Brother MFC-J3940DW User Manual

Error Message Cause Action
Jam MP Tray
Jam Manual Feed Slot
Jam Front/MP Tray
Jam Front/Manual Feed
Slot
Jam Tray2
Repeat Jam XX
If there is a repeat paper jam, try another
paper jam clear operation.
See Related Information: Remove Paper
Scraps.
The paper guides are not set to the
correct paper size.
Make sure the paper guides are set to the
correct paper size.
The machine's paper support is not set
correctly.
Make sure the paper support is fully
inserted into the machine.
See Related Information: Paper is
Jammed in the Front of the Machine.
More than one sheet of paper was placed
in the manual feed slot.
-OR-
Another sheet of paper was placed in the
manual feed slot before the touchscreen
prompted you to load another sheet of
paper.
Do not put more than one sheet of paper
in the manual feed slot at any one time.
Wait until the touchscreen prompts you to
load another sheet of paper before you
feed the next sheet of paper in the manual
feed slot.
Gently remove the jammed paper.
See Related Information: Printer Jam or
Paper Jam.
Paper dust has accumulated on the
surface of the paper pick-up rollers.
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.
Low Temperature
The room temperature is too low. After warming the room, allow the
machine to warm up to room temperature.
Try again when the machine has warmed
up.
Media is Full.
The USB flash drive you are using does
not have enough free space to scan the
document.
Delete unused files from your USB flash
drive to free some space, and then try
again.
No Caller ID
There is no incoming call history. You did
not receive calls or you have not
subscribed to the Caller ID service from
your telephone company.
To use the Caller ID feature, contact your
telephone company.
See Related Information: Caller ID.
No Device
When configuring the Wi-Fi Direct
network, the Brother machine cannot find
your mobile device.
• Make sure your machine and mobile
device are in the Wi-Fi Direct mode.
• Move the mobile device closer to your
Brother machine.
• Move your Brother machine and the
mobile device to an obstruction-free
area.
• If you are manually configuring the Wi-
Fi Direct network, make sure you have
entered the correct password.
• If your mobile device has a
configuration page for how to obtain
an IP address, make sure the IP
address of your mobile device has
been configured via DHCP.
No File
The USB flash drive in the media drive
does not contain a .JPG file.
Reinsert the correct USB flash drive in the
slot.
No Paper Fed
The machine is out of paper or paper is
not correctly loaded in the paper tray.
Do one of the following:
• Refill the paper tray, and then follow
the LCD instructions.
413

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