Lexmark C770 Solving color quality problems, Frequently asked questions FAQ about color printing

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Troubleshooting

Solving color quality problems

This section helps answer some basic color-related questions and describes how some of the features provided in the Quality Menu can be used to solve typical color problems.

Note: See the quick reference page entitled “Print quality and troubleshooting guide” which provides solutions for common print quality problems, some of which may affect the color quality of the printed output.

Frequently asked questions (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 light can be combined to create yellow light. Televisions and computer monitors create colors in this manner. RGB color is a method of describing colors by indicating the amount of red, green, and blue light needed to reproduce a particular 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 applications typically specify document color using RGB or CMYK color combinations. Additionally, they commonly let users modify the color of each object in a document. Since the procedures to modify colors vary depending on the application, see the software application Help section for instruction.

How does the printer know what color to print?

When a user prints a document, information describing the type and color of each object in the document is sent to the printer. The color information is passed through color conversion tables that translate the color into appropriate amounts of cyan, magenta, yellow, and black toner needed to produce the desired color. The object type information lets different color conversion tables be used for different types of objects. 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.

Should I use the PostScript or PCL emulation driver for the best color? What driver settings should I use for the best color?

The PostScript driver is strongly recommended for best color quality. The default settings in the PostScript driver provide preferred color quality for the majority of printouts.

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 be generated on a computer screen that cannot be physically reproduced on a color laser printer. Color match can also be affected by monitor variations and lighting conditions. See the response to the question How can I match a particular color (such as a color in a corporate logo)? on page 99 for recommendations on how the printer Color Samples pages may be useful in solving certain color-matching problems.

Solving color quality problems

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Contents C770, C772 Trademarks Safety informationEdition March Contents Contents Internal options Input optionsOutput options Continue with Installing a 500-sheet drawer Installing a 2000-sheet drawerInstalling and removing options Installing a 500-sheet drawer Installing a duplex unit Installing the printer Installing an output expanderInstalling an output expander Installing a 5-bin mailbox Installing a StapleSmart finisher Installing a memory card Installing memory and option cardsRemoving the system board access cover Installing a firmware card Installing a hard disk Installing an option card Card FunctionConnector Accessing the printer system board Removing memory and option cardsRemoving memory cards Removing an option cardInstalling and removing options Removing a hard disk Removing a firmware card Reinstalling the system board access cover Printing Understanding the printer operator panelStatus Indicates Operator panel buttonsPrinting Sending a job to print Button FunctionPrinting from a USB flash memory device Canceling a job from a computer running Windows Canceling a print jobCanceling a job from the printer operator panel Canceling a job from a Macintosh computer Printing a menu settingsPrinting a network setup Canceling a job from a Macintosh computer running Mac OSLoading the trays Printing a font sample listPrinting a directory list Loading 500-sheet trays Printing Loading the 2000-sheet tray Printing Loading the multipurpose feeder Printing Mac OS Printing on specialty media transparencies, labels, otherWindows Loading the trays Loading the multipurpose feederLinking trays Select File PrintPrinting and deleting held jobs Linking output binsHolding a job in the printer Value DescriptionMacintosh Printing confidential jobsWindows Print Time FiltersEnter PIN At the printerEntering a personal identification number PIN Repeat Print Verify PrintReserve Print Copies & Pages or General pop-up menu, choose Job RoutingPrint All Delete All JobName1 JobName2 Storing supplies Tips for successful printingStoring paper Avoiding jams Paper Paper characteristicsMedia guidelines Media specifications Selecting paper Media specifications Unacceptable paperStoring paper Printing on letterhead TransparenciesSelecting preprinted forms and letterhead Media source or process Print side TopMedia specifications Selecting transparencies EnvelopesLabels Card stock Identifying media sources and specificationsStoring media Dimensions Media sizes and supportMedia support by type for optional features Media types and weights input options Maximum2,4 Media types and weights output optionsMaximum Vinyl labels Media capacitiesPaper labels Banner paperStatus / Supplies Determining the status of suppliesReady. Tray 1 Low, Tray View supplies Y KOrdering supplies Print cartridges Supply Menu selection item What the setting doesConserving supplies Maintaining the printerOrdering a fuser Toner waste containerFuser and ITU Type of fuser Printer voltage Part numberOrdering staple cartridges Recycling Lexmark productsOrdering an image transfer unit and transfer roller Clearing paper jams Identifying jamsAccess doors and trays Clearing paper jamsMessage Check Areas What to do Understanding jam messagesPaper jam messages Expander jams Area MArea B Clearing the entire paper pathArea a Area C Area DArea Tx Area T1Area E Area L Area JArea K Clearing mailbox, finisher, or output expander jams Area M Clearing fuser jamsClearing fuser jams Clearing image transfer unit jams Clearing paper jams Clearing paper jams Clearing paper jams Clearing paper jams Clearing paper jams If you still need help Adjusting operator panel brightness and contrast Disabling operator panel menusEnabling operator panel menus Restoring factory default settingsAdministrative support Adjusting Power Saver Encrypting the diskUsing the secure Embedded Web Server Setting security using the Embedded Web Server EWSSetting the system password Click ConfigurationSupporting IPSec Internet Protocol Security Using Secure modeClick TCP/IP Port Access Click Menu Lockout Setup Using 802.1x AuthenticatingClick 802.1x Authentication Locking the operator panel menusClick Confidential Print Setup Black only modeConfidential Print Setup Printing LockoutAligning the image transfer unit Disabling size sensing Using the Coverage EstimatorSize sensing Using MarkVision Professional Configuring printer alertsUsing the Setup Menu Using MarkVision MessengerChecking an unresponsive printer Online customer support Calling for serviceSymptom Cause Solution Check the Print as image boxSet Page Protect to Off from Print Recovery Solving printing problemsTroubleshooting Output expander jams Area M Solving mailbox problemsFor more informations, see Clearing mailbox, finisher, or Option Action Solving option problemsSee Solving high capacity feeder problems Solving high capacity feeder problems Problem SolutionSee Loading the trays or Loading Solving paper feed problemsSolving print quality problems Paper pathMarks occur down the page repeatedly in all Marks occur repeatedly only in one colorMultiple times on a ColorsTo be replaced Cartridges BCD E What is RGB color? Solving color quality problemsFrequently asked questions FAQ about color printing How does the printer know what color to print?What is Manual Color Correction? Is it possible to increase the gloss in the printed output?What are Detailed Color Samples and how do I access them? RGB101 Industry Canada compliance statement With a network cable installedElectronic emission notices Avis de conformité aux normes de l’industrie du CanadaWithout a network cable installed Korean MIC statement104 Hinweis zum GS-Zeichen Noise emission levelsGerman GS mark notice Durchschnittlicher Schallpegel dBA in 1 m UmkreiProduct energy consumption Power SaverMode Description Power consumption Total energy usageLaser advisory label Laser noticeStatement of Limited Warranty Lexmark International, Inc. Lexington, KY109 Index Index PIN112

C772, C770 specifications

The Lexmark C770 and C772 series of printers are robust color laser printers designed for medium to large workgroups that demand high-quality printing along with impressive speed and efficiency. These models stand out due to their impressive set of features and advanced technologies, catering to a range of business printing needs.

One of the hallmarks of the Lexmark C770 and C772 is their print quality. With a resolution of up to 1200 x 1200 dpi, these printers deliver sharp text and vibrant color graphics, making them ideal for producing professional-looking documents, presentations, and marketing materials. Additionally, the printers utilize Lexmark's unique Unison toner technology, which ensures consistent, high-quality printing throughout the life of the cartridge, reducing the need for frequent replacements and maximizing productivity.

Speed is another significant advantage of the C770 and C772 series. Both models are capable of printing at impressive speeds of up to 35 pages per minute for black and white prints and slightly lower for color documents. This rapid output allows businesses to meet tight deadlines without compromising on quality. Furthermore, the first-page-out time is notably fast, ensuring that users do not waste time waiting for their documents.

Connectivity options are extensive with the C770 and C772. These printers support USB, Ethernet, and optional wireless connections, enabling seamless integration into various network environments. This flexibility allows multiple users and devices to access the printer, facilitating collaboration and streamlining workflows.

Additionally, user-friendly features such as a large, intuitive LCD screen and an easy-to-navigate interface simplify printer management and operation. The printers also support advanced finishing options, including duplex printing, which saves paper and reduces costs, making them environmentally friendly choices for businesses.

Moreover, security features are incorporated to protect sensitive data, with options for secure printing and data encryption. This makes these printers suitable for environments where confidentiality is crucial.

In summary, the Lexmark C770 and C772 series are powerful color laser printers that combine exceptional print quality, impressive speed, versatile connectivity, and advanced features, making them a worthy investment for businesses looking to enhance their printing capabilities.
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