Brother MFC-J3940DW User Manual

Error Message Cause Action
See Related Information: Load
Documents in the Automatic Document
Feeder (ADF).
See Related Information: Document
Jams.
High Temperature
The room temperature is too high. After cooling the room, allow the machine
to cool down to room temperature. Try
again when the machine has cooled
down.
Hub is Unusable.
A hub or USB flash drive with hub has
been connected to the USB direct
interface.
Hubs, including a USB flash drive with a
built-in hub, are not supported. Unplug the
device from the USB direct interface.
Ink Absorber NearFull
The ink absorber box is nearly full. The ink absorber box must be replaced
soon. Contact Brother customer service or
your local Brother dealer.
Ink Absorber Pad Full
The ink absorber box is full. These
components are periodic maintenance
items that may require replacement after
a period of time to ensure optimum
performance from your Brother machine.
Because these components are periodic
maintenance items, the replacement is
not covered under the warranty. The need
to replace these items and the time period
before replacement is dependent on the
number of purges and flushes required to
clean the ink system. These boxes
acquire amounts of ink during the different
purging and flushing operations. The
number of times a machine purges and
flushes for cleaning varies depending on
different situations. For example,
frequently powering the machine on and
off will cause numerous cleaning cycles
since the machine automatically cleans
upon power up. The use of non-Brother
ink may cause frequent cleanings
because non-Brother ink could cause
poor print quality which is resolved by
cleaning. The more cleaning the machine
requires, the faster these boxes will fill up.
Repairs resulting from the use of non-
Brother supplies may not be covered
under the stated product warranty.
The ink absorber box must be replaced.
Contact Brother customer service or your
local Brother Authorised Service Centre to
have your machine serviced.
The machine cleans itself after:
• You remove the power cord and plug it
back in.
• A paper jam has been cleared.
• Sitting idle for more than 30 days
(infrequent use).
• Ink cartridges of the same colour have
been replaced 12 times.
Ink Low
The ink level is low. If the sending
machine has the ability to convert it, the
colour fax will be printed at your machine
as a monochrome fax.
Prepare a new ink cartridge. You can
continue printing until the touchscreen
displays Replace Ink.
See Related Information: Replace the Ink
Cartridges.
• You can still scan even if the ink is
low or needs to be replaced.
Install Ink
An ink cartridge is not installed correctly. Remove the ink cartridge and re-install it
slowly and firmly until it locks into place.
See Related Information: Replace the Ink
Cartridges.
Jam Front/Rear
Jam Front
Jam Rear
The paper is jammed in the machine. Gently remove the jammed paper.
See Related Information: Printer Jam or
Paper Jam.
412

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