Product Info

1X UBS Macro B T S FRU Modem Boards
Procedure 8 -4 R eplacing a Modem Board (Continued)
A T THE BTS SITE
28
ESD handling precautions must be adhered to when handling the DMI assembly .
Plug the end of the ESD wrist strap into the UBS Macro BTS frame ESD jack This jack is
located in the middle of the upper XMI shelf bracket. A ttach the wrist strap to your wrist.
29
Remove the DMI assembly from the ESD container .
30
Install the DMI assembly with replacement modem into its housing in the UBS Macro BTS
frame by performing the following:
1. P osition the DMI assembly on bottom edge so that the front panel handle is on the right
and the 1/4-turn retaining fastener is at the top.
2. Pick up the DMI assembly with two hands.
3. Insert the rear of the DMI assembly into its housing.
4. Slide the DMI assembly completely into the housing.
5. Turn the 1/4-turn retaining fastener one-quarter turn CW (Clockwise) to secure the
DMI assembly in the housing.
31
Reconnect all of the cables to the corresponding connectors on the DMI front panel.
32
P ower up the DMI by setting the corresponding PDU DMI 20A circuit breaker to the on
position (pushed in).
A T THE OMCR
33
F or a UBS Macro BTS equipped with one DMI, go to step 34 .
F or a UBS Macro BTS equipped with more than one DMI, go to step 35 .
34
Restore site signaling operations according to Procedure 3-3 Restore
site signaling operations procedure for a packet BTS on page 3- 10 .
A fter this step is completed, go to step 25 .
35
Unlock the affected DMI by entering the following command at the prompt:
omc-000000> UNLOCK DMI-<bts#>-<dmi#>- UNC
A T THE BTS SITE
36
P erform the recommended optimization and testing on the UBS Macro BTS frame (see
Optimization Recommended on page 8- 29 ).
37
Return the failed modem board in its ESD container to Motorola for repair .
Reference Diagrams
The following diagrams are used to aid the modem board replacement procedure.
68P09283A64 -3 8 -27
FOA SEP 2007