Samsung CLX-8640 series Service Manual page 4

Contents
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. Drum Unit....................................................................................................................3 − 3
3.2.2. Developer Unit .............................................................................................................3 − 4
3.2.3. ITB Unit ......................................................................................................................3 − 6
3.2.4. Fuser Unit ....................................................................................................................3 − 7
3.2.5. Transfer Roller..............................................................................................................3 − 7
3.2.6. Pick-Up_Reverse_Forward roller......................................................................................3 − 8
3.2.7. DADF Pick-up roller Assy ..............................................................................................3 − 9
3.2.8. DADF Reverse roller Assy ............................................................................................ 3 − 10
3.2.9. MP Rollers................................................................................................................. 3 − 10
3.3. Replacing the main SVC part ..................................................................................................... 3 − 15
3.3.1. Left Cover.................................................................................................................. 3 − 15
3.3.2. Rear Cover................................................................................................................. 3 − 15
3.3.3. HVPS........................................................................................................................ 3 − 16
3.3.3.1.
3.3.3.2.
3.3.4. Temperature Sensor ..................................................................................................... 3 − 17
3.3.5. ITB Waste Auger Drive Unit ......................................................................................... 3 − 17
3.3.6. LSU.......................................................................................................................... 3 − 18
3.3.7. Main board................................................................................................................. 3 − 19
3.3.8. SMPS board ............................................................................................................... 3 − 19
3.3.9. Main Drive Unit.......................................................................................................... 3 − 20
3.3.10. SMPS shield............................................................................................................... 3 − 20
3.3.11. CST Lift Drive unit...................................................................................................... 3 − 21
3.3.12. Fuser Drive Board ....................................................................................................... 3 − 21
3.3.13. Paper Size Sensor ........................................................................................................ 3 − 22
3.3.14. PH(Paper Handling) Drive Unit...................................................................................... 3 − 22
3.3.15. Fuser Drive Unit ......................................................................................................... 3 − 23
3.3.16. Toner Supply Drive Unit ............................................................................................... 3 − 24
3.3.17. Side Unit ................................................................................................................... 3 − 25
3.3.17.1. MP Pick Up Unit........................................................................................... 3 − 26
3.3.17.2. Duplex Exit Sensor........................................................................................ 3 − 29
3.3.17.3. Duplex Motor ............................................................................................... 3 − 30
3.3.17.4. Duplex Fan .................................................................................................. 3 − 30
3.3.18. Exit Unit.................................................................................................................... 3 − 31
iii
HVPS board1 ............................................................................................... 3 − 16
HVPS board2 ............................................................................................... 3 − 16
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