Installation Instructions

1X UBS Macro B T S FRU Modem Boards
Procedure 8 -4 R eplacing a Modem Board (Continued)
15
ESD handling precautions must be adhered to when handling the DMI assembly .
Place the affected DMI assembly into an ESD container .
16
Transport the affected DMI assembly in its ESD container and the needed replacement
modem board in its ESD container to the DMI preparation area.
IN THE DMI PREP ARA TION AREA
17
ESD handling precautions must be adhered to when handling and working on the
DMI assembly or the modem boards. All work performed on the DMI assembly and
modem boards must be done in an ESD protected work area.
Set the affected DMI assembly in its ESD container and the replacement modem board in its
ESD container onto a clean, ESD protected surface.
18
Remove the DMI assembly and the replacement modem board from the ESD containers.
Retain the ESD containers for later reuse.
19
If replacing Modem 1, go to step 20 .
If replacing Modem 2, go to step 24 .
20
P osition the DMI assembly on its side with the front panel handle at the top (see Figure 8-3 ).
21
Remove Modem 1 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 1 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 1 out of the DMI assembly .
Continued
68P09283A64 -3 8 -25
FOA SEP 2007