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Brother MFC-J491DW User Manual

Brother MFC-J491DW
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Gray (Error Diffusion)
Use for photographic images or graphics. (Error Diffusion is a method for creating simulated gray
images without using true gray dots. Black dots are put in a specific pattern to give a gray
appearance.)
True Gray
Use for photographic images or graphics. This mode is more accurate because it uses up to 256
shades of gray.
24bit Color
Use to create an image with the most accurate color reproduction. This mode uses up to 16.8 million
colors to scan the image, but it requires the most memory and has the longest transfer time.
4. Document Size
Select the exact size of your document from a selection of preset scan sizes.
If you select Custom, the Custom Document Size dialog box appears and you can specify the document
size.
5. Brightness
Set the Brightness level by dragging the slider to the right or left to lighten or darken the image. If the
scanned image is too light, set a lower brightness level and scan the document again. If the image is too
dark, set a higher brightness level and scan the document again. You can also type a value in the field to set
the brightness level.
6. Contrast
Increase or decrease the Contrast level by moving the slider to the right or left. An increase emphasizes dark
and light areas of the image, while a decrease reveals more details in gray areas. You can also type a value
in the field to set the contrast level.
7. Auto Crop
Scan multiple documents placed on the scanner glass. The machine will scan each document and create
separate files or a single multi-page file.
8. Advanced Settings
Configure advanced settings by clicking the Advanced Settings button in the Scanner Setup dialog box.
Paper Detection
- Rotate Image
Rotate the scanned image.
Image Quality
- Background Processing
Remove Bleed-through / Pattern
Prevent bleed-through.
161

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Brother MFC-J491DW Specifications

General IconGeneral
DisplayLCD
Product colorBlack
Built-in displayYes
Display diagonal1.77 \
Market positioningHome & office
Internal memory128 MB
Card reader integratedNo
Sound pressure level (copying)50 dB
Print technologyInkjet
Maximum resolution1200 x 6000 DPI
Duplex printing modeAuto
Print speed (ISO/IEC 24734) mono12 ipm
Print speed (ISO/IEC 24734) color6 ipm
Time to first page (black, normal)8 s
Duplex print speed (ISO/IEC 24734) mono3 ipm
Duplex print speed (ISO/IEC 24734) color1.7 ipm
Print speed (black, normal quality, A4/US Letter)27 ppm
Print speed (color, normal quality, A4/US Letter)10 ppm
Standard interfacesUSB 2.0, Wireless LAN
USB 2.0 ports quantity1
Copier resize25 - 400 %
Maximum copy resolution1200 x 600 DPI
Package depth249 mm
Package width447 mm
Package height457 mm
Package weight10100 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 certificatesNordic Swan Ecolabel, ENERGY STAR
FaxingMono faxing
Fax memory170 pages
Modem speed14.4 Kbit/s
Wi-Fi standards802.11b, 802.11g, Wi-Fi 4 (802.11n)
Security algorithms64-bit WEP, 128-bit WEP, WPA-PSK, WPA2-PSK
Mobile printing technologiesApple AirPrint, Mopria Print Service
Paper input typePaper tray
Total input capacity100 sheets
Total output capacity50 sheets
Auto document feeder (ADF) input capacity20 sheets
Paper tray media typesPlain paper
Borderless printing media sizesA4
Scan toE-mail, File, Image, OCR
Scanner typeFlatbed & ADF scanner
Input color depth30 bit
Output color depth24 bit
Maximum scan resolution19200 x 19200 DPI
Optical scanning resolution1200 x 2400 DPI
Digital sender-
Maximum duty cycle- pages per month
Harmonized System (HS) code84433100
Weight and Dimensions IconWeight and Dimensions
Depth341 mm
Width400 mm
Height172 mm

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