Brother DCP-7450 Manuals

Manuals and User Guides for Brother DCP-7450. We have 1 Brother DCP-7450 manual available for free PDF download: Service Manual

Brother DCP-7450 Service Manual

Brother DCP-7450 Service Manual (315 pages)

Laser Multi-Function Center

Brand: Brother | Category: All in One Printer | Size: 12.87 MB

Table of Contents

Service Manual
1
Table of Contents
5
Regulation

10
- Internal Laser Radiation
  11
- Additional Information
  14
Safety Information

14
Chapter 1 Troubleshooting

19
- Introduction
  19
  - Precautions
    19
  - Part Names
    20
  - Initial Check
    22
- Error Cause
  24
  - Error Indication
    24
  - Error Code Cause and Remedy
    25
    
    Recoverable User Check Errors
    25
    
    Service Call Error
    25
    
    Error Code
    26
- Paper Feeding Problems
  41
  - No Feeding
    41
  - Double Feeding
    41
  - Paper Jam
    42
  - Dirt on Paper
    43
  - Wrinkles or Creases
    43
  - Waves in the Paper / Folds in the Paper at the Eject Roller 2
    43
  - Curl in the Paper
    44
- Troubleshooting of Document Feeding
  45
  - No Feeding
    45
  - Double Feeding
    45
  - Paper Jam
    46
- IMAGE DEFECT TROUBLESHOOTING (Defect of the Print)
  47
  - Image Defect Examples
    47
  - Diameter of Rollers
    47
  - Troubleshooting Image Defect
    48
    
    Faulty Registration
    49
    
    White Spots
    56
    
    Black Spots
    58
    
    Horizontal Lines
    59
- Troubleshooting of Scannig
  61
- Software Setting Problems
  63
- Network Problems
  64
- Troubleshooting of the Communications Error
  65
- Troubleshooting of the Control Panel
  69
- Troubleshooting of Fax Functions
  71
- Others Problems
  75
Chapter 2 Periodical Maintenance

77
- Consumable Parts
  77
- Periodical Peplacement Parts
  78
Chapter 3 Disassembly and Assembly

79
- Safety Precautions
  79
- Packing
  80
- Screw Torque List
  81
- Lubrication
  83
- Overview of Gears
  86
- Harness Routing
  87
- Disassembly Flow
  93
- Disassembly Procedure
  94
  - Separation Pad Assy
    95
  - Front Cover Assy
    96
    
    Paper Stopper L / Paper Stopper S
    98
  - Back Cover / Outer Chute Assy
    99
    
    Back Cover
    99
    
    Outer Chute Assy
    100
  - Fuser Cover Assy
    101
    
    Eject Actuator / Eject Actuator Spring
    102
    
    Eject Roller Assy 1 / Bush C / Bush R / Bush L
    103
  - Joint Cover Sub Chute Assy
    104
  - Inner Chute Assy
    105
  - Fuser Unit
    106
  - Corner Cover
    108
  - Side Cover L Assy / Side Cover Sub L
    109
    
    Side Cover L Assy
    109
    
    Side Cover Sub L
    110
  - Main Shield Cover Plate
    110
  - Adf Unit
    111
    
    Hinge R / Hinge Arm / Hinge Assy L
    113
    
    Adf Cover Assy
    114
    
    Gear Cover
    114
    
    Document Separator Roller Shaft Assy
    115
    
    Upper Document Chute Assy
    116
    
    Lower Document Chute Assy
    118
    
    Adf Sensor Pcb Assy
    119
    
    Lf Roller Assy
    121
    
    10Ejection Roller Assy
    122
    
    11Drive Frame Assy
    123
    
    12Adf Motor
    124
    
    13Pressure Roller Assy
    125
    
    14Document Stopper
    126
    
    15Document Dress Cover
    127
  - Document Scanner Unit
    128
    
    Cord Hook
    130
    
    Panel Unit
    130
    
    Panel Pcb Assy
    131
    
    Rubber Keys L/R
    131
    
    Lcd
    132
    
    Panel Dress Cover
    132
    
    Address Label
    133
  - Pull Arm L/R
    134
  - Pull Arm Guide
    135
  - Ncu Pcb
    136
  - Speaker Unit
    137
  - Battery Assy
    139
  - Side Cover R Assy
    140
  - Registration Grounding Spring
    141
  - Roller Holder Assy
    142
  - WIRELESS LAN PCB ASSY (Only MFC7840W)
    144
  - Main Pcb Assy
    145
  - Joint Cover Assy / Paper Supporter
    146
  - Eject Roller Assy 2
    147
  - High-Voltage Ps Pcb Assy
    148
  - New Toner Sensor Harness Assy
    149
  - Filter Assy
    150
  - Laser Unit
    151
  - Fan Motor 60 Unit / Cover Sensor Harness Assy / Toner Led Pcb Assy
    153
    
    Fan Motor 60 Unit
    153
    
    Cover Sensor Harness Assy
    154
    
    Toner Led Pcb Assy
    155
  - Lvps
    156
    
    Lvps Pcb Unit
    156
    
    Lv Shield Plate 2
    158
  - Registration Front Sensor Pcb Assy
    159
  - Registration Rear Sensor Pcb Assy
    163
  - Drive Sub Assy
    166
  - Dev Joint / Dev Gear Joint/53R / Registration Pendulum Gear Spring
    168
  - Thermistor Harness Unit
    169
  - Toner Sensor Pcb Unit Assy
    170
  - Registration Solenoid / T1 Solenoid
    171
    
    Registration Solenoid
    171
    
    T1 Solenoid
    173
  - Main Shield Plate / Eject Sensor Pcb Assy
    174
  - Rubber Foot
    178
  - Main Frame L Assy
    179
Chapter 4 Adjustments and Updating of Settings, Required after Parts Replacement

184
- If You Replace the Main Pcb
  184
- If You Replace the Wireless Lan Pcb
  194
- If You Replace the Laser Unit
  195
- If You Replace the Fb Unit
  196
Chapter 5 Service Functions

197
- Maintenance Mode
  197
- Other Service Functions
  231
  - User Maintenance Mode
    231
  - Resetting the Developing Bias Voltage Counter
    232
Chapter 6 Circuit Diagrams, Wiring Diagram

233
APPENDIX 1 WORKER SWITCH Settings (WSW)

240

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