Daktronics AF-3020-7.6-R,A - Manual (Page 27)

Figure 18: Surge Protector, RS422
Surge Suppressor, RS422
1. Disconnect the signal
connections (Refer to Figure
18).
2. The surge suppressor is held in
place with four screws.
Carefully remove them.
3. Install the new surge
suppressor, replace the screws
and reconnect power and
signal cables.
The surge suppressor is an inline device that is used to filter the RS422 data line. It suppresses
surges down to a low voltage in order to protect the display controllers RS422 input. The surge
suppressor must be firmly connected to the display chassis in order to be effective. The mounting
hardware used to secure the surge suppressor is sufficient if it is fastened properly.
4.8 Structural Inspection
Visual inspection should be done annually to check paint and look for possible corrosion, especially
at footings, structural tie points and ground rods. Fasteners should be checked and tightened or
replaced as required.
At least once a year, check the inside of the display for signs of water intrusion, i.e.; water stain
marks. Water can enter a display where weather stripping has come loose or deteriorated, where
fasteners have come loose allowing gaps in the panels or where moisture may be entering around
hardware. Check the electronic components for signs of corrosion.
Maintenance & Troubleshooting 4-5