30Setting input ports using menu3M™ Digital Projector X56© 3M 2011. All Rights Reserved.5.3 Starting up Main projectorAfter performing section 5.2 Checking Main projector's operating status, the twoprojectors are confirmed to have been set to ALTERNATE mode and the Subprojector is currently operating. As the settings for Intellectual Stack can bechanged only when the Main projector is operating, this section explains how toswitch from the Sub projector to the Main projector.1. Use the ▲/▼/◄/► buttons to go into the following menu.ADVANCED MENU > OPTION> SERVICE > COMMUNICATION > STACKSTACK menu will appear on screen.(Operator's Guide → OPTION menu)2. Check the ALTERNATE MODE setting in the menu.If NORMAL is displayed, the two projectors are turned on alternately. Therefore,the Main projector will be turned on if you restart the projectors.(1) Press the STANDBY/ON button on the remote control or control panel of theMain projector, the Sub projector will turn off.(2) After the projector has cooled down, press the STANDBY/ON button to turn onagain. The Main projector will be turned on.If AUTO is displayed, the projector with the least lamp usage is turned on.Therefore, the Main projector may not be turned on even if you restart theprojectors. Follow the procedures below to turn on the Main projector.(1) Use the ▲/▼ button to highlight STACK MODE, and press the ► button todisplay the STACK MODE dialog.(2) Use the ▲/▼ button to highlight OFF, and then press the ► button to completethe setting. (23)(3) Repeat the above procedures to display the STACK MODE dialog again.(4) Use the ▲/▼ button to highlight SUB, and then press the ► button tocomplete the setting. (23)(5) After exiting the menu, wait for 10 seconds or more.(6) Press the STANDBY/ON button on the remote control or control panel of theMain projector, the Sub projector will turn off.(7) After the projector has cooled down, press the STANDBY/ON button to turn onagain. The Main projector will be turned on even if LAMP MODE has been setto AUTO.3. You can change the settings for Intellectual Stack now that the Main projectoris operating. Go to 5.4 Setting the menu. (31)NOTE • If the Main projector cannot be turned on due to error or certainproblems, the Sub projector will be turned on even if you follow the proceduresabove. Take necessary actions to fix the Main projector, and then change thesettings for Intellectual Stack.