User manual DA-LITE MULTI-MASK IMAGER

[. . . ] Without the screen fabric attached, position the frame on the wall at the location you desired. (You may need to use shims between the brackets and the wall to achieve vertical plumb. ) 3. L CAUTION: If the screen is not mounted so that it is level and plumb, horizontal masking may jam on retraction. FIGURE 2 2 Unpacking and unrolling the screen The viewing side of the screen surface is rolled to the inside. Allow the paper to unroll between backside of the screen surface and floor. [. . . ] If an obstacle (such as a person or furniture) gets in the path of a mask as it is lowered, you should use the switch control to stop the mask's motion; it will not automatically stop if it hits an obstacle. NOTE: The horizontal masking panels move more slowly than the vertical masking panels. The slower motion allows you to adjust the image area with greater precision. When a mask is not in use, you should store it in the fully retracted position. !L CAUTION: Do not operate the motor when any of the following occurs: · The unit emits any smoke, heat, abnormal noise or unusual odor. · 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 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. 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. To increase a mask's fully extended (mask down) stop position: 1. Locate the down limit switch(es) located on the left side of the frame. 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. Locate the down limit switch(es) located on the left side of the frame. NOTE: One complete turn of the switch will make approximately a 1/2" change in the mask's stop position. [. . . ] Mask won't roll up or down (even though power is available. (a) Bad connection at switch. 3. Mask roller chatters when power is activated. (a) Can be caused by voltage drop, bad connections or a defective switch. 4. Unit hums in up mode (Mask has already retracted). (a) The mask batten is retracting too far into the case. Mask drops when up direction is activated (grinding noise occurs). (a) Mask motor requires full voltage. [. . . ]