Huawei BBU3900 - Maintenance Items; Powering On and Off

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Figure 4-13 Position of the DCDU-03B

DCDU

l Replacing the DCDU-03B disrupts all the services carried by the base station. Therefore,

the DCDU-03B should be replaced within 20 minutes.

Procedure

Step 1 Power off the DCDU-03B.

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 board to be replaced.

Step 4 Disconnect the power cables from the DCDU-03B, as shown in Figure 4-14.

4 Replacing the Components in the OMB

BBU3900

Hardware Maintenance Guide

4-10 Huawei Proprietary and Confidential

Issue 03 (2010-06-05)

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