Daktronics Galaxy AF-3155, Manual

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Maintenance and Troubleshooting
4-15
•
Water Intrusion – Water Stain Marks
Water can enter the display where weather stripping has come loose or
deteriorated or where fasteners have come loose allowing gaps in the panels
or where moisture may be entering around hardware. Be sure to check
around the lift eyes and bolts to ensure that water has not entered there. If
so, replace hardware immediately to prevent more water from entering the
display. Also, check electronic components for possible corrosion.
•
Corrosion
Check the paint, and look for possible corrosion especially at footings,
structural tie points, and ground rods.
If any of the above conditions are noticed, action must be taken to correct the
situation
.
4.9 Troubleshooting
This sub-section contains some symptoms that may be encountered in the displays.
This list does not include every possible symptom, but does represent common
situations that may occur.
Symptom/Condition Possible Cause/Remedy
One or more LEDs on a single
module fail to light.
•
Replace/check ribbon cables on the
module.
•
Replace the module.
One or more LEDs on a single
module fail to turn off.
•
Replace/check ribbon cables on module.
•
Replace the module.
A section of the display is not
working. The section extends
all the way to the right side of
the display.
•
Replace/check the ribbon cable.
•
Replace the first module/driver on the left
side of the first module that is not working.
•
Replace the second module that is not
working.
•
Replace the power supply assembly on
the first module that is not working.
One row of modules does not
work or is distorted.
•
Replace/check ribbon cable to and from
first non-working module.
•
Check for bent pins on module and
controller.
•
Replace/move first module.
•
Replace controller.
A group of modules, (a column
of block) which share the same
power supply assembly, fail to
work.
•
Check the voltage to the module.
•
Check the wire connections at the power
supply and at the module.
•
Replace the power supply assembly.