HP Officejet Pro 8000 Enterprise User Manual

Check the type of media loaded in the printer
• Make sure the tray supports the type of  media you have loaded. For more
information, see 
Media specifications.
• Make sure you have selected the tray in the print driver that contains the media that you want to use.
Check the printer location and length of USB cable
It is recommended that you use a USB cable that is less than 3 meters (9.8 feet) long
to minimize the effects of these electromagnetic fields. You can also try to use
a different USB cable to...

Check the media type
• Some types of media do not accept ink well. For these types of media, ink driesmore slowly and smearing may occur. For more information, see 
Media
specifications.
• Make sure that the media in the tray matches the media type selected in the printer driver.
Ink is not filling the text or  graphics completely
Check the media type
Some media types are not suitable for use with the printer. For more information, see
Media specifications.
Check the printheads
Print the print quality...

Check the printheads
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
Printhead maintenance.
Check the print cartridges.
HP cannot guarantee the quality of refilled, remanufactured, or non-HP ink cartridges.
Printout shows bleeding colors
Check the ink cartridges
Make sure you are using genuine HP ink. HP cannot guarantee the quality of refilled,
remanufactured, or non-HP ink cartridges....

Check the margin settings
Make sure the margin settings for the document do not exceed the printable area of the
printer.
Check the color print settings
Make sure Print in Grayscale  is not selected in the print driver.
Printhead maintenance
If printed characters are incomplete, or printouts are streaked, the ink nozzles might be
clogged and you might need to clean the printheads.
When the quality of printouts deteriorates, follow these steps:
1.Check the health of the printheads. For more information,...

your printouts. You can also view the ink level information, and the printhead health
status on the page.
NOTE: Before printing the print quality diagnostic page, make sure you load
paper. For more information, see 
Load media.
Ink level warnings and indicators provide estimates for planning purposes only.
When you receive a low-ink warning message, consider having a replacement
cartridge available to avoid  possible printing delays. You do not need to replace
cartridges until prompted to do so.
•...

1Printer Information:  Shows printer information (such as the printer model number, serial
number, and firmware version number), the number of pages printed from the trays and
duplexer, the ink level information, and the printhead health status.
NOTE: Ink level warnings and indicators provide estimates for planning purposes only.
When you receive a low-ink warning message, consider having a replacement cartridge
available to avoid possible printing delays. You do not need to replace cartridges until...

•HP Software (Windows):  Open the HP software that was included with the printer.
Click the  Device Services  tab, and then click  Linefeed Calibration  and follow the
onscreen instructions.
• HP Utility (Mac OS X):  Click Calibrate Linefeed  from the Information and
Support  panel.
To clean the printheads
To determine whether the printheads need to be cleaned, print a Print Quality
Diagnostic page. For more information, see 
Understand the Configuration Page.
NOTE: Cleaning uses ink, so clean the...

3.Lift the printhead latch.
4.Lift the handle of the printhead 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.
Chapter 4
44 Solve a problem
 

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 th e printhead. Ink is visible on the
nozzles.
CAUTION: Touching the nozzles can cause permanent nozzle damage.
CAUTION: 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...

12.Pull the printhead latch all the way forward, and then press down to ensure that the
latch is engaged correctly. You might have to apply some pressure to engage the
latch.
13. Close the top cover.
14. If the control-panel message remains, repeat the cleaning procedure for the
printhead that corresponds to the message.
15. If the control-panel message remains, replace the printhead which corresponds to
the message.
16. Wait while the printer initializes the printheads and prints the alignment pages....