Replacing The Ac Surge Protection Box - Huawei BBU3900 Hardware Maintenance Manual

4 Replacing the Components in the OMB
Step 6 Install the new DCDU-03B, tighten the screws on the DCDU-03B until the tightening torque
reaches 2 N·m, and then reconnect the cables.
Step 7 Power on the DCDU-03B.
Step 8 Take off the ESD wrist strap or gloves, and then pack up all the tools.
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Postrequisite
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4.4 Replacing the AC Surge Protection Box

The AC surge protection box provides protection for the AC input power.
Prerequisite
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Context
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4-12
Place the replaced component into the ESD box or bag. Then, place the ESD box or bag
into a carton padded with foam or into the packing box of the new component.
Fill in the fault form with the details of the replaced component.
Contact the local Huawei office to handle the faulty component.
The tools and materials, such as an ESD wrist strap or ESD gloves and M4 screwdriver,
are ready.
The quantity and type of AC surge protection box to be replaced are confirmed, and the
new AC surge protection box is ready.
The authorized personnel are permitted to enter the site. The required keys are available.
Figure 4-16 shows the position of the AC surge protection box in the OMB.
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Copyright © Huawei Technologies Co., Ltd.
BBU3900
Hardware Maintenance Guide
Issue 03 (2010-06-05)