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Maintenance and Troubleshooting

Scanning Problems

Image is dark, with little or no detail.
You cannot scan an image or you only get a few dots for the scanned image.
Moiré (cross hatch) patterns appear in the scanned image during halftone scanning.
Colors differ from the original or look strange.
Scanned image is too large.
Poor character recognition during OCR scanning.
You cannot scan from the Automatic Document Feeder.
Scanning does not start by pressing the Start button.
Scanned image by using the Start button is missing.

Image is dark, with little or no detail.

Calibrate the screen as described in Calibrating Your Screen.

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

• Make sure you have placed a document on the document table of the scanner.

• Change the Threshold setting in the Image Controls dialog box. See Image Controls.

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Moiré (cross hatch) patterns appear in the scanned image during halftone scanning.

• Select the 24-bit Color De-screening or 8-bit Gray De-screening from the Image Type list box.

• Place a transparent sheet such as an overhead projector sheet between the document and document table to defocus the image.

• Reposition the document slightly.

• Make the image size slightly smaller.

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Colors differ from the original or look strange.

• Calibrate the screen. See Calibrating Your Screen.

• Change the Image Type setting. See Image Types to make sure your setting is correct.

• 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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Scanned image is too large.

Change the image size setting in main window. See Size.

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Poor character recognition during OCR scanning.

• Select Black & White as described in Image Types.

• Try adjusting the Threshold setting in the Image Controls dialog box.

• See Optimizing OCR Scanning for more information.

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You cannot scan from the Automatic Document Feeder.

• Make sure the Document Source setting is selected to ADF-Single-sided or ADF-Double-sided.

• Close the Automatic Document Feeder and try again. If the Automatic Document Feeder is opened while scanning, remove any jammed paper, and reload any document which has not yet been scanned and restart EPSON TWAIN HS.

• Take the jammed paper out and reload the document, then restart EPSON TWAIN HS.

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Scanning does not start by pressing the Start button.

• Check that the power cord is connected and press the OPERATE button to turn on the scanner.

• For Windows 98, 2000, and Millennium Edition users:

Click the Events tab in your scanner's Properties dialog box and make sure the Disable device events check box is clear. Also, make sure the Start button is selected as the Scanner events, and at least one scanner event recognizable application in the Send to this application box is selected. See your Setup Guide for details.

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Scanned image by using the Start button is missing.

Make sure desired application is assigned to the Start button.

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