Daktronics AB-1600-1.5,2.5 - Manual (Page 58)

Maintenance & Troubleshooting 4-14
Filter Removal (Rear Access)
Filters are easy to remove if your display provides
rear access.
Using the tab on the lower edge of the filter frame,
lift the bottom edge of the filter up about an inch
and out until it is free from the filter holder and
remove.
Filter Removal (Front Access)
Turn the two latches to the horizontal position and
remove the filter cover plate (refer to Figure 56).
Lift the filter up and out of the filter holder and pull it out through the access slot (refer to Figure
57).
4.9 Fans
Fans are provided to control the heat buildup generated by the electronic components. One cooling fan
will provide ventilation for eight to twelve 8 x 16 display modules (depending on display configuration).
Fans should be checked after the display has been in operation for 1500 hours and every 1500 hours
after that to ensure that 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).
1500 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 to ensure that the fans are not operating when the display is not
running. 1500 hours is equivalent to 62 days if the display is on running non-stop, 24 hours a day.
The fan operation can be easily checked on rear access displays.
•
Once the filters have been removed (refer to Section 4.8), turn the power back on.
•
Look up inside the rain shield and note if the fans are turning properly.
CAUTION: The fan blades are exposed during this step. Turn the power off when finished
checking the fans.
Each time a module is removed, take a minute to inspect the fans.
Figure 54: Filter Removal - Rear Access
Figure 55: Removal of the Filter Figure 56: Loosening the filter cover plate