10 Paper and Other Media182 Xerox CopyCentre/WorkCentre/WorkCentre Pro 123/128 User GuideTandem Tray Module (TTM)The Tandem Tray Module allows you to load larger amounts of paper. It consists of twotrays.NOTE: You cannot load custom size paper into the Tandem Tray Module.1. Pull out the Tray 3 or Tray 4 ofTTM.The elevator in the tray lowers.2. Place the paper stock tightlyagainst the left rear corner of thetray.NOTE: Do not load paper above themaximum fill line.NOTE: Always load paper into the tray in the orientation shown in the diagram.3. Close the tray.The elevator rises and positions the paper for use.Auto Tray SwitchingThe machine automatically switches from one tray to another under the followingcondition.• When printing and the active tray runs out of paper.• When the paper size sensed differs from the previously determined size.• When paper feeding starts and the selected tray is open.• When paper feeding starts and the selected tray malfunctions.NOTE: The bypass tray cannot be used with Auto Tray Switching.NOTE: Key Operator access is required to set target trays and priorities. For moreinformation, refer to Paper Tray Priority in the Setups chapter on page 193 and PaperType Priority in the Setups chapter on page 194.When not in use, the paper trays can be opened and paper can be loaded while themachine is running. However, do not open the active tray. This will cause the machineto stop the job being processed.Storing and Handling PaperAlways use high-quality, xerographic-grade paper in the machine. Damaged, curled, ordamp paper can cause jams and image quality problems. Follow these simple rules tostore paper.