Brother MFC-J3940DW User Manual

Difficulties Suggestions
Printed text or images are
skewed.
Make sure the paper is loaded correctly in the paper tray and the paper guides
are adjusted correctly.
See Related Information: Load Paper.
Make sure the Jam Clear Cover is closed correctly.
There are smudges or stains at
the top centre of the printed page.
Make sure the paper is not too thick or curled.
See Related Information: Acceptable Print Media.
Printing appears dirty or ink
seems to run.
Make sure you are using the recommended types of paper. Do not handle the
paper until the ink is dry.
See Related Information: Acceptable Print Media.
Make sure the printing surface is face down in the paper tray.
Make sure you are using Brother Original ink.
If you are using photo paper, make sure the glossy side of the photo paper is
face down in the tray and you have set the correct paper type. If you are printing
a photo from your computer, set the Media Type in the printer driver or in the
application you use to print.
Ink is smudged or wet when using
glossy photo paper.
Be sure to check the front and back of the paper. Place the glossy surface
(printing surface) face down.
See Related Information: Change the Paper Size and Paper Type.
If you use glossy photo paper, make sure the paper type setting is correct.
Stains appear on the reverse side
or at the bottom of the page.
Make sure the printer platen is not dirty with ink.
See Related Information: Clean the Machine's Printer Platen.
Make sure you are using Brother Original ink.
Make sure you are using the paper support flap.
See Related Information: Load Paper.
Make sure the paper feed rollers are not dirty with ink.
See Related Information: Clean the Paper Feed Rollers.
The printouts are wrinkled. (Windows)
In the printer driver, select the Advanced tab, click Other Print Options, and
then click Advanced Colour Settings. Clear the Bi-Directional Printing check
box.
Make sure you are using Brother Original ink.
Smudge or stain on the reverse
side of the page when using the
automatic 2-sided printing feature.
(Windows)
Change the Reduce Smudge option in your printer driver properties or
preferences.
See Related Information: Prevent Smudged Printouts and Paper Jams
(Windows).
Paper Handling Difficulties
Difficulties
Suggestions
The machine does not feed paper. Make sure the paper tray is pushed in all the way until it locks into place.
Make sure the Jam Clear Cover at the back of the machine is closed.
If the machine's LCD displays a Paper Jam message and you still have a
problem, see Related Information: Error and Maintenance Messages.
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Brother MFC-J3940DW Specifications

General

Card reader integrated	No
Sound power level (printing)	65.4 dB
Sound pressure level (printing)	50 dB
Scan to	E-mail, E-mail Server, FTP, File, Image, OCR, USB
Scan drivers	SANE, TWAIN, WIA
Scanner type	ADF scanner
Duplex scanning	Yes
Grayscale levels	256
Input color depth	48 bit
Output color depth	24 bit
Input grayscale depth	16 bit
Output grayscale depth	8 bit
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	1200 x 2400 DPI
N-up printing	2, 4, 9, 16
Print technology	Inkjet
Maximum resolution	4800 x 1200 DPI
Duplex printing mode	Auto/Manual
Print speed (ISO/IEC 24734) mono	28 ipm
Print speed (ISO/IEC 24734) color	21 ipm
Time to first page (black, normal)	4.4 s
Time to first page (color, normal)	4.6 s
Print speed (black, normal quality, A4/US Letter)	- ppm
Display	LCD
Control type	Buttons, Touch
Product color	Gray
Display diagonal	3.5 \
Market positioning	Home & office
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Cabling technology	10/100Base-T(X)
Security algorithms	802.1x RADIUS, APOP, SMTP-AUTH, SNMPv3, SSL/TLS
Ethernet LAN data rates	10, 100 Mbit/s
Mobile printing technologies	Apple AirPrint, Brother iPrint & Scan, Google Cloud Print, Mopria Print Service
Printing colors	Black, Cyan, Magenta, Yellow
Duplex functions	Copy, Fax, Print, Scan
Maximum duty cycle	- pages per month
Number of print cartridges	4
Copier resize	25 - 400 %
Maximum copy resolution	600 x 600 DPI
Maximum number of copies	999 copies
N-in-1 copy function (N=)	2, 4
Time to first copy (black, normal)	5 s
Time to first copy (color, normal)	6 s
Package depth	561 mm
Package width	681 mm
Package height	493 mm
Package weight	26600 g
Quantity per pack	1 pc(s)
Paper input type	Paper tray
Total input capacity	650 sheets
Paper tray 1 input capacity	250 sheets
Multi-Purpose tray input capacity	100 sheets
Auto document feeder (ADF) input capacity	50 sheets
Cables included	Phone
Faxing	Color faxing
Fax memory	150 pages
Modem speed	33.6 Kbit/s
Fax forwarding to	E-mail, Fax, PC
Fax speed dialing (max numbers)	150
AC input voltage	220 - 240 V
Power consumption (off)	0.03 W
Power consumption (sleep)	0.9 W
Power consumption (copying)	29 W
Power consumption (standby)	6 W
Envelopes sizes	Com-10, DL, Monarch
Photo paper sizes	9x13, 10x15, 13x18 cm
Custom media width	105 - 297 mm
Custom media length	148 - 431.8 mm
Paper tray media types	Coated paper, Envelopes, Glossy paper, Photo paper, Plain paper, Recycled paper
ISO A-series sizes (A0...A9)	A3, A4, A5, A6
Maximum ISO A-series paper size	A3
Multi-Purpose Tray media weight	64 - 220 g/m²
Auto Document Feeder (ADF) media weight	64 - 120 g/m²
Mac operating systems supported	Mac OS X 10.14 Mojave, Mac OS X 10.15 Catalina, Mac OS X 10.15.3 Catalina, Mac OS X 10.9 Mavericks, Mac OS X 11.0 Big Sur
Other operating systems supported	ChromeOS
Server operating systems supported	Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Windows operating systems supported	Windows 10, Windows 7, Windows 8, Windows 8.1

Weight and Dimensions

Depth	477 mm
Width	576 mm
Height	375 mm