Daktronics GPR-12EV-RGB - Manual (Page 35)

Diagnostics and Troubleshooting 29
Section 7: Diagnostics and Troubleshooting
This section defines the diagnostic LEDs located on the controller, MLC, and temperature sensor.
Troubleshooting tips are also provided for solving display problems.
7.1 Safety Precautions
Disconnect power when
servicing the display.
Do not modify the display
structure or attach any
panels or coverings to the
display without written
consent of Daktronics.
7.2 Controller
Diagnostics
The controller, shown in
Figure 29, receives
communication from the
computer and sends it to the
MLCs which output it to the
modules. The LEDs on the
controller show whether the
power and communication
signal are working properly.
One or two modules must be
removed to see the
controller. Refer to Section 6:
for instructions on how to
access display interior.
Remember to disconnect
power to the display before
accessing the interior. However, after removing the modules and wires are found to be safe,
power can be turned on to view the diagnostic LEDs.
A steady flash of about once per second on the DS2 “Run” LED indicates that the controller is
working properly. An increased flash rate indicates that the controller is booting.
Figure 29: Controller Component Locations