Product Info

1X UBS Macro B T S FRU P ower Distribution Unit (PDU)
T o replace the PDU perform Procedure 9 -1 and then Procedure 9 -2 .
Procedure 9 -1 R emo ving the failed PDU
A T THE OMCR
1
Shut down site signaling functions according to Procedure 3-2 Shutdown site signaling
functions procedure for a packet BTS on page 3- 5 .
A T THE BTS SITE
2
P ower down the UBS Macro BTS frame according to the section: P owering Down the
Frame on page 2- 3 .
Mak e sure the facilit y circuit break er controlling external AC or DC power , whichev er
is applicable, to the UBS Macro B T S fr ame is set to the OFF position.
Y ou will be disconnecting multiple cables from connectors. If necessary , use
masking tape and a marker and temporarily tag each cable as to the proper
connector before disconnection.
3
Disconnect the +27 V DC output power cable from the +27 V DC input power cable on the
rear of the PDU by separating the orange connectors.
4
Disconnect all of the cables connected to the PDU front panel connectors.
5
If UBS Macro BTS frame is equipped with carrier strips go to step 6 .
If UBS Macro BTS frame is not equipped with carrier strips go to step 7 .
6
Remove the carrier strips from the frame as follows:
• Using a 10 mm socket and ratchet, loosen and remove the 8 nuts that secure each
carrier strip to the frame.
• Remove the carrier strip.
7
Loosen the two rack mounting screws in the keyhole slots of the PDU rack mounting flanges.
Do not remove these two screws. Leave the screw heads extending 8 mm out from the rack
surface. These two screws will serve as hanger screws.
8
Completely loosen and remove the remaining two rack mounting screws in the PDU rack
mounting flanges.
9
Grasp the PDU and lift it up and off of the hanger screws. Pull the PDU out of the rack
and set it out of the way .
68P09283A64 -3 9 -5
FOA SEP 2007