User Guide

Table Of Contents

4 Replacing an AAU

This section describes how to replace a faulty AAU. Replacing an AAU interrupts all the services

carried by the AAU and causes alarms.

Prerequisites

l The following tools and materials are available: an ESD wrist strap or a pair of ESD gloves,

a flat-head screwdriver, a Phillips screwdriver, a torque screwdriver, a hex key, and an ESD

box or bag.

l The new component is intact, and its hardware version is the same as that of the component

to be replaced.

Procedure

Step 1 Put on an ESD wrist strap or ESD gloves.

NOTICE

Take proper ESD protection measures, for example, put on an ESD wrist strap or ESD gloves,

to prevent electrostatic damage to the boards, modules, or electronic components.

Step 2 Instruct the U2000 administrator to block the faulty AAU by running the BLK BRD command.

Step 3 Power off the AAU. For detailed operations, see 3.2 Powering off an AAU.

Step 4 Remove cables from the faulty AAU.

1. Optional: If the AAU is installed on a pole top, remove the landscaping cover, as shown

in the following figure. Skip this step if the AAU is installed on a pole or wall.

AAU3940

Hardware Maintenance Guide

4 Replacing an AAU

Issue 01 (2015-01-15) Huawei Proprietary and Confidential