Daktronics BA-515 - Manual (Page 46)

9.11 Structural Inspection
Perform a visual inspection annually. Check the paint and look for possible corrosion, especially at
footings, structural tie points, and ground rods. Fasteners should be checked and tightened or replaced
as required.
At least once a year, check the inside of the display for signs of water intrusion (for example, water
stain marks). Water can enter a display where weatherstripping has come loose or deteriorated.
Fasteners may also have loosened, allowing moisture to enter through seams in the display. Check the
top of the display around the eyebolts to insure that no moisture may enter through loosened fixtures.
Check electronic components closely for signs of corrosion.
9.12 Cleaning the Signal Connectors
If it becomes necessary to remove or replace a signal cable, clean the plugs and the circuit board jacks
with Deoxit
 (refer to Section 9.14 for the part number). Inspect and clean the jacks and plugs
thoroughly to ensure the absence of any foreign matter. The presence of dirt or water may cause signal
interconnect problems.
After the parts are cleaned, push the plug into a jar of Cailube
 (refer to Section 9.14 for the part
number), ensuring that the paste wets the plug to a depth of at least 1 /
8
" on all four sides. Also check to
make sure that all of the pin holes of the plug are filled with paste and that sufficient paste is present to
form a "V" on the end of the plug. There should be enough paste on the end of the plug to form a
weatherproof seal (from paste pushed out around the jack) when the plug is inserted into the circuit
board jack.
Deoxit ™ is the electrical contact cleaner in an aerosol can, and Cailube ™ is the electrical contact
lubricant and protector paste in a 1oz jar. Both can be found in the Tool Kit Accessories package.
Cailube also comes in an 8 oz jar (refer to Section 9.14 for the part number). If you need additional
supplies, contact Customer Service for ordering information.
9.13 Troubleshooting
This section contains some symptoms that may be encountered in team name message centers. For
these symptoms, possible causes and corrective actions are suggested. This list does not include every
possible problem, but does represent some of the more common situations that may occur. Refer to
Section 8.9 for a list of potential scoreboard problems.
Symptom/Condition Possible Cause/Remedy
One or more lamps on display will not
light. Replace lamp
Replace socket
Replace lampbank
One or more lamps will not turn off. Check for foreign objects on PC board
Replace lampbank
9-8 TNMC Maintenance
and Troubleshooting