Daktronics AB-1600-1.5,2.5 - Manual (Page 66)

4-24 Maintenance & Troubleshooting
12. With both groups of reflector rows lying on their backsides, carefully join them together by
pressing the adhesive face of the tape against the underside of the above reflector row. Line up
the reflector rows as accurately as possible. Leave the reflector/louvers laying down for the
next step.
13. Place the metal side plates on each side of the reflector/louver rows and slide them into
position beneath the side reflector tabs.
14. With pliers, bend the two top retainer tabs back over the upper louver.
15. Slide the rain shield back into position on the rear of the lens/reflector assembly then reattach
the vertical bracket and the lampbank latches. Use the longer screws for the latches. The top
edge of the rain shield should not extend beyond the top of the assembly.
16. Apply new weather stripping to lens/reflector assembly as explained in Weather Stripping
Maintenance in Section 4.6.
17. Reattach both the lampbanks to the back of the lens/reflector assembly as explained in
Lampbanks in Section 4.3.
18. Remount the lens/reflector assembly in the cabinet as explained in Lens/Reflector Assemblies
in Section 4.3.
4.7 Filter Maintenance
Check the filters after the display has been in operation for 1,500 hours – and every 1,500 hours after
that – to ensure they are allowing air to enter the cabinet. Air cannot pass through a filter packed with
dirt and dust.
Check filters more often if the display is a dusty or harsh weather environment. Displays located along
gravel roads will likely require filter checks more often than every 1,500 hours. In addition, monitor
the filters if any area construction projects are throwing dust and/or dirt into the 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 to ensure that the fans are not operating when the display is not
running. 1,500 hours is equivalent to 62 days if the display is on running non-stop, 24 hours a day.
Daktronics recommends keeping spare filters on hand at all times. Ideally, filters require replacement
during routine maintenance. If a filter media shows evidence of damage or wear, replace the filter with
a Daktronics filter (Part Number L-98614).
If a filter other than the Daktronics standard filter is used, follow these criteria:
• Effective filter area is to be no less than 2.3 square feet per 1.0 square feet of face area and
• Filter media is to have an average arrestance of 90-92%.
Filters in Section 4.3 addresses filter removal.
Filter and fan maintenance take place as the same intervals – 1,500 hours. Refer to Section 4.8 for fan
maintenance information before replacing the filters.
4.8 Fan Maintenance
Above each filter, within the cabinet, is a fan. Check fans after the display has been in operation for
1,500 hours – and every 1,500 hours after that – to ensure the display cools properly. Check fans more
often if the display is located in a dusty or harsh weather environment. Displays located along gravel
roads will likely require fan checks more often than every 1,500 hours. In addition, monitor the fans if
any area construction projects throw dust and/or dirt into the air.