4
Replacing an RRU
A distributed base station consists of RRUs and a BBU. Replacing an RRU interrupts all the
services carried by the RRU, and alarms are generated.
Prerequisite
l
The test UE communicates with the base station properly.
l
The types of faulty RRUs are confirmed as follows:
–
If RRUs can be queried online, run the
DSP BRDMFRINFO
command on the LMT
to query the electronic labels of the RRUs.
–
If RRUs cannot be queried online, the information about the RRUs can be queried offline
on the M2000. For details, see the procedure for querying inventory data in the M2000
documentation.
l
Tools and materials, such as ESD gloves, M4 Phillips screwdrivers, M6 Phillips
screwdrivers, waterproof tape, and PVC insulation tape, are ready.
l
The number and type of RRUs to be replaced are confirmed, and new RRUs are ready.
Procedure
Step 1
Run the
BLK BRD
command to block the RRU.
Step 2
Power off the RRU by referring to
.
Step 3
Wear ESD gloves.
CAUTION
l
Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic
damage to the boards, modules, or electronic components.
l
Pay attention to the high temperature while replacing an RRU without housing.
Step 4
Loosen the six screws on the cover plate of the RRU cabling cavity using an M4 Phillips
screwdriver, and then open the cover plate.
Step 5
Record all the cable connections on the panel of the module to be replaced.
RRU3203
Hardware Maintenance Guide
4 Replacing an RRU
Issue 04 (2011-09-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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