Maintenance and Troubleshooting
17
Pressure Wash Cleaning Method
Cleaning supplies:
• Pressure washer rated for 1,500 psi or less
•
45° (or more) spray nozzle
Cleaning process:
1.
Turn off power to the DMS.
2.
Spray face and sides of the DMS. Keep the nozzle of the pressure washer at least 2'
away from the display.
LEDs
When necessary, clean the LEDs with a damp cloth, a soft brush, or an anti-static,
polycarbonate-type cleaner applied to a damp cloth. Do not spray the cleaner directly
onto the LEDs.
LED and Electronic Circuitry
Test LED and electronic circuitry at intervals determined by customer requirements.
Daktronics recommends performing the tests at least monthly. Perform tests on the DMS
to check for hardware problems and incorrect variable settings.
1.
Connect to the Vanguard
®
Field Controller and establish communication with the
display.
2.
Check that the temperature levels shown on the Sign Status screen of the Sign
Control tab are the appropriate values for both internal and external temperature.
3.
Perform a diagnostics test and check that all the power supplies and other
configured peripherals pass.
4.
Make sure the photocell readings are appropriate for the current conditions.
5.
Perform a pixel test and replace faulty modules.
Note:
Use caution along areas of the display that contain seams, weather
stripping, or silicone. Ensure the pressure washer does not peel or rip any
sealing material.
Note:
The following tests display functions, not other DMS equipment hardware.
Note:
Ground meters for this test are available for purchase from Daktronics.
