Appendix 3—Shading Adjustment
About Shading Adjustment
What Is the Purpose of Shading Adjustment?
The process whereby variations in the distribution of the scanning lamp’s quantity of light are transformed into a fixed output within the scanning range is known as shading adjustment. Shading adjustment can be performed using the Trūper User Utility and the special shading paper that is provided with the scanner.
When Is Shading Adjustment Required?
Perform shading adjustment when the density of the scanned images is uneven and the image displays perpendicular lines, when colors in some parts of the scanned image are extremely different from what is expected, or when the image quality fails to be improved even after cleaning inside the scanner.
Shading Adjustment Procedure
Preparation: Before performing shading adjustment, thoroughly clean the scanner’s drive rollers, reference plates and ADF glass areas. If shading adjustment is carried out while these parts are still dirty, it will not be possible to eliminate the lines that form on the scanned images. Follow the cleaning procedures beginning on page 77.
1
2
Click the 
icon to open the Trūper User Utility.
Click the User Shading button on the main menu and follow the instructions. See also “User Shading” on page 95.
ÂNote
If the scanned images are still lined after shading adjustment has been performed and if these lines are not eliminated even after the ADF glass areas have been cleaned, it means that the shading has not been compensated properly. Clean the parts again and perform the shading adjustment procedure again.
Additional shading paper for shading adjustment is available from the Böwe Bell + Howell Scanning Essentials online store at http://webstore.bbhscanners.com or from the reseller where you purchased the Trūper scanner. See also the “Consumable Parts and Accessories List” on page 13.
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