bbu3900 hardware maintenance guide(v200_08)(pdf)-en

8/10/2019 BBU3900 Hardware Maintenance Guide(V200_08)(PDF)-En

http://slidepdf.com/reader/full/bbu3900-hardware-maintenance-guidev20008pdf-en 1/72

BBU3900

V200

Hardware Maintenance Guide

Issue 08

Date 2011-08-30

HUAWEI TECHNOLOGIES CO., LTD.



Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within the

purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 08 (2011-08-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

http://www.huawei.com/



About This Document

Introduction

This document describes the routine hardware maintenance of the BBU3900. The maintenancetasks consist of power supply and grounding system maintenance, cabinet maintenance, and

power-on and power-off operations. This document also describes the procedures for replacing

the components.

Product Version

The following table lists the product versions related to this document.

Product Name Product Version

BBU3900 V200R010

V200R011

V200R012

Intended Audience

This document is intended for:

l Field engineers

l System engineers

Organization

1 Changes in the BBU3900 Hardware Maintenance Guide

This describes the changes in the BBU3900 Hardware Maintenance Guide

2 Maintenance Items for the BBU3900

BBU3900

Hardware Maintenance Guide About This Document



ii



The maintenance items for the BBU3900 are fans, equipment surface, equipment cleanliness,

indicators, and ambient temperature.

3 Powering On/Off the BBU3900

This describes how to power on and power off the BBU3900. During power-on, you need tocheck the status of the LEDs on the BBU3900. The power-off procedure for an emergency is

different from power-off in a normal situation.

4 Replacing the Components in the OMB

This chapter describes how to replace the components in the Outdoor Mini Box (OMB), such

as the BBU, HEUA, AC/DC power equipment, DCDU-03B, and AC surge protection box.

5 Replacing Components of the BBU3900

This section describes how to replace components of the BBU, including BBU case, BBU boards

and modules, and optical modules.

6 Adding Components in the BBU3900

During the maintenance of the baseband unit (BBU), some boards may be added, such as a

universal power and environment interface unit (UPEU) or a WCDMA Baseband Process Unit

(WBBP).

7 Replacing SLPU Components

During the SLPU maintenance, the SLPU components, such as the SLPU case, UELP, and

UFLP, can be replaced as required

Conventions

Symbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol Description

Indicates a hazard with a high level of risk, which if not

avoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, which

if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if not

avoided, could result in equipment damage, data loss,

performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or save

time.

Provides additional information to emphasize or supplement

important points of the main text.

General Conventions

BBU3900




iii



The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

The command conventions that may be found in this document are defined as follows.


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated by

vertical bars. A minimum of one item or a maximum of all

items can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated by

vertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.


Boldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK .

> Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder.

Keyboard Operations

BBU3900




iv



The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means

the two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

BBU3900




v



Contents

About This Document.....................................................................................................................ii

1 Changes in the BBU3900 Hardware Maintenance Guide......................................................1

2 Maintenance Items for the BBU3900..........................................................................................4

3 Powering On/Off the BBU3900...................................................................................................6

3.1 Powering On the BBU........................................................................................................................................7

3.2 Powering Off the BBU.......................................................................................................................................8

4 Replacing the Components in the OMB...................................................................................9

4.1 Replacing the HEUA........................................................................................................................................10

4.2 Replacing the AC/DC Power Equipment.........................................................................................................12

4.3 Replacing the DCDU-03B................................................................................................................................17

4.4 Replacing the AC Surge Protection Box..........................................................................................................20

5 Replacing Components of the BBU3900.................................................................................245.1 Query Electronic Label of the Board................................................................................................................26

5.2 Re placing the BBU in the 19-Inch Cabinet......................................................................................................26

5.3 Replacing the WMPT.......................................................................................................................................28

5.4 Replacing the UPEU.........................................................................................................................................30

5.5 Replacing the UEIU..........................................................................................................................................32

5.6 Replacing the FAN Unit...................................................................................................................................34

5.7 Re placing the UTRP.........................................................................................................................................36

5.8 Replacing the USCU........................................................................................................................................38

5.9 Replacing the WBBP........................................................................................................................................405.10 Replacing the Optical Module........................................................................................................................42

6 Adding Components in the BBU3900......................................................................................45

6.1 Adding a UPEU................................................................................................................................................46

6.1.1 Adding a UPEUc.....................................................................................................................................46

6.1.2 Adding a UPEUc to Replace the UEIU...................................................................................................47

6.1.3 Adding two UPEUc Boards to Replace the UEIU and UPEUa..............................................................49

6.1.4 Adding two UPEUc Boards to Replace Two UPEUa Boards.................................................................53

6.2 Adding a WBBP...............................................................................................................................................56

7 Replacing SLPU Components...................................................................................................58

BBU3900

Hardware Maintenance Guide Contents



vi



7.1 Replacing the SLPU.........................................................................................................................................59

7.2 Replacing the UELP.........................................................................................................................................60

7.3 Replacing the UFLP.........................................................................................................................................62

BBU3900

Hardware Maintenance Guide Contents



vii



1 Changes in the BBU3900 Hardware

Maintenance Guide

This describes the changes in the BBU3900 Hardware Maintenance Guide

08 (2011-08-30)

This is the seventh commercial issue.

Compared with issue 07 (2011-05-30), no information is added.

Compared with issue 07 (2011-05-30), this issue incorporates the following changes:

Topic Change Description

5 Replacing Components of the BBU3900 The operations performed on the M2000 are

changed.

Compared with issue 07 (2011-05-30), no information is deleted.

07 (2011-05-30)

This is the sixth commercial issue.




5.3 Replacing the WMPT The operations for loading and activating the

WMPT software are modified.


BBU3900

Hardware Maintenance Guide 1 Changes in the BBU3900 Hardware Maintenance Guide



1



06 (2011-03-30)

This is the fifth commercial issue.




5.2 Replacing the BBU in the 19-Inch

Cabinet

l The operation for blocking cells during

the WMPT replacement is added.

l The operations for loading and activating

the WMPT software are modified.

l The operations performed on the M2000

and LMT are differentiated.


05 (2011-02-15)

This is the fourth commercial issue.



Topic Change Description5.1 Query Electronic Label of the Board The title is changed.

5 Replacing Components of the BBU3900 l The confirmation of the type of board in

Prerequisites is modified.

l The name of the document used as a

reference for manually synchronizing

inventory data is modified.


04 (2010-12-30)

This is the third commercial issue.




5.10 Replacing the Optical Module Some descriptions are optimized.

BBU3900




2




03 (2010-06-05)

This is the second commercial issue.




5.4 Replacing the UPEU Some descriptions are optimized.

5.3 Replacing the WMPT

5.9 Replacing the WBBP


02 (2010-03-05)

This is the first commercial issue.

Compared with issue 01 (2008-12-30), this issue includes the following new topics:

l 4.1 Replacing the HEUA

l 4.2 Replacing the AC/DC Power Equipment

l 4.3 Replacing the DCDU-03Bl 4.4 Replacing the AC Surge Protection Box

Compared with issue 01 (2008-12-30), no information is changed.


01 (2008-12-30)

This is the initial field trial issue.

BBU3900




3



2 Maintenance Items for the BBU3900

The maintenance items for the BBU3900 are fans, equipment surface, equipment cleanliness,

indicators, and ambient temperature.

Table 2-1 describes the maintenance items for the BBU3900.

Table 2-1 Maintenance items for the BBU3900

Item Checking Frequency

Description Reference Standard

Fans Weekly,

monthly, or

quarterly

Check the fans. No alarm related to the fans

is generated.

Check the

ventilation of

the BBU.

Quarterly Check the air intake

vents and air exhaust

vents of the BBU and the

rack and cabinet housing

the BBU.

The air intake vents and air

exhaust vents are clear. If

much dirt is on the air intake

vents and air exhaust vents,

maintenance personnel must

clean the vents.

Check the

equipment

surface.

Monthly or

quarterly

Check whether the

surface of the equipment

is intact and whether the

labels on the equipment

are legible.

None.

Check the

equipment

cleanliness.

Monthly or

quarterly

Check whether the

equipment is clean.

The surface and inside of the

equipment are clean.

Check the

indicators.

Monthly or

quarterly

Check whether the

indicators on the

equipment are

functional.

No indicator indicates

alarms.

BBU3900

Hardware Maintenance Guide 2 Maintenance Items for the BBU3900



4



Item Checking Frequency

Description Reference Standard

Check the

ambient

temperature in

the cabinet.

Monthly or

quarterly

Check whether the

temperature in the

cabinet is normal.

The ambient temperature of

the BBU3900 must range

from –20°C to +55°C.

NOTE

The maintenance period is determined as required.

BBU3900

Hardware Maintenance Guide 2 Maintenance Items for the BBU3900



5



3 Powering On/Off the BBU3900

About This Chapter

This describes how to power on and power off the BBU3900. During power-on, you need to

check the status of the LEDs on the BBU3900. The power-off procedure for an emergency is

different from power-off in a normal situation.

3.1 Powering On the BBU

Before powering on the BBU, set the power switch on the BBU to ON and determine the

operational status of the BBU based on the status of the LEDs.

3.2 Powering Off the BBU

The BBU power-off is classified into normal power-off and emergency power-off.

BBU3900

Hardware Maintenance Guide 3 Powering On/Off the BBU3900



6



3.1 Powering On the BBUBefore powering on the BBU, set the power switch on the BBU to ON and determine the

operational status of the BBU based on the status of the LEDs.

Prerequisite

l The hardware and cables of the BBU are installed.

l The voltage of the external input power ranges from -38.4 V DC to -57 V DC or +21.6 V

DC to +29 V DC.

Procedure

Step 1 Power on the BBU by setting its power switch to ON.

Step 2 Check the status of the three LEDs on the BBU panel, namely RUN, ALM, and ACT, and then proceed with the subsequent operations based on the status of the LEDs.

If... Then...

l The RUN LED is blinking (on for one

second and off for one second),

l The ALM LED is off for one second.

l The ACT LED is on.

The board is working normally. Go to Step

3.

l The RUN LED is on,

l The ALM LED is on,

l The ACT LED is off,

The board is not working properly. Rectify

the fault as follows:

l Verify that the power cable is securelyconnected.

l Reset the board.

l Remove the board and check whether

there are damaged pins. If there are

damaged pins, replace the board. If there

is no damaged pin, reinstall the board.

Check the LEDs. If the status of the LEDs are

normal, go to Step 3. If the status of the LEDs

are not normal, contact Huawei Technical

Support.

Step 3 View the status of the other LEDs on the BBU panel.

Step 4 Take corresponding actions based on the LED status.

If... Then...

The BBU is working normally, The power-on operation is complete.

The BBU is faulty, Rectify the fault, and then go to Step 1.

----End

BBU3900




7



3.2 Powering Off the BBU

The BBU power-off is classified into normal power-off and emergency power-off.

Procedure

Step 1 Choose normal power-off or emergency power-off based on the actual situation.

If... Then...

The BBU is powered off for routine

maintenance such as an equipment swap or a

foreseeable regional blackout,

Go to Step 2 to perform the normal power-

off.

The BBU encounters emergency conditions

such as incurs electric spark, smog, water immersion, and so on,

Go to Step 3 to perform the emergency

power-off.

Step 2 To perform the normal power-off, do as follows:

1. Set the power switch of the BBU to OFF.

2. Set the MCB on the PDU that corresponds to the BBU to OFF.

3. Set the MCB on the external power device that corresponds to the BBU to OFF.

Step 3 Set the MCB on the external power device that corresponds to the BBU to OFF. If time allows,

set the power switch of the BBU to OFF , and then set the MCB on the PDU that corresponds

to the BBU to OFF.

----End

BBU3900




8



4 Replacing the Components in the OMB

About This Chapter

This chapter describes how to replace the components in the Outdoor Mini Box (OMB), such

as the BBU, HEUA, AC/DC power equipment, DCDU-03B, and AC surge protection box.

4.1 Replacing the HEUA

The HEUA monitors the heat exchanger. The HEUA provides power to the FAN unit, monitors

the status of the FAN unit, and collects the alarm information about the cabinet and reports the

alarm to the main control unit.

4.2 Replacing the AC/DC Power Equipment

The AC/DC power equipment is used in an AC cabinet and converts external 220 V AC input power into -48 V DC power.

4.3 Replacing the DCDU-03B

The DCDU-03B distributes DC power to different components. Replacing the DCDU-03B

disrupts the power supply to the entire base station and all the services carried by the base station.

4.4 Replacing the AC Surge Protection Box

The AC surge protection box provides protection for the AC input power.

BBU3900

Hardware Maintenance Guide 4 Replacing the Components in the OMB



9



4.1 Replacing the HEUA

The HEUA monitors the heat exchanger. The HEUA provides power to the FAN unit, monitors

the status of the FAN unit, and collects the alarm information about the cabinet and reports the

alarm to the main control unit.

Prerequisite

l The tools and materials, such as an ESD wrist strap or ESD gloves and M6 screwdriver,

are ready.

l The quantity and type of board to be replaced are confirmed, and the new board is ready.

l The authorized personnel are permitted to enter the site. The required keys are available.

Context

Figure 4-1 shows the location of the HEUA in the OMB.

Figure 4-1 Location of the HEUA

HEUA

Procedure

Step 1 Wear an ESD wrist strap or a pair of ESD gloves.

BBU3900




10



CAUTION

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 2 Set the MCB labeled SW7 on the DCDU-03B to OFF to power off the HEUA.

Step 3 Record all the cable connections on the panel of the board to be replaced.

Step 4 Disconnect the power cable and monitoring cable from the HUEA, as shown in Figure 4-2.

Figure 4-2 Disconnecting cables

Step 5 Unscrew the cover plate, and then unscrew the HEUA, as shown in Figure 4-3.

Figure 4-3 Removing the HEUA

Step 6 Install the new board, tighten the screws on the board until the tightening torque reaches 0.55

N·m, then install the cover plate, tighten the screws on the cover plate until the tightening torque

reaches 0.55 N·m, and then reconnect the cables.

Step 7 Take off the ESD wrist strap or gloves, and then pack up all the tools.

----End

Follow-up Procedure

l Place the replaced component into an ESD box or bag. Then, place the ESD box or bag

into a carton padded with foam or into the original shipping box.

l Fill in the detail information of the faulty board being replaced in the fault form.

l Contact the local Huawei office to handle the faulty component.

BBU3900




11



4.2 Replacing the AC/DC Power Equipment

The AC/DC power equipment is used in an AC cabinet and converts external 220 V AC input

power into -48 V DC power.

Prerequisite

l The tools and materials, such as an ESD wrist strap or ESD gloves, M3 screwdriver, and

M6 screwdriver, are ready.

l The quantities and types of module to be replaced are confirmed, and the new modules are

ready.


Contextl The AC/DC power equipment consists of the Power Distribution Unit (PDU), Power

Supply Unit (PSU), Power Monitoring Unit (PMU), and subrack. When a component of

the AC/DC power equipment is faulty, you need to replace only the faulty component.

When the entire AC/DC power equipment is faulty, you must replace the AC/DC power

equipment.

l Figure 4-4 shows the location of the AC/DC power equipment in the cabinet.

Figure 4-4 Location of the AC/DC power equipment in the cabinet

1

(1) AC/DC power equipment

l Figure 4-5 shows the locations of the components in the AC/DC power equipment.

BBU3900




12



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

4

3

2

1

(1) PDU (2) PSU (3) PMU (4) Subrack

l 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.

Procedure

Step 1 Power off the AC/DC power equipment.


CAUTION



Step 3 Record all the cable connections on the panel of the component to be replaced.

Step 4 Disconnect the cables.

1. Disconnect the DC output power cable from the PDU, as shown in Figure 4-6.

Figure 4-6 Disconnecting the cable from the PDU

BBU3900




13



2. Disconnect the monitoring signal cable from the PMU, as shown in Figure 4-7.

Figure 4-7 Disconnecting the cable from the PMU

3. Disconnect the AC input power cable and DC output power cable from the subrack, as

shown in Figure 4-8.

Figure 4-8 Disconnecting the cables from the subrack

Step 5 Remove the component to be replaced.

1. Loosen the M3 screw on the panel of the PDU, and then remove the PDU, as shown in

Figure 4-9.

BBU3900




14



Figure 4-9 Removing the PDU

1

2

2. Loosen the M3 screw on the panel of the PSU, and then remove the PSU, as shown in

Figure 4-10.

Figure 4-10 Removing the PSU

1

2

3. Loosen the M3 screw on the panel of the PMU, and then remove the PMU, as shown in

Figure 4-11.

BBU3900




15



Figure 4-11 Removing the PMU

1

2

4. Loosen the four M6 screws on the mounting ears of the subrack, and then remove the

subrack, as shown in Figure 4-12.

Figure 4-12 Removing the subrack

BBU3900




16



NOTE

l If you have confirmed that the subrack is faulty and needs to be replaced, you must remove the

PDU, PSU, and PMU before removing the subrack from the cabinet.

l If you have confirmed that the entire AC/DC power equipment is faulty, you need to remove

only the AC/DC power equipment from the cabinet.

Step 6 If the PMU needs to be replaced, set the DIP switch on the new PMU according to the settings

of the DIP switch on the faulty PMU. If required, query the information about the DIP switch

by referring to AC/DC Power Equipment.

Step 7 Install the new component.

1. Install the AC/DC power equipment or subrack, tighten the screws on the mounting ears

until the tightening torque reaches 2 N·m, and then install related cables.

2. Install the PDU, PSU, or PMU, tighten the screws on the panel until the tightening torque

reaches 0.55 N·m, and then install related cables.

Step 8 Check whether the AC/DC power equipment works properly according to the status of the LEDson the AC/DC power equipment, BBU, and RRU.

NOTE

For details about the status of the LEDs on the AC/DC power equipment, BBU, and RRU, see the

corresponding hardware description document.

Step 9 Power on the AC/DC power equipment.


----End

Follow-up Procedurel Place the replaced component into the ESD box or bag. Then, place the ESD box or bag




4.3 Replacing the DCDU-03B

The DCDU-03B distributes DC power to different components. Replacing the DCDU-03B

disrupts the power supply to the entire base station and all the services carried by the base station.

Prerequisite


are ready.

l The quantity and type of module to be replaced are confirmed, and the new modules are

ready.


Context

l Figure 4-13 shows the location of the DCDU-03 in the OMB.

BBU3900




17



Figure 4-13 Location of the DCDU-03B

DCDU

l Replacing the DCDU-03B disrupts all the services carried by the base station. Therefore,

the DCDU-03B should be replaced within 20 minutes.

Procedure

Step 1 Power off the DCDU-03B.


CAUTION




Step 4 Disconnect the power cables from the DCDU-03B, as shown in Figure 4-14.

BBU3900




18




Step 5 Loosen the four M6 screws on the panel, and then remove the DCDU-03B, as shown in Figure

4-15.

Figure 4-15 Removing the DCDU-03B

BBU3900




19



Step 6 Install the new DCDU-03B, tighten the screws on the DCDU-03B until the tightening torque

reaches 2 N·m, and then reconnect the cables.

Step 7 Power on the DCDU-03B.


----End

Follow-up Procedure

l Place the replaced component into the ESD box or bag. Then, place the ESD box or bag




4.4 Replacing the AC Surge Protection BoxThe AC surge protection box provides protection for the AC input power.

Prerequisite


are ready.

l The quantity and type of AC surge protection box to be replaced are confirmed, and the

new AC surge protection box is ready.


Context

l Figure 4-16 shows the location of the AC surge protection box in the OMB.

BBU3900




20



Figure 4-16 Location of the AC surge protection box

1

(1) AC surge protection box

l Replacing the AC surge protection box disrupts the surge protection function of the base

station. Therefore, the AC surge protection box should be replaced in 10 minutes.

Procedure

Step 1 Power off the base station in the normal situation.


CAUTION



Step 3 Record all the cable connections on the panel of the AC surge protection box to be replaced.

Step 4 Disconnect the power cable and monitoring cable from the AC surge protection box, as shown

in Figure 4-17.

BBU3900




21




Step 5 Loosen the M4 screw on the panel, and then remove the AC surge protection box, as shown in

Figure 4-18.

Figure 4-18 Removing the AC Surge Protection Box

Step 6 Install the new AC surge protection box, tighten the screw on the panel until the tightening torque

reaches 1.2 N·m, and then reconnect the cables.

Step 7 Power on the base station.


----End

BBU3900




22



Follow-up Procedure





BBU3900




23



5 Replacing Components of the BBU3900

About This Chapter

This section describes how to replace components of the BBU, including BBU case, BBU boards

and modules, and optical modules.

5.1 Query Electronic Label of the Board

Before replacing a board, you need to query the electronic label of the board at the remote end

to confirm the type of board to be replaced.

5.2 Replacing the BBU in the 19-Inch Cabinet

This section describes how to replace the BBU in a 19-inch cabinet, such as in an APM30 or

TMC.


The WCDMA main processing & transmission unit (WMPT) processes signals and manages

resources on other boards.

5.4 Replacing the UPEU

The Universal Power and Environment Interface Unit (UPEU) is configured in the BBU and it

converts –48 V DC or +24 V DC power into +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 FAN 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) in the BBU3900 provides ports for

transmission.

5.8 Replacing the USCU

The Universal Satellite card and Clock Unit (USCU) in the BBU receives clock signals, such as

GPS, RGPS, BITS, and M-1PPS signals. In addition, it transmits or receives 1PPS+TOD clock signals.

BBU3900

Hardware Maintenance Guide 5 Replacing Components of the BBU3900



24




The WCDMA Baseband Process Unit (WBBP) is configured in the BBU and it processes

baseband signals.

5.10 Replacing the Optical Module

The optical module implements optical-electrical conversion, thus enabling optical transmission between the BBU and other devices.

BBU3900




25



5.1 Query Electronic Label of the Board

Before replacing a board, you need to query the electronic label of the board at the remote end

to confirm the type of board to be replaced.

1. Run the LST BRDINFO command on the LMT.

2. Confirm the type of board to be replaced according to the Boardtype and Description

fields in the queried result. Ensure that the new board is of the same type by checking the

information indicated by the bar code on the label of the panel or handle of the new board.

Figure 5-1 shows a label containing the bar code.

Figure 5-1 A label containing the bar code

5.2 Replacing the BBU in the 19-Inch CabinetThis section describes how to replace the BBU in a 19-inch cabinet, such as in an APM30 or

TMC.

Prerequisite


are ready.

l The type of BBU to be replaced and its quantity are confirmed, and the new BBU is ready.


Context

Replacing the BBU in a 19-inch cabinet disrupts all the services carried by the NodeB. Therefore,

the BBU should be replaced within 20 minutes.

Procedure

Step 1 Instruct the M2000 administrator to perform the following operations for the replacement of the

BBU:

1. Upload the configuration files of the base station on the FTP server of the M2000. For

details, see the Base Station Commissioning Guide.

Step 2 Power off the BBU. For details, see 3.2 Powering Off the BBU.

BBU3900




26



Follow-up Procedure


into a carton padded with foam or into the packing box of the new component.

l Fill in the fault form with the details of the replaced component.



The WCDMA main processing & transmission unit (WMPT) processes signals and manages

resources on other boards.

Prerequisite

l After confirming the type of a faulty board, do as follows:

–If the board can be queried online, run the associated command on the LMT to 5.1

Query Electronic Label of the Board.

– If the board is faulty and cannot be queried online, query the board information offline

on the M2000. For details, see Querying Inventory Data.

l Tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdrivers, are

ready.

l Associated personnel have been permitted to access the site and obtained required keys.

Context

l Figure 5-3 shows the position of the WMPT in the BBU.

Figure 5-3 Position of the WMPT in the BBU

WMPT

WMPT

ETH FE0 FE1 USBTST E1/T1 RSTGPS

RUNALMACT

TX RX

l The WMPT is hot-swappable.

l If no standby WMPT is configured, replacing the WMPT interrupts all services carried by

the NodeB. Therefore, the WMPT must be replaced within 10 minutes.

Procedure

Step 1 Instruct the M2000 administrator to perform the following operations before replacing the

WMPT:

1. Upload the NodeB configuration file on the M2000 by using the file transfer protocol (FTP).

For details, see Creating NodeB Commissioning Tasks.

2. On the NodeB, run the BLK LOCELL command to block all the cells of the NodeB.

BBU3900




28



Step 2 Wear an ESD wrist strap or ESD gloves.

WARNINGTake proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to

prevent electrostatic damage to the boards, modules, or electronic components.


Step 4 Disconnect the transmission cable from the WMPT. If a surge protection board is configured,

the surge protection transfer cable also needs to be disconnected, as shown in Figure 5-4.

Figure 5-4 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the WMPT, as shown in Figure

5-5.

Figure 5-5 Removing the WMPT

2

1

Step 6 Set the DIP switches on the new board according to the settings of the DIP switches on the faulty

board. For details, see WMPT.

Step 7 Install the new board, tighten the screws on the board to 0.6 N·m, and then reconnect the cables.

Step 8 Check the status of the new board by observing the status of indicators. For details about the

status of the indicators, see WMPT.

Step 9 Perform the following operations on the LMT:

1. Upgrade the NodeB software and configuration file. For details, see Upgrading the NodeB

Software.

2. Check whether any alarm is reported. For details, see Browsing Alarms. If an alarm is

reported, clear the alarm by referring to Querying Alarm Handling Suggestions.

Step 10 Perform the following operations on the M2000:

1. On the NodeB, run the UBL LOCELL command to unblock all the cells of the NodeB.

BBU3900




29



2. Synchronize the inventory information manually. For details, see Synchronizing Inventory

Data.

3. Set the status from TESTING to NORMAL. For details, see Setting the Maintenance

Mode.

Step 11 Take off the ESD wrist strap or ESD gloves, and pack up all the tools.

----End

Follow-up Procedure



l Fill in the fault form with the detailed information of the replaced component.


5.4 Replacing the UPEU

The Universal Power and Environment Interface Unit (UPEU) is configured in the BBU and it

converts –48 V DC or +24 V DC power into +12 V DC.

Prerequisite


– If the board can be queried online, run the associated command on the LMT to 5.1




l The tools and materials are ready, such as the ESD wrist strap or ESD gloves and M3

screwdriver.

l The associated personnel have been permitted to access the site and obtained the required

keys.

Context

l Figure 5-6 shows the position of the UPEU in the BBU.

Figure 5-6 Position of the UPEU

UPEU

l

Replacing the UPEU disrupts the power supply to the BBU, and accordingly disruptsservices carried by the BBU. Therefore, the UPEU should be replaced within 10 minutes.

BBU3900




30



Procedure


UPEU:

1. On the NodeB, run the BLK LOCELL command to block all the cells working in UMTSmode.

CAUTION

Replacing the UPEU disrupts all the services carried by the base station if no standby UPEU is

configured.

Step 2 Power off the BBU. For details, see Powering Off the BBU3900.


WARNING

Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to


Step 4 Record all the cable connections on the panel of the module to the replaced.

Step 5 Disconnect the power cable, monitoring cable, and alarm cable from the UPEU, as shown in

Figure 5-7.


Step 6 Remove the two M3 screws on the panel, and then pull out the UPEU, as shown in Figure

5-8.

Figure 5-8 Removing the UPEU

12

BBU3900




31




N·m, and then reconnect the cables.

Step 8 Power on the BBU. For details, see Powering on the BBU3900.

Step 9 Check the status of the LEDs to determine whether the new board works properly. For detailsabout the status of the LEDs, see UPEU.

Step 10 Perform the following operations on the local maintenance terminal (LMT):

1. On the UMTS side, check whether any alarm is reported on the NodeB LMT. For details,

see Browsing Alarms. If an alarm is reported, clear the alarm by referring to Querying

Alarm Handling Suggestions.

Step 11 Inform the M2000 administrator that the replacement is complete, and then instruct the

administrator to perform the following operations:

1. On the NodeB, run the UBL LOCELL command to unblock all cells working in UMTS

mode.


Data.


----End

Follow-up Procedure



lFill in the fault form with the detail information of the replaced component.


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.

Prerequisite







screwdriver.


keys.

Context

l Figure 5-9 shows the position of the UEIU in the BBU.

BBU3900




32



Figure 5-9 Position of the UEIU

UEIU

l The board is hot-swappable.

l Replacing the UEIU may cause the failure to monitor the external equipment. Therefore,

the UEIU must be replaced within five minutes.

Procedure


WARNING




Step 3 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-10.


Step 4 Remove the two M3 screws on the panel, and then pull out the UEIU, as shown in Figure

5-11.

Figure 5-11 Removing the UEIU

2

1

BBU3900




33









Step 7 Perform following operations on the M2000:


Data.


----End

Follow-up Procedure

lPlace the replaced component into the ESD box or bag. Then, place the ESD box or baginto a carton padded with foam or into the packing box of the new component.

l Fill in the fault form to record detailed information of the replaced components.


5.6 Replacing the FAN UnitThe FAN unit is located in the BBU. The FAN 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.

Prerequisite







screwdriver.


keys.

Context

l Figure 5-12 shows the position of the FAN unit in the BBU.

Figure 5-12 Position of the FAN unit

FAN

BBU3900




34



l The unit is hot-swappable.

l Replacing the FAN unit may lead to overtemperature alarms due to interruption of heat

dissipation in the BBU. Therefore, the FAN unit should be replaced within three minutes.

Procedure


WARNING



Step 2 Remove the two M3 screws on the panel, and then pull out the FAN unit, as shown in Figure

5-13.

Figure 5-13 Removing the FAN unit

1 2

CAUTION

When removing the FAN unit, do not touch the rotating fans to avoid injury of your hands.

Step 3 Install the new unit, tighten the screws on the unit until the tightening torque reaches 0.6 N·m.

Step 4 Check the status of the LEDs to determine whether the new module works properly. For details

about the status of the LEDs, see FAN.






1. Synchronize the inventory information manually. For details, see Synchronizing InventoryData.

BBU3900




35




----End

Follow-up Procedurel Place the replaced component into the ESD box or bag. Then, place the ESD box or bag




5.7 Replacing the UTRP

The Universal Transmission Processing unit (UTRP) in the BBU3900 provides ports for

transmission.

Prerequisite







screwdriver.


keys.

Context

l Figure 5-14 shows the recommended position of the UTRP in the BBU.

Figure 5-14 Position of the UTRP

RUN

ALM

ACT

E1/T1(0-3)

UTRP

E1/T1(4-7)

UTRP


Procedure

Step 1 Instruct the M2000 administrator to perform the following preparations for the replacement of

the UTRP:

1. On the NodeB, run the BLK LOCELL command to block all the cells working in UMTSmode.

BBU3900




36




WARNING




Step 4 Disconnect the transmission cable from the UTRP. If a surge protection board is configured, the

surge protection transfer cable also needs to be disconnected, as shown in Figure 5-15.


Step 5 Loosen the two M3 screws on the panel, and then remove the UTRP, as shown in Figure

5-16.

Figure 5-16 Removing the UTRP


board. If required, query the information about the DIP switch by referring to UTRP.



Step 8 Check the status of the LEDs to determine whether the new board works properly. For details

about the status of the LEDs, see UTRP.


BBU3900




37







1. On the NodeB, run the UBL LOCELL command to unblock all cells working in UMTS

mode.


Data.


----End

Follow-up Procedure


into a carton padded with foam or into the packing box of the new component.l Fill in the fault form to record detailed information of the replaced components.


5.8 Replacing the USCU

The Universal Satellite card and Clock Unit (USCU) in the BBU receives clock signals, such as

GPS, RGPS, BITS, and M-1PPS signals. In addition, it transmits or receives 1PPS+TOD clock

signals.

Prerequisitel After confirming the type of a faulty board, do as follows:





l The tools and materials are ready. They are the ESD wrist strap or ESD gloves and

screwdriver.


keys.

Context

l Figure 5-17 shows the position of the USCU in the BBU.

Figure 5-17 Position of the USCU

USCU

USCUALMALM

RUNRUN

ACT

ACT

TOD1

TOD1

GPS

RX RXTX TX

BITS

Y

RGPS

M1PPS

TOD0

GPSRX+ RX-TX+ TX-

BITS GRE E NI N

YE L L O W O UT

RGPS

M-1PPS

TOD0

1S 1SGNDPWR

1S+ 1S-GNDPWR

USCU

BBU3900




38




Procedure


WARNING




Step 3 Remove the GPS clock signal cable on the USCU, as shown in Figure 5-18.


Step 4 Remove the two M3 screws on the panel, and then pull out the USCU, as shown in Figure5-19.

Figure 5-19 Removing the USCU.

2

1




about the status of the LEDs, see USCU.



see Browsing Alarms. If an alarm is reported, clear the alarm by referring to QueryingAlarm Handling Suggestions.

BBU3900




39





Data.


----End

Follow-up Procedure






The WCDMA Baseband Process Unit (WBBP) is configured in the BBU and it processes

baseband signals.

Prerequisite




–If the board is faulty and cannot be queried online, query the board information offlineon the M2000. For details, see Querying Inventory Data.


screwdriver.


keys.

Context

l Figure 5-20 shows the position of the WBBP in the BBU.

Figure 5-20 Position of the WBBP

WBBP

WBBP TX RX

CPRI0/EIH0 CPRI1/EIH1 CPRI2/EIH2

T X R X T X R XRUNALMACT

l The WBBP is hot-swappable.

BBU3900




40



Procedure


WBBP:

1. On the NodeB, run the BLK BRD command to block the WBBP.


WARNING



Step 3 Record all the cable connections on the panel of the module to be replaced.

Step 4 Disconnect the CPRI cable from the WBBP, as shown in Figure 5-21.


Step 5 Remove the two M3 screws on the panel, and then pull out the WBBP, as shown in Figure

5-22.

Figure 5-22 Removing the WBBP

2

1




about the status of the LEDs, see WBBP.

Step 8 Perform following operations on the LMT:

1. Check whether any alarm is reported. For details, see Browsing Alarms. If an alarm isreported, clear the alarm by referring to Querying Alarm Handling Suggestions.

BBU3900




41



Step 9 Inform the M2000 administrator that the replacement is complete, and then instruct the

administrator to perform the following operations:

1. On the NodeB, run the UBL BRD command to unblock the WBBP.


Data.


----End

Follow-up Procedure





5.10 Replacing the Optical Module

The optical module implements optical-electrical conversion, thus enabling optical transmission

between the BBU and other devices.

Prerequisite

l The tools and materials are ready. They are the ESD wrist strap or ESD gloves.

l All the types of optical module are ready.

l The associated personnel have been permitted to access the site and obtained the requiredkeys.

Context

l Figure 5-23 shows the position of the optical module on a board.

Figure 5-23 Position of the optical module

1

(1) Optical module

l Optical modules are hot-swappable.

l Replacing the optical module disrupts the services on this port.

BBU3900




42



Procedure


CAUTION


prevent electrostatic damage to the boards, modules, or other electronic components.

Step 2 Prepare the optical module of the same type as the faulty optical module according to the label

on the module.

NOTE

The optical module to be replaced or to be installed must have a matching rate with the corresponding

CPRI port.

Step 3 Record the position of the faulty optical module on the board.

Step 4 Press the latch on the optical cable connector, and then remove the connector from the faulty

optical module, as shown in Figure 5-24.


WARNING

Do not look into the optical module without eye protection after the optical cable is removed

from the optical module.

Step 5 Turn the puller on the faulty optical module outwards, hold the puller and take the faulty optical

module out of the slot, and then remove the optical module from the BBU, as shown in Figure5-25.

BBU3900




43



Figure 5-25 Removing the optical module

Step 6 Install the new optical module onto the BBU.

Step 7 Remove the dustproof caps from the new optical module and optical connector, and then insert

the optical cable connector into the new optical module.

Step 8 Check whether the transmission is proper according to the status of the LEDs on the board. For

details about the status of the LEDs on the board, see the related hardware description.


----End

Follow-up Procedure

l Put the replaced components into an ESD box or bag. Then, put the ESD box or bag into

a carton padded with foam or into the packing boxes of the new components.


l Contact the local Huawei office to handle the faulty components.

BBU3900




44



6 Adding Components in the BBU3900

About This Chapter

During the maintenance of the baseband unit (BBU), some boards may be added, such as a

universal power and environment interface unit (UPEU) or a WCDMA Baseband Process Unit

(WBBP).

6.1 Adding a UPEU

The power of the baseband unit (BBU) may exceed the power supported by the universal power

and environment interface unit (UPEU). Therefore, a UPEUc is required.

6.2 Adding a WBBP

This section describes how to install a WCDMA baseband processing unit (WBBP) when aWBBP is required.

BBU3900

Hardware Maintenance Guide 6 Adding Components in the BBU3900



45



6.1 Adding a UPEU

The power of the baseband unit (BBU) may exceed the power supported by the universal power

and environment interface unit (UPEU). Therefore, a UPEUc is required.

NOTE

If the BBU is installed in an outdoor mini box (OMB) or indoor mini box (IMB03) with an AC power

supply, the BBU cannot be equipped with two UPEUs.

6.1.1 Adding a UPEUc

If a universal power and environment interface unit (UPEU) is already installed in the baseband

unit (BBU), a UPEUc can be added.

Prerequisitel The tools and materials are ready, such as the electrostatic discharge (ESD) wrist strap or

ESD gloves and M3 screwdriver.

l Associated personnel have obtained keys and site access permission.

Context

If the power of the BBU exceeds the power supported by the UPEU, a UPEUc must be added.

A UPEUa is already installed in slot 19 and the new UPEUc can be installed in slot 18, as shown

in Figure 6-1.

Figure 6-1 Slot for holding the new UPEUc

Procedure

Step 1 Wear the ESD wrist strap or ESD gloves.

WARNING

Take proper ESD protection measures, for example, wear the ESD wrist strap or ESD gloves,

to prevent electrostatic damage to the boards, modules, or electronic components.

Step 2 Install a UPEUc in slot 18 and tighten the screws on the panel to 0.6 N·m, as shown in Figure6-2.

BBU3900




46



Figure 6-2 Installing a UPEUc

Step 3 Install a power cable for the UPEUc. For details about the operation, see related installation

guide.

1. Link the 3V3 power connector at one end of the cable to the –48V port on the UPEUc, and

then tighten the screws on the connector to 0.25 N·m.

2. Link the other end of the cable to the power supply equipment onsite.


Step 5 Check the status of the indicators to determine whether the new board works properly by referring

to UPEU.

Step 6 Perform the following operations on the Local Maintenance Terminal (LMT):

1. On the NodeB, run the ADD BRD command to configure the installed UPEUc.

2. On the eNodeB, run the ADD BRD command to configure the installed UPEUc.

3. On the BSC, run the ADD BTSBRD command to configure the installed UPEUc.


----End

6.1.2 Adding a UPEUc to Replace the UEIU

If a universal power and environment interface unit (UPEU) and a universal environment

interface unit (UEIU) are installed in the BBU, you can replace the UEIU with a UPEUc.

Prerequisite

l The tools and materials are ready, such as the electrostatic discharge (ESD) wrist strap or



Context

A UPEUa is installed in slot 19 and the UEIU to be removed is installed in slot 18, as shown in

Figure 6-3.

BBU3900




47



Figure 6-3 Slot of the UEIU to be removed

Procedure

Step 1 Instruct the M2000 administrator to perform the following operations:

1. Run the LST ALMPORT command to record the configuration data for alarms on the

board.

2. Run the RMV BRD command to remove the UEIU.


WARNING






Step 5 Remove the two M3 screws on the panel, and then pull out the UEIU, as shown in Figure 6-5.


2

1

BBU3900




48



Step 6 Install a UPEUc in slot 18 and tighten the screws on the panel to 0.6 N·m, as shown in Figure

6-6.



guide.




Step 8 Install the cables originally connected to the UEIU to the correct ports on the UPEUc based on

the recorded cable connections of the UEIU.



to UPEU.





4. On the NodeB, eNodeB, and BSC, Run the SET ALMPORT command to restore the alarm

configuration data.

Step 12Take off the ESD wrist strap or ESD gloves, and pack up all the tools.

----End

Follow-up Procedure

Place the removed 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.

6.1.3 Adding two UPEUc Boards to Replace the UEIU and UPEUa

If a universal power and environment interface unit (UPEUa) and a universal environment

interface unit (UEIU) are installed in the baseband unit (BBU), you can replace the UPEUa andUEIU with two UPEUc boards.

BBU3900




49



Prerequisite




Context

The UEIU to be removed is installed in slot 18 and the UPEUa to be removed is installed in slot

19, as shown in Figure 6-7.

Figure 6-7 Slots of the UEIU and UPEUa

Procedure

Step 1 Check whether the alarm cables are connected to the EXT_ALM ports on the UEIU and the

UPEUa. If alarm cables are not connected to the ports, go to step 3. If alarm cables are connected

to the ports, go to step 2.

Step 2 Instruct the M2000 administrator to perform the following operations:

1. Run the LST ALMPORT command to record the alarm configuration data on the UEIUand the UPEUa.

2. Run the RMV BRD command to remove the UEIU and the UPEUa.


WARNING



Step 4 Record all the cable connections on the panels of the UEIU and UPEUa.



BBU3900




50



Step 6 Remove the two M3 screws on the panel, and then pull out the UEIU, as shown in Figure 6-9.


2

1


6-10.



guide.




Step 9 Install the cables originally connected to the UEIU to the correct ports on the UPEUc based on

the recorded cable connections of the UEIU.

Step 10 Power on the UPEUc in slot 18 by referring to Powering on the BBU3900.

Step 11 Power off the UPEUa in slot 19 by referring to Powering Off the BBU3900.

Step 12 Disconnect the power cable, monitoring cable, and alarm cable from the UPEUa, as shown in

Figure 6-11.

Figure 6-11 Disconnecting a cable

BBU3900




51



Step 13 Remove the two M3 screws on the panel, and then pull out the UPEU, as shown in Figure

6-12.

Figure 6-12 Removing the UPEU

12


6-13.



guide.




Step 16 Install the ca bles originally connected to the UPEUa to the correct ports on the UPEUc based

on the recorded cable connections of the UPEUa.



to UPEU.





BBU3900




52




configuration data.


----End

Follow-up Procedure

Place the removed components 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 components.

6.1.4 Adding two UPEUc Boards to Replace Two UPEUa Boards

If two universal power and environment interface units (UPEUa boards) are installed in the

baseband unit (BBU), you can replace the UPEUa boards with two UPEUc boards.

Prerequisitel The tools and materials are ready, such as the electrostatic discharge (ESD) wrist strap or



Context

The UPEUa boards to be removed are installed in slot 18 and slot 19, as shown in Figure

6-14.

Figure 6-14 Slot of the UPEUa boards

Procedure

Step 1 Check whether alarm cables are connected to the EXT_ALM ports on the UPEUa boards. If

alarm cables are not connected to the ports, go to step 2. If alarm cables are connected to the

ports, instruct the M2000 administrator to perform the following operation:

1. Run the LST ALMPORT command to record the alarm configuration data.


WARNING



BBU3900




53



Step 3 Record all the cable connections on the panels of the two UPEUa boards.


Step 5 Disconnect the cables connected to the UPEUa in slot 18, as shown in Figure 6-15.

Figure 6-15 Disconnecting a cable

Step 6 Remove the UPEUa in slot 18, as shown in Figure 6-16.

Figure 6-16 Removing the UPEUa in slot 18


6-17.


Step 8 Connect the cables to the correct ports on the UPEUc installed in slot 18 based on the recorded

cable connections.



BBU3900




54



Step 11 Disconnect the cables connected to the UPEUa in slot 19, as shown in Figure 6-15.

Step 12 Remove the UPEUa in slot 19, as shown in Figure 6-18.

Figure 6-18 Removing the UPEUa in slot 19

12

Step 13 Install a UPEUc in slot 19 and tighten the screws on the panel to 0.6 N·m, as shown in Figure6-19.

Figure 6-19 Installing a UPEUc in slot 19

Step 14 Connect the cables to the correct ports on the UPEUc installed in slot 19 based on the recorded

cable connections.



to UPEU.

Step 17 Perform the f ollowing operations on the Local Maintenance Terminal (LMT):





configuration data.


----End

BBU3900




55



Follow-up Procedure

Place the removed components 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 components.

6.2 Adding a WBBP

This section describes how to install a WCDMA baseband processing unit (WBBP) when a

WBBP is required.

Prerequisite




Context

If a WBBP is added, the power of the BBU may exceed the power supported by the universal

power and environment interface unit (UPEU). Therefore, a UPEUc is requir ed. For details about

how to install a UPEUc before installing the WBBP, see 6.1 Adding a UPEU. In some hot areas,

if another UPEU is installed in the BBU in an outdoor AC cabinet, the FAN unit in the BBU

must be replaced with a FANc unit that operates at a high speed. For details about how to replace

a FAN unit, see 5.6 Replacing the FAN Unit.

NOTE

A hot area refers to an area where the daily maximum temperature is higher than 45°C for more than 10

days in a year.

Procedure


WARNING



Step 2Install the WBBP in the correct slot, as shown in Figure 6-20.

NOTE

For details about the configuration principle of the WBBP, see .

BBU3900




56



Figure 6-20 Installing the WBBP

Step 3 If a common public radio interface (CPRI) cable must be connected to the WBBP, install the

CPRI cable by referring to the related installation guide.

Step 4 Perform the following operation on the Local Maintenance Terminal (LMT):

1. Run the ADD BRD command to configure the installed WBBP.


----End

BBU3900




57



7 Replacing SLPU Components

About This Chapter

During the SLPU maintenance, the SLPU components, such as the SLPU case, UELP, and

UFLP, can be replaced as required

7.1 Replacing the SLPU

The Signal Lightning Protection Unit (SLPU) provides surge protection for a base station.

7.2 Replacing the UELP

Each Universal E1/T1 Lightning Protection unit (UELP) provides protection for four E1s/T1s.

7.3 Replacing the UFLPThe universal FE lightning protection unit (UFLP) provides surge protection for base stations.

BBU3900

Hardware Maintenance Guide 7 Replacing SLPU Components



58



7.1 Replacing the SLPUThe Signal Lightning Protection Unit (SLPU) provides surge protection for a base station.

Prerequisite

l Tools and materials, such as an ESD wrist strap or ESD gloves and screwdrivers, are ready.

l The type of board to be replaced and its quantity are confirmed, and the new case is ready.


Context

l Figure 7-1 shows the position of the SLPU in a cabinet.

Figure 7-1 Position of the SLPU

Procedure


WARNING




Step 3 Remove the transmission cables of the boards in the SLPU case.

Step 4 Remove the four M6 screws on the panel, and then pull out the SLPU case, as shown in Figure

7-2.

Figure 7-2 Removing the SLPU

BBU3900




59



Step 5 Remove all the boards in the faulty SLPU case, install them in the corresponding slots of the

new BBU case, and then install filler panels in the idle slots.

Step 6 Install the new case, tighten the screws on the case until the tightening torque reaches 2 N·m,and then reconnect the cables.







Data.


----End

Follow-up Procedure



l Fill in the fault f orm to record detailed information of the replaced components.


7.2 Replacing the UELPEach Universal E1/T1 Lightning Protection unit (UELP) provides protection for four E1s/T1s.

Prerequisite







screwdriver.


Context

l Figure 7-3 shows the position of the UELP in the SLPU.

Figure 7-3 Position of the UELP

SLPU

UELP

S0INSIDE OUTSIDE

S1

S2

S3

UELP

BBU3900




60




Procedure


CAUTION




Step 3 Disconnect the transmission cables from the UELP, as shown in Figure 7-4.


Step 4 Remove the two M3 screws on the panel, and then pull out the UELP, as shown in Figure 7-5.

Figure 7-5 Removing the UELP

1

21


board. If required, query the information about the DIP switch by referring to UELP.





see Browsing Alarms. If an alarm is reported, clear the alarm by referring to QueryingAlarm Handling Suggestions.

BBU3900




61





Data.


----End

Follow-up Procedure





7.3 Replacing the UFLP

The universal FE lightning protection unit (UFLP) provides surge protection for base stations.

Prerequisite





on the M2000. For details, see Querying Inventory Data.l Tools and materials, such as an ESD wrist or ESD gloves and M3 screwdrivers, are ready.


Context

l Figure 7-6 shows the position of the UFLP in the SLPU.

Figure 7-6 Position of the UFLP

SLPUS0

S1

S2

S3

FE0

INSIDE OUTSIDE

FE1 FE0 FE1UFLP

UFLP


Procedure


BBU3900




62



CAUTION




Step 3 Disconnect transmission cables from the UFLP, as shown in Figure 7-7.


Step 4 Remove the two M3 screws on the panel, and pull out the UFLP, as shown in Figure 7-8.

Figure 7-8 Removing the UFLP

1

21

Step 5 Install the new board, tighten the screws on the board to 0.6 N·m, and reconnect the cables.







Data.


----End

Follow-up Procedure

l

Place the replaced component into the ESD box or bag. Then, place the ESD box or baginto a foam-padded carton or the packing box of the new component.

BBU3900




63



l Fill in the fault form with detailed information about the replaced component.


BBU3900


bbu3900 hardware maintenance guide(v200_08)(pdf)-en

Documents