HP T2500 Line discontinuities

Actions

1.Re-scan the original, setting the content type to Image, and contrast and background cleaning to zero.

2.If the problem persists, re-scan the original at a lower scanner resolution (Standard quality if scanning, Fast or Normal if copying). It may also help to flatten the original manually as much as possible before scanning it again.

NOTE: The problem of wrinkles cannot always be solved, due to the technological limitations of CIS technology. HP offers HD Scanners with CCD technology for higher quality requirements. If the wrinkles remain after the corrective actions explained above, then no further action can be taken to improve the image quality, except to buy a more expensive CCD scanner.

Line discontinuities

When scanning or copying large originals, you may sometimes find issues such as that shown in the following image, where a straight line (it does not necessarily have to be horizontal) appears with discontinuities or small steps. Please note the black arrow indicating the scanning direction in this example.

Actions

1.Repeat the scan, and this time make sure that the product is correctly positioned (it is flat on the floor and it does not move), and that the printer is not printing while you scan. Turning the original 90 or 180 degrees and scanning it again may also solve the problem.

2.If the problem persists, check that the original to be scanned is not skewed, and that it does not become skewed during the scan. If so, please refer to Incorrect paper advance, skew during scanning, or horizontal wrinkles on page 214. You might also want to deactivate the automatic de-skew algorithm as indicated in A copied or scanned image is very skewed on page 219.

3.If there is no skew but the problem persists, clean and calibrate the scanner as indicated in Scanner maintenance on page 156. Take care not to move the printer during the calibration (the printer should not be printing during scanner calibration), and check that the maintenance sheet is correctly positioned before starting the calibration. Also check that the maintenance sheet is not damaged before calibrating the scanner (an old or damaged maintenance sheet may cause this problem); if it is damaged, call HP support and ask for a new maintenance sheet.

4.If the problem persists, proceed to analyze the following areas of the diagnostic plot:

ENWW	Line discontinuities 203

Contents

Page Page Table of contents Page Page Page Page Page Page Page 1 Introduction Safety precautions HP Start-UpKit Using this guide Printer models The printer’s main features The printer’s main components Page The front panel Left and right fixed icons Home screen dynamic icons Information screen dynamic icons Printer software Web Services Print from virtually anywhere Save your files online in the cloud Collaborate with ease Turn the printer on and off The printer’s internal prints Page 2 Installing the software Connect the printer to your network Connect a computer to the printer by network (Windows) Uninstall the printer software (Windows) Connect a computer to the printer by network (Mac OS X) Bonjour My printer is not in the list Click Continue 4.Open the Mac OS X HP Designjet Installer Uninstall the printer software (Mac OS X) 3 Setting up the printer Set up your Web-connectedprinter Web Services manual configuration Set remote printing preferences Configure a scan-to-networkor scan-to-FTPfolder Protocol Folder type Alias name Server name Folder name Add Modify Properties Sharing Advanced Sharing Public System Preferences Read & Write Options Share files and folder using SMB Paper suitability options Turn nesting on and off Turn usage information on and off Turn e-mailnotifications on and off Turn alerts on and off Control access to the printer Require account ID Set Windows driver preferences 4 Network configuration Verify correct operation Preconfigure network settings if required Add the printer to your network system Troubleshooting Reset network parameters Control network protocols Front-panelmenu items Page Page Embedded services Supported network protocols 5 Personalizing the printer Change the language of the front-paneldisplay Access the HP Utility Access the Embedded Web Server Change the language of the HP Utility Change the language of the Embedded Web Server Change the sleep mode setting Change the auto-offsetting Change the loudspeaker volume Change the front-paneldisplay brightness Change the units of measurement Configure network settings Change the graphic language setting Manage printer security Change your printer’s email address 6 Paper handling Load a roll onto the spindle Page Page Load a roll into the printer Page Page Unload a roll Load a single sheet The stacker Page Page The basket View information about the paper Paper presets Printing paper info Move the paper Maintain paper Change the drying time Change the retrieval time Turn the automatic cutter on and off Feed and cut the paper Page 7 Working with two rolls The uses of a multiroll printer How the printer allocates jobs to paper rolls ◦Roll switching policy: doesn't matter 8 Printing Print from a USB flash drive Print from a computer using the Embedded Web Server or HP Utility Print from a computer using a printer driver Advanced print settings Economode Maximum Detail More Passes Custom options In the Mac OS X Print dialog: Custom paper sizes Use the Mac OS X printer driver 2.Select Paper Size > Manage Custom Sizes Use the Embedded Web Server 2.Select Advanced settings > Paper > Page size > Custom ●In the Mac OS X Print dialog: select the Margins/Layout panel Any Layout/Output Print document on Merge Show preview before printing Basic settings Hold for preview If you have a high-resolutionimage If you have printhead problems In the Mac OS X Page Setup dialog: Margins/Layout Borderless Automatically by printer Manually in application In the Mac OS X Print dialog In the Mac OS X PostScript Print dialog (PostScript printers): When does the printer try to nest pages What pages can be nested Which pages qualify for nesting How long does the printer wait for another file Paper options > Roll protection Put job on hold Print from iOS with AirPrint Help 9 Scanning Paper types suitable for scanning Scan to file Page Disable USB drives Format Compression Resolution Content type Scan preferences > De-skew > Off 10 Copying Copy color Job output then Copy preferences 11 Web-connectedprinting Enable Cloud printing for your printer Print through the Cloud with HP Designjet ePrint & Share Print by email Print from a smartphone or tablet Add a printer View and print from the HP Designjet ePrint & Share website Print from HP Designjet ePrint & Share using the printer’s front panel 2.Press the HP ePrint & Share icon Scan to an email address Page .pdf Next Scan again View and print from other content repositories Create your Online Print History Share files in your Online Print History HP Designjet ePrint & Share security Page 12 Job queue management The job queue in the front panel Force print Pause save to Delete printing The job queue in the Embedded Web Server or HP Utility Loaded paper: Job dimensions: Printer settings Start printing Rotate Receiving Waiting to process Processing Preparing to print Reactivate a job on hold 13 Color management How colors are represented A summary of the color management process Color calibration Color management from printer drivers Application-Managed Colors Printer-Managed Non-PostScript (PCL3GUI Printing in color Printing in grayscale Color management from printer drivers (PostScript printers) CMYK color emulation RGB color emulation Color management from the Embedded Web Server Rendering intent Perform black point compensation Color management from the front panel Color management and the scanner 14 Practical printing examples Print from Adobe Acrobat Document Size Print Quality Autorotate Print from Autodesk AutoCAD Page Page Print from Adobe Photoshop Save Print and scale from Microsoft Office Fit to Page Close Page Layout Paper Type Page 15 Retrieving printer usage information Get printer accounting information Check usage statistics Check usage statistics for a job Request accounting data by email Page 16 Handling ink cartridges and printhead About the ink cartridges Check the ink cartridges status Remove an ink cartridge Insert an ink cartridge Page Safe mode About the printhead Check the printhead status Remove the printhead Page Page Insert the printhead Page Storage of anonymous usage information 17 Printer maintenance Check printer status Clean the exterior of the printer Maintain the ink cartridges Move or store the printer Update the firmware Update the software Printer maintenance kits Secure File Erase Disk Wipe 18 Scanner maintenance Clean the scanner’s glass plate Page Page Replace the scanner’s glass plate Page Page Page Page Calibrate the scanner 19 Supplies and accessories How to order supplies and accessories Page Page Introduction to the accessories Page 20 Troubleshooting paper issues The paper cannot be loaded successfully The paper type is not in the list The printer printed on the wrong paper type An “on hold for paper” message The paper has jammed in the print platen Page Page Page The paper has jammed in the stacker The printer reports unexpectedly that the stacker is full The printer displays out of paper when paper is available Prints do not fall neatly into the basket The print remains in the printer after printing has completed The cutter does not cut well 21 Troubleshooting print-qualityissues Page Print-qualitytroubleshooting wizard Recalibrate the paper advance OK: Image Horizontal lines across the image (banding) Lines are too thick, too thin or missing Lines appear stepped or jagged Lines print double or in the wrong colors Lines are discontinuous Lines are blurred Line lengths are inaccurate The whole image is blurry or grainy The paper is not flat The print is scuffed or scratched Ink marks on the paper Black ink comes off when you touch the print Edges of objects are stepped or not sharp Edges of objects are darker than expected Horizontal lines at the end of a cut sheet print Vertical bands of different colors White spots on the print Colors are inaccurate Colors are fading The image is incomplete (clipped at the bottom) The image is clipped Some objects are missing from the printed image A PDF file is clipped or objects are missing The Image Diagnostics Print Print diagnostic image If you still have a problem Page 22 Troubleshooting scanner issues Cannot access the network folder Scanning to file is slow 23 Troubleshooting scan-qualityissues Random vertical lines Wrinkles or folds Line discontinuities Grain in area fills when scanning plain paper Small color differences between adjacent CIS modules Vertical light lines at the intersection between CIS modules Variable line thickness or missing lines Inaccurately reproduced colors Color fringing Clipping in dark or light areas Page Flare in the image when scanning glossy originals Vertical red and green bands over white or black background The stop-starteffect Vibration Horizontal periodical banding Defocus, blurring and fading colors Mixed Incorrect paper advance, skew during scanning, or horizontal wrinkles Vertical black band 20 cm wide The scanner damages some originals Completely wrong colors Vertical distortion Object replication (ghosting) Clipping or incorrect scale factor when down-scalingin copies and prints Incorrect edge detection, mostly when scanning tracing paper A copied or scanned image is very skewed 24 The scanner diagnostic plot Prepare the printer and the paper to print the diagnostic sheet Visual check for errors while printing the diagnostic sheet Page panel by pressing , then , then Image Quality Maintenance > Color calibration Image Quality Maintenance > Clean printheads Scan or copy the diagnostic plot Monitor calibration Save the diagnostic plot for future use 25Troubleshooting ink cartridge and printhead issues Cannot insert an ink cartridge Ink cartridge status messages Cannot insert the printhead The front-paneldisplay recommends reseating or replacing the printhead Clean the printhead Align the printhead Printhead status messages 26 Troubleshooting general printer issues The printer will not start The printer does not print The printer seems slow The printer behaves strangely Communication failures between computer and printer Cannot access the HP Utility Cannot access the Embedded Web Server Cannot connect to the Internet Web Services issues Automatic file system check Alerts Errors: Embedded Web Server: Alert settings 27 Front-panelerror messages Page The system error log 28 HP Customer Care HP Professional Services HP Proactive Support Customer Self Repair Contact HP Support 29 Printer specifications Functional specifications Physical specifications Memory specifications Power specifications Environmental specifications Acoustic specifications Glossary Firmware Gamut Gigabit Ethernet Hi-SpeedUSB HP RTL Platen Printer driver Printhead Spindle TCP/IP Index