Text or graphics are streaked, Printhead maintenance – HP Officejet Pro 8500A User Manual

Page 103

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Text or graphics are streaked

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.

Something on the page is missing or incorrect

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 margin settings

Make sure the margin settings for the document do not exceed the printable area of
the printer. For more information, see Set minimum margins.

Check the color print settings

Make sure Print in Grayscale is not selected in the printer 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, see To 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 Printhead maintenance.

3. Clean the printheads. For more information, see To clean the printheads.

4. Replace the printheads if the problems persist after cleaning. For more

information, see Solve wireless problems.

This section covers the following printhead maintenance tasks:

To check printhead health

To print the print quality diagnostic page

To align the printheads

To calibrate the linefeed

To clean the printheads

To clean the printhead contacts manually

To replace the printheads

Solve print quality problems

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