Brother HL-4040CN Service Manual page 6

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................................................................................................3-14
7. DISASSEMBLY FLOW ..............................................................................................3-21
8. DISASSEMBLY PROCEDURE .................................................................................3-22
8.1 AC Cord............................................................................................................................ 3-22
8.2 Toner Cartridge ................................................................................................................ 3-22
8.3 Drum Unit ......................................................................................................................... 3-25
8.4 Belt Unit............................................................................................................................ 3-27
8.5 Waste Toner Box.............................................................................................................. 3-27
8.6 Paper Tray........................................................................................................................ 3-28
8.7 DX Feed ASSY (HL-4050CDN/ 4070CDW only)............................................................. 3-30
8.8 MP Cover ASSY/ MP Paper Guide ASSY ....................................................................... 3-31
8.9 MP Lift Arm 2/ MP Roller Holder ASSY ........................................................................... 3-34
8.10 Fuser Unit/ Toner Filter Frame ASSY ............................................................................ 3-37
8.11 Back Cover Upper.......................................................................................................... 3-39
8.12 Paper Eject ASSY DX/SX .............................................................................................. 3-40
8.13 Back Cover ASSY .......................................................................................................... 3-42
8.14 Paper Guide DX/ HV TR Top Cover .............................................................................. 3-43
8.15 Transfer HVPS PCB Unit ............................................................................................... 3-44
8.16 Registration-mark Sensor PCB ASSY 1, 2/ Density Sensor/ Registration Relay PCB
ASSY/ Transfer HVPS PCB ASSY ................................................................................ 3-45
8.17 Side Cover L ASSY ........................................................................................................ 3-51
8.18 Side Plate LB.................................................................................................................. 3-52
8.19 Drum Unit Fan (OPC)..................................................................................................... 3-53
8.20 Side Cover R ASSY ....................................................................................................... 3-54
8.21 Roller Holder ASSY........................................................................................................ 3-55
8.22 Paper Feed Frame Unit/ T1 PE/Edge Sensor PCB ASSY ............................................ 3-56
8.23 Belt Cleaner Release Sensor PCB ASSY...................................................................... 3-64
8.24 THM/HUM Sensor Holder ASSY ................................................................................... 3-65
8.25 Release Rack ................................................................................................................. 3-67
8.26 Front Door Unit ASSY .................................................................................................... 3-68
8.27 Harness Cover MP......................................................................................................... 3-71
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