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Modem Boards Chapter 8: DMI R eplacement Procedures
Procedure 8 -4 R eplacing a Modem Board (Continued)
22
Install the replacement modem board into Modem 1 position of the DMI assembly by
performing the following:
1. Carefully place the front edge of Modem 1 under the lip of the DMI front panel.
2. Align the modem-to-controller connector halves so that they will mate together .
3. Press down firmly on the modem just above the modem-to-controller connector until
the connector halves are fully seated.
4. Using a T20 TORX bit and torque driver , tighten the seven captive screws that retain
Modem 1 to the DMI assembly . Tighten the screws to 1.6 - 1.8 N-m (14 - 16 in-lb).
5. A fter tightening the screws, firmly squeeze the modem connectors together to make
sure that it is well seated. This may help prevent problems/errors that may not be
visible from the OMCR.
23
A fter Modem 1 is replaced, go to step 30 .
24
P osition the DMI assembly on its side with the front panel handle at the bottom (see
Figure 8-4 ).
25
Remove Modem 2 from the DMI assembly by performing the following:
1. Use a T20 TORX bit/driver to completely loosen the seven captive screws that retain
Modem 2 to the DMI assembly .
2. Grasp the modem extraction handle with one hand and hold the assembly down with
the other hand.
3. Pull up on the modem extraction handle until the modem-to-controller connector
disengages.
4. Carefully lift Modem 2 out of the DMI assembly .
26
Install the replacement modem board into Modem 2 position of the DMI assembly by
performing the following:
1. Carefully place the Modem 2 in the rear half of the DMI assembly .
2. Align the modem-to-controller connector halves so that they will mate together .
3. Press down firmly on the modem just above the modem-to-controller connector until
the connector halves are fully seated.
4. Using a T20 TORX bit and torque driver , tighten the seven captive screws that retain
Modem 2 to the DMI assembly . Tighten the screws to 1.6 - 1.8 N-m (14 - 16 in-lb).
5. A fter tightening the screws, firmly squeeze the modem connectors together to make
sure that it is well seated. This may help prevent problems/errors that may not be
visible from the OMCR.
27
Insert the DMI assembly and the failed modem board into ESD containers. Transport both of
these items to the BTS site.
Continued
8 -26 68P09283A64 -3
FOA SEP 2007