Scanner resolution and color, Recommended color settings | HP 2820

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

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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 help Table of contents Printing Viii Fax Scan Photo Managing the device and maintenance Xii Managing supplies Xiii Appendix a Accessories and ordering information Xiv Device basics Setting up the device Quick access to device informationWhere to look for more information Using the device Quick 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, copier Enww 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 tips What other software is available? Software for WindowsHow do I get the latest printing software? Printer drivers HP Director Software for MacintoshHP Toolbox PPDs Mac OS Embedded 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 Programs Media 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 tray Loading documents to scan To load originals onto the flatbed scanner To 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 type To 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 Windows Printing from the Macintosh OS To print from the Macintosh OS Selecting 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 printing Reducing 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 letterhead Envelopes Heavy paper Transparencies HP LaserJet Tough paperLabels Printing on different paper for the first Printing on both sides duplexing manually To duplex manually On 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 options RGB 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 setting To 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 panel To set the time and date To set the fax header To 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 recipients To 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 manually To 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 faxes Sending a fax by dialing from a telephone To send a fax by dialing from a telephone Changing the default light/dark contrast setting To change the default light/dark contrast setting Changing the default resolution setting To change the default resolution setting Changing the default glass-size setting To change the default glass-size setting Selecting tone-dialing or pulse-dialing mode To select tone-dialing or pulse-dialing To change the redial-on-busy option Changing the redial settingsTo change the redial-on-communication-error option To change the redial-on-no-answer option To turn off the receive-to-PC setting from the control panel Receiving faxes to your computer Setting the answer mode To set the answer mode Changing ring patterns for call answering To change ring patterns for call answering Recommended rings-to-answer setting Changing the rings-to-answer settingUsing the rings-to-answer setting To set the number of rings-to-answer Changing autoreduction settings for incoming faxes To change autoreduction for incoming faxes Blocking or unblocking fax numbers To block or unblock a fax number To 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 entries To delete an individual from a group-dial entry To delete all phone book entries Button number Characters Using dialing charactersTo insert a pause Inserting a dial prefix To set the dial prefix Sending a delayed fax To send a delayed fax Changing the detect-dial-tone setting To change the detect-dial-tone setting To 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 memory Using fax forwarding To use fax forwarding Making an extension telephone available to receive faxes To make an extension telephone available to receive faxes Using fax polling To poll request a fax from another fax machine Changing the silence-detect mode To change the silence-detect mode Creating stamp-received faxes To make stamp-received faxes available Setting the fax-error-correction mode To change the error-correction setting Changing the V.34 setting To change the V.34 setting Fax Scan 117 Understanding scanning methods Scanning to e-mail Scanning from the device control panel WindowsProgramming the device Scan to button Scanning to a folder Enww Canceling a scan job Scanning by using HP Director Windows To view HP Director Scanning from the device and HP Director Macintosh Scanning to a file Scanning to a software program Using 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 program Scanning a book Scanning a photo or a bookScanning a photo Enww Scanning by using optical character recognition OCR software Readiris Intended use Recommended resolution Scanner resolution and colorResolution and color guidelines Recommended color settings Setting Recommended use Color Enww 10Photo 133 Inserting 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? 141 Print 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 sizes Click 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 card Use a proof sheet Save photos from a memory card to my computer Copy How do I? Reduce or enlarge an original Fax How do I? Send a fax from the device Answer Mode Automatic To change default fax send settingsTo change default fax receive settings Create a fax cover To create a cover page from a program Send a fax from my computerTo create a cover page template Click Pages in Document Tray To 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 program Forward received faxes to another fax number Set up speed dialsTo set up speed dials Click Fax Phone Book To add a contact View and print previously received faxesAdd or delete a contact Click Fax Receive Log Import contacts from another source To delete a contact Create 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 computer Add 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 address To add a folder To edit a folder Receive toner warnings from the device at my computer Clean the paper pathOther How do I? Receive toner warning e-mail messages from the device View the control-panel menu items for the device Restore factory-set default settingsClick the Troubleshooting Tools link Replace print cartridges Enww Replace the imaging drum Enww Clear jams To clear a media jam inside the device To clear output area jams Enww To clear a media jam from the automatic document feeder ADF Enww Order new supplies Click Continue Enww 12Managing the device and maintenance 177 Demo ConfigurationInformation pages Usage Supplies Status Enww HP Toolbox To view HP Toolbox Scan to tab Status tabFax tab Troubleshooting tab Documentation tab Print Settings tab Device Settings pagesSystem Settings tab Network Settings tab Fax Settings tabCopy Settings tab HP Toolbox links Macintosh Configure Device Mac OS 10.2 To view Macintosh Configure Device Features Embedded Web server Printing a fax call report Fax logs and reportsPrinting the fax activity log To print the fax activity log To 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 list To 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 backing Cleaning the paper path To clean the paper path from HP Toolbox To clean the paper path from the device control panel Changing the automatic document feeder ADF To change the ADF Enww To change the ADF pickup roller assembly See Service and support To clean the ADF pickup roller assembly Enww 13Managing supplies 201 To check status and order supplies by using HP Toolbox Checking status and ordering supplies Storing supplies Replacing and recycling supplies Resetting the printer for non-HP supplies HP policy on non-HP supplies HP fraud hotline Changing a print cartridge To replace a print cartridge Enww Changing the imaging drum To change the imaging drum Enww 14Troubleshooting 211 Support strategy Step Verification step Number Is the power on? Troubleshooting processTroubleshooting checklist Possible problems Do 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 error Fax memory full Canceling recv Control panel message Description Fax is busy Canceled sendFax was busy. The device has canceled Sending the fax Fax 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 group No document sent No fax answer Redial pending Paper jam in area Photos Not Found Scanning error Cannot connectControl panel message Description Photo Job Pending Proof Sheet Flatbed Only Critical error messages Critical error messages Error Turn off then on Control panel message Description Scanner ErrorErrors Hardware error Fan Error Turn off then on 54.2, 55.1, 59.16, 59.192 Sensor error Control panel message Description Engine errorError Media jams occur in the device Where to look for jamsClearing jams Tips to avoid media jams Few 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 specifications Paper 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 guidelines Solving print-media problems Performance problems Problem Cause Solution See Media-handling problems Cause Solution Scan problemsSolving scanned image problems Part of the image did not scan Scan quality problems Preventing problems Loaded 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 faxes Fax 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 printing Issues with photo printing Proof sheet not scanning Wrong 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 report Restoring the factory-set defaults Service menuTroubleshooting tab To view HP Toolbox To clean the paper path Cleaning the paper pathTo restore the factory-set defaults Protocol trace Becomes blank Was the device exposed to an electric or magnetic field? 273 Accessories and orderingInformation Supplies Product name Description Memory Product name Description Part number Cable and interface accessories Paper-handling accessories Paper and other print media Inkjet paper is not recommended for this device Print problems User-replaceable parts Language Part number Supplementary documentationUser guides Service and support Hewlett-Packard limited warranty statement Appendix 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 Service Enww Supplies specifications Device specificationsPhysical specifications Electrical specifications Recommended Operating Storage Environmental specificationsSound Power Level Declared per ISO 9296 SPL-Bystander Position Declared per ISO 9296 Regulatory information Introduction Telephone 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 supplies Nederlands Non-U.S. returns Paper Material restrictions Taiwan Declaration of conformity Product Options HP Color LaserJet 2830 and 2840 all-in-one Canadian DOC statement Country-/region-specific safety statementsLaser safety statement Korean EMI statement Finnish laser statement Laserturvallisuus Luokan 1 Laserlaite Klass 1 Laser Apparat Glossary ADF Isdn Twain USB Symbols/Numerics Index Enww Enww Enww Enww ADF Enww Enww Enww See also trays Enww Enww Page Q3948-90901