Daktronics Valo Digital Billboard - Manual (Page 38)

Routine Maintenance
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5. Verify the quality of the silicone where the fan hood meets the back sheet.
6. Inspect the silicone along the top shroud. Reapply silicone to any areas where the
silicone is missing or peeling.
7. Check the fan hoods to ensure they have the grill covers at the fan hood opening. If
the fan hoods have fine mesh screens, replace them with grill covers. Refer to the fine
mesh screen replacement procedure in Section 5.1.
Water Intrusion Inspection
1. Check section splices for water trails. Follow the water trail to its source 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.
Modules
1. Ensure all modules are seated properly. Work with the NOC to run a red test pattern
then view the display from one end and look down the face of the display to inspect for
modules that are sticking out.
2. Check for stuck pixels, bent LEDs, broken louvers, and other issues that may affect the
display image quality.
3. 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.
Remote Enclosure
1. Inspect the remote enclosure for overall integrity.
2. Check the remote enclosure for signs of water intrusion, especially at entry locations.
3. Check the a/c filter in the remote enclosure. Wash the filter if it is dirty.
4. Visually inspect the electronics and cabling in the remote enclosure. Look for worn
cables, connectors, dust in the computer or V-Link fans, corrosion, etc.
5. Verify that the key to the spare parts box is in the remote enclosure.