HP OfficeJet Pro L7400 User Manual

							NOTE:The ink levels shown are an estimate only. Actual ink volumes may vary.
After removing a cartridge from its package, install it right away. Do not remove a
cartridge from the device for long periods of time.
To find out which ink cartridges work with your device, see 
Supplies.
To replace the ink cartridges
1.Gently pull open the ink cartridge cover.
2.Remove the ink cartridge that requires replacement by grasping it between your
thumb and forefinger and pulling it firmly toward you.
3.Remove the new ink cartridge from its package.
4.Align the cartridge with its color-coded slot and insert the cartridge into the slot.
Press down firmly on the cartridge to ensure proper contact.
5.Close the ink cartridge cover.
Maintain the printheads
If printed characters are incomplete, or dots or lines are missing from printouts, ink
nozzles might be clogged and you might need to clean the printheads.
Maintain the printheads57
 
						

							When the quality of printouts deteriorates, complete the relevant steps based on the
following sequence:
1.Check the health of the printheads. For more information, see 
Check printhead
health.
2.Print the print quality diagnostic page on a clean sheet of white paper. Evaluate
any problem areas, and perform the recommended actions. For more information,
see 
Print the print quality diagnostic page.
3.Manually clean the printhead contacts. For more information, see 
Clean the
printheads.
4.Replace the printheads if the problems persist after cleaning. For more
information, see 
Replace the printheads.
CAUTION:HP is not responsible for damage to the device that results from
modifying the printheads.
Check printhead health
Use one of the following means to check the printhead health. If the status of any
printhead is not good or fair, then perform one or more of the maintenance functions,
or clean or replace the printhead.
•Self-Test Diagnostic page: Print the self-test diagnostic page on a clean sheet of
white paper, and check the printhead health section. For more information, see
Understand the self-test diagnostic page.
•Toolbox (Windows): Open the Toolbox. For more information, see 
Open the
Toolbox. Click the Information tab, and then click Printhead Health.
•HP Printer Utility (Mac OS): Open the HP Printer Utility. For more information,
see 
Open the HP Printer Utility. Select Supply Status tab, and then click Printhead.
Print the print quality diagnostic page
Use the print quality diagnostic page to diagnose issues affecting the print quality. This
will help you decide whether to run any maintenance tools to improve the print quality
of your printouts. You can also view the ink level information, and the printhead health
status on the page.
•Control panel: Press the Setup button, select Print Report, select Print Quality
Page, and then press OK.
•Toolbox (Windows): Click the Services tab, and then click Print PQ (print
quality) diagnostic page and follow the onscreen instructions.
•HP Printer Utility (Mac OS): Click Print Quality Diagnostics from the
Information and Support panel.
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							1Printer Information: Shows device information (such as the product model number, serial
number, and firmware version number), the number of pages printed from the tray, the ink
level information, and the printhead health status.
2Test Pattern 1: If the lines are not straight and connected, align the printheads. For more
information, see Align the printheads.
3Test Pattern 2: If there are thin white lines across any of the colored blocks, clean the
printheads. For more information, see Clean the printheads.
4Test Pattern 3: If there are dark lines or white gaps where the arrows are pointing,
calibrate the linefeed. For more information, see Calibrate the linefeed.
Align the printheads
Whenever you replace a printhead, the device automatically aligns the printheads to
ensure the best print quality. However, if the appearance of your printed pages
indicates that the printheads are misaligned, you can start the alignment process
manually.
•Control panel: Press the Setup button, select Tools, select Align Printer, and
then press OK. Press OK when the alignment is done to continue.
•Toolbox (Windows): Click the Services tab, and then click Align Printheads and
follow the onscreen instructions.
•HP Printer Utility (Mac OS): Click Align from the Information and Support panel.
Maintain the printheads59
 
						

							Calibrate the linefeed
•Control panel: Press the Setup button, select Tools, select Calibrate Linefeed,
and then press OK.
•Toolbox (Windows): Click the Services tab, and then click Calibrate Linefeed
and follow the onscreen instructions.
•HP Printer Utility (Mac OS): Click Calibrate Linefeed from the Information and
Support panel.
Clean the printheads
NOTE:Cleaning uses ink, so clean the printheads only when necessary.
The cleaning process takes up to 3.5 minutes. Some noise might be generated in
the process.
•Control panel: Press the Setup button, select Tools, and then select Clean
Printhead.
•Toolbox (Windows): Click the Services tab, and then click Clean Printheads
and follow the onscreen instructions.
•HP Printer Utility (Mac OS): Click Clean from the Information and Support panel.
Clean the printhead contacts manually
After the printheads are installed, you might get a control panel message telling you
the device will not print. If you receive this message, you might need to clean the
electrical contacts on the printheads and in the device.
CAUTION:Clean the electrical contacts only after you have attempted to clean
the printheads. Electrical contacts contain sensitive electronic components that can
be damaged easily. For more information, see 
Clean the printheads.
To clean the printhead contacts manually
1.Open the top cover.
2.If the carriage does not move to the left automatically, press and hold the OK
button for five seconds. Wait for the carriage to stop moving, and then unplug the
power cord from the printer.
3.Lift the printhead latch.
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							4.Lift the handle of the printhead (which corresponds to the control panel message)
and use it to pull the printhead out of its slot.
5.Obtain clean, dry, soft and lint-free cleaning material. Suitable materials include
paper coffee filters and eyeglass lens cleaning paper.
CAUTION:Do not use water.
6.Wipe the electrical contacts on the printhead but do not touch the nozzles.
NOTE:The electrical contacts are small copper-color squares, grouped on
one face of the printhead.
The nozzles are on a different face of the printhead. Ink will be visible on the
nozzles.
Maintain the printheads61
 
						

							CAUTION:Touching the nozzles can cause permanent nozzle damage. Also,
ink can permanently mark clothing.
7.After cleaning, place the printhead on a sheet of paper or paper towel. Make sure
the nozzles are facing up and are not in contact with the paper.
8.Clean the electrical contacts in the printhead slot inside the device with a clean,
dry, soft and lint-free cloth.
9.Plug in the power cord and turn on the device. The control panel should indicate
that the printhead is missing.
10.Insert the printhead into its color-coded slot (the label on the printhead must match
the label on the printhead latch). Press down firmly on the printhead to ensure
proper contact.
11.Pull the printhead latch all the way forward, and then press down to ensure that
the latch is properly engaged. You might have to apply some pressure to engage
the latch.
12.Where necessary, repeat the above steps for the remaining printhead.
13.Close the top cover.
14.If the control panel message remains, repeat the cleaning procedure described
above for the printhead which corresponds to the message.
15.If the control panel message remains, replace the printhead which corresponds to
the message.
16.Wait while the device initializes the printheads and prints the alignment pages. If
the device does not print the pages, start the alignment process manually. For
more information, see 
Align the printheads.
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							Replace the printheads
NOTE:To find out which printheads work with your printer, see Supplies.
To replace the printheads
1.Open the top cover.
2.If the carriage does not move to the left automatically, press and hold the OK
button for 5 seconds. Wait for the carriage to stop moving.
3.Lift the printhead latch.
4.Lift the handle of a printhead and use it to pull the printhead out of its slot.
Maintain the printheads63
 
						

							5.Before installing a printhead, shake the printhead up and down at least six times
while the printhead is still in its packaging.
6.Remove the new printhead from its package, and then remove its orange
protective caps.
CAUTION:Do not shake printheads after the caps are removed.
7.Insert the printhead into its color-coded slot (the label on the printhead must match
the label on the printhead latch). Press down firmly on the printhead to ensure
proper contact.
8.Pull the printhead latch all the way forward, and then press down to ensure that
the latch is properly engaged. You might have to apply some pressure to engage
the latch.
9.Close the top cover.
10.Wait while the device initializes the printheads and prints the alignment pages. If
the device does not print the pages, start the alignment process manually. For
more information, see 
Align the printheads.
Store printing supplies
This section covers the following topics:
•
Store ink cartridges
•
Store printheads
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							Store ink cartridges
Ink cartridges can be left in the device for extended periods of time. If you remove the
ink cartridges, place them in an airtight container, such as a resealable plastic bag.
Store printheads
Printheads can be left in the device for extended periods of time. If you remove the
printheads, place them in an airtight container, such as a resealable plastic bag.
Clean the device
This section provides instructions for keeping the device in top working condition.
Perform these maintenance procedures as necessary.
Dust or dirt on the scanner glass, scanner lid backing, or scanner frame can slow
down performance, degrade the quality of scans, and affect the accuracy of special
features such as fitting copies to a certain page size.
Clean the scanner glass
To clean the scanner glass
1.Turn off the device.
2.Lift the scanner lid.
3.Clean the glass by using a soft, lint-free cloth that has been sprayed with a mild
glass cleaner. Dry the glass with a dry, soft, lint-free cloth.
CAUTION:Use only glass cleaner to clean the scanner glass. Avoid cleaners
that contain abrasives, acetone, benzene, and carbon tetrachloride, all of which
can damage the scanner glass. Avoid isopropyl alcohol because it can leave
streaks on the glass.
CAUTION:Do not spray the glass cleaner directly on the glass. If too much
glass cleaner is applied, the cleaner could leak under the glass and damage
the scanner.
4.Close the scanner lid, and turn on the device.
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							Clean the exterior
NOTE:Before cleaning the device, turn off the power and unplug the power cord
from the electrical socket.
Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off of the case. The
exterior of the device does not require cleaning. Keep fluids away from the interior of
the device, as well as from the control panel.
Troubleshooting tips and resources
Use the following tips and resources to resolve printing problems.
• For a paper jam, see 
Clear a jam in the device.
• For paper-feed problems, such as the paper skew and paper pick, see 
Solve
paper-feed problems.
• Verify that:
• The Power light is on and not blinking. When the device is turned on for the
first time, it takes approximately 12 minutes to initialize it after the printheads
are installed.
• No error messages appear on the computer screen.
• The power cord and other cables are working, and are firmly connected to the
device. Make sure the device is connected firmly to a functioning alternating
current (AC) power outlet, and is turned on. For voltage requirements, see
Electrical specifications.
• Media is loaded correctly in the tray and is not jammed in the device.
• Printheads and ink cartridges are properly installed in their correct color-coded
slots. Press down firmly on each one to ensure proper contact. Ensure you
have removed the orange protective caps from each printhead.
• Printhead latch and all covers are closed.
• The rear access panel or optional duplexer is locked into place.
• All packing tapes and materials are removed.
• The device can print a self-test diagnostic page. For more information, see
Understand the self-test diagnostic page.
• The device is set as the current or default printer. For Windows, set it as the
default in the Printers folder. For the Mac OS, set it as the default in the Printer
Setup Utility. See your computers documentation for more information.
•Pause Printing is not selected if you are using a computer running Windows.
• You are not running too many programs when you are performing a task.
Close programs that you are not using or restart the computer before
attempting the task again.
Solve printing problems
•The device shuts down unexpectedly
•
Error message appears on control-panel display
•
The device is not responding (nothing prints)
•
Device does not accept printhead
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