Xerox DocuMate 4790
User’s Guide
179
• After cleaning the scanner, do a test scan and view the final image file. Do not perform a shading
adjustment until after you clean the scanner and test scan. A shading adjustment performed
before cleaning the scanner may result in degraded image quality.
• Have the Shading Paper, provided with your scanner, ready as the software will tell you when to
insert it into the scanner.
• Make sure the Shading Paper is in-like new condition.
The Shading Paper should be kept in the plastic bag between the stiff cardboard when not in use.
If the Shading Paper is creased, torn, soiled, crumpled or dirty, the image quality will degrade
instead of improve after performing the Shading Adjustment.
If your Shading Paper is not in like-new condition, please order a replacement at
www.xeroxscanners.com in the Parts & Accessories page for your scanner.
• Change the front and back background reference plates to white. Please refer to the instructions in
section Changing the Background Color on page 164. During the shading adjustment you will
need to change the background color to white then to black. After the shading adjustment is
complete, choose the color you want the background to be.
To complete a shading adjustment:
1. Open the scanner User Utility application.
2. On the main window click on the User Shading... button.
3. Click on Start Shading to begin the shading adjustment. The shading adjustment utility will guide
you through the rest of the steps.
4. When prompted to clean the scanner click on OK to proceed only if you have already cleaned the
scanner during preparation. Otherwise, follow the instructions on screen and clean the scanner.
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