Samsung ML-451 Series Service Manual page 3

2.2.7. Fuser Unit .................................................................................................................. 2 − 27
2.2.7.1.
2.2.7.2.
2.2.7.3.
2.2.7.4.
2.2.8. Laser Scanning Unit..................................................................................................... 2 − 30
2.2.8.1.
2.2.8.2.
2.2.9. Drive System.............................................................................................................. 2 − 32
2.2.9.1.
2.2.9.2.
2.2.9.3.
2.2.9.4.
2.2.10. Hardware Configuration................................................................................................ 2 − 37
2.2.10.1. Main Controller ............................................................................................ 2 − 41
2.2.10.2. OPE Controller ............................................................................................. 2 − 45
2.2.10.3. SMPS and FDB Board ................................................................................... 2 − 48
2.2.10.4. HVPS Board ................................................................................................ 2 − 51
2.2.10.5. Eraser PBA .................................................................................................. 2 − 52
2.2.10.6. Cover-Open PBA .......................................................................................... 2 − 52
2.2.10.7. Joint PBA .................................................................................................... 2 − 53
2.2.10.8. Deve Crum Joint PBA.................................................................................... 2 − 53
2.2.10.9. Toner Crum Joint PBA ................................................................................... 2 − 54
2.2.10.10. Toner Crum PBA .......................................................................................... 2 − 54
2.2.10.11. Deve Crum PBA ........................................................................................... 2 − 54
2.2.11. Finisher ..................................................................................................................... 2 − 55
2.2.11.1. Finisher System Configuration ......................................................................... 2 − 55
2.2.11.2. Layout and Paper path.................................................................................... 2 − 56
2.2.11.3. Electrical parts location .................................................................................. 2 − 57
2.2.11.4. Finisher main board ....................................................................................... 2 − 58
2.2.12. Mail box .................................................................................................................... 2 − 59
2.2.12.1. Mail box layout............................................................................................. 2 − 59
2.2.12.2. Electrical parts location .................................................................................. 2 − 60
2.2.12.3. Mail box main board...................................................................................... 2 − 61
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. Preautions when handling PBA ........................................................................................3 − 1
3.1.3. Releasing Plastic Latches ................................................................................................3 − 2
3.2. Screws used in the printer............................................................................................................3 − 3
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Fuser Unit Overview...................................................................................... 2 − 27
Fuser Unit Main Components .......................................................................... 2 − 28
Fuser Drive .................................................................................................. 2 − 28
Temperature Contorl ...................................................................................... 2 − 29
Laser Scanning Unit Overview ........................................................................ 2 − 30
Laser Scanning Optical Path............................................................................ 2 − 31
Drive Motors................................................................................................ 2 − 32
Main Drive Unit(OPC, DEVE, Toner, Fuser, Regi.) ............................................. 2 − 34
Exit Drive Unit ............................................................................................. 2 − 35
Tray Lifting Drive Unit .................................................................................. 2 − 36
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