Brother DCP-8157DN

iii
Confidential
4.14.1 Machine is not turned ON.................................................................................... 2-97
4.14.2 Main fan does not rotate...................................................................................... 2-97
4.14.3 Main motor failure................................................................................................ 2-97
4.14.4 Unusual noise is generated from the machine .................................................... 2-97
4.14.5 Malfunction of the memory .................................................................................. 2-97
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............................................................................................................. 3-10
7. HARNESS ROUTING................................................................................................................. 3-12
8. DISASSEMBLY FLOW CHART................................................................................................. 3-20
9. DISASSEMBLY PROCEDURE .................................................................................................. 3-22
9.1 Preparation ........................................................................................................................ 3-22
9.2 Paper tray 1 ....................................................................................................................... 3-23
9.3 Back cover / Outer chute ................................................................................................... 3-25
9.4 Fuser cover........................................................................................................................ 3-26
9.5 MP cover ASSY................................................................................................................. 3-27
9.6 Front cover ASSY.............................................................................................................. 3-28
9.7 Side cover L / Access cover .............................................................................................. 3-29
9.8 Side cover R ASSY............................................................................................................ 3-30
9.9 ADF unit............................................................................................................................. 3-31
9.9.1 Hinge ASSY L ..................................................................................................... 3-33
9.9.2 Hinge R ............................................................................................................... 3-33
9.9.3 ADF document output support flap...................................................................... 3-34
9.9.4 Document sub tray .............................................................................................. 3-34
9.9.5 ADF cover ASSY................................................................................................. 3-34
9.9.6 Gear cover........................................................................................................... 3-36
9.9.7 Document separate roller ASSY ......................................................................... 3-37
9.9.8 ADF separation pad spring / ADF separation pad............................................... 3-38
9.9.9 Second side CIS unit /
Second side CIS flat cable (duplex scanning models only)................................. 3-41
9.9.10 Upper ADF chute................................................................................................. 3-43
9.9.11 ADF cover/document detection sensor PCB ASSY /
First side document scanning position sensor PCB ASSY /
Second side document scanning position sensor PCB ASSY
(duplex scanning models only)............................................................................ 3-45
9.9.12 Drive frame ASSY / Document feed roller ASSY 1 ............................................. 3-47
9.9.13 ADF motor ASSY ................................................................................................ 3-52
9.9.14 First side document hold ..................................................................................... 3-52