User manual DA-LITE MULTI-MASK IMAGER

[. . . ] Frame Assembly Assembly of the screen should be in a clean environment. Connect the four frame pieces by matching the colored tapes on the ends of the frame pieces. Secure with the supplied 5/16" setscrews. FIGURE 1 Positioning the frame on the wall 1. Without the screen fabric attached, position the frame on the wall at the location you desired. [. . . ] · The unit is damaged in some way, such as damage from a water leak. If any of these situations occur, call a qualified service person. ADJUSTING THE MASK EXTENSION !L CAUTION: Improper adjustment of the limit switches can cause irreparable damage to a mask itself, resulting in voiding the factory warranty. The extension and retraction limit switches have been preset at the factory. In general, we advise you to avoid readjusting these switches. In some cases, to enable proper alignment of the displayed image on the screen, you may need to adjust the extension of a mask. If adjustment to the extension is necessary, carefully follow these instructions. A mask is fully retracted when the batten is flush with the bottom of the case. Do not attempt adjustments with a retraction (UP) limit switch that will further retract a mask. Incorrect adjustment of that switch will cause severe mask damage. Please consult the factory if you have any questions. 6 Modifying the extension of the mask You can increase the extension of a mask up to 3" past the factory preset stop, or you can decrease the extension by approximately 4-6" from the factory preset stop. Do not attempt to modify a mask extension beyond these recommended amounts. The limit switches are accessed through openings located on the left side of the frame as shown in Figure 8. 1 HORIZONTAL MASK 2 3 4 VERTICAL MASK SCREEN 5 6 HORIZONTAL MASK FIGURE 8 Horizontal mask units have limit switches at the top and bottom of the screens, a set for each roller tube. The up limit switch(es) retract the batten further into the unit. Refer to 1, 3 or 5 as appropriated in Figure 8. To increase a mask's fully extended (mask down) stop position: 1. Lower the mask to its current stop position. Locate the down limit switch(es) located on the left side of the frame. Refer to 2, 4 or 6 as appropriate in Figure 8. Use an Allen wrench to turn the switch in a counterclockwise direction. If the power is on, the mask will drop incrementally as the switch is turned. NOTE: One complete turn of the switch will make approximately a 1/2" change in the mask's stop position. Lower the mask until it is extended about halfway down. [. . . ] Mask continues past bottom stop position. Batten retracts too far into frame. (a) White limit switch is out of adjustment. (a) Yellow limit switch out of adjustment. Do not use the unit until this problem is resolved. [. . . ]