HP Pro L7400 manual Text cannot be edited, Error messages appear, Scanned image quality is poor

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Text cannot be edited

•Check the settings

•Make sure that the OCR software is set to edit text.

•When you scan the original, make sure that you select a document type that creates editable text. If text is classified as a graphic, it is not converted to text.

•Your OCR program might be linked to a word-processing program that does not perform OCR tasks. See the product software Help for more information about linking programs.

•Check the originals

•Make sure that you placed the original correctly on the scanner glass. For more information, see Load originals.

•The OCR program might not recognize text that is tightly spaced. For example, if the text that the OCR program converts has missing or combined characters, "rn" might appear as "m."

•The accuracy of the OCR program depends on the image quality, text size, and structure of the original and the quality of the scan itself. Make sure that your original has good image quality.

•Colored backgrounds can cause images in the foreground to blend too much. Try adjusting the settings before you scan the original, or try enhancing the image after you scan the original. If you are performing an OCR operation on an original, any colored text on the original does not scan well, if at all.

Error messages appear

"Unable to activate TWAIN source" or "An error occurred while acquiring the image"

•If you are acquiring an image from another device, such as a digital camera or another scanner, make sure that the other device is TWAIN-compliant. Devices that are not TWAIN-compliant do not work with the device software.

•Make sure that you have connected the USB Device Cable to the correct port on the back of your computer.

•Verify that the correct TWAIN source is selected. In the software, check the TWAIN source by selecting Select Scanner on the File menu.

Scanned image quality is poor

The original is a second-generation photo or picture

Reprinted photographs, such as those in newspapers or magazines, are printed by using tiny dots of ink that make an interpretation of the original photograph, which degrades the quality. Often, the ink dots form unwanted patterns that can be detected when the image is scanned or printed or when the image appears on a screen. If the following suggestions do not solve the problem, you might need to use a better-quality version of the original.

•To eliminate the patterns, try reducing the size of the image after scanning.

•Print the scanned image to see if the quality is better.

•Make sure that the resolution and color settings are correct for the type of scan job.

Solve scan problems

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Contents HP Officejet Pro L7400 All-in-One series Page HP Officejet Pro L7400 All-in- One series Hewlett-Packard Company notices Safety informationAccessibility Copyright informationContents Scan Configure and manageCopy Maintain and troubleshoot Support and warranty HP supplies and accessoriesRegulatory information Device specificationsLocation Get startedFind other resources for the product Resource DescriptionUnderstand the device parts Printing supplies area Front viewLabel Back viewControl panel buttons and lights Description Recommended Connection informationTo install the duplexer Install the accessoriesInstall the duplexer Install TrayTo install Tray Turn on accessories in the print driverClick Apply Changes To turn on accessories on Windows computersTo turn on accessories on Macintosh computers Status messages Use the deviceUse control panel menus Control-panel message typesTo change settings from the control panel Change device settingsError messages Critical error messagesUse the HP photo and imaging software Use the HP Solution Center WindowsTo open the HP Photosmart Software on a Windows computer Load originalsLoad an original on the scanner glass To load an original on the scanner glass Tips for selecting and using print mediaSelect print media Understand specifications for supported media Envelopes Media size TrayStandard media sizes Other media CardsPhoto media Capacity Understand supported media types and weightsTray Type Weight Paper 60 to 105 g/m2 Media Left Right Top Bottom Margin Load mediaSet minimum margins To load Tray 1 main tray To load Tray Follow these steps Configure traysWant to Print on special and custom-sized media To print a borderless document Windows Click Properties or SetupPrint borderless Open the Paper Type/Quality panel To print a borderless document Mac OSTo change the settings Change print settingsChange default settings for all future jobs Windows Change settings Mac OSTo print manually on both sides of a page Windows Print on both sides duplexingGuidelines for printing on both sides of a Perform duplexingOpen the Two-Sided Printing panel To print manually on both sides of a page Mac OSTo print automatically on both sides of a page Windows To print automatically on both sides of a page Mac OSCancel a print job To make a copy from the control panel Change the copy settingsCopy Make copies from the control panelSet the copy paper type Set the number of copiesSet the copy paper size To change the copy quality from the control panel Paper type Control panel settingChange copy speed or quality To set the paper type for copies from the control panelTo resize a document from the control panel Resize an original to fit onto letter or A4 paperCopy a legal-size document onto letter paper To copy a legal-size document onto letter paper Adjust the lightness and darkness of your copyTo adjust the copy contrast from the control panel Enhance blurred areas of your copyTo copy an overexposed photo from the control panel Cancel a copy jobEnhance light areas of your copy To copy a blurred document from the control panelScan an original ScanScan from a WIA-compliant program Scan from a TWAIN-compliant or a WIA-compliant programEdit a scanned original Scan from a TWAIN-compliant programEdit a scanned photo or graphic Change scan settingsCancel a scan job Mac OS Configure and manageManage the device WindowsMonitor the device Administer the deviceUse device management tools Toolbox tabs Toolbox WindowsOpen the Toolbox HP Printer Utility panels Information and Support panel HP Printer Utility Mac OSHP Instant Support Printer Settings panelMyPrintMileage Understand the self-test diagnosticUnderstand the self-test diagnostic Direct connection Configure the device WindowsShare the device on a locally shared network Connect the device before installing the softwareTo connect the device Share the device on a locally shared network Configure the device Mac OSInstall the software for a direct connection To share the device among computers running Mac OS Uninstall and reinstall the softwareTo uninstall from a Windows computer, method To uninstall from a Windows computer, method Uninstall and reinstall the software Replace the ink cartridges Maintain and troubleshootSupported ink cartridges To replace the ink cartridges Maintain the printheadsCheck printhead health Print the print quality diagnosticAlign the printheads Calibrate the linefeed Clean the printheadsClean the printhead contacts manually To clean the printhead contacts manuallyMaintain the printheads Chapter To replace the printheads Replace the printheadsStore printing supplies Store ink cartridges Clean the deviceClean the scanner glass To clean the scanner glassClean the exterior Troubleshooting tips and resourcesSolve printing problems Device is not responding nothing prints Error message appears on control-panel displayDevice shuts down unexpectedly Blank or partial page printed Device does not accept printheadDevice takes a long time to print Something on the page is missing or incorrect Placement of the text or graphics is wrongCheck the media size Check the page-orientation settingPoor print quality and unexpected printouts Device prints half a page, then ejects the paperMeaningless characters print Poor quality printoutsColors are printing as black and white Ink is smearingInk is not filling the text or graphics completely Output is faded or dull coloredColors do not line up properly Solve paper-feed problemsWrong colors are printing Printout shows bleeding colorsMedia is not picked up from a tray Another paper-feed problem is occurringOptional Tray 2 cannot be inserted Media is not supported for the printer or trayNo copy came out Solve copy problemsCopy quality is poor Copies are blankDocuments are missing or faded Size is reducedCopy defects are apparent Solve scan problemsPart of the document did not scan or text is missing Scanner did nothingScan takes too long Check the originals Error messages appearText cannot be edited Scanned image quality is poorScan defects are apparent Check the hardware connections Troubleshoot installation issuesHardware installation suggestions Size is reducedCheck the device to ensure the following Software installation suggestionsVerify installation preliminaries Check the computer systemTo clear a jam Clear jamsClear a jam in the device Chapter Tips for avoiding jams Supplies HP supplies and accessoriesAccessories Order printing supplies onlineHP media PrintheadsSupport and warranty Hewlett-Packard limited warranty statement Before you call Obtain electronic supportObtain HP telephone support Phone support period If you have a problem, follow these stepsSupport process HP support by phoneAppendix B Support and warranty Placing a call After the phone support period Additional warranty optionsCall HP Korea customer support HP Quick Exchange Service JapanTo remove ink cartridges before shipment Prepare the device for shipmentRemove the ink cartridges and printheads before shipment To remove the control-panel faceplate Remove the control-panel faceplateTo remove printheads before shipment Pack the device To pack the device Processor and memory specifications Device specificationsPhysical specifications Product features and capacitiesMinimum requirements System requirementsDevice memory Operating system compatibilityEnvironmental specifications Print specificationsCopy specifications Scan specificationsElectrical specifications Regulatory information FCC statement Toxic and hazardous substance table LED indicator statement Regulatory model numberDeclaration of conformity Environmental product stewardship program Appendix D Index Symbols/NumericsPage OCR Page Twain 114
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