HP OfficeJet Pro L7400 User Manual

							Copy defects are apparent
•
Vertical white or faded stripes
The media might not meet Hewlett-Packard media specifications (for example, the
media is too moist or too rough). See 
Select print media for more information.
•
Too light or dark
Try adjusting the contrast and copy-quality settings.
•
Unwanted lines
The scanner glass, lid backing, or frame might need cleaning. See 
Clean the
device for more information.
•
Black dots or streaks
Ink, glue, correction fluid, or an unwanted substance might be on the scanner
glass or lid backing. Try cleaning the device. See 
Clean the device for more
information.
•
Unclear text
• Try adjusting the contrast and copy-quality settings.
• The default enhancement setting might not be suitable for the job. Check the
setting and change it to enhance text or photographs, if needed. For more
information, see 
Change the copy settings.
•
Incompletely filled text or graphics
Try adjusting the contrast and copy-quality settings.
•
Large, black typefaces look splotchy (not smooth)
The default enhancement setting might not be suitable for the job. Check the
setting and change it to enhance text or photographs, if needed. For more
information, see 
Change the copy settings.
•
Horizontal grainy or white bands in light-gray to medium-gray areas
The default enhancement setting might not be suitable for the job. Check the
setting and change it to enhance text or photographs, if needed. For more
information, see 
Change the copy settings.
The device prints half a page, then ejects the paper
Check the ink cartridges
The ink cartridges may have run out of ink, and the print job was cancelled. Replace
the ink cartridges, and then resend the print job to the device. For more information,
see 
Replace the ink cartridges.
Solve scan problems
If the following topics do not help, see Support and warranty for information about HP
support.
NOTE:If you are starting the scan from a computer, see the software Help for
troubleshooting information.
Solve scan problems77
 
						

							Scanner did nothing
•Check the original
Make sure that the original is placed on the scanner glass correctly. For more
information, see 
Load an original on the scanner glass.
•Check the device
The device might be coming out of PowerSave mode after a period of inactivity,
which delays processing a short while. Wait until the device reaches the READY
state.
Scan takes too long
•Check the settings
• If you set the resolution too high, the scan job takes longer and results in larger
files. To obtain good results when scanning or copying, do not use a resolution
that is higher than needed. You can lower the resolution to scan more quickly.
• If you acquire an image through TWAIN, you can change the settings so that
the original scans in black and white. See the onscreen Help for the TWAIN
program for information.
•Check the status of the device
If you sent a print or copy job before you tried to scan, the scan starts if the
scanner is not busy. However, the printing and scanning processes share memory,
which means that the scan might be slower.
Part of the document did not scan or text is missing
•Check the original
• Make sure that you loaded the original correctly. For more information, see
Load originals.
• Colored backgrounds can cause images in the foreground to blend into the
background. Try adjusting the settings before you scan the original, or try
enhancing the image after you scan the original.
•Check the settings
• Make sure that the input media size is large enough for the original that you
are scanning.
• If you are using the HP photo and imaging software, the default settings in the
HP photo and imaging software might be set to automatically perform a
specific task other than the one that you are attempting. See the onscreen
Help for the HP photo and imaging software for instructions about changing the
properties.
Chapter 8
78 Maintain and troubleshoot
 
						

							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 problems79
 
						

							Text or images on the back of a two-sided original appear in the scan
Two-sided originals can bleed text or images from the back side to the scan if the
originals are printed on media that is too thin or too transparent.
The scanned image is skewed (crooked)
The original might have been placed incorrectly. Be sure to use the media guides
when you place the original on the scanner glass. For more information, see 
Load
originals.
The image quality is better when printed
The image that appears on the screen is not always an accurate representation of the
quality of the scan.
• Try adjusting your computer monitor settings to use more colors (or levels of gray).
On Windows computers, you typically make this adjustment by opening Display
on the Windows control panel.
• Try adjusting the resolution and color settings.
The scanned image shows blots, lines, vertical white stripes, or other defects
• If the scanner glass is dirty, the image produced does not have optimum clarity.
See 
Clean the device for cleaning instructions.
• The defects might be on the original and not a result of the scanning process.
Graphics look different from the original
The graphics settings might not be suitable for the type of scan job that you are
performing. Try changing the graphics settings.
Take steps to improve the scan quality
• Use high-quality originals.
• Place the media correctly. If the media is placed incorrectly on the scanner glass, it
might skew, which causes unclear images. For more information, see 
Load originals.
• Adjust the software settings according to how you plan to use the scanned page.
• Use or make a carrier sheet to protect your originals.
• Clean the scanner glass. See 
Clean the scanner glass for more information.
Scan defects are apparent
•
Blank pages
Make sure that the original document is placed correctly. Place the original
document face down on the flatbed scanner with the top-left corner of the
document located in the lower-right corner of the scanner glass.
•
Too light or dark
• Try adjusting the settings. Be sure to use the correct resolution and color
settings.
• The original image might be very light or dark or might be printed on colored
paper.
•
Unwanted lines
Ink, glue, correction fluid, or an unwanted substance might be on the scanner
glass. Try cleaning the scanner glass. See 
Clean the device for more information.
Chapter 8
80 Maintain and troubleshoot
 
						

							•
Black dots or streaks
• Ink, glue, correction fluid, or an unwanted substance might be on the scanner
glass, the scanner glass might be dirty or scratched, or the lid backing might be
dirty. Try cleaning the scanner glass and lid backing. See 
Clean the device for
more information. If cleaning does not correct the problem, the scanner glass
or lid backing might need to be replaced.
• The defects might be on the original and not a result of the scanning process.
•
Unclear text
Try adjusting the settings. Make sure that the resolution and color settings are
correct.
•
Size is reduced
The HP software settings might be set to reduce the scanned image. See the
product software Help for more information about changing the settings.
Troubleshoot installation issues
If the following topics do not help, see Support and warranty for information about HP
support.
•
Hardware installation suggestions
•
Software installation suggestions
Hardware installation suggestions
Check the device
• Make sure that all packing tape and material have been removed from outside and
inside the device.
• Make sure that the device is loaded with paper.
• Make sure that no lights are on or blinking except the Ready light, which should be
on. If the Attention light is blinking, check for messages on the control panel.
• Make sure that the device can print a self-test diagnostic page.
Check the hardware connections
• Make sure that any cords and cables that you are using are in good working order.
• Make sure that the power cord is connected securely to both the device and to a
working power outlet.
Check the printheads and ink cartridges
• Make sure that you have removed the orange caps from the printheads.
• Make sure that all of the printheads and ink cartridges are firmly installed in their
correct, colorcoded slot. Press down firmly on each one to ensure proper contact.
The device cannot work if they are not all installed.
• Make sure that the printhead latch is closed properly.
• If the display shows a printhead error message, clean the contacts on the
printheads.
Troubleshoot installation issues81
 
						

							Check the computer system
• Make sure that your computer is running one of the supported operating systems.
• Make sure that the computer meets at least the minimum system requirements.
Check the device to ensure the following
• Power light is on and not blinking. When the device is first turned on, it takes
approximately 45 seconds to warm up.
• The device is in the Ready state, and no other lights on the control panel are lit or
blinking. If lights are lit or blinking, see the message on the control panel.
• Ensure power cord and other cables are working, and are firmly connected to the
device.
• All packing tapes and materials are removed from the device.
• Rear access panel or duplexer is locked into place.
• Paper is loaded correctly in the tray, and is not jammed in the device.
• Ensure the orange protective caps have been removed from each printhead.
• Printheads and ink cartridges are properly installed in their correct color-coded
slots. Press down firmly on each one to ensure proper contact.
• Printhead latch and all covers are closed.
Software installation suggestions
Verify installation preliminaries
• Make sure to use the Starter CD that contains the correct installation software for
your operating system.
• Before installing software, make sure that all other programs are closed.
• If the computer does not recognize the path to the CD-ROM drive that you type,
make sure that you are specifying the correct drive letter.
• If the computer cannot recognize the Starter CD in the CD-ROM drive, inspect the
Starter CD for damage. You can download the device driver from the HP Web site
(
www.hp.com/support).
Check or perform the following
• Make sure the computer meets the system requirements.
• Before installing software on a Windows computer, ensure all other programs are
closed.
• If the computer does not recognize the path to the CD drive that you typed, ensure
you are specifying the correct drive letter.
• If the computer cannot recognize the Starter CD in the CD drive, inspect the CD for
damage. You can download the device driver from the HP Web site (
www.hp.com/
support).
Chapter 8
82 Maintain and troubleshoot
 
						

							• In the Windows device manager, make sure that the USB drivers have not been
disabled.
• If you are using a computer running Windows, and the computer cannot detect the
device, run the uninstallation utility (util\ccc\uninstall.bat on the Starter CD) to
perform a clean uninstallation of the device driver. Restart your computer, and
reinstall the device driver.
Clear jams
Occasionally, media becomes jammed during a job. Try the following remedies before
you attempt to clear the jam.
• Make sure that you are printing with media that meets specifications. For more
information, see 
Select print media.
• Make sure that you are printing with media that is not wrinkled, folded, or damaged.
• Make sure that the device is clean. For more information, see 
Clean the device.
• Make sure that the trays are loaded correctly and are not too full. For more
information, see 
Load media.
Clear a jam in the device
To clear a jam
1.Remove all media from the output tray.
2.Check the rear access panel or the duplexer.
a. Push the button on either side of the rear access panel or the duplexer, and
then remove the panel or unit.
b. Locate any jammed media inside the device, grasp it with both hands and then
pull it toward you.
Clear jams83
 
						

							c. If the jam is not there, push the latch on the top of the duplexer and lower its
cover. If the jam is inside, carefully remove it. Close the cover.
d. Reinsert the rear access panel or the duplexer into the device.
3.If you cannot locate the jam, lift the output tray and check for a jam in Tray 1. If
media is jammed in the tray, do the following:
a. Raise the output tray.
b. Pull the paper toward you.
c. Lower the output tray.
4.Open the print carriage access door. If there is paper remaining inside the device,
ensure the carriage has moved to the right of the device, free any paper scraps or
wrinkled media, and pull the media towards you through the top of the device.
WARNING!Do not reach into the device when it is on and the carriage is
stuck. When you open the print carriage access door, the carriage should
return to its position on the right side of the device. If it does not move to the
right, turn off the device before you remove any jam.
5.After clearing the jam, close all covers, turn on the device (if you turned it off) and
resend the print job.
Chapter 8
84 Maintain and troubleshoot
 
						

							Tips for avoiding jams
• Make sure that nothing is blocking the paper path.
• Do not overload the trays. For more information, see 
Understand specifications for
supported media.
• Load paper properly and when the device is not printing. For more information, see
Load media.
• When reinserting Tray 2 (optional) into the device, do so gently. Forceful insertion
with a full stack of paper may cause sheets to slide up within the device, causing it
to jam or pick multiple sheets at one time.
• Do not use media that is curled or crumpled.
• Always use media that conforms with specifications. For more information, see
Select print media.
• Make sure the output tray is not overly full.
• Make sure media is aligned against the right side of a tray.
• Make sure the media length and width guides are adjusted snugly against the
media, but do not crinkle or bend it.
Clear jams85
 
						

							A
HP supplies and accessories
This section provides information on HP supplies and accessories for the device. The information
is subject to changes, visit the HP Web site (www.hpshopping.com) for the latest updates. You
may also make purchases through the Web site.
•
Order printing supplies online
•
Accessories
•
Supplies
Order printing supplies online
Besides the HP Web site, you may order printing supplies using the following tools:
•Toolbox (Windows): On the Estimated Ink Level tab, click Shop Online.
•HP Printer Utility (Mac OS): Click Supplies Status from the Information and Support
panel, click the Shop for HP Supplies drop-down menu, and then choose Online.
Accessories
HP automatic two-sided
printing accessoryC9278AAuto-duplexer allowing printing on
both sides of a sheet of paper
automatically
350-sheet input trayCB007AOptional second tray for up to 350
pages of plain paper
HP Jetdirect 175x Print
Server-Fast Ethernet*J6035CExternal print server (USB 1.0)
HP Jetdirect en3700 Fast
Ethernet Print Server*J7942AExternal print server (USB 2.0)
HP Jetdirect ew2400 802.11g
Wireless Print Server*J7951AWireless or wired external print server
*Only supports print functionality.
Supplies
•Ink cartridges
•
Printheads
•
HP media
Ink cartridges
Use only the replacement cartridges that have the same cartridge number as the ink cartridge
you are replacing. You can find the cartridge number in the following places:
• On the self-test diagnostic page. For more information, see 
Understand the self-testdiagnostic page.
• On the label of the ink cartridge you are replacing.
•Toolbox (Windows): Click the Estimated Ink Level tab, and then click the Cartridge
Details button to view information about replacement ink cartridges.
•HP Printer Utility (Mac OS): Open the Information and Support panel, and then click
Supply Info.
86 HP supplies and accessories