HP N9120 HP Scanjet N9120 User Guide - Page 28

Chapter 3 To clean the scanner glass, follow these steps: 1. Press the Power switch to the off position, and then disconnect the USB cable and power cable from the scanner. 2. Open the scanner lid. 3. Clean the glass by using a soft, lint-free cloth that has been sprayed with a mild glass cleaner. CAUTION: Use only glass cleaner to clean the scanner glass. Avoid cleaners that contain abrasives, acetone, benzene, and carbon tetrachloride, all of which can damage the scanner glass. Avoid isopropyl alcohol because it can leave streaks on the glass. Do not spray the glass cleaner directly on the glass. If too much glass cleaner is applied, the cleaner could leak under the glass and damage the scanner. 4. Dry the glass with a dry, soft, lint-free cloth. 5. Reconnect the USB cable and power cable to the scanner, and then press the Power switch to the on position. NOTE: If cleaning the top surface of the glass does not remove all dirt and smudges from the glass, you can also clean the underside of the glass. Cleaning the underside of the glass requires that you disassemble the scanner. For instructions on how to clean the underside of the scanner glass, go to www.hp.com/support. Clean the scanner fan filters The scanner includes two customer-accessible fan filters. These filters prevent dust and debris from entering the fans. If the scanner is in a dirty or dusty environment, clean the filters monthly. For each fan filter, follow these steps: 1. Press the Power switch to the off position, and then disconnect the USB cable and power cable from the scanner. 2. Remove the filter cover. 26 Care and maintenance