Maintenance > 129CLEANING...THE UNIT CASING1. Switch the printer off. Refer to “Turning off your machine” on page 21 for details.2. Wipe the unit surface with a soft cloth moistened sparingly with water or neutraldetergent.3. Use a soft dry cloth to dry the unit surface.4. Switch the printer on....THE LED HEADClean the LED heads when printing does not come out clearly, has white lines or when textis blurred.There is no need to switch off the printer to clean the lens.1. Gently raise the scanner.2. Press the cover release (a) and open the top cover (b) fully.CAUTION!Use a clean, moist, lint-free cloth for cleaning. Do not use benzine,thinners or alcohol as a cleaning agent.ab