Brother MFC-9840CDW Reference Manual

Confidential
Ref. 2-25
3.5 Print
3.5.1 Principle of Color Overlapping
The human eye distinguishes one color from others by receiving light’s three primary colors
(Red, Green, Blue). When monochrome lights are received, each color can be sensed.
However, when two-color lights, red (R) and green (G), are received, they are recognized as
“yellow”; when three-color lights, red (R), green (G) and blue (B), are received, they are
recognized as “white.” The fineness of coloration is perceived according to the nature of light.
Red
Green
Blue
White
Yellow
Cyan
Mazenta
Fig. Ref2-22
For printed colors, the human eye can perceive them as various colors by distinguishing each
color light reflected off the surface of a sheet of paper.
(1) For “cyan,” since the print absorbs red (R) light of the three colors, only green (G) light and
blue (B) light are reflected, the color on the print side is recognized as a cyan color. (See
the following figure (1).)
(2) “Magenta” absorbs green (G) light and reflects red (R) light and blue (B) light. (See the
following figure (2).)
(3) If cyan and magenta are mixed, cyan absorbs red (R) light and magenta absorbs green (G)
light, and only blue (B) light is reflected. The light is identified as “blue.” (See the following
figure (3).)
Theoretically, if cyan, magenta and yellow are mixed, all the colors are not reflected and black
can be shown. However, a black mix is difficult to produce, and black is shown using black-
color paint for practical purposes. Using such a principle, color-absorbing paints are mixed to
allow many colors to be shown on the surface of a sheet of paper.
AbsorbedReflected Reflected
Cyan toner
AbsorbedReflected
Cyan toner + Magenta toner
Absorbed
Absorbed ReflectedReflected
Magenta toner
(1) Green+Blue
(3) Blue
(2) Red+Blue
B G R
B G R
B G R
Fig. Ref2-23

Brother MFC-9840CDW Specifications

General

Print technology	Laser
Maximum resolution	600 x 2400 DPI
Economical printing	Yes
Time to first page (black, normal)	16 s
Time to first page (color, normal)	17 s
Print speed (black, normal quality, A4/US Letter)	20 ppm
Scan to	E-mail, FTP, OCR, USB
Scanner type	Flatbed scanner
Grayscale levels	256
Input color depth	48 bit
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	1200 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
N-in-1 copy function (N=)	4, 9, 16, 25
Copy speed (black, normal quality, A4)	16 cpm
Faxing	Mono faxing
Fax memory	400 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	300
Total input capacity	250 sheets
Total output capacity	150 sheets
Multi-Purpose tray input capacity	50 sheets
Auto document feeder (ADF) input capacity	35 sheets
Internal memory	128 MB
Sound power level (standby)	30 dB
Sound pressure level (printing)	54.5 dB
Custom media sizes	(69.9 - 216mm) - (116 - 406.4mm)
Dimensions (WxDxH)	530 x 539 x 520 mm
Networking features	10/100Base-TX
Wireless technology	IEEE 802.11b/g
All-in-one functions	Copy, Fax, Scan
Maximum internal memory	0.640 GB
Color all-in-one functions	copy, print, scan
Media weight (tray 1)	60 - 105g/m2
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Legal (media size), Letter (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
JIS B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Security algorithms	LEAP
Supported network protocols (IPv4)	TCP/IP (IPv4 & IPv6)
Standard interfaces	USB 2.0
USB 2.0 ports quantity	1
Bundled software	ScanSoft PaperPort (Win) NewSoft Presto! PageManager (Mac)
Power consumption (PowerSave)	36 W
Power consumption (average operating)	515, 100 W
Package weight	45800 g
Digital sender	No
Maximum duty cycle	3000 pages per month
Market positioning	Business