Huawei BBU3900 - Figure 4-5 Positions of the Components in the AC;DC Power Equipment; Figure 4-6 Disconnecting the Cable from the PDU

Figure 4-5 Positions of the components in the AC/DC power equipment
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3
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(1) PDU (2) PSU (3) PMU (4) Subrack
l Replacing the AC/DC power equipment, PSU, PDU, or subrack disrupts all the services
carried by the base station. Therefore, the components should be replaced in 20 minutes.
Procedure
Step 1 Power off the AC/DC power equipment.
Step 2 Wear an ESD wrist strap or a pair of ESD gloves.
CAUTION
Take proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESD
gloves, to prevent electrostatic damage to the boards, modules, or electronic components.
Step 3 Record all the cable connections on the panel of the component to be replaced.
Step 4 Disconnect the cables.
1. Disconnect the DC output power cable from the PDU, as shown in Figure 4-6.
Figure 4-6 Disconnecting the cable from the PDU
BBU3900
Hardware Maintenance Guide 4 Replacing the Components in the OMB
Issue 03 (2010-06-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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