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Brother MFC-J6720DW Service Manual

Brother MFC-J6720DW
365 pages
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Confidential
MODELS: MFC-J3520/J3720
MFC-J6520DW/J6720DW
MFC-J6920DW/J6925DW
Brother Inkjet MFC
SERVICE MANUAL
June 2013
SM-FAX145
8CAT*
(5)
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.

Table of Contents

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Brother MFC-J6720DW Specifications

General IconGeneral
Duplex printingYes
Print technologyInkjet
Maximum resolution6000 x 1200 DPI
Duplex printing modeAuto
Print speed (ISO/IEC 24734) mono22 ipm
Print speed (ISO/IEC 24734) color20 ipm
Print speed (black, normal quality, A4/US Letter)35 ppm
Print speed (color, normal quality, A4/US Letter)27 ppm
Copier resize25 - 400 %
Maximum copy resolution1200 x 2400 DPI
Maximum number of copies99 copies
N-in-1 copy function (N=)2, 4
Copy speed (black, normal quality, A4)23 cpm
Copy speed (color, normal quality, A4)20 cpm
Scan toCIFS, E-mail, E-mail Server, Fax, File, FTP, Image, Memory Card, OCR, USB
Scan driversICA, TWAIN, WIA
Scanner typeFlatbed & ADF scanner
Grayscale levels256
Input color depth48 bit
Maximum scan area297 x 432 mm
Output color depth24 bit
Image formats supportedBMP, JPG, PCX, PNG, TIF
Maximum scan resolution19200 x 19200 DPI
Document formats supportedHTM, PDF
Optical scanning resolution2400 x 2400 DPI
FaxingColor faxing
Fax memory200 pages
Modem speed33.6 Kbit/s
Fax resolution (black)203 x 196 DPI
Fax transmission speed3 sec/page
Digital senderNo
Printing colorsBlack, Cyan, Magenta, Yellow
Maximum duty cycle26000 pages per month
Recommended duty cycle250 - 1500 pages per month
Number of print cartridges4
Page description languagesGDI
Paper input typePaper tray
Total input capacity500 sheets
Total output capacity50 sheets
Total number of input trays2
Multi-Purpose tray input capacity1 sheets
Auto document feeder (ADF) input capacity35 sheets
Envelopes sizes10, C5, DL, Monarch
Photo paper sizes10x15 cm
Custom media width89 - 297 mm
Maximum print size210 x 297 mm
Custom media length127 - 431.8 mm
Paper tray media typesCoated paper, Glossy paper, Plain paper, Transparencies
Non-ISO print media sizes2L, Executive (184 x 267mm), Folio (media size), Index card, L, Ledger (media size), Letter (media size)
ISO A-series sizes (A0...A9)A3, A4, A5, A6
Photo paper sizes (imperial)4x6 \
Borderless printing media sizesLedger, 4x6, 10x15, 2L, A3, A4, A6, Index card, L, Letter
Maximum ISO A-series paper sizeA4
DisplayLCD
Control typeTouch
Product colorBlack, White
Display diagonal2.7 \
Market positioningBusiness
Standard interfacesEthernet, USB 1.1, USB 2.0, Wireless LAN
USB 2.0 ports quantity1
Fax compatibilityITU-T G3
Wi-Fi standards802.11b, 802.11g, Wi-Fi 4 (802.11n)
Security algorithms128-bit WEP, 64-bit WEP, SSID, TKIP, WPA-AES, WPA-PSK, WPA-TKIP, WPA2-AES, WPA2-PSK
Mobile printing technologiesApple AirPrint, Brother iPrint & Scan, Google Cloud Print
Compatible memory cardsmicroSD (TransFlash), microSDHC, miniSD, miniSDHC, MMC, MMC Mobile, MMC+, MS Duo, MS Micro (M2), MS PRO Duo, SD, SDHC, SDXC
Sound pressure level (printing)50 dB
AC input frequency50 - 60 Hz
Power consumption (off)0.04 W
Power consumption (standby)4.5 W
Power consumption (PowerSave)1.5 W
Power consumption (average operating)28 W
Package depth497.84 mm
Package width657.86 mm
Package height414 mm
Package weight19912 g
Storage temperature (T-T)10 - 35 °C
Operating relative humidity (H-H)20 - 80 %
Mac operating systems supportedMac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion
Windows operating systems supportedWindows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
Sustainability certificatesBlue Angel, ENERGY STAR
Weight and Dimensions IconWeight and Dimensions
Depth433 mm
Width553 mm
Height310 mm

Summary

CHAPTER 1 SPECIFICATIONS

1 GENERAL

General specifications including model, droplet size, scanning method, CPU, and backup clock.

1.2 Media Specification

Details on media sizes, weights, and types supported by each model and tray.

1.3 Paper Handling

Specifications for paper input capacity for various paper types and trays.

1.10 PAPER

Detailed information on paper types, sizes, weights, and printable areas.

CHAPTER 2 TROUBLESHOOTING

3 ERROR INDICATION

Details error codes, their causes, and solutions for quick problem identification.

4 TROUBLESHOOTING

Comprehensive guide to diagnosing and resolving various machine issues.

4.1 Error Cause and Solutions

Specific solutions for identified error codes and common problems.

4.2 Recording Paper Feeding Problems

Troubleshooting steps for issues related to paper feeding from trays or ADF.

4.7 Document Feeding Problems

Troubleshooting steps for issues with document feeding and jamming in the ADF.

4.10 Other Problems

Troubleshooting for miscellaneous machine issues like power, memory, or sound problems.

CHAPTER 3 DISASSEMBLY AND ASSEMBLY

1 PRECAUTIONS BEFORE PROCEEDING

Essential safety warnings and precautions for disassembly and assembly work.

9 DISASSEMBLY PROCEDURE

Step-by-step instructions for disassembling various machine components.

CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT

1 IF YOU REPLACE THE MAIN PCB ASSY

Operations required after replacing the main PCB assembly, including firmware and data updates.

2 IF YOU REPLACE THE HEAD/CARRIAGE UNIT

Operations required after replacing the head/carriage unit, including calibration and purging.

6 IF YOU REPLACE THE PAPER FEEDING RELATED PARTS and MAINTENANCE UNIT

Operations required after replacing paper feeding parts or maintenance unit, including nozzle checks.

CHAPTER 5 SERVICE FUNCTIONS

1 MAINTENANCE MODE

Overview and detailed procedures for accessing and using the maintenance mode.

1.3 Detailed Description of Maintenance-mode Functions

In-depth explanations of specific maintenance modes and their operations.

2 OTHER SERVICE FUNCTIONS

Other service functions available, such as displaying firmware version and moving the head/carriage unit.

APPENDIX 1. SERIAL NUMBERING SYSTEM

(1) Serial number label for the machine itself

Explains the format and location of the machine's serial number label.

APPENDIX 2. DELETION OF USER SETTING INFORMATION

A2.1 DELETING USER SETTING INFO FROM THE MACHINE

Step-by-step instructions to delete user settings recorded in the EEPROM.

APPENDIX 3. INSTALLING THE MAINTENANCE PRINTER DRIVER

Windows Vista/Windows 7/Windows 8

Instructions for installing the maintenance printer driver on Windows Vista, 7, and 8.

APPENDIX 4. REPLACEMENT OF CONDENSER ON THE MAIN PCB

A4.1 HOW TO JUDGE CONDENSER DEFECTIVE

Procedure to diagnose if a power-on failure is due to a defective condenser.

A4.2 HOW TO REPLACE CONDENSER

Step-by-step guide for replacing a condenser on the main PCB, including tools and solder list.

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