Disassembly Flowchart - Brother MFC-9420CN Service Manual

Disassembly Flowchart

Basic Operation
5s / 5s 5.1.2 10s / 10s 5.1.3
5.1.1
AC Cord Paper Tray
OPC Belt cartridge
5s / 5s
5.1.60 5.1.12 30s / 30s
Transfer Roller ASSY PU Panel
5.1.16 5s / 5s
Top Side R
30s / 30s
5.1.44
Inner Front Cover PU /
Front Cover PU
15s / 15s 5.1.6 25s / 30s
5.1.5
Side Cover LR Top Side L
5.1.13 10s / 10s
Battery ASSY
5.1.14 30s / 30s
Main PCB
30s / 30s
5.1.15
NCU PCB ASSY
5.1.7 35s / 55s
ADF Unit
45s / 50s
5.1.8
Scanner Unit
5.1.20 25s / 25s
Right Side Cover PU
15s / 15s 5.1.28 20s / 20s
5.1.21
Side Cover LF Cleaning Roller Clutch PU
70s / 90s
5.1.29
Main Motor PU
5.1.30 10s / 10s
Fuser Clutch PU
10s / 10s
5.1.31
TR Cam Clutch
5.1.32 10s / 10s
Registration Clutch PU
5.1.33 10s / 10s
Paper Feed Clutch PU
15s / 20s
5.1.34
Developer Motor PU
5.1.35 30s / 45s
Waste Toner Holder ASSY PU
40s / 40s
5.1.36
Developer Clutch PU
(DCLY/DCLM/DCLC/DCLK)
5.1.40 25s / 25s
Waste Toner Feeder PU
10s / 10s
5.1.42
Right Toner Guide PU
/ Re-Assembly (second)
Disassembly
20s / 10s 50s / 50s
5s / 5s 5.1.4
Fusing Unit Transfer unit PU
5.1.17 15s / 15s 5.1.59 30s / 50s
Cleaning Roller Cover PU / Paper Exit Unit
Cleaning Roller PU
5.1.49 10s / 10s
Scanner Door Sensor
5.1.47 40s / 50s 5.1.48 15s / 15s
Power Supply Fan PU /
Speaker
Interlock Switch PU (Top, Paper Exit) /
Power Supply Fan Duct PU
5.1.46 45s / 50s 5.1.50 60s / 60s
Engine Control Board PU HV Power Supply PU
5.1.51 55s / 60s
LV Power Supply PU /
Power Supply Bracket PU ASSY
10s / 10s
5.1.58
Left Toner Guide PU
45s / 45s 10s / 10s
5.1.18 5.1.19
Top Cover Center Cover
5.1.22 10s / 10s
Interlock Switch PU (Front)
10s / 10s
5.1.23
Waste Toner Auger PU
5.1.25 60s / 60s
Erase Lamp PU
10s / 10s
5.1.26
Marker Sensor
15s / 15s 45s / 50s
5.1.38 5.1.39
OPC Drive Gear ASSY PU Main Drive Gear ASSY PU
40s / 40s 15s / 15s
5.1.37 5.1.41
Developer Gear PU /
Toner Sensor PU (TPD)
Developer Drive ASSY PU
5.1.45 10s / 15s
Right Tray Guide PU
30s / 35s
5.1.43
Laser ASSY PU /
Laser Unit Fan ASSY PU
5 -4
45s / 60s
5.1.9 5.1.10 10s / 10s 5.1.11
Pull Arm/Scanner Slider L, R IS Lock Lever ASSY Tray (TP)
25s / 30s
5.1.61 30s / 30s 5.1.64 5.1.66
Exit Guide ASSY PU /
Transfer Base ASSY PU Exit Roller ASSY PU /
Exit Drive ASSY PU /
Paper Exit Actuator PU
Exit Idle Roller ASSY PU
5.1.65
30s / 30s
5.1.62
Registration Roller ASSY PU
5.1.63 5s / 5s
Registration Actuator PU
5.1.72 15s / 15s 5.1.73 15s / 15s 5.1.74
Paper Guide (A) PU Paper Guide (B) PU
Paper Sensor (PT1, PEU) /
Tray Empty Actuator PU
5.1.52 80s / 80s 5.1.53 40s / 40s 5.1.54
Fuser Connector PU Toner Retract Solenoid PU Toner Sensor PU (TTR)
(DESLY/DESLM/DESLC/DESLK)
50s / 55s
5.1.57 5.1.55
/ Toner Retract Cam PU
Left Tray Guide PU / Toner Present Sensor PU
Paper Size Sensor PU /
5.1.56
Room Temp Thermistor PU
Belt Sensor
10s / 10s
5.1.24
Waste Toner Agitator PU
10s / 10s
5.1.27
Toner Density Sensor PU
5s / 5s
45s / 50s 5s / 5s
5.1.67 5.1.68
Fuser Exit Actuator PU Paper Sensor (PT2)
5s / 5s
5.1.69
Paper Sensor (PFUL)
Discharging Brush PU
5.1.70
Back Cover Latch ASSY PU
50s / 60s 5.1.75 10s / 10s
Paper Guide (C) PU / Paper Guide (D) PU
5.1.71
OHP Sensor PU /
Transfer Roller Guide PU
5.1.76 20s / 20s
Paper Feed Roller /
Separator Pad
15s / 15s
15s / 15s
10s / 10s
Confidential
5s / 5s
20s / 20s
20s / 20s
20s / 20s