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HP 2820 Scanner resolution and color, Resolution and color guidelines, Recommended color settings

Models: 2830 2820 2840

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Scanner resolution and color

Note

Note

If you are printing a scanned image, and the quality is not what you expected, you might have selected a resolution or color setting in the scanner software that does not match your needs. Resolution and color affect the following features of scanned images:

●Image clarity

●Texture of gradations (smooth or rough)

●Scan time

●File size

Scanning resolution is measured in pixels per inch (ppi). Color, grayscale, and black and white define the number of colors possible. You can adjust the scanner hardware resolution to up to 1200 ppi. The software can perform an enhanced resolution up to 9,600 ppi. You can set color and grayscale at 1 bit (black and white), or at 8 bit (256 levels of gray) to 24 bit (true color).

The resolution and color guidelines table lists simple tips that you can follow to meet your scanning needs.

Setting the resolution and color to a high value can create large files that take up disk space and slow the scanning process. Before setting the resolution and color, determine how you are going to use the scanned image.

The best resolution for color and grayscale images is achieved by scanning from the flatbed scanner rather than from the automatic document feeder (ADF).

Resolution and color guidelines

The following table describes the recommended resolution and color settings for different types of scan jobs.

Intended use	Recommended resolution
Fax	150 ppi
E-mail	150 ppi

Edit text	300 ppi
Print (graphics or text)	600 ppi for complex graphics,
	or if you want to significantly
	enlarge the document
	300 ppi for normal graphics
	and text
	150 ppi for photos

Recommended color settings

● Black and White

●Black and White, if the image does not require smooth gradation

●Grayscale, if the image requires smooth gradation

●Color, if the image is in color

● Black and White

●Black and White for text and line art

●Grayscale for shaded or colored graphics and photos

●Color, if the image is in color

130 Chapter 9 Scan

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HP 2820, 2840, 2830 manual Scanner resolution and color, Resolution and color guidelines, Intended use Recommended resolution

Contents

HP Color LaserJet 2820/2830/2840 Page User Guide Copyright and License Trademark Credits Page Customer self-repair Service and supportHP direct ordering for accessories or supplies HP Toolbox HP service informationHP service agreements Software helpTable of contents Printing ViiiFax Scan Photo Managing the device and maintenance XiiManaging supplies XiiiAppendix a Accessories and ordering information XivDevice basics Setting up the device Quick access to device informationWhere to look for more information Using the deviceQuick access to device information HP Color LaserJet 2830 all-in-one Device configurationsHP Color LaserJet 2820 all-in-one HP Color LaserJet 2840 all-in-one Device features Supplies Energy savingsEconomical printing Online user guide that is compatible with Back view Device partsFront view Interface ports Control panel HP Color LaserJet 2820 all-in-one printer, scanner, copierEnww Software HP Color LaserJet 2820/2830/2840 all-in-one software Printer driversSoftware and supported operating systems How do I gain access to the device features? Software tipsWhat other software is available? Software for WindowsHow do I get the latest printing software? Printer driversHP Director Software for MacintoshHP Toolbox PPDs Mac OSEmbedded Web server EWS Software installationTypical installation Minimum installation Uninstalling software for Macintosh Uninstalling the printing softwareUsing Add or Remove Programs to uninstall Double-clickAdd or Remove ProgramsMedia specifications General guidelines Media Dimensions Weight Capacity Supported media weights and sizesTray 1 specifications Automatic document feeder ADF paper sizes Optional tray 2 specificationsMedia Dimensions Weight or thickness Capacity Printing and storage environment Enww Using the device To load tray Loading traysLoading tray Loading optional tray To load optional trayLoading documents to scan To load originals onto the flatbed scannerTo load originals into the automatic document feeder ADF Changing the device control-panel display language Using the device control panelChanging the default media size To change the default paper tray size Using the device volume controlsChanging the default paper tray configuration To change the default paper tray typeTo change the ring volume of the fax To change the alarm volumeTo change the volume for the fax To change the device control panel key-press volume Enww Printing Printing from Windows To print from WindowsPrinting from the Macintosh OS To print from the Macintosh OSSelecting a type or size Using the PCL printer-driver Help Windows onlySelecting a source Printing in grayscale Creating and using watermarksCreating and using Quick Sets Printing multiple pages on one sheet of paper N-up printingReducing or enlarging Fit to Maximizing print speed for letter-size paper Selecting an output location Setting a custom paper size Colored paper Printing on special mediaGlossy paper Preprinted forms and letterheadEnvelopes Heavy paperTransparencies HP LaserJet Tough paperLabels Printing on different paper for the first Printing on both sides duplexing manually To duplex manuallyOn the Finishing tab, select Print on Both Sides Printing bookletsTo print booklets Enww Canceling a print job Enww Printing with color Changing the color settings HP ImageREt Using colorMedia selection Print in Grayscale Automatic versus Manual color adjustmentManaging color options Manual color optionsRGB Color Halftone optionsNeutral Grays Matching colors Copy Starting a copy job Canceling a copy job To adjust the default copy quality Adjusting the copy qualityTo adjust the copy quality for the current job To adjust the default lighter/darker setting Adjusting the lighter/darker contrast settingTo adjust the lighter/darker setting for the current job Reducing or enlarging copies To reduce or enlarge copies for the current job To change the default copy size Changing the copy-collation setting To change the default copy-collation settingTo change the number of copies for the current job To change the default number of copiesChanging the number of copies To copy a multiple-page stack of two-sided originals Copying photos, two-sided originals, or booksTo copy a photo To copy a book Fax Changing the silence-detect mode Specifying the fax settings To enter text from the control panelTo set the time and date To set the fax headerTo send a fax to one recipient To adjust the resolution for the current fax jobSending faxes To send a fax by using a group-dial entry To send a fax to multiple recipientsTo send a fax to a group manually ad hoc faxing To use manual dial with the flatbed scanner Using manual dialTo use manual dial with the automatic document feeder ADF Redialing manually To redial manuallyTo cancel a fax job by using the Fax Job Status Canceling a fax jobTo cancel the current fax job To send a fax from the software Mac OS 10.2 or Sending faxes by using the softwareTo send a fax from the software Windows 2000 or XP Fax To receive faxes when you hear fax tones Receiving faxesSending a fax by dialing from a telephone To send a fax by dialing from a telephoneChanging the default light/dark contrast setting To change the default light/dark contrast settingChanging the default resolution setting To change the default resolution settingChanging the default glass-size setting To change the default glass-size settingSelecting tone-dialing or pulse-dialing mode To select tone-dialing or pulse-dialingTo change the redial-on-busy option Changing the redial settingsTo change the redial-on-communication-error option To change the redial-on-no-answer optionTo turn off the receive-to-PC setting from the control panel Receiving faxes to your computerSetting the answer mode To set the answer modeChanging ring patterns for call answering To change ring patterns for call answeringRecommended rings-to-answer setting Changing the rings-to-answer settingUsing the rings-to-answer setting To set the number of rings-to-answerChanging autoreduction settings for incoming faxes To change autoreduction for incoming faxesBlocking or unblocking fax numbers To block or unblock a fax numberTo program speed-dial entries and one-touch keys To manage group-dial entries To delete speed-dial entries and one-touch keysTo program speed-dial entries or one-touch keys quickly To program group-dial entries To delete group-dial entriesTo delete an individual from a group-dial entry To delete all phone book entriesButton number Characters Using dialing charactersTo insert a pause Inserting a dial prefix To set the dial prefixSending a delayed fax To send a delayed faxChanging the detect-dial-tone setting To change the detect-dial-tone settingTo use billing codes Using billing codesTo change the billing-code setting To reprint a fax To change the fax reprint settingsReprinting a fax Deleting faxes from memory To delete faxes from memoryUsing fax forwarding To use fax forwardingMaking an extension telephone available to receive faxes To make an extension telephone available to receive faxesUsing fax polling To poll request a fax from another fax machineChanging the silence-detect mode To change the silence-detect modeCreating stamp-received faxes To make stamp-received faxes availableSetting the fax-error-correction mode To change the error-correction settingChanging the V.34 setting To change the V.34 settingFax Scan 117Understanding scanning methods Scanning to e-mail Scanning from the device control panel WindowsProgramming the device Scan to button Scanning to a folderEnww Canceling a scan job Scanning by using HP Director Windows To view HP DirectorScanning from the device and HP Director Macintosh Scanning to a file Scanning to a software programUsing page-by-page scanning Scanning from a WIA-enabled program Windows XP only Using TWAIN-compliant and WIA-compliant softwareScanning from a TWAIN-enabled program To scan from a TWAIN-enabled programScanning a book Scanning a photo or a bookScanning a photo Enww Scanning by using optical character recognition OCR software ReadirisIntended use Recommended resolution Scanner resolution and colorResolution and color guidelines Recommended color settingsSetting Recommended use ColorEnww 10Photo 133Inserting a memory card Changing default settings Changing job settings Printing photos directly from the memory card Printing photos from a proof sheet Printing an index Photo 11How do I? 141Print How do I? Print on special media, such as glossy or photo paper Print on both sides of the paper Print on envelopes and custom media sizesClick the System Settings tab Enww Network How do I? Set up the device and use it on the networkClick Install HP Color LaserJet Software Faxes Click Password Set my network passwordClick the Network Settings tab Print a particular photo from a memory card Enable or disable memory cardsPhoto How do I? Print all the photos that are stored on a memory cardUse a proof sheet Save photos from a memory card to my computerCopy How do I? Reduce or enlarge an originalFax How do I? Send a fax from the deviceAnswer Mode Automatic To change default fax send settingsTo change default fax receive settings Create a fax coverTo create a cover page from a program Send a fax from my computerTo create a cover page template Click Pages in Document TrayTo send a fax from the HP LaserJet Send Fax software Receive faxes to my computerTo send a fax from HP Toolbox To send a fax directly from another programForward received faxes to another fax number Set up speed dialsTo set up speed dials Click Fax Phone BookTo add a contact View and print previously received faxesAdd or delete a contact Click Fax Receive LogImport contacts from another source To delete a contactCreate a new group list Standard Fine Super Fine Photo Scan from the device control panel Set up the Scan to button on the control panelScan How do I? Save a scan to a folder on my computerAdd or edit folders for scanning to a folder Send a scan to an e-mail messageAdd or edit e-mail addresses for scanning to e-mail To add an e-mail addressTo add a folder To edit a folderReceive toner warnings from the device at my computer Clean the paper pathOther How do I? Receive toner warning e-mail messages from the deviceView the control-panel menu items for the device Restore factory-set default settingsClick the Troubleshooting Tools link Replace print cartridgesEnww Replace the imaging drum Enww Clear jams To clear a media jam inside the deviceTo clear output area jams Enww To clear a media jam from the automatic document feeder ADF Enww Order new supplies Click ContinueEnww 12Managing the device and maintenance 177Demo ConfigurationInformation pages UsageSupplies Status Enww HP Toolbox To view HP ToolboxScan to tab Status tabFax tab Troubleshooting tab Documentation tabPrint Settings tab Device Settings pagesSystem Settings tab Network Settings tab Fax Settings tabCopy Settings tab HP Toolbox linksMacintosh Configure Device Mac OS 10.2 To view Macintosh Configure DeviceFeatures Embedded Web serverPrinting a fax call report Fax logs and reportsPrinting the fax activity log To print the fax activity logTo set the print times for the fax call report Setting print times for the fax call reportTo print a fax call report Printing the billing-code report Including the first page of each fax on the fax call reportPrinting a phone book report Printing the block-fax listTo print all fax reports Printing all fax reportsTo print the block-fax list To clean the scanner glass Cleaning the deviceTo clean the exterior To clean the lid backingCleaning the paper path To clean the paper path from HP Toolbox To clean the paper path from the device control panelChanging the automatic document feeder ADF To change the ADFEnww To change the ADF pickup roller assembly See Service and support To clean the ADF pickup roller assembly Enww 13Managing supplies 201To check status and order supplies by using HP Toolbox Checking status and ordering suppliesStoring supplies Replacing and recycling supplies Resetting the printer for non-HP supplies HP policy on non-HP suppliesHP fraud hotline Changing a print cartridge To replace a print cartridgeEnww Changing the imaging drum To change the imaging drumEnww 14Troubleshooting 211Support strategy Step Verification step Number Is the power on? Troubleshooting processTroubleshooting checklist Possible problemsDo information pages print? Does the device copy?Does the device receive Does the device print from the computer?Possible problems Solutions Does the device recognize and print from a memory card?Alert and warning messages Control panel messagesAlert and warning messages Engine error Comm. errorDevice error. Enter to Communication errorFax memory full Canceling recv Control panel message Description Fax is busy Canceled sendFax was busy. The device has canceled Sending the faxFax recv. error Fit to Page on flatbed only Control panel message Description Fax Send errorMem. low 1 copy Press cancel Group dial not allowed in groupNo document sent No fax answer Redial pendingPaper jam in area Photos Not Found Scanning error Cannot connectControl panel message Description Photo Job Pending Proof Sheet Flatbed OnlyCritical error messages Critical error messagesError Turn off then on Control panel message Description Scanner ErrorErrors Hardware error Fan Error Turn off then on 54.2, 55.1, 59.16, 59.192Sensor error Control panel message Description Engine errorError Media jams occur in the device Where to look for jamsClearing jams Tips to avoid media jamsFew sheets have been printed To clear output area jams Media jams occur in the automatic document feeder ADF Open the ADF cover Enww Improving print quality Print problemsPrint quality problems Identifying and correcting print defects Print-quality checklistGeneral print quality issues Solution Problem Cause Print is light or fadedHP specifications Problem Cause Problem Media might not meet HP specificationsPaper tab and set Type is to Printed page contains Solving issues with color documents Device might not be correctly configured Media-handling problems Print-media guidelinesSolving print-media problems Performance problems Problem Cause SolutionSee Media-handling problems Cause Solution Scan problemsSolving scanned image problems Part of the image did not scan Scan quality problems Preventing problemsLoaded upside down Solving scan-quality problemsProblem Cause Blank pages Image problems Copy problemsPreventing problems From a faulty paper lot Media guides might be incorrectly adjusted More information Enww Fax problems Problems receiving faxesFax problems Received while the input tray is Problems sending faxes Faxes stop during sending Voice call problems Print is skewed Pages are curled or wrinkled See Using the device volume controls Index page not printing Memory card problemsMissing or wrong files Proof sheet not printingIssues with photo printing Proof sheet not scanningWrong photo printed Photo did not print Scanner did not read proof sheet Fax reports Troubleshooting toolsDevice pages and reports Phone book report Fax activity logFax call report Billing-code reportRestoring the factory-set defaults Service menuTroubleshooting tab To view HP ToolboxTo clean the paper path Cleaning the paper pathTo restore the factory-set defaults Protocol traceBecomes blank Was the device exposed to an electric or magnetic field?273 Accessories and orderingInformation Supplies Product name DescriptionMemory Product name Description Part numberCable and interface accessories Paper-handling accessories Paper and other print media Inkjet paper is not recommended for this devicePrint problems User-replaceable partsLanguage Part number Supplementary documentationUser guides Service and support Hewlett-Packard limited warranty statementAppendix B Service and support Print Cartridge and Imaging Drum Limited Warranty Statement Enww Onsite service agreements Availability of support and serviceHP maintenance agreements Priority Onsite ServiceEnww Supplies specifications Device specificationsPhysical specifications Electrical specificationsRecommended Operating Storage Environmental specificationsSound Power Level Declared per ISO 9296 SPL-Bystander Position Declared per ISO 9296Regulatory information IntroductionTelephone Consumer Protection Act United States IC CS-03 requirements EU statement for telecom operation New Zealand telecom statements Energy consumption Environmental Product Stewardship programOzone production HP LaserJet printing suppliesNederlands Non-U.S. returns Paper Material restrictionsTaiwan Declaration of conformity Product OptionsHP Color LaserJet 2830 and 2840 all-in-one Canadian DOC statement Country-/region-specific safety statementsLaser safety statement Korean EMI statementFinnish laser statement Laserturvallisuus Luokan 1 Laserlaite Klass 1 Laser ApparatGlossary ADFIsdn Twain USB Symbols/Numerics IndexEnww Enww Enww Enww ADF Enww Enww Enww See also trays Enww Enww Page Q3948-90901