Brother MFC-9440CN - Brother Limited Warranty Information (USA); Warranty Coverage: Who is Covered; Warranty Coverage: What is Covered; Warranty Periods

iv Confidential
2.2.3 Paper Feeding Kit (PF Kit1, PF Kit2) ..................................................................... 2-30
2.2.4 MP Paper Feeding Kit (PF Kit MP) ........................................................................ 2-35
2.3 Parts Life Reset Function................................................................................................. 2-40
CHAPTER 3 DISASSEMBLY AND ASSEMBLY..................................... 3-1
1. SAFETY PRECAUTIONS............................................................................................3-1
2. PACKING ....................................................................................................................3-2
3. SCREW TORQUE LIST ..............................................................................................3-3
4. LUBRICATION ............................................................................................................3-7
5. OVERVIEW OF GEARS............................................................................................3-13
6. HARNESS ROUTING................................................................................................3-18
7. DISASSEMBLY FLOW..............................................................................................3-28
8. DISASSEMBLY PROCEDURE .................................................................................3-29
8.1 Paper Tray........................................................................................................................ 3-29
8.2 DX Feed ASSY (DCP-9042CDN/ MFC-9450CDN only).................................................. 3-31
8.3 MP Cover ASSY/ MP Paper Guide ASSY ....................................................................... 3-32
8.4 MP Lift Arm 2/ MP Roller Holder ASSY ........................................................................... 3-35
8.5 Fuser Unit/ Toner Filter Frame ASSY .............................................................................. 3-37
8.6 Back Cover Upper............................................................................................................ 3-39
8.7 Paper Eject ASSY DX/SX ................................................................................................. 3-40
8.8 Back Cover ASSY ............................................................................................................ 3-43
8.9 Paper Guide DX/ HV TR Top Cover ................................................................................ 3-44
8.10 Transfer HVPS PCB Unit ............................................................................................... 3-45
8.11 Registration-mark Sensor PCB ASSY 1, 2/ Density Sensor/ Registration Relay PCB
ASSY/ Transfer HVPS PCB ASSY ................................................................................ 3-46
8.12 Side Cover L ASSY........................................................................................................ 3-52
8.13 Side Plate LB.................................................................................................................. 3-53
8.14 Drum Unit Fan (OPC)..................................................................................................... 3-54
8.15 Side Cover R ASSY ....................................................................................................... 3-55
8.16 Paper Stopper ................................................................................................................ 3-56
8.17 Driver PCB ASSY........................................................................................................... 3-57
8.18 Document Scanner Unit ................................................................................................. 3-59
8.19 ADF Unit......................................................................................................................... 3-62
8.20 Panel Unit....................................................................................................................... 3-75
8.21 NCU PCB ASSY (MFC-9440CN/ 9450CDN only) ......................................................... 3-79
8.22 Joint Cover ASSY........................................................................................................... 3-81
8.23 Roller Holder ASSY........................................................................................................ 3-90
8.24 Paper Feed Frame Unit/ T1 PE/Edge Sensor PCB ASSY ............................................ 3-91
8.25 Belt Cleaner Release Sensor PCB ASSY...................................................................... 3-99
8.26 THM/HUM Sensor Holder ASSY ................................................................................. 3-100