Daktronics Galaxy AF-3165, Manual

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Maintenance and Troubleshooting 41
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 fiberboard is
accepting signal from the computer fiberboard.
The transmit LED (DS3) will light when the
display fiberboard is sending to the computer
fiberboard. 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 fiberboard 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 37 above
for disconnection of power).
2.
The fiber optic board is held in place
with four screws. Carefully remove them.
3.
Install the new fiberboard, replace the screws and reconnect power and signal cables.
RS-422 Surge Suppressor
1.
Disconnect the signal connections (Refer to Figure 38 above).
2.
The surge suppressor is held in place with four screws. Carefully remove them.
3.
Install the new surge suppressor, replace the screws and reconnect power and signal cables.
The surge suppressor is an inline device that is used to filter the RS422 data line. It suppresses
surges down to a low voltage in order to protect the display controller’s RS422 input. The
surge suppressor must be firmly connected to the display chassis in order to be effective. The
mounting hardware used to secure the surge suppressor is sufficient if it is fastened properly.
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 37: Fiber Optic Board
Figure 38: Surge Suppressor, RS422