Brother MFC-B7720DN Manuals

Manuals and User Guides for Brother MFC-B7720DN. We have 4 Brother MFC-B7720DN manuals available for free PDF download: Service Manual, Reference Manual, Quick Start Manual

Brother MFC-B7720DN Service Manual (340 pages)

Laser MFC

Brand: Brother | Category: All in One Printer | Size: 24.73 MB

Table of Contents
4
Safety Information

10
Chapter 1 Supplemental Specifications

17
General

17
Network Connectivity

25
Service Information

26
Supplies

28
Media Specifications

36
Fax (Only for the Models with Fax Function)

37
Copy

38
Scanner

40
Chapter 2 Error Indications and Troubleshooting

41
Introduction

41
- Precautions
  41
- Checks before Commencing Troubleshooting
  43
Overview

45
- Cross-Section Drawing
  45
  - Printer Part
    45
  - Scanner Part
    47
- Paper Feeding
  49
  - Printer Part
    49
  - Scanner Part
    51
- Operation of each Part and Location of Parts
  52
- Block Diagram
  54
- Main Components
  55
Error Indications

57
- Error Codes
  58
- Error Message
  65
  - LCD Models
    65
  - Touch Panel Models
    74
- Communication Errors
  83
Troubleshooting

87
- Error Cause and Remedy
  87
- Troubleshooting for Paper Feeding Problems
  113
  - No Paper Feeding from Paper Tray
    113
  - No Paper Feeding from MP Tray
    114
  - No Paper Feeding from Manual Feed Slot
    115
  - Multiple Sheets of Paper Are Fed
    115
  - Paper Becomes Wrinkled
    116
  - Paper Is Fed at an Angle
    116
  - Paper Curls
    117
  - Unable to Perform 2-Sided Printing
    117
  - Paper Jam
    118
- Troubleshooting for Image Defects
  123
  - Image Defect Examples
    123
  - Troubleshooting Image Defect
    124
- Troubleshooting for Software Problems
  138
  - Unable to Receive Data
    138
- Troubleshooting for Network Problems
  139
  - Cannot Make a Print through Network Connection
    139
  - Cannot Connect to Access Point
    139
- Troubleshooting for Control Panel Problems
  140
- Troubleshooting for Toner Cartridge and Drum Unit Problems
  141
- Troubleshooting for Fuser Unit Problems
  143
  - Fuser Unit Failure
    143
- Troubleshooting for Laser Unit Problems
  143
  - Laser Unit Failure
    143
- Troubleshooting for PCB Problems
  144
  - Main PCB Failure
    144
  - Full Memory
    144
- Troubleshooting for Document Feeding Problems
  145
  - No Document Is Fed
    145
  - Multiple Documents Are Fed
    145
  - Document Jam
    146
  - Document Becomes Wrinkled
    147
  - Document Size Is Not Detected Correctly
    147
- Troubleshooting for Scanning Image Defect
  148
- Troubleshooting for Fax/Phone Problems
  153
  - Fax Cannot be Sent
    153
  - Fax Cannot be Received
    154
  - Communication Error Occurs
    154
  - Receive Buffer Full During Receiving into Memory
    154
- Troubleshooting for Other Problems
  155
Chapter 3 Disassembly/Reassembly

158
Safety Precautions

158
Packing

159
Screw Catalogue

160
Screw Torque List

161
Lubrication

163
Overview of Gears

164
Harness Routing

166
Disassembly Flow Chart

179
Disassembly Procedure

180
- Preparation
  180
- Cord Hook
  182
- Back Cover
  183
- Outer Chute ASSY
  184
- Front Cover ASSY / Support Flap
  185
- Side Cover R
  188
- Fuser Cover
  189
- Inner Chute ASSY
  190
- Side Cover L / Speaker Harness ASSY / Handset Holder ASSY (for Models with Handset)
  191
- Document Scanner Unit
  194
- ADF Unit (for Models with ADF)
  197
- Document Cover ASSY (for Models Without ADF)
  210
- Panel Unit (for Touch Panel Models)
  212
  - Panel Unit
    212
  - Panel PCB ASSY / NFC PCB ASSY / LCD
    213
  - Touch Panel ASSY
    214
- Panel Unit (for Non-Touch Panel Models)
  215
  - Panel Unit
    215
  - Panel PCB ASSY
    216
  - Lcd
    217
- Panel Flat Cable / First Side CIS Unit / First Side CIS Flat Cable
  218
- Modem Flat Cable / Modem PCB ASSY
  225
- Joint Cover ASSY
  227
- Fuser Unit
  228
- Low-Voltage Power Supply PCB ASSY
  230
- New Toner Sensor PCB ASSY
  232
- HVPS Flat Cable / High-Voltage Power Supply PCB ASSY
  233
- Fan
  235
- Toner Box Relay PCB ASSY (for Models with Toner Box)
  236
  - MP Relay PCB ASSY (for MP Models)
    236
  - Toner Box New PCB ASSY (for Models with Toner Box)
    236
- Laser Unit Flat Cable / Laser Unit
  238
- Filter
  240
- Wireless LAN PCB (Only for Wireless Network Models)
  241
- Roller Holder ASSY
  242
- Main PCB ASSY
  243
- T1 Clutch / Registration Clutch
  244
- Frame L Unit
  247
- Paper Feed Motor / Paper Feed Motor Flat Cable
  250
- Fuser Gear 64R/36R
  252
- Toner Sensor PCB ASSY (Only for Models with Toner Box)
  253
- Front Cover Sensor
  254
- Eject Sensor PCB ASSY
  255
- Registration Front/Rear Actuator Holder ASSY
  257
- Paper Feed Roller ASSY / Paper Feed Sensor PCB ASSY
  260
Chapter 4 Adjusting and Updating Settings as Required after Parts Replacement

261
If You Replace the Main Pcb Assy

261
If You Replace the Low-Voltage Power Supply Pcb Assy

267
- Reset Irregular Power Supply Detection Counter of the Low-Voltage Power Supply PCB (Function Code 88)
  267
If You Replace the Laser Unit

268
- Entering Adjusted Value of Laser Unit
  269
If You Replace the Panel Unit or Panel Control Pcb

271
- Adjusting Touch Panel (Function Code 61) (Touch Panel Models Only)
  271
- Checking LCD Operation (Function Code 12)
  271
If You Replace the Adf Unit, First Side Cis Unit, Second Side Cis Unit or Document Scanner Unit

272
- Acquiring White Level Data (Function Code 55)
  272
- Scanning and Printing Check
  272
Chapter 5 Service Functions

273
Function Code

273
Other Service Functions

331
- Drum Cleaning
  331
- Print Communication Error List
  333
- Resetting Drum Counter
  334
Chapter 6 Wiring Diagram

335
- Wiring Diagram
  335
Chapter 7 Periodical Maintenance

336
Periodical Replacement Parts

336
Appendix 1 Serial Numbering System

337
Appendix 2 Deleting User Setting Information

338
Appendix 3 Installing the Maintenance Printer Driver

339

Brother MFC-B7720DN Service Manual (119 pages)

Laser MFC

Brand: Brother | Category: All in One Printer | Size: 6.6 MB

Brother MFC-B7720DN Reference Manual (19 pages)

Brand: Brother | Category: Scanner | Size: 1.55 MB

Table of Contents
6
General Information

7
- Control Panel Overview
  7
Load Paper

13
- Load Paper in the Paper Tray
  13
- Load Paper in the Manual Feed Slot
  13
Troubleshooting

14
- Identify the Problem
  14
- Error and Maintenance Messages
  15
- Document and Paper Jams
  16
Appendix

17
- Supplies
  17
- Print and Scan Using Your Mobile Device
  18

Brother MFC-B7720DN Quick Start Manual (2 pages)

Brand: Brother | Category: All in One Printer | Size: 2.24 MB

Brother Categories

Sewing Machine

All in One Printer

Printer Label Maker Fax Machine

More Brother Manuals

Brother MFC-B7720DN Manuals

Brother MFC-B7720DN Service Manual (340 pages)

Table of Contents

Safety Information

Chapter 1 Supplemental Specifications

General

Network Connectivity

Service Information

Supplies

Media Specifications

Fax (Only for the Models with Fax Function)

Copy

Scanner

Chapter 2 Error Indications and Troubleshooting

Introduction

Overview

Error Indications

Troubleshooting

Chapter 3 Disassembly/Reassembly

Safety Precautions

Packing

Screw Catalogue

Screw Torque List

Lubrication

Overview of Gears

Harness Routing

Disassembly Flow Chart

Disassembly Procedure

Chapter 4 Adjusting and Updating Settings as Required after Parts Replacement

If You Replace the Main Pcb Assy

If You Replace the Low-Voltage Power Supply Pcb Assy

If You Replace the Laser Unit

If You Replace the Panel Unit or Panel Control Pcb

If You Replace the Adf Unit, First Side Cis Unit, Second Side Cis Unit or Document Scanner Unit

Chapter 5 Service Functions

Function Code

Other Service Functions

Chapter 6 Wiring Diagram

Chapter 7 Periodical Maintenance

Periodical Replacement Parts

Appendix 1 Serial Numbering System

Appendix 2 Deleting User Setting Information

Appendix 3 Installing the Maintenance Printer Driver

Brother MFC-B7720DN Service Manual (119 pages)

Brother MFC-B7720DN Reference Manual (19 pages)

Table of Contents

General Information

Load Paper

Troubleshooting

Appendix

Brother MFC-B7720DN Quick Start Manual (2 pages)

Related Products

Brother Categories