Daktronics AF-3400-64-R,A - Manual (Page 35)

Maintenance and Troubleshooting
4-7
DS4 Yellow COM1 RxD Flashes when receiving serial information.
DS5 Yellow Light Flashes when receiving signal from light sensor
DS6 Yellow Com 2 RX2 Normal state is ON. When connected to receive RTD
input, the LED will be OFF. The LED flashes when
receiving signal from RTD input device.
Temp Sensor
LED Color Function Operation
DS1 Green +5V On when +5V power supply is functioning.
DS2 Red Run A steady flash indicates the controller is running correctly.
Normal flash rate is about once a second. Flashes faster
when the sensor is transmitting temperature or light
information.
Power Supplies
Reference Drawings:
Schematic, Power Supply Configurations.................... Drawing A-192369
Power Supply Wiring Drawings................................ Refer to Appendix A
The LED power supplies are identified as assemblies in the Power Supply Wiring
Drawings:
1. 0A-1307-0502/0503 for six amber 8x8 modules (12, 4x8 LED boards)
2. 0A-1307-0501 for four amber 8x8 modules (8, 4x8 LED boards)
3. 0A-1307-0511/0512 for four red 8x8 modules (8, 4x8 LED boards)
4. 0A-1307-0500 for two red or amber 8x8 modules (4, 4x8 LED boards)
Complete the following steps to remove a power supply from the display:
1. Open the display as described in Section 4.4.
2. Remove the module directly in front of the failed power supply.
3. Disconnect all the wires connected to the power supply.
4. Remove the hardware holding the power supply in place to free the unit.
5. Follow these steps in reverse order to install a new power supply.
6. Verify power supply voltage.
4.6 Ventilation Systems
Check ventilation fans after 1,500 hours of operation and every 1,500 hours after that
to ensure the display cools properly. Check fans more often if the display is located
in a dusty or harsh weather environment (i.e. along a gravel road with dust laden air).
• 1,500 hours is equivalent to 83 days, if the display operates for 18 hours a
day with the power to the display disconnected when not in use.
• 1,500 hours is equivalent to 62 days, if the display runs non-stop for 24
hours a day.
Attention: Shut off power to the display when it is not in use. Leaving the power on
when the display is not operating exposes electrical components to excess
condensation, which shortens their life.