Replacing Components Of The Bbu3900 - Huawei BBU3900 Hardware Maintenance Manual

BBU3900
Hardware Maintenance Guide
5

Replacing Components of the BBU3900

About This Chapter
This describes how to replace components of the BBU. The components are the BBU case,
boards and module of the BBU, and optical modules.
5.1 Querying Board Information
Before replacing a board, you need to query the board information at the remote end to confirm
the type of board to be replaced.
5.2 Replacing the BBU in the 19-Inch Cabinet
This chapter describes how to replace the BBU in a 19-inch cabinet, such as in an APM30 or
TMC.
5.3 Replacing the WMPT
The WCDMA Main Processing & Transmission unit (WMPT) processes signals and manages
resources on other boards.
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.
5.5 Replacing the UEIU
The Universal Environment Interface Unit (UEIU) provides channels for transmitting the
monitoring signals from the service board to the BBU.
5.6 Replacing the FAN Unit
The FAN unit is located in the BBU. The unit and the air inlet box form a ventilation loop, which
ensures ventilation and heat dissipation. Replacing the FAN unit may lead to overtemperature
alarms due to interruption of heat dissipation in the BBU. The services, however, are not affected.
5.7 Replacing the UTRP
The Universal Transmission Processing unit (UTRP) is the BBU transmission extension board.
Replacing the UTRP may disrupt all the services carried on the base station.
5.8 Replacing the USCU
The Universal Satellite card and Clock Unit (USCU) in the BBU receives clock signals such as
the GPS, RGPS, BITS, and M-1PPS signals. In addition, it transmits or receives 1PPS+TOD
clock signals.
Issue 03 (2010-06-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5 Replacing Components of the BBU3900
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