Daktronics Valo Digital Billboard - Manual (Page 42)

Routine Maintenance
34
6. On 16 OT displays, work with a NOC technician to determine if the modules need gasket
inspection. If so, check 10 -20 modules, take pictures, and contact the NOC to determine
what to do with the information.
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. Allow it to dry
before inserting it.
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. Check the battery level of the UPS in the remote enclosure.
6. Verify that the key to the spare parts box is in the remote enclosure.
Spare Parts Box
1. Inspect the spare parts box for signs of water intrusion.
2. Inventory all spare parts in the box. Use the chart in DD1536475 in Appendix A.
3. Lock the spare parts box and place the keys in the remote enclosure.
Display Visual Inspection
1. Visually inspect the display from ground level for module discoloration or other visual
issues. Contact a NOC technician to recalibrate the display remotely to restore
uniformity.
Display Power
1. Verify the display is properly grounded. Measure the display grounding. It should
measure 10 Ohms or less. If display grounding reads more than 10 Ohms, improve
display grounding until it reads 10 Ohms or less.
2. Verify breaker panels, termination panels and cable connections are secure.
3. Verify the voltage on each leg. If the voltage reading is not equal to 120v ± 5 on each leg,
check the amperage in the displays breaker panels. Call a NOC technician to discuss
potential actions or solutions.
Completing the Inspection
1. Upon completing the inspection, call 1-877-325-4357 to speak with a Billboard Technician
who will request the findings, enter them into the system, and check for non-visual
diagnostic errors that need resolution.