13 Replacing the laser print cartridge. 13 Cleaning. 13 Material Safety Data Sheet. 15 Certifications. 19 Laser Safety. 19 Radio Frequency Emissions. 20 Ozone Safety. 20 Reference Guide iii iv Phaser 3400 Personal Laser Printer Loading the optional trays Loading the optional trays Loading instructions are also located on the labels inside the tray. Caution Do not remove a tray while printing; this may cause paper jams. For information on loading the standard tray, refer to the Phaser 3400 Personal Laser Printer User Guide on the printer CD-ROM. Loading the optional A5/A6 tray 1. Remove the tray. 1710-52 2. Push the metal (bottom) plate down until it locks into place. 1710-04 3. If necessary, adjust the tray length. For legal or folio size paper, press the tab down and pull the rear wall all the way out. 1710-27 Reference Guide 1 Loading the optional trays Note For a list of supported media types, sizes, and weights for this tray, see the Phaser 3400 Personal Laser Printer User Guide. Load the paper. I Make sure that you place the paper under the corner tab in the left-front corner of the tray...