Daktronics BA-1518-11 Multi-Section Outdoor LED Scoreboard - Manual (Page 56)

9.6 TNMC Display Maintenance
Complete a yearly inspection to maintain safe and dependable display operation. This inspection
should address the following issues:
+ Loose Hardware
Verify that fasteners, such as bolts and rivets, have not come loose. Check and tighten or
replace fasteners as required.
+ Excessive Dust Buildup
Occasionally it may be necessary to vacuum the inside of the display cabinet to remove
dust/dirt buildup that may interfere with airflow.
+ Water Intrusion – Water Stain Marks
Water can enter the display where weatherstripping has come loose or deteriorated; where
fasteners have come loose, allowing gaps in the panels; or where moisture may be entering
around hardware. Check electronic components for displays of corrosion.
+ Corrosion
Check the paint, and look for possible corrosion, especially at footings, structural tie points,
and ground rods and other types of grounding electrodes.
If you notice any of the preceding conditions, make repairs or take corrective actions
immediately.
9.7 Troubleshooting
This subsection contains some symptoms that may be encountered in the displays. This list does not
include every possible symptom, but does represent common situations that may occur.
Symptom/Condition Possible Cause/Remedy
One or more LEDs on a single
module fail to light. § Check/replace the ribbon cables on the module.
§ Replace the module.
One or more LEDs on a single
module fail to turn off § Check/replace the ribbon cables on module.
§ Replace the module.
A section of the display is not
working; the section extends all the
way to the right side of the display. § Replace the first module/driver on the left side of
the first module that is not working.
§ Replace the second module that is not working.
§ Replace the power supply assembly on the first
module that is not working.
§ Replace the ribbon cable.
One row of modules does not work
or is garbled. § Replace the first module.
§ Replace the controller.
§ Check the fuses in the power termination box.
A group of modules that share the
same power supply assembly fails
to work. § Replace the power supply assembly.
TNMC Maintenance 9-8