Daktronics 4000 Series Digital Billboard - Manual (Page 34)

28 Annual Maintenance C hecks
4. Working from top to bottom, use horizontal brush strokes to loosen dirt and grime. Use
light pressure as not to damage LEDs. When finished washing the display face, rinse it
with generous amounts of cold water under low pressure. A spot-free agent, such as Jet
Dry ® , can be used to reduce water spots.
5. Use a soft, dry terry cloth to dry and remove any excess water. Take care not to damage
LEDs by catching the cloth on them.
6. Allow the display to air-dry for one to two hours before applying power to the display.
7. Dispose of any leftover soapy water in an environmentally safe manner.
Dry C leaning Method
1. Clean only a section of modules that are safely within reach of the lift or stage, and then
move on to the next section of modules.
2. Working from top to bottom, rub a dry, soft terry cloth towel horizontally across each
row of LEDs. Make four passes per row of LEDs before moving to the next row of LEDs.
3. Take care not to damage LEDs or the plastic louvers by catching them with the cloth.