Brother MFC-J3940DW User Manual

Home > Troubleshooting > If You Are Having Difficulty with Your Machine > Other Problems
Other Problems
>> Copying Difficulties
>> Scanning Difficulties
>> Direct Photo Printing Difficulties
>> Software Difficulties
Copying Difficulties
Difficulties
Suggestions
Cannot make a copy. Contact your administrator to check your Secure Function Lock Settings.
Black lines or streaks appear in
copies.
A
A
Black lines on copies are typically caused by dirt or correction fluid on the glass
strip. Clean the glass strip, scanner glass, and the white bar and white plastic
above them.
See Related Information: Clean the Scanner.
Black marks or spots appear in
copies.
Black marks or spots on copies are typically caused by dirt or correction fluid on
the scanner glass. Clean the scanner glass and white plastic above it.
See Related Information: Clean the Scanner.
Copies are blank. Make sure you are loading the document correctly.
See Related Information: Load Documents in the Automatic Document Feeder
(ADF).
See Related Information: Load Documents on the Scanner Glass.
Poor copy results when using the
ADF.
Try using the scanner glass.
See Related Information: Load Documents on the Scanner Glass.
Fit to Page does not work
correctly.
Make sure the document is not skewed on the scanner glass. Reposition the
document and try again.
The machine may not detect the document size correctly for some documents,
such as dark-colour documents and transparencies. Therefore, Fit to Page may
not work.
Select an enlargement or reduction ratio other than Fit to Page according to the
sizes of your document and paper.
Smudge or stain on the reverse
side of the page when using the 2-
sided copy feature.
Change the print options.
See Related Information: Change the Print Options to Improve Your Print
Results.
Scanning Difficulties
Difficulties
Suggestions
TWAIN or WIA errors appear
when starting to scan. (Windows)
Make sure the Brother TWAIN or WIA driver is selected as the primary source in
your scanning application. For example, in Nuance
™
PaperPort
™
14SE, click
Desktop > Scan Settings > Select to choose the Brother TWAIN/WIA driver.
OCR does not work. Try increasing the scanning resolution.
Poor scanning results when using
the ADF. (Black lines appear in
the scanned data.)
Clean the white bar and the glass strip underneath it.
See Related Information: Clean the Scanner.
Try using the scanner glass.
See Related Information: Load Documents on the Scanner Glass.
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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