Brother MFC-L6902DW - Page 6

iii
Confidential
4.13.3 Communication error occurs .............................................................................. 2-123
4.14 Troubleshooting for Other Problems ............................................................................... 2-124
4.14.1 Cannot print ........................................................................................................ 2-124
4.14.2 Cannot update firmware ..................................................................................... 2-124
4.14.3 USB direct interface errors ................................................................................. 2-124
4.14.4 "Paper Low" message does not disappear ......................................................... 2-125
CHAPTER 3 DISASSEMBLY/REASSEMBLY
1. SAFETY PRECAUTIONS ............................................................................................................ 3-1
2. PACKING .................................................................................................................................... 3-2
3. SCREW CATALOGUE ................................................................................................................ 3-3
4. SCREW TORQUE LIST .............................................................................................................. 3-4
5. LUBRICATION ............................................................................................................................ 3-7
6. OVERVIEW OF GEARS .............................................................................................................. 3-9
7. HARNESS ROUTING ................................................................................................................ 3-11
8. DISASSEMBLY FLOW CHART ................................................................................................ 3-24
8.1 Machine ............................................................................................................................ 3-24
8.2 LT ..................................................................................................................................... 3-26
9. DISASSEMBLY PROCEDURE ................................................................................................. 3-27
9.1 Preparation ....................................................................................................................... 3-27
9.2 Paper tray ......................................................................................................................... 3-28
9.3 Back cover / Outer chute .................................................................................................. 3-30
9.4 Fuser cover ....................................................................................................................... 3-31
9.5 Fuser unit .......................................................................................................................... 3-32
9.6 MP cover ASSY ................................................................................................................ 3-35
9.7 Front cover ASSY ............................................................................................................. 3-37
9.8 Side cover L ...................................................................................................................... 3-38
9.9 Side cover R ..................................................................................................................... 3-39
9.10 ADF/document scanner unit ............................................................................................. 3-40
9.11 ADF unit ............................................................................................................................ 3-43
9.11.1 ADF unit ............................................................................................................... 3-43
9.11.2 Hinge L ASSY, Hinge R, Hinge R support, Hinge arm R ..................................... 3-45
9.11.3 ADF cover ASSY, Document stopper .................................................................. 3-46
9.11.4 Gear cover, ADF front cover, Document sub tray ................................................ 3-47
9.11.5 Document separate roller ASSY .......................................................................... 3-49
9.11.6 ADF separation holder ASSY ............................................................................... 3-50
9.11.7 Second side CIS unit, Second side CIS flat cable
(Models with duplex printing only) ........................................................................ 3-51
9.12 Panel unit .......................................................................................................................... 3-56
9.12.1 Panel unit ............................................................................................................. 3-56