Daktronics AF-3400-133,171,216,260 - Manual (Page 32)

Maintenance and Troubleshooting 4-6
Four diagnostic LEDs are located on the controller; the table below tells what each
LED denotes:
CPU
LED Color Function Operation
DS1 Red CAN TxD Flashes when controller is transmitting CAN information.
DS2 Red CAN RxD Flashes when controller is receiving CAN information.
DS3 Red System Reset Off when controller is functioning properly. Flashes at 1.5-
second rate if controller is not resetting the watchdog timer.
DS4
Red
Run A steady flash indicates the controller is running properly.
Normal flash rate is about once per second.
DS5 Red U15 Programmed On when U15 contains a valid logic program.
DS7 Red Link On when Ethernet interface is in the link-up condition. Flashes
when the Ethernet chip detects transmits or receives activity.
DS8 Red Speed On when the Ethernet interface is at 100Mbps. Off when the
Ethernet interface is at 10Mbps.
DS9 Red Duplex On when the Ethernet interface is at full duplex. Off when the
Ethernet interface is at half-duplex.
DS10 Red Collision Flashes when the Ethernet interface detects a collision in half-
duplex.
DS12 Red +3.3V On when +3.3V power supply is functioning.
DS13 Red +2.5V On when +2.5V power supply is functioning.
Product Board
LED Color Function Operation
DS1 Green +5V On when +5V power supply is functioning.
DS2 Green +3.3V On when +3.3V power supply is functioning.
DS3 Yellow COM1 TxD Flashes when transmitting serial information.
DS4 Yellow COM1 RxD Flashes when receiving serial information.
DS5 Yellow Light Flashed when receiving signal from the light sensor
DS6 Yellow Com 2 RX2 Normal state is ON. When connected to receive RTD input,
the LED will be OFF. The LED flashed when receiving signal
from RTD input device.
Temp/Light 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 temp or light information.
Complete the following steps to remove the controller from the display:
1. Disconnect power from J5.
2. Remove all power and signal connections from the board. “Locked”
connectors are released by pushing apart the latches then carefully pulling
them from the jack. When replacing the board, it is helpful to have the
cables labeled as to which was removed from which connector.
3. Remove each of the six nuts holding the board in place.
4. Follow the previous steps in reverse order to install a new controller board.