HP color laserjet 2550 series Manuale Di Servizio

If an image that appears at the top of the page (in solid black) repeats farther down the page
(in a gray field), the toner might not have been completely erased from the last print job. The
repeated image might be lighter or darker than the field in which it appears.

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Clean the printer. Open the HP LaserJet Toolbox to use the cleaning page. See 

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In your program, change the tone (darkness) of the field in which the repeated image
appears.

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In your program, rotate the whole page 180 degrees to print the lighter image first.

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Change the order in which the images are printed. For example, have the lighter image
at the top of the page, and the darker image farther down the page.

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If the defect occurs later in a print job, turn the printer off for 10 minutes, and then turn
the printer on to restart the print job.

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Replace the imaging drum.

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Replace the fuser.

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If the problem is not resolved, see 

.

If the problem is not resolved, try these steps:

1. Perform a cleaning and calibration. See 

2. Print the Configuration page and Supplies Status page again.

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If the pages print correctly, then the problem is in the program, the computer, or the
printer driver.

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If the pages do not print correctly, then the problem is in the printer hardware. The
problem might be the fuser or the imaging drum.

3. Change the Type setting in the printer driver, or change the print mode. If this step does

not help, proceed to the next step.

ENWW

Solving image-quality problems