User Manual

UBS Macro B T S FRU R eplacement Preview Chapter 1: Ov erview
Table 1 -2 FRU replacement conditions and sequence (Continued)
FRU Location Replacement conditions and sequence
Breaker Module
Assembly (BMA)
UBS Macro frame inside
of PDU
1. Shut down signaling to Site and then power down the
frame
2. Replace FRU
3. P ower up the frame
4. Restore signaling to Site
–48 V DC PSM
(P ower Supply
Module) Shelf
UBS Macro frame
1. Shut down signaling to Site and then power down the
frame
2. Replace FRU
3. P ower up the frame
4. Restore signaling to Site
220 V AC PSM
(P ower Supply
Module) Shelf
UBS Macro frame
1. Shut down signaling to Site and then power down the
frame
2. Replace FRU
3. P ower up the frame
4. Restore signaling to Site
–48 V DC or
220 V AC PSM
(P ower Supply
Module)
PSM shelf FRU is hot swappable and redundant .
1. Replace FRU
Optional RGPS
(Remote GPS)
Head
P ole/mast mounted
outdoors
The UBS Macro frame BTS uses one of the following backup
sources instead of the RGPS head:
• Internal Motorola Standard Oscillator (MSO) which
can maintain system timing synchronization for up to
8 hours.
• Optional Quartz High Stability Oscillator (QHSO) which
can maintain system timing synchronization for up to
24 hours.
FRU is hot swappable .
1. Replace FRU
1 -14 68P09283A64 -3
FOA SEP 2007