Epson ES-300C User Manual - TWAIN 32 - Page 63
Troubleshooting, Gamma Correction, Brightness, Shadow, Screen
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Color is patchy or distorted at the edges of the document. If the original is very thick or warped at the edges, the edges of the image may be discolored. Cover the edges of the original with opaque paper to avoid having outside light interfere. If part of the original is outside the document table, the edge may not be in contact with the document table and may be discolored. Change the position of the original. The image is faint or out of focus. Make sure the document is placed flat on the document table. Check your Gamma Correction setting. Make the Brightness setting darker. Make sure you have calibrated your monitor and printer to your scanner, and that you are using the resulting calibration profile. See Chapter 2 for more information. The image is too dark and without details. Adjust the Brightness, Gamma Correction, and Shadow settings to lighter values and scan the image again. Also check the brightness and contrast values of your monitor. Check that the Destination output device is set correctly. If it is set to Screen, output on the printer may be too dark. Straight lines in the image are jagged. The document may be placed at an angle on the document table. Align it so that the horizontal and vertical lines are carefully aligned with the rulers on the document table. 6-10 Troubleshooting