Replacing The Upeu; Figure 5-6 Position Of The Upeu - Huawei BBU3900 Hardware Maintenance Manual

BBU3900
Hardware Maintenance Guide
4.
Step 10 Take off the ESD wrist strap or gloves, and then pack up all the tools.
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Postrequisite
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5.4 Replacing the UPEU

This describes the Universal Power and Environment Interface Unit (UPEU) board. It is a
mandatory board of the BBU that converts -48 V or +24 V DC to +12 V DC.
Prerequisite
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Context
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Procedure
Step 1 Instruct the M2000 administrator to perform the following operations for the replacement of the
UPEU:
1.
2.
Issue 03 (2010-06-05)
Manually synchronize the inventory information. For details, see the M2000 Operator
Guide.
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 board.
Contact the local Huawei office to handle the faulty board.
The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver,
are ready.
The quantity and type of board to be replaced are confirmed. For details, see
Board Information.
The authorized personnel are permitted to enter the site. The required keys are available.
Figure 5-6 shows the position of the UPEU in the BBU.

Figure 5-6 Position of the UPEU

Replacing the UPEU disrupts the power supply to the BBU, and the services are also
disrupted. Therefore, the UPEU should be replaced within 10 minutes.
Back up the service data or transfer the service carried by the component to be replaced if
required.
Run the BLK CELL command to block all the cells in the base station.
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5 Replacing Components of the BBU3900
UPEU
5.1 Querying
5-7