NOTICE
When AC 110 V input is used, the AC power module is half-load output, which cannot
support the maximum system power consumption with the full configuration. Therefore,
two AC power modules are required for the device to work properly. If one AC power
module fails, the other cannot support the maximum system power consumption. That is,
1+1 redundancy fails.
Tool
l
ESD wrist strap or ESD gloves
l
Phillips screwdriver
Procedure
Step 1
Check the location of the power module to be replaced.
Before pulling out a power module to be replaced, check its location, that is, the cabinet and
chassis where the power module resides, and label the power module.
Step 2
Switch off the corresponding circuit breaker on the power distribution cabinet. This powers
off the power module to be replaced. In addition, switch off the power module to be replaced
Step 3
Put on the ESD wrist strap and connect the grounding terminal to the ESD jack on the rack.
Step 4
Remove the cables from the power module to be replaced, as shown in
(1).
Step 5
Replace the power module as follows:
l
Replace the R4850G2 power module.
a.
Disconnect the buckle in the upper right of the power module and lower the ejector
lever on the right. Holding the ejector lever, remove the power module from the
slot.
Figure 3-37
Removing an R4850G2 power module on the USG9520
33
2
11
HUAWEI USG9500 Series
Hardware Guide
3 Hardware Maintenance
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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