Daktronics AF-3090-89-R,A - Manual (Page 32)

Maintenance &
Troubleshooting
4-7
Fiber Board
The fiber module has three LEDs. The
power LED (DS1) should remain lit while
power is applied to the module. The
receive LED (DS2) will light when the
display fiber board is accepting signal
from the computer fiber board. The
transmit LED (DS3) will light when the
display fiber board is sending to the
computer fiber board. In addition, the
fiber module has two input fiber
connectors, which the computer or the
previous display connects to, and two
output fiber connectors that connect to the
next display. The fiber board connects to
the controller board with a small DB9
adapter and straight through RJ11 cable.
To replace a fiber optic board:
1. Disconnect the power and signal
connections (refer to Figure 23 for
disconnection of power).
2. The fiber optic board is held in place with four screws. Carefully remove them.
3. Install the new fiber optic board, replace the screws and reconnect power and signal cables.
Power Supplies
The LED power supplies are identified as assemblies 0A-1259-4005 for amber displays and 0A-
1259-4008 for red displays, in the Display Assembly drawings. Each power supply controls two
modules.
Complete the following steps to remove a power supply from the sign:
1. Remove the module directly in front of the failed power supply.
2. Disconnect all the wires connected to the power supply.
3. Remove the hardware holding the power supply in place to free the unit.
4. Follow these steps in reverse order to install a new power supply.
5. Verify power supply voltage
Power
Connection
Signal
Connection
Power LED
Receive LED
Transmit LED
J2 (Tx1)
J3 (Rx1)
J5 (Rx2)
J4 (Tx2)
Output Pair
to Next Sign
Input Pair from
Computer /
Previous Sign
}
}
Figure 23: Fiber Optic Board