HP LaserJet Enterprise MFP M633 User Guide - Page 234
Improve scan image quality, Check the scanner glass for dirt and smudges
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Improve scan image quality ● Check the scanner glass for dirt and smudges ● Check the resolution settings ● Check the image-adjustment settings ● Optimize scan quality for text or pictures ● Check the output-quality settings Try these few simple steps first: ● Use the flatbed scanner rather than the document feeder. ● Use high-quality originals. ● When using the document feeder, load the original document into the feeder correctly, using the paper guides, to avoid unclear or skewed images. If the problem still exists, try these additional solutions. If they do not fix the problem, see "Improve print quality" for further solutions. Check the scanner glass for dirt and smudges Over time, specks of debris might collect on the scanner glass and white plastic backing, which can affect performance. Use the following procedure to clean the scanner if the printed pages have streaks, unwanted lines, black dots, poor print quality, or unclear text. 1. Press the power button to turn the printer off, and then disconnect the power cable from the electrical outlet. 220 Chapter 9 Solve problems ENWW