Daktronics AB-1600-1.5,2.5 - 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.