Installation Instructions

1X UBS Macro B T S FRU –48 V DC P ower Supply Module (PSM) Shelf
Procedure 10 -2 Installing the replacement –48 V DC PSM shelf (Continued)
3
Reinstall all of the PSMs.
Properly orient each PSM and insert it into the appropriate PSM shelf slot.
Slowly slide the module into the shelf until the rear connectors are fully seated.
Make sure that the PSM is fully engaged with the shelf backplane slot connectors.
4
Using a T25 TORX bit and torque driver , tighten the captive retaining thumbscrews of
each PSM to 2.37 N-m (21 in-lb).
5
Reinstall filler panels over any empty PSM slots of the –48 V DC PSM shelf .
Using a T25 TORX bit and driver , tighten the captive retaining thumbscrew on the filler
panel to 2.37 N-m (21 in-lb).
6
Reconnect all applicable cables to the –48 V DC PSM shelf front panel connectors.
7
Connect the –48 V DC input power cable to the rear of the –48 V DC PSM shelf by mating
the blue connectors.
8
Connect the +27 V DC output power cable on the rear of the PSM shelf to the +27 V DC
input power cable on the rear of the PDU by mating the orange connectors.
9
P ower up the –48 V DC UBS Macro BTS frame according to the section: P ower-up the
Frame on page 2- 3 .
10
Observe the LEDs on the front of the PSMs.
The green LED should be on and the red LED should be off . This indicates normal operation.
There is no optimization required for the PSM shelf replacement.
A T THE OMCR
1 1
Restore site signaling operations according to Procedure 3-3 Restore site signaling
operations procedure for a packet BTS on page 3- 10 .
68P09283A64 -3 10 -7
FOA SEP 2007