Brother MFC-J3940DW User Manual

Difficulties Suggestions
If the paper tray is empty, load a new stack of paper into the paper tray.
If there is paper in the paper tray, make sure it is straight. If the paper is curled,
straighten it. Sometimes it is helpful to remove the paper, turn the stack over and
put it back in the paper tray.
Reduce the amount of paper in the paper tray, and then try again.
Clean the paper pick-up rollers.
See Related Information: Clean the Paper Pick-up Rollers for Paper Tray #1 or
Clean the Paper Pick-up Rollers for Paper Tray #2.
Make sure that the paper is within specifications for the machine.
See Related Information: Paper Orientation and Capacity of the Paper Trays.
Photo paper does not feed
correctly.
When you print on photo paper, load one extra sheet of the same photo paper in
the paper tray.
Machine feeds multiple pages. • Make sure the paper is loaded correctly in the paper tray.
• Remove all the paper from the tray and fan the stack of paper well, then put it
back in the tray.
• Make sure you do not push the paper in too far.
See Related Information: Load Paper.
Make sure the Jam Clear Cover is closed correctly.
See Related Information: Printer Jam or Paper Jam.
Make sure the Base Pad in the paper tray is not dirty.
See Related Information: Clean the Base Pad.
There is a paper jam. See Related Information: Printer Jam or Paper Jam.
Make sure the paper guides are set to the correct paper size.
Use the jam prevention settings.
For copying:
See Related Information: Change the Print Options to Improve Your Print
Results.
For printing:
See Related Information: Prevent Smudged Printouts and Paper Jams
(Windows).
Paper jam reoccurs.
If there is a repeat paper jam, a small piece of paper may be stuck in the
machine. Make sure paper is not still jammed in the machine.
See Related Information: Remove Paper Scraps.
The paper jams when you use 2-
sided print.
If paper jams occur frequently during 2-sided printing, the paper feed rollers may
be stained with ink. Clean the paper feed rollers.
See Related Information: Clean the Paper Feed Rollers.
Printing Received Faxes
Difficulties
Suggestions
• Condensed print
• Horizontal streaks
• Top and bottom sentences are
cut off
• Missing lines
This is usually caused by a poor telephone connection. Make a copy; if your copy
looks good, you probably had a bad connection, with static or interference on the
telephone line. Ask the other party to send the fax again.
Black lines when receiving. The sender’s scanner may be dirty. Ask the sender to make a copy to see if the
problem is with the sending machine. Try receiving from another fax machine.
Left and right margins are cut off
or a single page is printed on two
pages.
If the received faxes are divided and printed on two pages or if you get an extra
blank page, your paper size setting may not be correct for the paper you are
using.
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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