Troubleshooting / Problems and Solutions

# Scanning Problems

> You cannot scan an image or you only get a few dots for the scanned image.
> A line of dots always appears in the scanned image.
> Straight lines in the image come out jagged.
> The image is distorted or blurred.
> Colors are patchy or distorted at the edges of the image.
> The image is dark.
> Moiré (cross-hatch) patterns appear in the scanned image.
> The image is larger or smaller than the original.
> Colors differ from the original.
> Images cannot be located properly in the Thumbnail preview.

## You cannot scan an image or you only get a few dots for the scanned image.

Try one or more of the following solutions:

- Make sure the document is set in the source holder with the side to be scanned facing up.

- When scanning with the Black&White setting in the Home Mode or the Professional Mode, change the Threshold setting.

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## A line of dots always appears in the scanned image.

If this happens on both your screen image and printout, this indicates that the source holder may be dusty or scratched. Clean the source holder.

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## Straight lines in the image come out jagged.

Make sure the document orientation is perfectly straight to the source holder. Align the vertical and horizontal lines with those of the source holder.

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## The image is distorted or blurred.

Try one or more of the following solutions.

- Make sure you do not accidentally move the document while scanning.

- Make sure the scanner is on a flat, stable surface.

- Change the Display Gamma setting of scanned image for your output device, such as a monitor or printer, in the Configuration dialog box.

- Select U nsharp Mask Filter in the Professional Mode main window. If moiré patterns appear in the image, see Moiré (cross-hatch) patterns appear in the scanned image. for more information.

- Select Color Control and also check Continuous auto exposure in the Configuration dialog box, or adjust the Exposure setting using the Auto Exposure button in the Professional Mode main window.

- Change the Resolution setting for your document.

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## Colors are patchy or distorted at the edges of the image.

Adjust your software's Gamma setting using the Histogram Adjustment dialog box in the Professional Mode.

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## The image is dark.

Try one or more of the following solutions.

- Check your software's Brightness setting using the Image Adjustment tools in the Home Mode or the Histogram Adjustment dialog box and the Image Adjustment dialog box in the Professional Mode.

- Check the brightness and contrast settings of your computer display.

- Select Color Control and also check Continuous auto exposure in the Configuration dialog box, or adjust the Exposure setting using the Auto Exposure button in the Professional Mode main window.

- Change the Display Gamma setting of scanned image for your output device, such as monitor or printer, in the Configuration dialog box.

- Change the Destination setting in the Home Mode or the Professional Mode main window.

- In the Home Mode, select Screen/Web as Destination. Selecting a printer may cause on-screen colors to be different from the colors of the original; however, the colors will be reproduced correctly when the image is printed.

- Each source holder has a window on the upper part. The window makes up for the lack of light for proper scanning. Make sure the window is not covered.

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## Moiré (cross-hatch) patterns appear in the scanned image.

A moiré is a cross-hatch pattern that appears on the scanned images when you scan printed materials. It is a result of interference that occurs due to the difference between the pitches of the scanning and the halftone screens.

Try one or more of the following solutions.

- Select the Descreening Filter check box in the Home Mode or the Professional Mode main window.

- In the Professional Mode, set the Screen Ruling of the Descreening Filter setting to an appropriate setting for your document.

- Clear U nsharp Mask Filter in the Professional Mode main window.

- Reposition the document slightly.

- Make the image size slightly smaller.

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## The image is larger or smaller than the original.

Try one or more of the following solutions.

- The image size and resolution settings of your software determine the size of the printed image. Do not use the size of the monitor image to judge the printed size.

- Change the Target Size setting of the Destination setting in the Home Mode or the Professional Mode main window.

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## Colors differ from the original.

Try one or more of the following solutions.

- Change the Image Type setting.

- Change the image settings of your scanner software, especially the data format (bits, pixel, color), gamma correction, and color correction. Try different combinations of these settings.

- Change the Display Gamma setting of scanned image for your output device, such as monitor or printer, in the Configuration dialog box.

- Select Color Control and check Continuous auto exposure in the Configuration dialog box. Or adjust the Exposure setting using the Auto Exposure button in the Professional Mode main window.

- Check the color matching and color management capabilities of your computer, display adapter, and software. Some computers can change the color palette to adjust the colors on your screen. See your software and hardware documentation for details.

- Use the color management system for your computer: ICM for Windows, or ColorSync for Macintosh. For Windows, add a color profile that matches your monitor.

- Exact color matching is very difficult. Check your software and monitor documentation for information on color matching and calibration.

- Printed colors do not exactly match the colors on your monitor, since printers and monitors use different color systems: monitors use RGB (red, green, and blue), while printers typically use CMYK (cyan, magenta, yellow, and black).

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## Images cannot be located properly in the Thumbnail preview.

Try one or more of the following solutions.

- In the Preview window, create marquees on the area you want to scan, and then scan.

- In the Configuration dialog box, adjust the thumbnail cropping area using the Thumbnail Cropping Area slider.

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