Daktronics AF-3065-34-RGB - Manual (Page 33)

To replace a fiber optic board:
1. Disconnect the power and signal connections (refer to Figure 24 for disconnection of power).
2. The fiber optic board is held in place with four screws. Carefully remove them.
3. Install the new fiber board, replace the screws and reconnect power and signal cables.
4.5 Ventilation Systems (With Fans and Filters)
Ventilation fans should be checked after 1,500 hours of operation and every 1,500 hours after that to
ensure the display is being cooled properly. Fans should be checked more often if the display is
located in a dusty or harsh weather environment (i.e. along a gravel road with dust laden air).
· 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 not in use.
· 1,500 hours is equivalent to 62 days if the display is running non-stop for 24 hours a day.
Each time a module is removed, for whatever reason, take a minute to inspect the fans.
· Check the fan blades for dirt and debris. If the fan blades have a large accumulation of dirt
and debris, this indicates that the filters must be changed more often. Fan blades must be kept
clean to maintain fan efficiency and ensure proper cooling.
· Spin the fan blades with a pen or pencil to ensure that the bearings are free and the fan is still
in balance.
To check the operation of the fans, push the bypass button (momentary contact) on the thermostat
enclosure to temporarily turn the fans on:
· Hold your hand or a piece of light paper beneath the display to detect air movement.
· If the fan does not turn or does not operate smoothly, replace it. It is located behind A102, top
row, second module from the left.
Filters must be checked once a year or after every 1,500 hours of operation, whichever comes first.
Filters can be cleaned with water and a mild detergent, such as dish soap. Compressed air can also be
used to clean the filters provided the nozzle is held at least six inches away from the filter, the pressure
is no greater than 60 psi and the air is blown through the filter in the opposite direction from which air
normally flows. The arrow stamped on the frame filter indicates air flow direction.
4.6 Thermostats
Reference Drawings:
Component
Layout Diagram........................................................................... Appendix B
A thermostat controls when the ventilation fans are turned on in the display. Refer to the Component
Layout Diagram for the location of the thermostat. The ventilation fans turn on when the inside of the
display reaches 85
° F (29° C), and turn off at 70° F (21° C).
4.7 Weather Stripping
To ensure that the display is waterproof, weather stripping has been provided around the entire display
and around each module. It is important that the weather stripping is installed properly at all times or
water may leak into the display and damage the components.
Maintenance & 4-7
Troubleshooting