Daktronics AB-1600-1.5,2.5 - Manual (Page 43)

Maintenance & Troubleshooting
4-7
7. Repeat the same step for the remaining side of the module.
8. With both latches released, grasp the lens assembly with both hands and push the entire
module forward and out through the front of the display.
9. Turn the lens assembly until it can pull back through the opening in the display, allowing
removal.
Note: In some cases, components mounted to the display cabinet will not allow a module to
pull through the opening created by removing the module. In this case, remove the lens
assembly above or below that section first and remove the module through that opening.
10. Remove the safety lanyard from the side brackets and gently lay the lens assembly, lens side
down, on a static free surface.
Rear Accessible Displays – Replacing a Module
Modules should fit into the matrix from the front of your display. However, there may be
situations where you only have rear access. To replace the module from the rear, first connect it to
the display with a safety lanyard (refer to Appendix B).
1. With the safety lanyard in place, pass the lens assembly through the opening, rotated right
side up, and then pull it back into place.
2. When pulling the lens assembly into place, it should be tilted about 30 degrees so the bottom
goes in first.
3. Pull the lens assembly firmly back into place until the latches, one on each side of the frame
verticals snap into place.
There are some areas on the display where components prevent the lens assembly from passing
through the opening in the display. In this case, remove a second lens assembly above or below
the first one. This creates an opening large enough for the lens assembly to pass through.
Lens assemblies must fit together tight so the weather stripping forms a good seal and prevents
water from leaking between the lens assemblies and into the display. Check the seal between the
assemblies with a 0.032” feeler gauge. Refer to Section 4.17.
4.4 Lenses
A lens is in front of each lamp in the each lens/reflector
assembly. The lenses, along with the reflectors, direct the light
from the display. 128 lenses are on each lens/reflector
assembly.
Compete the following steps to remove a lens from a
lens/reflector assembly.
• = Carefully pry out the lens tab using the lens/lamp extractor
found in the tool kit. The lens tab is located at the top center
of the lens. Refer to Figure 44. If necessary, gently press up
on the louver above the lens to aid in removal. Applying
excessive force to the louver may cause it to become
deformed. Refer to Figure 45.
Figure 44: Individual Lens