Daktronics AB-1600-1.5,2.5 User Manual
Page 64
Maintenance & Troubleshooting
4-28
4.24
Troubleshooting Checklist – Data Distributor Displays
If the display has a data distributor, the following table covers a few possible problems that you may
encounter while operating the display, along with a cause/solution. While this list does not cover
every possible problem, it does list those that are most likely to occur.
Problem
Possible Cause/Solution
One or more lamps will not light.
•
=
Replace the lamp.
•
=
Replace the socket.
•
=
Replace the lampbank
One or more lamps will not turn off.
•
=
Check for metallic foreign objects on
the lampbank causing a short.
•
=
Check for foreign objects on PC
board.
•
=
Replace the lampbank
All of one row of modules across the
entire display is not working.
•
=
Check output card at data distributor.
•
=
Replace output card at data
distributor.
•
=
Check signal cables to first column
director in that row.
•
=
Replace column director.
A section of the display is not working
(multiple rows in a group up to 4
modules long.)
•
=
Check signal cables to the column
director for that section.
•
=
Replace the column director.
A row of modules up to 4 modules long
is not working.
•
=
Check the signal cable to the line
controller in that row.
•
=
Replace the line controller.
Garbled display or shifted sequence.
•
=
Check RJ45 network cable.
•
=
Check output on data distributor
output card.
•
=
Set computer and line receiver to high
line feed.
Single module does not work
•
=
Check signal connection (ribbon
cable).
•
=
Check power connections.
•
=
Check appropriate breaker in
panelboard.
•
=
Check in-line transformer fuse.
•
=
Replace lampbank.
Entire display does not respond to any
source of data.
•
=
Check clear LED on receiver board (if
red, data distributor is not getting
signal)
•
=
Controller may be off
•
=
Fiber optic connection may be bad or
broken
Display works for a short time and then
blanks.
•
=
Check that all fans are operational
and running at full RPM.
•
=
Check that filters are not plugged and
limiting airflow.