HP Officejet 7500A E910 User Manual

							Ragged, irregularly streaked, or faded bars
Example of Bad Color BarsThe top bar is irregularly streaked or fading.
Example of Bad Color BarsThe top black bar is ragged on one end.
If any of the bars are ragged, irregularly streaked, or faded, follow these steps:
1.Make sure the ink cartridges have ink.
2.Remove the cartridge corresponding to the streaked bar and make sure it is correctly
vented. For more information, see 
Replace the ink cartridges.
3.Reinstall the cartridge and make sure all the cartridges are correctly latched. For more
information, see 
Replace the ink cartridges
4.Clean the printhead. For more information, see 
Clean the printhead
5.Try another print or reprint the Print Quality Diagnostic report. If the problem still
occurs, but cleaning seems to have helped, clean again.
6.If cleaning does not solve the problem, replace the cartridge that corresponds to the
ragged bar.
7.If replacing the ink cartridge does not help, contact HP - the printhead may need to
be replaced.
Preventing the problem that causes ragged bars on the Print Quality Diagnostic
report:
• Avoid leaving opened ink cartridges outside of the printer for an extended period of
time.
• Wait until a new cartridge is ready to be installed before removing an old ink cartridge.
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							Regular white streaks in the bars
If any of the color bars show regular white streaks, follow these steps:
White streaksThe print quality bars have white streaks in them.
1.If the Print Quality Diagnostic report reads PHA TTOE = 0, align the printer. For more
information, see 
Align the printhead.
2.If PHA TTOE is not 0, or aligning does not help, clean the printhead. For more
information, see 
Clean the printhead.
3.Print another Print Quality Diagnostic report. If the streaking is still there, but seems
better, try another cleaning. If the streaking gets worse, contact HP - the printhead
may need to be replaced.
Bar colors are not uniform
Print quality bars are not uniformThe bars have lighter or darker portions in them.
If the color of any of the bars is not uniform, follow these steps:
1.If the printer was recently transported at a high altitude, try a printhead cleaning.
2.If the printer was not recently transported, try printing another Print Quality Diagnostic
report. This uses less ink than a printhead cleaning, but if it is not effective, try a
cleaning.
3.Retry the Print Quality Diagnostic report. If the colors seem to be improving, continue
cleaning. If the colors get worse, contact HP - the printhead may need to be replaced.
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							Large Black Font Text
Look at the large-font text above the color blocks. I ABCDEFG abcdefg The type should
be sharp and clear. If the type is jagged, try aligning the printer. If there are streaks or
smears of ink, clean the printhead.
Example of good Large-Font TypeThe letters are sharp and clear - the printer is operating
correctly.
Example of bad Large-Font TypeThe letters are jagged - align the printer.
Example of bad Large-Font TypeThe letters are smeared - clean the printhead and check if the
paper is curled. To avoid curl, store all paper flat in a
resealable bag.
Example of bad Large-Font TypeThe letters are ragged on one end - clean the printhead. If this
defect occurs right after a new black cartridge is installed, the
printers automatic servicing routines may solve the problem
in a day or so, using less ink than a printhead cleaning.
Alignment Patterns
If the color bars and large font text look OK, and the ink cartridges are not empty, look at
the alignment pattern directly above the color bars.
Example of a good alignment patternThe lines are straight.
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							Examples of a bad alignment patternThe lines are jagged - align the printer. If that does not
work, contact HP.
If you see no defects
If you do not see any defects on the print quality report, then the printing system is working
correctly. There is no reason to replace supplies or have the printer serviced, because
they are functioning correctly. If you still have a print quality problem, here are some other
things you can check:
• Check the paper.
• Check the print settings.
• Make sure your image has sufficient resolution.
• If the problem seems confined to a band near the edge of your printout, use the HP
software or another software application to rotate the image 180 degrees. The
problem might not appear on the other end of the print.
Advanced printhead maintenance
WARNING!Only reinstall the printhead as part of the procedure for Printhead
Problem error messages
To reinstall the printhead
1.Make sure that the printer is turned on.
2.Open the ink cartridge door.
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							3.Remove all of the ink cartridges and place them on a piece of paper with the ink
opening pointing up.
4.Lift the latch handle on the print carriage.
5.Remove the printhead by lifting it straight up.
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							6.Clean the printhead.
There are three areas of the printhead that need to be cleaned: the plastic ramps on
both sides of the ink nozzles, the edge between the nozzles and the electrical
contacts, and the electrical contacts.
1Plastic ramps on the sides of the nozzles
2Edge between nozzles and contacts
3Electrical contacts
CAUTION:Touch the nozzle and the electrical contact areas only with cleaning
materials and not with your finger.
To clean the printhead
a. Lightly dampen a clean, lint-free cloth and wipe the electrical contact area from
the bottom to the top. Do not go past the edge between the nozzles and the
electrical contacts. Clean until no new ink shows on the cloth.
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							b. Use a fresh, lightly dampened, lint-free cloth to wipe any accumulated ink and
debris from the edge between the nozzles and the contacts.
c. Use a fresh, lightly dampened, lint-free cloth to wipe the plastic ramps on both
sides of the nozzles. Wipe away from the nozzles.
d. Wipe the previously cleaned areas dry with a dry lint-free cloth before proceeding
to the next step.
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							7.Clean the electrical contacts inside the printer.
To clean the electrical contacts in the printer
a. Lightly dampen a clean, lint-free cloth with bottled or distilled water.
b. Clean the electrical contacts in the printer by wiping with the cloth from top to
bottom. Use as many fresh, clean cloths as necessary. Clean until no ink shows
on the cloth.
c. Wipe the area dry with a dry lint-free cloth before proceeding to the next step.
8.Make sure the latch handle is raised, and then reinsert the printhead.
9.Carefully lower the latch handle.
NOTE:Make sure you lower the latch handle before reinserting the ink
cartridges. Leaving the latch handle raised can result in incorrectly seated ink
cartridges and problems printing. The latch must remain down in order to correctly
install the ink cartridges.
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							10.Using the colored shaped icons for help, slide the ink cartridge into the empty slot
until it clicks into place and is seated firmly in the slot.
11.Close the ink cartridge door.
Advanced ink cartridge maintenance
This section contains the following topics:
•
Clean the sensor windows on the ink cartridges
Clean the sensor windows on the ink cartridges
If the problem is not resolved, printing can continue, but the ink system behavior might
change.
CAUTION:The cleaning procedure should take only a few minutes. Make sure that
the ink cartridges are reinstalled in the printer when instructed. Leaving them outside
of the printer for an extended period of time can result in damage to the ink cartridges.
To clean the sensor window on the ink cartridges
1.Gather swabs or a lint-free cloth to use for the cleaning procedure.
2.Make sure the printer is turned on.
3.Open the ink cartridge access door by lifting from the front right of the printer, until
the door locks into place.
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							The print carriage moves to the center of the printer.
NOTE:Wait until the print carriage stops moving before proceeding.
4.Remove all of the ink cartridges and place them on a piece of paper with the ink
openings pointing up.
To remove the ink cartridges
a. Press the tab on the ink cartridge to release it, and then remove it from the slot.
b. Place the ink cartridge on a sheet of paper with the ink opening pointing up.
c. Repeat steps a and b for each ink cartridge.
5.For each ink cartridge, wipe the sensor window with a dry swab or lint-free cloth.
The sensor window is an area of clear plastic near the copper or gold-colored metal
contacts on the bottom of the ink cartridge. Try not to touch the metal contacts.
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