HP Color LaserJet Managed MFP M775 User Guide - Page 280
Check the resolution settings, watch?v=CGn7FJvH8sE, Administration, Scan/Digital Send Settings
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3. Clean the main scanner glass, the documentfeeder glass (the small strip of glass on the left side of the scanner), and the white foam backing. Use a soft cloth or sponge that has been moistened with nonabrasive glass cleaner. Dry the glass and white plastic backing by using a chamois or a cellulose sponge to prevent spotting. CAUTION: Do not use abrasives, acetone, benzene, ammonia, ethyl alcohol, or carbon tetrachloride on any part of the product; these can damage the product. Do not place liquids directly on the glass or platen. They might seep and damage the product. NOTE: If you are having trouble with streaks on copies when you are using the document feeder, be sure to clean the small strip of glass on the left side of the scanner. NOTE: See this English-language video for a demonstration of how to identify and clean debris that causes streaks on copies: www.youtube.com/watch?v=CGn7FJvH8sE. 4. Connect the power cable to an outlet, and then press the power button to turn on the product. Check the resolution settings NOTE: Setting the resolution to a high value increases the file size and the scan time. 1. From the Home screen on the product control panel, scroll to and touch the Administration button. 2. Open the Scan/Digital Send Settings menu. 3. Select the category of scan and send settings that you want to configure. 4. Open the Default Job Options menu. 5. Touch the Resolution button. 266 Chapter 10 Solve problems ENWW