Daktronics Valo Digital Billboard - Manual (Page 41)

5. Inspect the silicone along the top shroud. Reapply silicone in any areas where the
silicone is missing or peeling.
6. Inspect the area where the a/c units interface with the display. Verify light is not
visible around the edge of the display. Fill any leaks with polyurethane foam sealant.
7. Verify the a/c unit and/or fans are operating properly. Check the condition of all
filters and replace as needed.
Water Intrusion Inspection
1. Check section splices for water trails. Follow the water trail and silicone as needed.
2. Check the inside of the display at several locations for evidence of water intrusion,
corrosion, or water stains. Include the cabinet, modules, power supplies, MLCs, and DDs
in the inspection. Photograph any evidence of water intrusion.
Thermostats
1. Ensure all thermostats in the display are set to 85° F. If thermostats are not set to 85°F,
contact a Billboard Technician at 1-877-325-4357 to verify the display-specific thermostat
settings.
Modules
1. Ensure all modules are seated properly. View the display from one end and look down
the face of the display to inspect for modules that are sticking out.
2. Inspect the gaskets on the back of a few modules and ensure they are in good condition.
3. Check modules for pixels out, stuck pixels, bent LEDs, broken louvers, and other issues
that may affect the display image quality.
4. Remove any loose modules and inspect them for stripped gears, broken latches,
unlatched modules, etc. If the gears are plastic, replace them with metal gears. If a
module has a broken module latch, replace the module and send the other module to
Daktronics for repair.
5. Fill in weep holes in any 23 mm modules that were removed. Refer to Figure 15.
Figure 15: Fill in 23 mm Weep Holes
Routine Maintenance 33