Brother MFC-J6720DW Service Manual

Confidential
4.7.3 Document jam ............................................................................................. 2-75
4.7.4 Wrinkles on documents............................................................................... 2-77
4.7.5 Document size not correctly detected ......................................................... 2-77
4.8 Scanned-image Problems ................................................................................... 2-78
4.8.1 Defective images......................................................................................... 2-78
4.8.2 Troubleshooting from image defect............................................................. 2-78
4.9 Fax Problems ...................................................................................................... 2-83
4.9.1 No faxes can be sent ..................................................................................2-83
4.9.2 No faxes can be received............................................................................ 2-83
4.9.3 A communications error occurs................................................................... 2-84
4.10 Other Problems ................................................................................................... 2-85
4.10.1 The machine cannot be powered ON .........................................................2-85
4.10.2 Memory card/PictBridge does not function (no response) .......................... 2-85
4.10.3 Data of memory card/PictBridge does not read ..........................................2-85
4.10.4 Internal memory errors................................................................................ 2-86
4.10.5 Security Function Lock related problems.................................................... 2-86
4.10.6 Ink cartridge related problems..................................................................... 2-86
4.10.7 Loud printing sound.....................................................................................2-86
CHAPTER 3 DISASSEMBLY AND ASSEMBLY ............................................................... 3-1
1 PRECAUTIONS BEFORE PROCEEDING .................................................................... 3-1
2 PACKING ....................................................................................................................... 3-3
3 SCREW CATALOGUE................................................................................................... 3-4
4 SCREW TORQUE LIST ................................................................................................. 3-5
5 LUBRICATION ............................................................................................................... 3-6
6 OVERVIEW OF GEARS............................................................................................... 3-11
7 ROUTING OF HARNESSES AND INK SUPPLY TUBES ........................................... 3-12
8 DISASSEMBLY FLOW ................................................................................................ 3-20
9 DISASSEMBLY PROCEDURE.................................................................................... 3-22
9.1 Preparation.......................................................................................................... 3-22
9.2 Head Joint Rubber, Head/carriage Unit and CR Timing Belt .............................. 3-27
9.3 Ink Absorber Box................................................................................................. 3-41
9.4 FB Hinge.............................................................................................................. 3-42
9.5 Manual Feed Slot Cover ASSY ...........................................................................3-45
9.6 Document Scanner Side Cover L........................................................................ 3-46
9.7 Document Scanner Side Cover R ....................................................................... 3-47

Brother MFC-J6720DW Specifications

General

Duplex printing	Yes
Print technology	Inkjet
Maximum resolution	6000 x 1200 DPI
Duplex printing mode	Auto
Print speed (ISO/IEC 24734) mono	22 ipm
Print speed (ISO/IEC 24734) color	20 ipm
Print speed (black, normal quality, A4/US Letter)	35 ppm
Print speed (color, normal quality, A4/US Letter)	27 ppm
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 2400 DPI
Maximum number of copies	99 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 to	CIFS, E-mail, E-mail Server, Fax, File, FTP, Image, Memory Card, OCR, USB
Scan drivers	ICA, TWAIN, WIA
Scanner type	Flatbed & ADF scanner
Grayscale levels	256
Input color depth	48 bit
Maximum scan area	297 x 432 mm
Output color depth	24 bit
Image formats supported	BMP, JPG, PCX, PNG, TIF
Maximum scan resolution	19200 x 19200 DPI
Document formats supported	HTM, PDF
Optical scanning resolution	2400 x 2400 DPI
Faxing	Color faxing
Fax memory	200 pages
Modem speed	33.6 Kbit/s
Fax resolution (black)	203 x 196 DPI
Fax transmission speed	3 sec/page
Digital sender	No
Printing colors	Black, Cyan, Magenta, Yellow
Maximum duty cycle	26000 pages per month
Recommended duty cycle	250 - 1500 pages per month
Number of print cartridges	4
Page description languages	GDI
Paper input type	Paper tray
Total input capacity	500 sheets
Total output capacity	50 sheets
Total number of input trays	2
Multi-Purpose tray input capacity	1 sheets
Auto document feeder (ADF) input capacity	35 sheets
Envelopes sizes	10, C5, DL, Monarch
Photo paper sizes	10x15 cm
Custom media width	89 - 297 mm
Maximum print size	210 x 297 mm
Custom media length	127 - 431.8 mm
Paper tray media types	Coated paper, Glossy paper, Plain paper, Transparencies
Non-ISO print media sizes	2L, 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 sizes	Ledger, 4x6, 10x15, 2L, A3, A4, A6, Index card, L, Letter
Maximum ISO A-series paper size	A4
Display	LCD
Control type	Touch
Product color	Black, White
Display diagonal	2.7 \
Market positioning	Business
Standard interfaces	Ethernet, USB 1.1, USB 2.0, Wireless LAN
USB 2.0 ports quantity	1
Fax compatibility	ITU-T G3
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Security algorithms	128-bit WEP, 64-bit WEP, SSID, TKIP, WPA-AES, WPA-PSK, WPA-TKIP, WPA2-AES, WPA2-PSK
Mobile printing technologies	Apple AirPrint, Brother iPrint & Scan, Google Cloud Print
Compatible memory cards	microSD (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 frequency	50 - 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 depth	497.84 mm
Package width	657.86 mm
Package height	414 mm
Package weight	19912 g
Storage temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	20 - 80 %
Mac operating systems supported	Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion
Windows operating systems supported	Windows 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 certificates	Blue Angel, ENERGY STAR

Weight and Dimensions

Depth	433 mm
Width	553 mm
Height	310 mm