Daktronics Galaxy AF-3190 Series, Руководство пользователя, Страница: 53 / 97

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, and then carefully
pulling them from the jack. When replacing the board, it is helpful to have
the cables labeled for easier replacement.
3. Remove each of the six screws holding the board in place.
4. Follow the previous steps in reverse order to install a new controller board.
Modem
Reference Drawings:
Enclosure Controller M2; Modem ................................ Drawing A-177916
If a modem was included with the display, it is located inside the display next to the
controller board. Refer to
Drawing A-177916 for modem location.
Figure 41: Modem Board
1. To replace a modem, first disconnect the
power and signal connections (refer to
Figure 41
for the location of the
connectors).
2. The modem is held in place with four
screws. Remove the screws with a 3/16”
nut driver and lift the modem out of the
display.
3. Install the new modem, replace the
screws, and reconnect power and signal
cables.
The modem module has 4 LEDs.
1. The power LED should remain lit while
power is applied to the modem.
2. The modem RX and TX will flash when communicating.
3. The carrier detect LED will light when the modem has established
communication to another modem.
The modem board also has several input and output jacks:
1. J3 is the power input for 12VAC
2. TB2 is a phoenix connector to terminate the Tip and Ring wires
3. J5 is an RJ11 jack for termination of a pre-terminated phone line
4. J6 is the RS232 RJ45 output to the controller
5. J2, TB1, and TB3 are not used in this display application
A modem system requires the X1 jumper to be closed on the controller board. Refer
to
Figure 42
for the jumper location.
Maintenance and Troubleshooting
4-9