Figure 4-17 Disconnecting Cables; Figure 4-18 Removing The Ac Surge Protection Box - Huawei BBU3900 Hardware Maintenance Manual

4 Replacing the Components in the OMB

Figure 4-17 Disconnecting cables

Step 5 Loosen the M4 screw on the panel, and then remove the AC surge protection box, as shown in
Figure

Figure 4-18 Removing the AC Surge Protection Box

Step 6 Install the new AC surge protection box, tighten the screw on the panel until the tightening torque
reaches 1.2 N·m, and then reconnect the cables.
Step 7 Power on the base station.
Step 8 Take off the ESD wrist strap or gloves, and then pack up all the tools.
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4-18.
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Copyright © Huawei Technologies Co., Ltd.
BBU3900
Hardware Maintenance Guide
Issue 03 (2010-06-05)