Figure 8-22 Removing plastic screws
Step 3 Install a fastening bar on the top of the cabinet, and then use a socket wrench to tighten the two
M12×30 bolts, as shown in Figure 8-23.
Figure 8-23 Installing a fastening bar
(1) Fastening bar
Step 4 Lift the cabinet onto the trapezoidal rack, use four M12×30 bolts to secure the cabinet on the
trapezoidal rack, and then use a socket wrench to tighten the bolts, as shown in Figure 8-25.
CAUTION
Do not move the cover plates for the round cable holes to avoid entry of water into the cabinet.
Figure 8-24 shows the positions of the cover plates for the round cable holes.
DBS3900 (Ver.B)
Installation Guide
8 Outdoor Scenario with DC Power Supply (BBU Installed
in a +24 V DC APM30H)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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