Daktronics 4200 Series Digital Billboard - Manual (Page 31)

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Section 8: Multi-Direction Light Sensor Testing and
Replacement
8.1 Troubleshooting Multi-Direction Light Sensor (MDLS) Issues
There a few crucial things to check if there are issues with the MDLS. The table below lists the
crucial items to check if there are issues with the MDLS.
Item Image
If there is a splice cable
attached, inspect the splice
cable connection.
Inspect the MDLS windows
for cleanliness.
Check the connections at
the back of the display to
make sure they are secure.
Inspect the cable from
the back of the display to
the MDLS for damage. If
needed, order a replacement
cable.
Inspect the cable going into
the bottom of the MDLS to
see if it was pulled loose.
8.2 MDLS Testing
To test a MDLS, cover it with a piece of heavy cloth. The display should dim within a couple of
minutes. Remove the fabric and verify the display returns to the brighter setting. If possible, work
with the help desk and have them monitor the display IDM dimming levels.
Multi-Direction Light Sensor Testing and Replacement