Brother MFC-J491DW User Manual

Home > Troubleshooting
Troubleshooting
If you think there is a problem with your machine, first check each of the items below, then try to identify the
problem, and follow our troubleshooting tips.
You can correct most problems yourself. If you need additional help, the Brother Solutions Center offers the
latest FAQs & Troubleshooting tips.
Visit us at support.brother.com.
Click FAQs & Troubleshooting and search for your model name.
First, check the following:
• The machine's power cord is connected correctly and the machine's power is on.
• All of the machine's orange protective parts have been removed.
• The ink cartridges are installed correctly.
• The Scanner Cover and the Jam Clear Cover are fully closed.
• Paper is inserted correctly in the paper tray.
• The interface cables are securely connected to the machine and the computer, or the wireless connection is
set up on both the machine and your computer.
• (For network models) The access point (for wireless), router, or hub is turned on and its link button is blinking.
• The machine's LCD is displaying messages.
If you did not solve the problem with the checks, identify the problem and then see Related Information.
Related Information
• Error and Maintenance Messages
• Document Jams
• Printer Jam or Paper Jam
• If You Are Having Difficulty with Your Machine
• Check the Machine Information
• Reset Your Brother Machine
• Paper Handling and Printing Problems
• Telephone and Fax Problems
• Other Problems
• Network Problems
• Google Cloud Print Problems
• AirPrint Problems
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Brother MFC-J491DW Specifications

General

Display	LCD
Product color	Black
Built-in display	Yes
Display diagonal	1.77 \
Market positioning	Home & office
Internal memory	128 MB
Card reader integrated	No
Sound pressure level (copying)	50 dB
Print technology	Inkjet
Maximum resolution	1200 x 6000 DPI
Duplex printing mode	Auto
Print speed (ISO/IEC 24734) mono	12 ipm
Print speed (ISO/IEC 24734) color	6 ipm
Time to first page (black, normal)	8 s
Duplex print speed (ISO/IEC 24734) mono	3 ipm
Duplex print speed (ISO/IEC 24734) color	1.7 ipm
Print speed (black, normal quality, A4/US Letter)	27 ppm
Print speed (color, normal quality, A4/US Letter)	10 ppm
Standard interfaces	USB 2.0, Wireless LAN
USB 2.0 ports quantity	1
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
Package depth	249 mm
Package width	447 mm
Package height	457 mm
Package weight	10100 g
Power consumption (off)	0.2 W
Power consumption (sleep)	1 W
Power consumption (standby)	3.5 W
Power consumption (printing)	16 W
Power consumption (average operating)	- W
Sustainability certificates	Nordic Swan Ecolabel, ENERGY STAR
Faxing	Mono faxing
Fax memory	170 pages
Modem speed	14.4 Kbit/s
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Security algorithms	64-bit WEP, 128-bit WEP, WPA-PSK, WPA2-PSK
Mobile printing technologies	Apple AirPrint, Mopria Print Service
Paper input type	Paper tray
Total input capacity	100 sheets
Total output capacity	50 sheets
Auto document feeder (ADF) input capacity	20 sheets
Paper tray media types	Plain paper
Borderless printing media sizes	A4
Scan to	E-mail, File, Image, OCR
Scanner type	Flatbed & ADF scanner
Input color depth	30 bit
Output color depth	24 bit
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	1200 x 2400 DPI
Digital sender	-
Maximum duty cycle	- pages per month
Harmonized System (HS) code	84433100

Weight and Dimensions

Depth	341 mm
Width	400 mm
Height	172 mm