HP LaserJet Enterprise MFP M637 User Guide - Page 261

Improve fax image quality If the printer is having fax quality problems, try the following solutions in the order presented to resolve the issue. 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 Learn about solving copy-quality debris problems. Over time, specks of debris might collect on the scanner glass and document feeder white plastic backing, which might cause print defects. 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. 2. Open the scanner lid. ENWW Improve fax image quality 253