Lexmark C746 User Manual

Uneven print density
MAKE SURE THERE IS NO DEFECTIVE OR WORN PRINT OR TONER CARTRIDGE
Replace the worn or defective cartridge.
Solving color quality problems
FAQ about color printing
What is RGB color?
Red, green, and blue light can be added together in various amounts to produce a large range of colors observed in
nature. For example, red and green can be combined to create yellow. Televisions and computer monitors create
colors in this manner. RGB color is a method of describing colors by indicating the amount of red, green, or blue
needed to produce a certain color.
What is CMYK color?
Cyan, magenta, yellow, and black inks or toners can be printed in various amounts to produce a large range of colors
observed in nature. For example, cyan and yellow can be combined to create green. Printing presses, inkjet printers,
and color laser printers create colors in this manner. CMYK color is a method of describing colors by indicating the
amount of cyan, magenta, yellow, and black needed to reproduce a particular color.
How is color specified in a document to be printed?
Software programs typically specify document color using RGB or CMYK color combinations. Additionally, they allow
users to modify the color of each object in a document. For more information, see the software program Help topics.
How does the printer know what color to print?
When a user prints a document, information describing the type and color of each object is sent to the printer. The
color information is passed through color conversion tables that translate the color into the appropriate amounts of
cyan, magenta, yellow, and black toner needed to produce the desired color. The object information determines the
application of color conversion tables. For example, it is possible to apply one type of color conversion table to text
while applying a different color conversion table to photographic images.
Why doesn't the printed color match the color I see on the computer screen?
The color conversion tables used in Auto Color Correction mode generally approximate the colors of a standard
computer monitor. However, because of technology differences that exist between printers and monitors, there are
many colors that can also be affected by monitor variations and lighting conditions. For recommendations on how
the printer color sample pages may be useful in solving certain color‑matching problems, see the question, “How
can I match a particular color (such as a corporate logo)?”
Troubleshooting 251

Lexmark C746 Specifications

General

Color	Yes
Print technology	Laser
Resolution color	2400 x 600 DPI
Maximum resolution	1200 x 1200 DPI
Duplex printing mode	Auto/Manual
Time to first page (black, normal)	9 s
Print margins (top, bottom, right, left)	4.2 mm
Print speed (black, normal quality, A4/US Letter)	33 ppm
Printing colors	Black, Cyan, Magenta, Yellow
Maximum duty cycle	85000 pages per month
Recommended duty cycle	1500 - 9200 pages per month
Number of print cartridges	1
Page description languages	Microsoft XPS, PCL 5c, PCL 6, PDF 1.6, PostScript 3, PPDS
Paper input type	Paper tray
Total input capacity	650 sheets
Total output capacity	300 sheets
Maximum input capacity	4300 sheets
Total number of input trays	2
Maximum number of input trays	6
Multi-Purpose tray input capacity	100 sheets
Envelopes sizes	7 3/4, 9, 10, B5, C5, DL
Paper tray media types	Card stock, Envelopes, Labels, Plain paper, Transparencies
Paper tray media weight	60 - 218 g/m²
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Letter (media size), Oficio (media size), Statement (140 x 216mm), Universal, Legal (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
JIS B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Wi-Fi	No
Security algorithms	802.1x RADIUS, HTTPS, LEAP, MD5, PEAP, SSL/TLS
Mobile printing technologies	-
Supported network protocols (IPv4)	TCP/IP, AppleTalk
Supported network protocols (IPv6)	TCP/IP, TCP, UDP
Standard interfaces	Ethernet, USB 2.0
Optional connectivity	Parallel, Serial (RS-232), Wireless LAN
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Noise level (idle)	32 dB
Maximum internal memory	1536 MB
Sound pressure level (printing)	54 dB
Sound pressure level (quiet mode)	48 dB
Display	LCD
Certification	CAN/CSA-C22.2 60950-1, CSA E60825-1, ICES-003 Class A, BSMI Class A, VCCI Class A, US FDA, FCC Class A, UL 60950-1, EN/IEC 60320-1, CE Class A, CB IEC 60950-1, EN 60950-1, EN/IEC 61000-3, EN 55022 Class A, EN 55024, EN/IEC 60825-1, GS (TÜV), AR S (TÜV), SMA C-tick mark Class A, CCC Class A, CISPIR 22 Class A, MIC Mark, EK Mark
Product color	Black, White
Display diagonal	2.4 \
Power consumption (off)	6.8 W
Power consumption (standby)	48 W
Power consumption (printing)	420 W
Server operating systems supported	Windows Server 2003, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Operating altitude	0 - 3048 m
Operating temperature (T-T)	16 - 32 °C
Operating relative humidity (H-H)	8 - 80 %
Package depth	553 mm
Package width	588 mm
Package height	545 mm
Package weight	29700 g

Weight and Dimensions

Depth	400 mm
Width	435 mm
Height	455 mm