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Modem, Modem -9, Figure 41: modem board – Daktronics AF-3197-89-RGB User Manual

Page 53

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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

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