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5 Replacing Components of the BTS3900
1.
2.
Step 6 Activate the BootROM or software version of the new WBBP.
1.
2.
Step 7 On the LMT, run the UBL BRD command to unblock the new WBBP.
----End
Postrequisite
Contact the local Huawei office to handle the faulty WBBP.
5.4 Replacing a UPEU
The UPEU is the power module of the BBU and provides power for the boards in the BBU. The
UPEU supports the -48/+24V V DC input. During the replacement of the UPEU, the BBU is
powered off and the ongoing-services are disrupted.
Prerequisite
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Context
It takes about 10 minutes to replace the board. The duration of the replacement involves the
removal of the cables and the faulty UPEU, the installation of the new UPEU and the cables,
and the time elapsed for the operation of the UPEU.
Take correct ESD prevention measures, such as wearing an ESD wrist strap or ESD gloves, to
avoid static damage to boards, modules, and electronic components.
Procedure
Step 1 Power off the BBU by referring to
Step 2 Remove the cables from the panel of the faulty UPEU.
5-6
On the LMT or M2000 client, run the LST ALMAF command to query active alarms.
If active alarms are reported, clear them according to handling suggestions. If no active
alarm is reported, go to Step 6.
Run the DSP BRDVER command to check whether the BootROM or software version of
the new WBBP is correct.
If the BootROM or software version is incorrect, run the ACT SOFTWARE command to
activate the BootROM or software version of the board.
The number and types of faulty UPEUs are obtained, and new UPEUs are available.
The status of the LEDs on the faulty UPEU and cable connections on the panel are recorded.
The state of the switch on the power board is confirmed.
The required tools and materials such as an ESD wrist strap/ESD gloves and an ESD box/
ESD bag are kept ready.
CAUTION
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Powering Off the
BBU.
BTS3900 WCDMA
Site Maintenance Guide
Issue 07 (2009-08-30)
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