − 7
3.3. Replacing the main SVC part .......................................................................................................3 − 8
3.3.1. Rear Cover...................................................................................................................3 − 8
3.3.2. Front Cover ..................................................................................................................3 − 9
3.3.3. Right_Left Cover ........................................................................................................ 3 − 10
3.3.4. Top Cover .................................................................................................................. 3 − 11
3.3.5. OPE Unit ................................................................................................................... 3 − 12
3.3.6. HDD (Hard Disk Drive)................................................................................................ 3 − 13
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