HP Officejet Pro L7550 - Scanned image quality is poor

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Scanned image quality is poor

The original is a second-generation photo or picture
Reprinted photographs, such as those in newspapers or magazines, are printed by
using tiny dots of ink that make an interpretation of the original photograph, which
degrades the quality. Often, the ink dots form unwanted patterns that can be detected
when the image is scanned or printed or when the image appears on a screen. If the

Solve scan problems


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following suggestions do not solve the problem, you might need to use a better-quality
version of the original.

To eliminate the patterns, try reducing the size of the image after scanning.

Print the scanned image to see if the quality is better.

Make sure that the resolution and color settings are correct for the type of scan job.

For best results, use the flatbed scanner for scanning rather than the ADF.

Text or images on the back of a two-sided original appear in the scan
Two-sided originals can "bleed" text or images from the back side to the scan if the
originals are printed on media that is too thin or too transparent.

The image quality is better when printed
The image that appears on the screen is not always an accurate representation of
the quality of the scan.

Try adjusting your computer monitor settings to use more colors (or levels of
gray). On Windows computers, you typically make this adjustment by opening
Display on the Windows control panel.

Try adjusting the resolution and color settings.

The scanned image is skewed (crooked)
The original might have been loaded incorrectly. Be sure to use the media guides
when you load the originals into the ADF. For more information, see

Load the



The scanned image shows blots, lines, vertical white stripes, or other defects

If the scanner glass is dirty, the image produced does not have optimum
clarity. See

Clean the device

for cleaning instructions.

The defects might be on the original and not a result of the scanning process.

Graphics look different from the original
The graphics settings might not be suitable for the type of scan job that you are
performing. Try changing the graphics settings.

Take steps to improve the scan quality

Use the flatbed scanner to scan rather than the ADF.

Use high-quality originals.

Load the media correctly. If the media is loaded incorrectly, it might skew,
which causes unclear images. For more information, see

Load the originals


Adjust the software settings according to how you plan to use the scanned

Use or make a carrier sheet to protect your originals.

Clean the scanner glass. See

Clean the scanner glass

for more information.

Chapter 10


Maintain and troubleshoot