Daktronics Galaxy AF-3155, Manual

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The fiber module has three LEDs.
1. The power LED (DS1) should remain lit while power is applied to the
board.
2. The receive LED (DS2) will light when the display fiberboard is accepting
signal from the signal converter at the computer.
3. The transmit LED (DS3) will light when the display fiberboard is sending
back to the signal converter.
In addition, the fiber has several input and output jacks.
1. The transmit, J4 (TX), and receive, J5 (RX), jacks are for the connection
from the signal converter or previous display.
2. There are TX (J2) and RX (J3) jacks for output to a second display.
3. There is a 12VAC power input (J6).
4. The output to the controller is from J7, using an RJ45 cable (Daktronics part
number 0A-1229-0054)
5. The J1 signal out is using when the fiberboard is used in an enclosure
RS422 Surge Suppressor
Figure 42: RS422 Surge Suppressor
To replace the RS422 surge suppression board:
Tools required: 1/8" hex wrench and 3/16" nut
driver
1. Remove the module directly in front of the
surge board.
2. Disconnect the signal connections (refer to
Figure 42
on the right).
3. The surge suppressor is held in place with
four 3/16" screws. Carefully remove them.
4. Install the new surge suppressor, replace
the screws, and reconnect the 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.
Maintenance and Troubleshooting
4-11