Scan quality problems, Preventing problems | HP 2830, 2840, 2820

Problem

Cause

Solution

The scan takes too long	The resolution or color level is
	set too high.

The software is set to scan in color.

A print job or copy job was sent before you tried to scan.

Change the resolution and color level settings to the correct settings for your job. See Scanner resolution and color.

The system default is color, which takes longer to scan even when scanning a monochrome original. If you acquire an image through TWAIN or WIA, you can change the settings so that the original scans in grayscale or black-and-white. See the device software Help for details.

If someone sent a print job or copy job before you tried to scan, the scan will start if the scanner is not busy. However, because the printer and scanner share memory, the scan might be slower.

Scan quality problems

This section provides information about improving scan quality by preventing or correcting problems.

Preventing problems

The following are a few simple steps you can take to improve copy and scan quality.

●Use the flatbed scanner, rather than the automatic document feeder (ADF) input tray, to scan.

●Use high-quality originals.

●Load the media correctly. If the media is loaded incorrectly, it might skew, which causes unclear images. See Loading trays for instructions.

●Adjust the software settings according to how you plan to use the scanned page. See Scanner resolution and color for more information.

●If your device frequently feeds more than one page at a time, the separation pad might need to be replaced. Contact HP Customer Care. See Service and support or the flyer that came in the printer box.

●Use or make a carrier sheet to protect your originals.

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HP 2830, 2840, 2820 manual Scan quality problems, Preventing problems

Contents

HP Color LaserJet 2820/2830/2840 Page User Guide Copyright and License Trademark Credits Page HP direct ordering for accessories or supplies Service and supportCustomer self-repair HP service agreements HP service informationHP Toolbox Software help Table of contents Viii Printing Fax Scan Photo Xii Managing the device and maintenance Xiii Managing supplies Xiv Appendix a Accessories and ordering information Device basics Where to look for more information Quick access to device informationSetting up the device Using the device Quick access to device information HP Color LaserJet 2820 all-in-one Device configurationsHP Color LaserJet 2830 all-in-one HP Color LaserJet 2840 all-in-one Device features Economical printing Energy savingsSupplies Online user guide that is compatible with Front view Device partsBack view Interface ports HP Color LaserJet 2820 all-in-one printer, scanner, copier Control panel Enww Software Software and supported operating systems Printer driversHP Color LaserJet 2820/2830/2840 all-in-one software Software tips How do I gain access to the device features? How do I get the latest printing software? Software for WindowsWhat other software is available? Printer drivers HP Toolbox Software for MacintoshHP Director PPDs Mac OS Typical installation Software installationEmbedded Web server EWS Minimum installation Using Add or Remove Programs to uninstall Uninstalling the printing softwareUninstalling software for Macintosh Double-clickAdd or Remove Programs Media specifications General guidelines Tray 1 specifications Supported media weights and sizesMedia Dimensions Weight Capacity Media Dimensions Weight or thickness Capacity Optional tray 2 specificationsAutomatic document feeder ADF paper sizes Printing and storage environment Enww Using the device Loading tray Loading traysTo load tray To load optional tray Loading optional tray To load originals onto the flatbed scanner Loading documents to scan To load originals into the automatic document feeder ADF Changing the default media size Using the device control panelChanging the device control-panel display language Changing the default paper tray configuration Using the device volume controlsTo change the default paper tray size To change the default paper tray type To change the volume for the fax To change the alarm volumeTo change the ring volume of the fax To change the device control panel key-press volume Enww Printing To print from Windows Printing from Windows To print from the Macintosh OS Printing from the Macintosh OS Selecting a source Using the PCL printer-driver Help Windows onlySelecting a type or size Creating and using Quick Sets Creating and using watermarksPrinting in grayscale 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 Glossy paper Printing on special mediaColored paper Preprinted forms and letterhead Heavy paper Envelopes Labels HP LaserJet Tough paperTransparencies Printing on different paper for the first To duplex manually Printing on both sides duplexing manually To print booklets Printing bookletsOn the Finishing tab, select Print on Both Sides Enww Canceling a print job Enww Printing with color Changing the color settings Media selection Using colorHP ImageREt Managing color options Automatic versus Manual color adjustmentPrint in Grayscale Manual color options Neutral Grays Halftone optionsRGB Color Matching colors Copy Starting a copy job Canceling a copy job To adjust the copy quality for the current job Adjusting the copy qualityTo adjust the default copy quality To adjust the lighter/darker setting for the current job Adjusting the lighter/darker contrast settingTo adjust the default lighter/darker setting Reducing or enlarging copies To reduce or enlarge copies for the current job To change the default copy size To change the default copy-collation setting Changing the copy-collation setting Changing the number of copies To change the default number of copiesTo change the number of copies for the current job To copy a photo Copying photos, two-sided originals, or booksTo copy a multiple-page stack of two-sided originals To copy a book Fax Changing the silence-detect mode To enter text from the control panel Specifying the fax settings To set the fax header To set the time and date Sending faxes To adjust the resolution for the current fax jobTo send a fax to one recipient To send a fax to multiple recipients To send a fax by using a group-dial entry To send a fax to a group manually ad hoc faxing To use manual dial with the automatic document feeder ADF Using manual dialTo use manual dial with the flatbed scanner To redial manually Redialing manually To cancel the current fax job Canceling a fax jobTo cancel a fax job by using the Fax Job Status To send a fax from the software Windows 2000 or XP Sending faxes by using the softwareTo send a fax from the software Mac OS 10.2 or Fax Receiving faxes To receive faxes when you hear fax tones To send a fax by dialing from a telephone Sending a fax by dialing from a telephone To change the default light/dark contrast setting Changing the default light/dark contrast setting To change the default resolution setting Changing the default resolution setting To change the default glass-size setting Changing the default glass-size setting To select tone-dialing or pulse-dialing Selecting tone-dialing or pulse-dialing mode To change the redial-on-communication-error option Changing the redial settingsTo change the redial-on-busy option To change the redial-on-no-answer option Receiving faxes to your computer To turn off the receive-to-PC setting from the control panel To set the answer mode Setting the answer mode To change ring patterns for call answering Changing ring patterns for call answering Using the rings-to-answer setting Changing the rings-to-answer settingRecommended rings-to-answer setting To set the number of rings-to-answer To change autoreduction for incoming faxes Changing autoreduction settings for incoming faxes To block or unblock a fax number Blocking or unblocking fax numbers To program speed-dial entries and one-touch keys To program speed-dial entries or one-touch keys quickly To delete speed-dial entries and one-touch keysTo manage group-dial entries To delete group-dial entries To program group-dial entries To delete all phone book entries To delete an individual from a group-dial entry To insert a pause Using dialing charactersButton number Characters To set the dial prefix Inserting a dial prefix To send a delayed fax Sending a delayed fax To change the detect-dial-tone setting Changing the detect-dial-tone setting To change the billing-code setting Using billing codesTo use billing codes Reprinting a fax To change the fax reprint settingsTo reprint a fax To delete faxes from memory Deleting faxes from memory To use fax forwarding Using fax forwarding To make an extension telephone available to receive faxes Making an extension telephone available to receive faxes To poll request a fax from another fax machine Using fax polling To change the silence-detect mode Changing the silence-detect mode To make stamp-received faxes available Creating stamp-received faxes To change the error-correction setting Setting the fax-error-correction mode To change the V.34 setting Changing the V.34 setting Fax 117 Scan Understanding scanning methods Programming the device Scan to button Scanning from the device control panel WindowsScanning to e-mail Scanning to a folder Enww Canceling a scan job To view HP Director Scanning by using HP Director Windows Scanning from the device and HP Director Macintosh Scanning to a software program Scanning to a file Using page-by-page scanning Scanning from a TWAIN-enabled program Using TWAIN-compliant and WIA-compliant softwareScanning from a WIA-enabled program Windows XP only To scan from a TWAIN-enabled program Scanning a photo Scanning a photo or a bookScanning a book Enww Readiris Scanning by using optical character recognition OCR software Resolution and color guidelines Scanner resolution and colorIntended use Recommended resolution Recommended color settings Color Setting Recommended use Enww 133 10Photo 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 141 11How do I? Print How do I? Print on special media, such as glossy or photo paper Print on envelopes and custom media sizes Print on both sides of the paper Click the System Settings tab Enww Click Install HP Color LaserJet Software Set up the device and use it on the networkNetwork How do I? Faxes Click the Network Settings tab Set my network passwordClick Password Photo How do I? Enable or disable memory cardsPrint a particular photo from a memory card Print all the photos that are stored on a memory card Save photos from a memory card to my computer Use a proof sheet Reduce or enlarge an original Copy How do I? Send a fax from the device Fax How do I? To change default fax receive settings To change default fax send settingsAnswer Mode Automatic Create a fax cover To create a cover page template Send a fax from my computerTo create a cover page from a program Click Pages in Document Tray To send a fax from HP Toolbox Receive faxes to my computerTo send a fax from the HP LaserJet Send Fax software To send a fax directly from another program To set up speed dials Set up speed dialsForward received faxes to another fax number Click Fax Phone Book Add or delete a contact View and print previously received faxesTo add a contact Click Fax Receive Log To delete a contact Import contacts from another source Create a new group list Standard Fine Super Fine Photo Scan How do I? Set up the Scan to button on the control panelScan from the device control panel Save a scan to a folder on my computer Add or edit e-mail addresses for scanning to e-mail Send a scan to an e-mail messageAdd or edit folders for scanning to a folder To add an e-mail address To edit a folder To add a folder Other How do I? Clean the paper pathReceive toner warnings from the device at my computer Receive toner warning e-mail messages from the device Click the Troubleshooting Tools link Restore factory-set default settingsView the control-panel menu items for the device Replace print cartridges Enww Replace the imaging drum Enww To clear a media jam inside the device Clear jams To clear output area jams Enww To clear a media jam from the automatic document feeder ADF Enww Click Continue Order new supplies Enww 177 12Managing the device and maintenance Information pages ConfigurationDemo Usage Supplies Status Enww To view HP Toolbox HP Toolbox Fax tab Status tabScan to tab Documentation tab Troubleshooting tab System Settings tab Device Settings pagesPrint Settings tab Copy Settings tab Fax Settings tabNetwork Settings tab HP Toolbox links To view Macintosh Configure Device Macintosh Configure Device Mac OS 10.2 Embedded Web server Features Printing the fax activity log Fax logs and reportsPrinting a fax call report To print the fax activity log To print a fax call report Setting print times for the fax call reportTo set the print times for the fax call report Printing a phone book report Including the first page of each fax on the fax call reportPrinting the billing-code report Printing the block-fax list To print the block-fax list Printing all fax reportsTo print all fax reports To clean the exterior Cleaning the deviceTo clean the scanner glass To clean the lid backing Cleaning the paper path To clean the paper path from the device control panel To clean the paper path from HP Toolbox To change the ADF Changing the automatic document feeder ADF Enww To change the ADF pickup roller assembly See Service and support To clean the ADF pickup roller assembly Enww 201 13Managing supplies Checking status and ordering supplies To check status and order supplies by using HP Toolbox Storing supplies Replacing and recycling supplies HP policy on non-HP supplies Resetting the printer for non-HP supplies HP fraud hotline To replace a print cartridge Changing a print cartridge Enww To change the imaging drum Changing the imaging drum Enww 211 14Troubleshooting Support strategy Troubleshooting checklist Troubleshooting processStep Verification step Number Is the power on? Possible problems Does the device copy? Do information pages print? Does the device print from the computer? Does the device receive Does the device recognize and print from a memory card? Possible problems Solutions Alert and warning messages Control panel messagesAlert and warning messages Device error. Enter to Comm. errorEngine error Communication error Fax was busy. The device has canceled Control panel message Description Fax is busy Canceled sendFax memory full Canceling recv Sending the fax Fax recv. error Mem. low 1 copy Press cancel Control panel message Description Fax Send errorFit to Page on flatbed only Group dial not allowed in group No fax answer Redial pending No document sent Paper jam in area Control panel message Description Photo Job Pending Scanning error Cannot connectPhotos Not Found Proof Sheet Flatbed Only Critical error messages Critical error messages Errors Hardware error Fan Error Turn off then on Control panel message Description Scanner ErrorError Turn off then on 54.2, 55.1, 59.16, 59.192 Error Control panel message Description Engine errorSensor error Clearing jams Where to look for jamsMedia jams occur in the device 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 Print quality problems Print problemsImproving print quality General print quality issues Print-quality checklistIdentifying and correcting print defects HP specifications Problem Cause Print is light or fadedSolution Problem Cause Media might not meet HP specifications Problem Paper tab and set Type is to Printed page contains Solving issues with color documents Device might not be correctly configured Print-media guidelines Media-handling problems Solving print-media problems Problem Cause Solution Performance problems See Media-handling problems Solving scanned image problems Scan problemsCause Solution Part of the image did not scan Preventing problems Scan quality problems Problem Cause Blank pages Solving scan-quality problemsLoaded upside down Preventing problems Copy problemsImage problems From a faulty paper lot Media guides might be incorrectly adjusted More information Enww Problems receiving faxes Fax problems 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 Missing or wrong files Memory card problemsIndex page not printing Proof sheet not printing Proof sheet not scanning Issues with photo printing Wrong photo printed Photo did not print Scanner did not read proof sheet Device pages and reports Troubleshooting toolsFax reports Fax call report Fax activity logPhone book report Billing-code report Troubleshooting tab Service menuRestoring the factory-set defaults To view HP Toolbox To restore the factory-set defaults Cleaning the paper pathTo clean the paper path Protocol trace Was the device exposed to an electric or magnetic field? Becomes blank Information Accessories and ordering273 Product name Description Supplies Product name Description Part number Memory Cable and interface accessories Paper-handling accessories Inkjet paper is not recommended for this device Paper and other print media User-replaceable parts Print problems User guides Supplementary documentationLanguage Part number Hewlett-Packard limited warranty statement Service and support Appendix B Service and support Print Cartridge and Imaging Drum Limited Warranty Statement Enww HP maintenance agreements Availability of support and serviceOnsite service agreements Priority Onsite Service Enww Physical specifications Device specificationsSupplies specifications Electrical specifications Sound Power Level Declared per ISO 9296 Environmental specificationsRecommended Operating Storage SPL-Bystander Position Declared per ISO 9296 Introduction Regulatory information Telephone Consumer Protection Act United States IC CS-03 requirements EU statement for telecom operation New Zealand telecom statements Ozone production Environmental Product Stewardship programEnergy consumption HP LaserJet printing supplies Non-U.S. returns Paper Material restrictions Nederlands Taiwan Product Options Declaration of conformity HP Color LaserJet 2830 and 2840 all-in-one Laser safety statement Country-/region-specific safety statementsCanadian DOC statement Korean EMI statement Laserturvallisuus Luokan 1 Laserlaite Klass 1 Laser Apparat Finnish laser statement ADF Glossary Isdn Twain USB Index Symbols/Numerics Enww Enww Enww Enww ADF Enww Enww Enww See also trays Enww Enww Page Q3948-90901