Daktronics BA-515 - Manual (Page 43)

3. When finished, the stripping should be flush at the bottom. If the weather stripping is not
tight or buckles anywhere on the lens assembly, it will be difficult to reinstall it in the
display, and it will allow water to enter the display and damage the electrical components.
4. Check the module spacing and weather stripping tightness with the 0.032" feeler gauge.
Louver Maintenance
If display louvers become bent or damaged, they must be replaced. The lens/reflector assembly
containing the damaged louvers should be returned to Daktronics for repair or replacement.
9.6 Lamp Module Transformer
Displays with team name message centers are shipped with transformers which, when wired to the 120
V tap with a line voltage of 120 V, will deliver 11.0 volts to the lamp. Lamp life is estimated to be
17,000 hours with this transformer. Refer to Section 9.14 for the correct part number for the
replacement transformer
Due to input line voltage variations from site to site, the resultant lamp voltages may vary, which may
greatly alter lamp life.
If the measured input line voltage is over the particular transformer's rated input voltage, increased
voltage will be delivered to the lamp, and that will greatly reduce lamp life.
The transformer is may be adjusted both up and down if line voltage varies enough to greatly alter
lamp life/lamp brightness.
If the transformer requires adjustments, contact Daktronics Customer Service.
9.7 Fan Filters
Reference Drawing:
Filter Removal; 250 CFM Fan ............................................................... Drawing A-113986
Metal shrouds on the rear of the display house the fan filters and shed rain. Filters must be checked
every 1,500 hours of operation for accumulation of debris that could restrict airflow.
Check filters after the display has been in operation for 1,500 hours—and every 1,500 hours thereafter
– to ensure that the display is being cooled properly. Filters should be checked more often if the
display is located in a dusty or harsh-weather environment (that is, along a gravel road with dust-laden
air). The 1,500 hours is equivalent to 83 days if the display is operated for 18 hours a day and the
power to the display is turned off when it is not in use. (Turning off the power ensures that the fans are
not operating when the display is not running.) If the display is on running non-stop, 24 hours a day,
1,500 hours is equivalent to 72 days.
Daktronics recommends that spare filters be kept on hand at all times. Ideally, all filters should be
replaced during routine maintenance. If a filter media shows evidence of damage or wear, replace the
filter with a Daktronics filter. If a filter other than the Daktronics standard filter is used, follow these
criteria (refer to Section 9.14 for the part number of the filter):
1. Effective filter area must be no less than 2.3 square feet per 1.0 square feet of face area, and
2. Filter media must have an average arrestance of 90-92 percent.
TNMC Maintenance 9-5
and Troubleshooting