Figure 4-5 Positions Of The Components In The Ac/Dc Power Equipment; Figure 4-6 Disconnecting The Cable From The Pdu - Huawei BBU3900 Hardware Maintenance Manual

BBU3900
Hardware Maintenance Guide
l
Procedure
Step 1 Power off the AC/DC power equipment.
Step 2 Wear an ESD wrist strap or a pair of ESD gloves.
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.
Issue 03 (2010-06-05)

Figure 4-5 Positions of the components in the AC/DC power equipment

4
3
2
1
(1) PDU (2) PSU
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.
CAUTION
Disconnect the DC output power cable from the PDU, as shown in

Figure 4-6 Disconnecting the cable from the PDU

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4 Replacing the Components in the OMB
(3) PMU (4) Subrack
Figure 4-6.
4-5