Daktronics GPR-12EV-RGB - Manual (Page 36)

30 Diagnostics and Troubleshooting
7.3 MLC Diagnostics
Each multi-line controller (MLC) contains
four red diagnostic LEDs, as shown in
Figure 30. When fiber is properly connected,
the LED labeled DS23 (left side) will be off
and the other LEDs will be on
7.4 Temperature Sensor
Diagnostics
If the display includes a temperature sensor,
the temperature sensor board will provide
diagnostic information. The temperature
sensor board, shown in Figure 31, is located
inside the temperature sensor housing
which hangs near the display. A flashing
DS2 LED indicates that unit is sending
temperature information. It also indicates
that the unit has power.
Refer to Appendix B for temperature sensor mounting and
connections.
7.5 Troubleshooting Display Problems
Some common symptoms that may be encountered in a display and
simple steps to resolve them follow. Solutions are organized by
priority, so try them in order.
Troubleshooting may require removing or replacing modules. Refer
to Section 6: for instructions on this procedure. Make sure power
and signal cables are reconnected correctly and latches are tightly
closed when replacing modules.
Consult the Venus ® 1500 software Help file when content problems (including brightness,
message, temperature, and testing) occur. Click the Application button in the top left corner
of the Venus ® 1500 Home page and click Help.
Module and LED problems
One or more LEDs will not light
• Check/replace ribbon cables on the module.
• If that does not help, the module may need to be replaced.
Figure 30: MLC Diagnostic LEDs
Figure 31: Temperature
Sensor Board