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...

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...

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...

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...

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.
Print quality troubleshooting 121
 

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...

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.
Print quality troubleshooting 123
 

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...

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...

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...