Bedienungsanleitung HP Officejet 150 - L511 (Seite 88 von 137) (Englisch)

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◦ The accuracy of the software depends on the image quality, text size, and

structure of the original and the quality of the scan itself. Make sure that

your original has good image quality.

◦ Colored backgrounds can cause images in the foreground to blend too

much.

Error messages appear

• "Unable to activate TWAIN source" or "An error occurred while acquiring

the image"

◦ If you are acquiring an image from another device, such as a digital camera

or another scanner, make sure that the other device is TWAIN-compliant.

Devices that are not TWAIN-compliant do not work with the HP software.

◦ Make sure that you have connected the USB cable to the correct port on the

back of the computer.

◦ Verify that the correct TWAIN source is selected. In the software, check the

TWAIN source by selecting Select Scanner on the File menu.

• Error, The Scan cannot be performed because another program has control

of the HP imaging device

If you are using a computer running Mac OS X, quit the HP Scan application. If

you get the error message again, restart the computer and try to scan again.

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

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.

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 scanned image is skewed (crooked)

The original might have been placed incorrectly. Be sure to use the media guide when

you load the original. For more information, see

Load an original in the scanner.

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 the 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.

Chapter 6

84 Solve a problem

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HP Officejet 150 - L511 Seite 88

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