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CHAPTER 3 DISASSEMBLY AND ASSEMBLY..................................... 3-1

1. SAFETY PRECAUTIONS............................................................................................3-1

2. PACKING ....................................................................................................................3-2

3. SCREW TORQUE LIST ..............................................................................................3-3

4. LUBRICATION ............................................................................................................3-6

5. OVERVIEW OF GEARS............................................................................................3-12

6. HARNESS ROUTING................................................................................................3-17

7. DISASSEMBLY FLOW ..............................................................................................3-24

8. DISASSEMBLY PROCEDURE .................................................................................3-25

8.1 AC Cord............................................................................................................................ 3-25

8.2 Toner Cartridge ................................................................................................................ 3-25

8.3 Drum Unit ......................................................................................................................... 3-28

8.4 Belt Unit............................................................................................................................ 3-30

8.5 Waste Toner Box.............................................................................................................. 3-30

8.6 Paper Tray........................................................................................................................ 3-31

8.7 DX Feed ASSY (HL-4040CDN/ 4050CDN/ 4070CDW only) ........................................... 3-33

8.8 MP Cover ASSY/ MP Paper Guide ASSY ....................................................................... 3-34

8.9 MP Lift Arm 2/ MP Roller Holder ASSY ........................................................................... 3-37

8.10 Fuser Unit/ Toner Filter Frame ASSY ............................................................................ 3-40

8.11 Back Cover Upper.......................................................................................................... 3-42

8.12 Paper Eject ASSY DX/SX .............................................................................................. 3-43

8.13 Back Cover ASSY .......................................................................................................... 3-45

8.14 Paper Guide DX/ HV TR Top Cover .............................................................................. 3-46

8.15 Transfer HVPS PCB Unit ............................................................................................... 3-47

8.16 Registration-mark Sensor PCB ASSY 1, 2/ Density Sensor/ Registration Relay PCB

ASSY/ Transfer HVPS PCB ASSY ................................................................................ 3-48

8.17 Side Cover L ASSY ........................................................................................................ 3-54

8.18 Side Plate LB.................................................................................................................. 3-55

8.19 Drum Unit Fan (OPC)..................................................................................................... 3-56

8.20 Side Cover R ASSY ....................................................................................................... 3-57

8.21 Roller Holder ASSY........................................................................................................ 3-58

8.22 Paper Feed Frame Unit/ T1 PE/Edge Sensor PCB ASSY ............................................ 3-59

8.23 Belt Cleaner Release Sensor PCB ASSY...................................................................... 3-67

8.24 THM/HUM Sensor Holder ASSY ................................................................................... 3-68

8.25 Release Rack ................................................................................................................. 3-70

8.26 Front Door Unit ASSY .................................................................................................... 3-71

8.27 Harness Cover MP......................................................................................................... 3-74

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