Daktronics AB-1600-1.5,2.5 - Manual (Page 68)

Maintenance & Troubleshooting 4-24
4. Remove the vertical bracket by removing the eight screws that hold it in place.
5. The metal rain shield is now free to be slide upward and off the lens/reflector assembly.
6. On both top corners of the assembly is a retaining tab bent over the top louver. With pliers, bend
each of these tabs back in alignment with the metal side plates. The method used to position the
side plates for louver replacement is illustrated in Figure 68.
7. Push each metal side plate downward until it is free to be pulled away from the assembly.
Replacing only the top louver does not require the removal of the side metal plates.
8. Having removed the side plates, the only thing holding the rows of louvers/reflector together is the
tape weather stripping between them. The damaged louver can be accessed by pulling the rows
above this louver off in an intact group, as illustrated in Figure 67. There are now two groups of
row/reflector assemblies.
9. In the same manner as done with the metal side brackets, slide the damaged louver to the side and
remove it from the row of reflectors beneath it. Discard it unless it is to be returned to Daktronics.
10. Place the new louver onto the reflector row and slide it to the side until it is secured in place
beneath the top reflector tabs.
11. Remove the protective tape from the tape weather stripping to expose the adhesive surface.
Nothing, especially hands, should touch the exposed adhesive surface of the weather stripping. The
top louver of an assembly does not have tape weather stripping.
12. With both groups of reflector rows lying on their backsides, carefully join them together by pressing
the adhesive face of the tape against the underside of the above reflector row. Line up the
reflector rows as accurately as possible. Leave the reflector/louvers laying down for the next step.
13. Place the metal side plates on each side of the reflector/louver rows and slide them into position
beneath the side reflector tabs.
14. With pliers, bend the two top retainer tabs back over the upper louver.
15. Slide the rain shield back into position on the rear of the lens/reflector assembly then reattach the
vertical bracket and the lampbank latches. The longer screws are used for the latches. The top
Figure 66: Lens Assembly
Components
Figure 67: Separating rows above a
damaged louver
Figure 68: Removing a metal side plate