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BTS3900 (Ver.B)

Site Maintenance Guide

Issue 07

Date 2011-08-30

HUAWEI TECHNOLOGIES CO., LTD.


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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 writtenconsent 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 thecustomer. 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 representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 07 (2011-08-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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About This Document

PurposeThis document describes the routine hardware maintenance items of the BTS3900 (Ver.B)(hereinafter referred to as BTS3900). The maintenance items are equipment room environment

maintenance, power and grounding system maintenance, and cabinet maintenance. Thisdocument also describes the procedures for replacing components, modules, and boards.

Product VersionThe following table lists the product version related to this document.

Product Name Product Version

BTS3900 (Ver.B) WCDMA V200R013

BTS3900 (Ver.B) LTE V100R004

BTS3900 (Ver.B) GSM V100R013

BTS3900 (Ver.B) V100R004

Intended AudienceThis document is intended for:l System engineersl Site maintenance engineers

Organization1 Changes in the BTS3900 (Ver.B) Site Maintenance Guide

This describes the changes in the BTS3900 (Ver.B) Site Maintenance Guide .

2 Preparations for Base Station Site Maintenance

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This section describes the preparation strategy for base station site maintenance. The preparations for site maintenance involve obtaining site information, selecting maintenanceitems, and arranging maintenance tools and spare parts.

3 Hardware Items of BTS3900 Routine Maintenance

This chapter describes the routine maintenance for the hardware in the cabinet. The hardwareitems for routine maintenance are the equipment room environment of the BTS3900, power supply and grounding system, and main components in the BTS3900.

4 Powering On/Off the BTS3900

This chapter describes how to power on or off the BTS3900 during the maintenance. When you power on the equipment, comply with related procedure and rules. When you power off theequipment, determine whether to perform normal power-off or emergency power-off accordingto field requirements.

5 Replacing BTS3900 Components

Faulty BTS3900 components must be replaced in time. The replaceable components are theBBU3900, boards and module in the BBU3900, RFUs, DCDU-01, FAN unit, power subrack,PMU, and PSUs.

ConventionsSymbol 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 notavoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if notavoided, 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 supplementimportant points of the main text.

General Conventions

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.



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Boldface Names of files, directories, folders, and users are inboldface . For example, log in as user root .

Italic Book titles are in italics .

Courier New Examples of information displayed on the screen are inCourier 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 byvertical 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 byvertical bars. A minimum of one item or a maximum of allitems can be selected.

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

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



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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 meansthe 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 movingthe pointer.

Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.

Drag Press and hold the primary mouse button and move the pointer to a certain position.



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Contents

About This Doc ument.....................................................................................................................ii

1 Changes in the BTS3900 (Ver.B) Site Maintenance Guide....................................................1

2 Preparations for Base Station Site Maintenance.....................................................................5

3 Hardware Items of BTS3900 Routine Maintenance................................................................73.1 Maintenance I tems of the Equipment Room Environment................................................................................8

3.2 Power Supply and Grounding System Maintenance Items................................................................................9

3.3 Maintenance I tems of the Main Components.....................................................................................................9

4 Powering On/Of f the BTS3900..................................................................................................114.1 Powering On the BTS3900...............................................................................................................................12

4.2 Powering Off the BTS3900..............................................................................................................................15

5 Replacing BTS39 00 Components..............................................................................................175.1 Replacing BB U3900 Parts................................................................................................................................19

5.1.1 Query E lectronic Label of the Board.......................................................................................................19

5.1.2 Repl acing the BBU3900 Case.................................................................................................................19

5.1 .3 Replacing the GTMU..............................................................................................................................22

5.1.4 Repl acing the WMPT..............................................................................................................................25

5.1.5 Repl acing the LMPT...............................................................................................................................27

5.1 .6 Replacing the WBBP...............................................................................................................................29

5.1.7 Replacing the LBBP................................................................................................................................31

5.1.8 Repl acing the FAN Unit..........................................................................................................................33

5.1.9 Repl acing the UPEU................................................................................................................................355.1.10 Re placing the UEIU...............................................................................................................................38

5.1 .11 Replacing the USCU.............................................................................................................................40

5.1 .12 Replacing the UTRP..............................................................................................................................42

5.1.13 Replacing the UBRI...............................................................................................................................44

5.1.14 Replacing the Optical Module...............................................................................................................47

5.2 Ad ding Components in the BBU3900..............................................................................................................49

5.2.1 Adding a UPEU.......................................................................................................................................49

5.2.2 Adding a WBBP......................................................................................................................................59

5.3 Replacing an RFU............................................................................................................................................60

5.4 Replacing a DCDU-01......................................................................................................................................66

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5.5 Replacing the Fan Box.....................................................................................................................................68

5.6 Replacing the Power Subrack (AC/DC)...........................................................................................................71

5.7 Replacing the PMU..........................................................................................................................................74

5.8 Replacing the PSU (AC/DC)............................................................................................................................76

5.9 Replacing the Power Subrack (DC/DC)...........................................................................................................77

5.10 Replacing the PSU (DC/DC)..........................................................................................................................79

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1 Changes in the BTS3900 (Ver.B) SiteMaintenance Guide

This describes the changes in the BTS3900 (Ver.B) Site Maintenance Guide .

07 (2011-08-30)This is the seventh official release.

Compared with the 06 (2011-08-05), no content is added.

Compared with the 06 (2011-08-05), this issue incorporates the following changes:

Contents Change Description

About This Document Added Ver.B to the cabinet version in thedocument name.

Compared with the 06 (2011-08-05), no content is deleted.

06 (2011-08-05)This is the sixth official release.




5.1.3 Replacing the GTMU The influence of replacing the GTMU isadded.

All the chapters of replacing BBU3900 boards.

The chapter names of the referencedocuments in replacing steps are added.


BTS3900 (Ver.B)Site Maintenance Guide 1 Changes in the BTS3900 (Ver.B) Site Maintenance Guide


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05 (2011-07-08)This is the fifth official release.




5.3 Replacing an RFU Optimized the information in this document.


04 (2011-06-10)This is the fourth official release.

Compared wit h the 03 (2011-05-25), this is sue adds the following change:l 5.2 Adding Components in the BBU3900

Compared with the 03 (2011-05-25), this issue incorporates the following change:


5.3 Replacing an RFU The steps of setting the maximum transmit power of the RFU are changed.


03 (2011-05-25)This is the thir d official release.




5.1.4 Replacing the WMPT The operations for loading and activating theWMPT software are modified.

5.3 Replacing an RFU The operations of querying and handling thealarms are changed.


02 (2011-04-10)This is the second official release.



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Compared with the 01 (2011-03-30), this issue incorporates the following change:


5.3 Replacing an RFU The operations performed on the M2000 andLMT are differentiated.


01 (2011-03-30)

This is the first official release.

Compared with the Draft B (2011-03-10), no content is added.

Compared with the Draft B (2011-03-10), this issue incorporates the following changes:


5.1 Replacing BBU3900 Parts l The operation for blocking cells duringthe WMPT replacement is added.

l The operations for loading and activatingthe WMPT software are modified.

l The operations performed on the M2000and LMT are differentiated.

5.3 Replacing an RFU The methods for identifying GRFUs of V1,V2, V2a or MRFUs of V1, V2, and V2a areadded.

Compared with the Draft B (2011-03-10), no content is deleted.

Draft B (2011-03-10)

This is the Draft release.

Compared with the Draft A (2011-01-30), no content is added.

Compared with the Draft A (2011-01-30), this issue incorporates the following change:


5.3 Replacing an RFU The operations for setting power locking for the MRFU V2 are added to the procedure for replacing an RFU.

Compared with the Draft A (2011-01-30), no content is deleted.



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Draft A (2011-01-30)

This is the Draft release.

Compared with the WCDMA-NodeB V200R012C00, GSM-BTS V100R012C00, MBTS

V100R003C00, no content is added.

Compared with the WCDMA-NodeB V200R012C00, GSM-BTS V100R012C00, MBTSV100R003C00, no content is changed.

Compared with the WCDMA-NodeB V200R012C00, GSM-BTS V100R012C00, MBTSV100R003C00, no content is deleted.



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2 Preparations for Base Station SiteMaintenance

This section describes the preparation strategy for base station site maintenance. The preparations for site maintenance involve obtaining site information, selecting maintenanceitems, and arranging maintenance tools and spare parts.

Collecting Site Information

Before you maintain the base station site, collect the following information:

l Faults and alarms that are not clearedl Hardware configurationsl Local environmentl Spare parts

Selecting Maintenance Items

Select suitable maintenance items based on actual requirements of the base station. Themaintenance items are as follows:

l Equipment room environment of the base stationl Power supply and grounding system of the base station

l Main components in the base stationl Antenna system of the base station

Preparing Maintenance Tools and Spare Parts

Prepare the related maintenance tools and spare parts based on the site information andmaintenance items of the base station.

The most commonly used tools for site maintenance are as follows:

l Frequency test devices, such as a frequency generator and a spectrum analyzer.l

Power test devices that are used to test and analyze the output power of the base station.Power meter is a commonly used power test device.

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l Antenna and feeder test devices that are used to test the Voltage Standing Wave Ratio(VSWR), return loss, and cable insertion loss for fault location. The commonly usedantenna and feeder test device is the SiteMaster.

l Other devices

Multimeter Diagnosis tools and robustness test devices Local Maintenance Terminal (LMT) Rubidium clock (used to locate the clock of the base station)

NOTE

Addition tools and new parts may be required when more faulty parts are found during themaintenance.

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3 Hardware Items of BTS3900 RoutineMaintenance

About This Chapter

This chapter describes the routine maintenance for the hardware in the cabinet. The hardwareitems for routine maintenance are the equipment room environment of the BTS3900, power supply and gr ounding system, and main components in the BTS3900.

3.1 Maintena nce Items of the Equipment Room EnvironmentThis section d escribes the maintenance items, maintenance intervals, operation instructions, and

reference sta ndards for the equipment room environment.3.2 Power Su pply and Grounding System Maintenance ItemsThis section p rovides the maintenance items, maintenance intervals, operation instructions, andreference sta ndards for the power supply and grounding system of the base station.

3.3 Maintena nce Items of the Main ComponentsThis section describes the maintenance items, maintenance intervals, operation instructions, andreference standards for the main components in the cabinet.

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3.1 Maintenance Items of the Equipment RoomEnvironment

This section describes the maintenance items, maintenance intervals, operation instructions, andreference standards for the equipment room environment.

Table 3-1 describes the maintenance items of the equipment room environment.

Table 3-1 Maintenance items of the equipment room environment

Item Interval Operation Instruction Reference Standard

Environmentalalarms

Daily Check whether power supply alarms, fire alarms,or smoke alarms arereported.

No power supply alarms,fire alarms, or smokealarms are reported.

Temperature inthe equipmentroom

Weekly Record the temperatureshown on the thermometer in the equipment room.

The normal temperatureranges from -20C to +55C.

Humidity in theequipmentroom

Weekly Record the humidity shownon the hygrometer in theequipment room.

The normal humidityranges from 5% RH to 95%RH.

Illumination inthe equipmentroom

Every twomonths

Check whether the routineand emergency illuminationin the equipment room isnormal.

-

Air conditioner Every twomonths

Check whether the air conditioner is workingnormally.

-

Protectivedevices

Every twomonths

Check whether anti-disaster devices, equipment

protection devices, and fire- protection devices are ingood condition.

l The foam extinguisher or dry powder fireextinguisher is installedin the equipment room.The pressure and

validity period of theextinguisher meet therequirements.

l There is no danger of damage to theequipment by rats or insects.

Equipmentroomcleanliness

Every twomonths

Check whether cabinets,equipment housing,equipment interior, tables,floor, doors, and windowsare clean.

All the items to be checkedare clean.



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3.2 Power Supply and Grounding System MaintenanceItems

This section provides the maintenance items, maintenance intervals, operation instructions, andreference standards for the power supply and grounding system of the base station.

Table 3-2 lis ts the routi ne maintenance items for the power supply and grounding system.

Table 3-2 Routine maintenance items for the power supply and grounding system

Item Interval OperationInstruction

Reference Standard

Power cables Monthly Check the connectionsof power cablescarefully.

The power cables are notaging, and there is nocorrosion on theconnection points.

Voltage Monthly Measure the voltage of the power supply usinga multimeter.

The voltage is withinnormal range.

PGND cables Monthly Check whether thePGND cable andground bar areconnected properly.

The connections of thePGND cable are secure.The cable is not aging.The connection points aresound with no corrosionon them.

Checking Earthresistance

Monthly Measure the earthresistance using anelectric earth resistancetester and keep a record.

The grounding resistanceof the cabinet is smaller than 10 ohms.

Batteries Annually Check the batteries andrectifiers.

The battery capacity iswithin normal range andthe batteries are correctlyconnected. The

performance parametersof rectifiers are normal.

3.3 Maintenance Items of the Main ComponentsThis section describes the maintenance items, maintenance intervals, operation instructions, andreference standards for the main components in the cabinet.

Table 3-3 describes the maintenance items of the main components in the cabinet.



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Table 3-3 Maintenance items of the main components in the cabinet

Item Interval Operation Instruction Reference Standard

Fans Monthly Check whether the fans are

operational.

The fans work properly

without exceptionalsounds generated byfrictions between the

blades of the fan and thesubrack.

LEDs on the boards

Monthly Check whether the LEDs on the boards are normal.

For details about thestatus of LEDs, see thehardware descriptionabout the corresponding

boards.

Air filter Quarterly Replace the air filter if toomuch dust is coated.

-

Exterior of the cabinet

Quarterly Check whether there are dents,cracks, holes, or corrosion onthe surface of the cabinet andwhether the cabinet label islegible.

-

Lock anddoor of thecabinet

Quarterly Check whether the lock isnormal and the door can beopened and closed easily.

-

Cabinetcleanliness Quarterly Check whether the cabinet isclean. The cabinet surface isclean. The subracks arenot dusty.

ESD wriststrap

Quarterly Use either of the followingmethods:l Use an ESD wrist strap

tester to test the ESD wriststrap.

l Use a multimeter to test theearth resistance of the ESDwrist strap.

l If you are using anESD wrist straptester, the LEDGOOD is on.

l If you are using amultimeter, the earthresistance is between0.75 M and 10 M.

Fan box Annually Clean the fan box if too muchdust is coated on its surface or inside the fan box.

-



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4 Powering On/Off the BTS3900About This Chapter

This chapter describes how to power on or off the BTS3900 during the maintenance. When you power on the equipment, comply with related procedure and rules. When you power off theequipment, determine whether to perform normal power-off or emergency power-off accordingto field requirements.

4.1 Powering On the BTS3900This section describes how to power on the BTS3900 and handle the power supply failure of internal comp onents of the cabinet.

4.2 Powering Off the BTS3900You can pow er off the BTS3900 by two methods: normal power-off and emergency power-off.You need to perform the normal power-off b efore an equipment swap or a foreseeable regional

blackout. You need to perform the emergency power-off when a fire, smoke, or water immersionoccurs in the equipment room.

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4.1 Powering On the BTS3900This section describes how to power on the BTS3900 and handle the power supply failure of internal components of the cabinet.

Prerequisitel The input power cables are correctly and securely connected.l The power input of the BTS3900 meets the specifications listed in Power Supply

Requirements of the BTS3900.l The power switches on the DCDU-01 in the BTS3900 are set to OFF.l The external power supply to the BTS3900 is cut off.

ContextFigure 4-1 shows the power switches on panel of the DCDU-01.

Figure 4-1 Panel of the DCDU-01

Table 4-1 describes the power switches on the DCDU-01.

Table 4-1 Power switches on the DCDU-01

Power Switch Module

SPARE2 Reserved

SPARE1 Reserved

BBU BBU

FAN FAN unit

RFU5 RFU in slot 5

RFU4 RFU in slot 4

RFU3 RFU in slot 3

RFU2 RFU in slot 2



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Power Switch Module

RFU1 RFU in slot 1

RFU0 RFU in slot 0

NOTE

The slots where the RFUs are installed are numbered 0 to 5 from left to right.

Procedure

Step 1 Turn on the external power switch to power on the BTS3900.

If... Then...

The cabinet is a BTS3900 (+24 V) or BTS3900 (220 V) cabinet Go to Step 2 .

The cabinet is a BTS3900 (-48 V) cabinet, Go to Step 3 .

Step 2 Check whether the PSU works properly. For details, see PSU (AC/DC) or PSU (DC/DC).

Step 3 Check whether the input voltage of the DCDU-01 in the BTS3900 is normal.

If... Then...

The input voltage of the DCDU-01 is not inthe range from -38.4 V DC to -57 V DC

The power supply in the cabinet is improper.Go to Step 4 .

The input voltage of the DCDU-01 is withinthe range from -38.4 V DC to -57 V DC

The power-on check for the cabinet iscomplete. Go to Step 7 .

Step 4 Turn off the external power switch to power off the BTS3900.

Step 5 Check the connections and routing of the power cables for the DCDU-01.

Step 6 Go to Step 3 to check whether the output voltage of the DCDU-01 is normal.Step 7 Turn on the power switches on the DCDU-01, and then check the DC power supply to the internal

components of the cabinet. Table 4-2 describes the power supply to the components.

Table 4-2 Indication of normal power supply to the components

Component Indication of Normal Power Supply

BBU GTMU The RUN LED blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).

WMPT The RUN LED blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).



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Component Indication of Normal Power Supply

LMPT The RUN LED blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).

WBBP The RUN LED blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).

LBBP The RUN LED blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).

FAN The STATE LED blinks green (on for 1s and off for 1s).

UPEU The RUN LED is steady green.

UBRI The RUN LED blinks green slowly (on for 1s and off for 1s).

Fan Box The fan works properly, and the RUN LED on the panelof the FAN unit blinks green (on for 1s and off for 1s).

RFU The RUN LED on the panel of each RFU blinks green (onfor 1s and off for 1s).

PMU The RUN LED blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).

PSU(AC/DC)

PSU(DC/DC)

The power input LED is steady green.

Step 8 If the power supply to the components fails a fter the ca binet is powered on, performtroubleshooting as described in Table 4-3 .

Table 4-3 Troubleshooting

Fault Type Handling Measures

Failure of power supply to all the internalcomponents of the cabinet

Check whether the GND and -48 V power cables are inversely connected.l If the cable connection is wrong, set all the

circuit breakers to OFF, and then

reconnect the power cables.l If the cable connection is correct, replace

the DCDU-01.



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Fault Type Handling Measures

Failure of power supply to a board in thecabinet

Do as follows:

1. Remove the board, and then check

whether the pins of the board slot on the backplane are distorted, broken, or missing. Replace the subrack if necessary.

2. Insert the board into the subrack, andcheck the LED on the board.

3. If the status of the LED indicates an error,remove the board, insert it into another idle slot that can house the board of thesame type, and then check the LED on the

board.l If the board works properly, you can

infer that the slot is faulty. In this case,replace the subrack.

l If the fault persists, you can infer thatthe board is faulty. In this case, replacethe board.

Failure of power supply to any other component in the cabinet

Use a multimeter to measure the input voltageof the faulty component.l If the input voltage is within the range of

-38.4 V DC to -57 V DC, replace thecomponent.

l If the input voltage is out of the range of -38.4 V DC to -57 V DC, check theconnections of the power cables for thecomponent. If the power cables are not securely

connected, set all the power switcheson the DCDU-01 to off, and thenreconnect the power cables.

If the power cables are securelyconnected, replace the DCDU-01

because the circuit breakers on the

DCDU-01 might be faulty, or replacethe power cables.

.

----End

4.2 Powering Off the BTS3900You can power off the BTS3900 by two methods: normal power-off and emergency power-off.

You need to perform the normal power-off before an equipment swap or a foreseeable regional



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blackout. You need to perform the emergency power-off when a fire, smoke, or water immersionoccurs in the equipment room.

Procedurel Perform the normal power-off.

1. Modify the management status to block all the RFUs in the cabinet.

NOTE

Although the RFU can be blocked either remotely or locally, you are advised to block the RFUremotely.

If the RF module works in dual mode, you need to block the RFU in both modes.

Note that you cannot block an RF module working in GSM mode but can only block the carriersof the RF module.

2. Set all the circuit breakers on the DCDU-01 to OFF.

3. Shut off the external power supply. Set the power switch for the batteries to OFF if the BTS3900 cabinet is configured with external batteries or PS4890 cabinet whichhouses batteries.

l Perform the emergency power-off.

CAUTION

Emergency power-off may cause damage to the equipment or boards. Therefore, this typeof power-off is not recommended in a normal situation.

1. Shut off the external power supply. Set the power switch for the batteries to OFF if the BTS3900 cabinet is configured with external batteries or PS4890 cabinet whichhouses batteries.

2. Set all the DC power switches on the DCDU to OFF if time permits.

----End



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5 Replacing B TS3900 ComponentsAbout This Chap ter

Faulty BTS3 900 components must be replaced in time. The replaceable components are theBBU3900, bo ards and module in the BBU3900, RFUs, DCDU-01, FAN unit, power subrack,PMU, and PS Us.

5.1 Replacing BBU3900 PartsDuring the BBU3900 maintenance, the following parts of the BBU3900 can be replaced asrequired: the BBU3900 case, BBU3900 boards and module, and optical modules.

5.2 Adding Components in the BBU3900During the m aintenance of the baseband unit (BBU), some boards may be added, such as auniversal pow er and environment interface unit (UPEU) or a WCDMA Baseband Process Unit(WBBP).

5.3 Replacing an RFUReplacing a r adio frequency unit (RFU) interrupts the services carried on the RFU.

5.4 Replacing a DCDU-01The DCDU-01, installed under the BBU3900, supplies DC power for the cabinet.

5.5 Replacing the Fan BoxThe fan box works with the air inlet box in the cabinet to form a ventilation loop, and providesforced ventilation.

5.6 Replacing the Power Subrack (AC/DC)The power subrack (AC/DC), which is located in the lower part of the BTS3900 cabinet, provides

power input and output ports.

5.7 Replacing the PMUThe PMU performs the power system management, power distribution detection, and alarmreporting functions.

5.8 Replacing the PSU (AC/DC)When a PSU (AC/DC) has a fault that cannot be rectified in a short period, the PSU needs to bereplaced.

5.9 Replacing the Power Subrack (DC/DC)

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5.1 Replacing BBU3900 Parts

During the BBU3900 maintenance, the following parts of the BBU3900 can be replaced asrequired: the BBU3900 case, BBU3900 boards and module, and optical modules.

NOTE

If two main control boards need to be replaced in a dual-mode base station, you must replace one maincontrol board and wait for the board to resume services before replacing the other main control board.

5.1.1 Query Electronic Label of the BoardBefore replacing a board, you need to query the electronic label of the board at the remote endto confirm the type of board to be replaced.

1. Run the DSP BTSELABEL command on the LMT to query the information of the boardthat is configured on the GSM side or run the LST BRDINFO command on the LMT toquery the information of the board that is configured on the UMTS side or run the DSPBRDMFRINFO command on the LMT to query the information of the board that isconfigured on the LTE side.

2. Confirm the type of board to be replaced according to the Boardtype and Descriptionfields in the queried result. Ensure that the new board is of the same type by checking theinformation 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

5.1.2 Replacing the BBU3900 CaseThe BBU3900 is the core of a base station. The BBU3900 processes the baseband signals of theentire base station and communicates with the RNC/BSC and MRFU/RRU. Replacing aBBU3900 interrupts all the services carried by the base station.

Prerequisitel Tools and materials, such as an ESD wrist strap or ESD gloves and M6 screwdrivers, are

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

case is ready.



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l If a static IP-based GSM base station is used, a PC equipped with an Ethernet cable andthe short message terminal (SMT) application is available. For details about the hardwarerequirements of the PC, see the GSM SMT User Guide .

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

Procedure

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

1. On the NodeB, run the BLK LOCELL command to block all the cells of the NodeB.Modify the ESN on the RNC by referring to the new BBU case. For details, see Creating

NodeB Commissioning Tasks.

2. On the eNodeB, run the BLK CELL command to block all the cells of the eNodeB. Modifythe ESN in the DHCP management interface by referring to the new BBU case. For details,see Creating eNodeB Commissioning Tasks.

3. On the BSC, run the LST GCELL command to query the configuration of all cells of theBTS, an d ru n the SET GCELLADMSTAT command to block these cells. Modify theESN on the BSC by referring to the new BBU case. For details, see Creating GBTSCommissioning Tasks.

NOTE

In a multi-mode base station, the cells of each mode must be blocked respectively.

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

Step 3 Wear an ESD wrist strap or ESD gloves.

WARNING

Take 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 Record all the cable connections on the panels of the boards in the BBU case to be replaced.

Step 5 Disconnect the power cables, transmission cables, CPRI cables, and alarm cables from the panelsof the boards in the BBU case.

Step 6 Loosen the four M6 screws on the BBU case, and remove the BBU case, as shown in Figure5-2 .

Figure 5-2 Removing the BBU case



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Step 7 Remove all the boards in the faulty BBU case, install them in the corresponding slots of the newBBU case, and install filler panels in the vacant slots.

Step 8 Install the new BBU case, tighten the screws on the BBU case to 2 Nm, and reconnect the cables.

Step 9 Power on the BBU. For details, see Powering On the BBU.Step 10 Check the status of the new BBU case by observing the status of indicators on the boards in the

BBU. For details about the status of the indicators, see the related hardware description.

Step 11 If a static IP-based GSM base station is used, perform the following operations:1. Connect the PC providing the SMT application to the ETH port on the GTMU, as shown

in Figure 5-3 .

Figure 5-3 Connecting the GTMU

2. Log in to the SMT, and configure the static IP data. For details, see the GSM SMT User Guide .

3. Disconnect the PC providing the SMT application from the GTMU.

Step 12 Perform the following operations on the local maintenance terminal (LMT):NOTE

Alarms of a GSM+UMTS (GU), GSM+LTE (GL), UMTS+LTE (UL), or GSM+UMTS+LTE (GUL) basestation can be checked and cleared on the LMT of the corresponding standard, that is, the BSC LMT,

NodeB LMT, or eNodeB LMT. For example, alarms of a GU base station are checked and cleared on theBSC LMT or NodeB 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 QueryingAlarm Handling Suggestions.

2. On the GSM side, check whether any alarm is reported on the BSC LMT. For details, seeBrowsing Alarm/Event. If an alarm is reported, clear the alarm by referring to QueryingAlarm/Event Handling Suggestions.

3. On the LTE side, check whether any alarm is reported on the eNodeB LMT. For details,see Browsing Active Alarms or Events. If an alarm is reported, clear the alarm by referringto Querying Alarm or Event Handling Suggestions.

Step 13 Perform the following operations on the M2000:1. On the NodeB, run the UBL LOCELL command to unblock all cells working in UMTS

mode.

2. On the eNodeB, run the UBL CELL command to unblock all cells working in LTE mode.

3. On the BSC, run the SET GCELLADMSTAT command to unblock all cells working inGSM mode.

4. Synchronize the inventory i nformation manually. For details, see Synchronizing InventoryData.

Step 14 Take off the ESD wrist strap or ESD gloves, and pack up all the tools.

----End



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Follow-up Procedurel 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.l Fill in the fault form with detailed information about the replaced component.l Contact the local Huawei office to handle the faulty component.

5.1.3 Replacing the GTMUThe GSM Transmission & Management Unit for BBU (GTMU) is the basic transmission andcontrol function entity of the BBU. It provides the reference clock, power supply port, andexternal alarm collection port, and controls and manages the entire base station.

Prerequisitel 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 5.1.1Query Electronic Label of the Board .

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

l The tools and materials are ready, such as the ESD wrist strap or ESD gloves and M3screwdriver.

l If a static IP-based base station is used, the Ethernet cable and the PC installed with theSMT applica tion are ava ilable. For details about the hardware requirements of the PC, seethe GSM SMT User Guide .

l

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

Contextl Figure 5-4 shows the position of the GTMU in the BBU.

Figure 5-4 Position of the GTMU

GTMU

GTMU

ETH FE0 FE1

CPRI0 CPRI2 CPRI4

CPRI3CPRI1 CPRI5TX RX

TX0 RX0 TX1 RX1 T X2 RX2 TX3 RX3 TX4 RX4 TX5 RX5 LIU0LIU2

LIU1LIU3

USBTST E1/T1 RST

RUNALMACT

1 2 3 4 5

l The board is hot-swappable.l If a multi-mode base station supports co-transmission and the shared ports for co-

transmission are on the GTMU, replacing the GTMU disrupts the services of the other mode. Typical scenario: The GU multi-mode base station supports co-transmission over TDM through the E1/T1 ports on the GTMU board. The UMTS data is transmitted through

the backplane in the manner of TDM over Packet (TOP).



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l On a dual-star GU or GL network, replacing the GTMU influences UMTS services or LTEservices. Specifically, a 20-second influence and a 1-second influence will occur withinfive minutes.

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

the GTMU:

1. On the BSC, run the SET GCELLADMSTAT command to block all the cells of the basestation.

2. If a static IP-based base station is used, run the LST BTSIPRT command to query the IPaddress and route information on the BSC. Otherwise, go to Step 2 .


CAUTION


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

Step 4 Disconnect the transmission cable and CPRI cable from the GTMU. If a surge protection boardis configured, the surge protection transfer cable also needs to be disconnected, as shown inFigure 5-5 .

Figure 5-5 Disconnecting the cable

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

5-6 .

Figure 5-6 Removing the GTMU

12



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Step 6 Set the DIP switches on the new board according to the settings of the DIP switches on the faulty board. If required, query the information about the DIP switch by referring to GTMU.

Step 7 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 Nm, and then reconnect the cables.

Step 8 Check the status of the LEDs to determine whether the new board works properly. For detailsabout the status of the LEDs, see GTMU.

Step 9 If a static IP-based base station is used, perform the following operations:1. Connect the PC installed with the SMT application to the ETH port on the GTMU, as shown

in Figure 5-7 .

Figure 5-7 Connecting the GTMU

2. Log in to the SMT, and then configure the static IP data. For details, see the GSM SMT User Guide .

3. Disconnect the PC installed with the SMT application from the GTMU.

Step 10 Perform following operations on the LMT:1. Query the software version of the board. For details, see the BSC6900 GSM LMT User

Guide . If the software version is the target version, go to step c. If not, go to Step 10.2 .

2. On the LMT, run the LST BTSAUTODLDACTINFO command to check whether theautomatic load and activation of the BTS software is enabled on the BSC. If not, load andactivate the GTMU software and TRXs of the corresponding base station. If yes, go to stepc.


Step 11 Perform following operations on the M2000:1. Run the SET GCELLADMSTAT command to unblock all the cells of the base station.

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

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

----End

Follow-up Procedurel Place the replac ed compon ent 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.l Fill in the fault form to record detailed information of the replaced components.l Contact the local Huawei office to handle the faulty component.



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WARNING


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

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 5-9 .


Step 5 Remove the two M3 screws on the panel, and then pull out the WMPT, as shown in Figure5-10 .

Figure 5-10 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 ne w bo ard, tighten the screws on the board to 0.6 Nm, and then reconnect the cables.

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

2. 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.

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 Node B.




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


----End


into a carton padded with foam or into the packing box of the new component.l Fill in the fault form with the detailed information of the replaced component.l Contact the local Huawei office to handle the faulty component.

5.1.5 Replacing the LMPTThe LTE main processing & transmission unit (LMPT) manages the entire eNodeB system interms of O&M and signaling processing and provides system clock for the BBU3900.




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

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

Contextl Figure 5-11 shows the position of the LMPT in the BBU.

Figure 5-11 Position of the LMPT

TX

SFP0

R X T X

SFP1

RX

USB TST ETH FE/GE0 FE/GE1GPS

RST

RUNALMACT

LMPT

LMPT

l The board is hot-swappable.

Procedure

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



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1. Back up NE configuration data. For details, see the Creating eNodeB CommissioningTasks.

2. On the eNodeB, run the ULD LICENSE command to back up the license file.

3. On the eNodeB, run the BLK CELL command to block all the cells of the eNodeB.


WARNING


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

Step 4 Disconnect the cables from the LMPT, as shown in Figure 5-12 .


Step 5 Remove the two M3 screws on the panel, and then pull out the LMPT, as shown in Figure5-13 .

Figure 5-13 Removing the LMPT

2

1

Step 6 Install a new board, tighten the screws on the board to 0.6 Nm, and then reconnect the cables.

Step 7 Check the status of the new board by observing the status of indi cators. For de tails about thestatus of the indicators, see LMPT.

Step 8 Perform the following operations on the LMT:1. Establish the OM link between the eNodeB and the M2000 by the function of automatically

discovering the eNodeB. Then, download the configuration file and software manually.For details, see Managing eNodeB Software and Data Configuration File.

2. On the LTE side, check whether any alarm is reported on the eNodeB LMT. For details,

see Browsing Active Alarms or Events. If an alarm is reported, clear the alarm by referringto Querying Alarm or Event Handling Suggestions.



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Step 9 Perform the following operations on the M2000:

1. On the eNodeB, run the INS LICENSE command to load the license file.

2. On the eNodeB, run the UBL CELL command to unblock all the cells of the eNodeB.



----End


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

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

5.1.6 Replacing the WBBPThe WCDMA Baseband Process Unit (WBBP) is configured in the BBU and it processes

baseband signals.


If the board can be queried online, run the associated command on the LMT to 5.1.1

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 D ata.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.

Contextl Figure 5-14 shows the position of the WBBP in the BBU.

Figure 5-14 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.



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Procedure

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

1. On the NodeB, run the BLK BRD command to block the WBBP.Step 2 Wear an ESD wrist strap or ESD gloves.

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 5-15 .


Step 5 Remove the two M3 screws on the panel, and then pull out the WBBP, as shown in Figure5-16 .

Figure 5-16 Removing the WBBP

2

1


Step 7 Check the status of the LEDs to determine whether the new board works properly. For detailsabout 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.



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Step 9 Inform the M2000 administrator that the replacement is complete, and then instruct theadministrator to perform the following operations:

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



----End


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.

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

5.1.7 Replacing the LBBPThe LTE BaseBand Processing unit (LBBP) in the BBU3900 processes the baseband signalsand CPRI signals.


If the board can be queried online, run the associated command on the LMT to 5.1.1

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 D ata.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.

Contextl Figure 5-17 shows the position of the LBBP in the BBU.

Figure 5-17 Position of the LBBP

CPRI 0 CPRI 1 CPRI 2 CPRI 3 CPRI 4 CPRI5

T X R X T X R X T X R X TX R XT X R X TX R XLBBP RUNALMACT

LBBP

l The board is hot-swappable.



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Procedure

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

1. On the eNodeB, run the BLK BRD command to block the LBBP.


WARNING


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

Step 4 Disconnect the CPRI cable from the LBBP, as shown in Figure 5-18 .


Step 5 Remove the two M3 screws on the panel, and then pull out the LBBP, as shown in Figure5-19 .

Figure 5-19 Removing the LBBP

2

1


Step 7 Check the status of the LEDs to determine whether the new board works properly. For detailsabout the status of the LEDs, see LBBP.

Step 8 Perform following operations on the LMT:



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Step 9 Perform following operations on the M2000:1. On the eNodeB, run the UBL BRD command to unblock the LBBP.



----End


into a carton padded with foam or into the packing box of the new component.l Fill in the fau lt form to re cord detailed information of the replaced components.l Contact the local Huawei office to handle the faulty component.

5.1.8 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 toovertemperature alarms due to interruption of heat dissipation in the BBU. The services,however, are not affected.





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

Contextl Figure 5-20 shows the position of the FAN unit in the BBU.

Figure 5-20 Position of the FAN unit

FAN



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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 Figure5-21 .

Figure 5-21 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 Nm.Step 4 Check the sta tus o f the LEDs to determine whether the new module works properly. For details

about the status of the LEDs, see FAN.




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 QueryingAlarm Handling Suggestions.



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3. On the LTE side, check whether any alarm is reported on the eNodeB LMT. For details,

see Browsing Active Alarms or Events. If an alarm is reported, clear the alarm by referringto Querying Alarm or Event Handling Suggestions.

Step 6 Perform following operations on the M2000:1. Synchronize the inventory information manually. For details, see Synchronizing Inventory

Data.


----End

Follow-up Procedurel Place the repl aced compo nent into the ESD box or bag. Then, place the ESD box or bag


5.1.9 Replacing the UPEUThe Universal Power and Environment Interface Unit (UPEU) is configured in the BBU and itconverts 48 V DC or +24 V DC power into +12 V DC.






Contextl Figure 5-22 shows the position of the UPEU in the BBU.

Figure 5-22 Position of the UPEU

UPEU



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l Replacing the UPEU disrupts the power supply to the BBU, and accordingly disrupts

services carried by the BBU. Therefore, the UPEU should be replaced within 10 minutes.

Procedure

Step 1 Instruct the M 200 0 administrator to perform the following operations before replacing theUPEU:

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

2. On the eNodeB, run the BLK CELL command to block all the cells working in LTE mode.

3. On the BSC, run the LST GCELL command to query the configuration of all the cells of the base station working in GSM mode, and then run the SET GCELLADMSTATcommand to block these cells.

NOTE

In a multi-mode base station, the cells of each mode should be blocked separately.

CAUTION

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

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


WARNING



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

Figure 5-23 .


Step 6 Remove the two M3 screws on the panel, and then pull out the UPEU, as shown in Figure5-24 .



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Figure 5-24 Removing the UPEU

12


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

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







Step 11 Inform the M2000 administrator that the replacement is complete, and then instruct theadministrator to perform the following operations:

1. On the eNodeB, run the UBL CELL command to unblock all cells working in LTE mode.

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

mode.3. On the BSC, run the SET GCELLADMSTAT command to unblock all cells working in

GSM mode.



----End



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Step 3 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-26 .


Step 4 Remove the two M3 screws on the panel, and then pull out the UEIU, as shown in Figure5-27 .

Figure 5-27 Removing the UEIU

21







3. On the LTE side, check whether any alarm is reported on the eNodeB LMT. For details,see Browsing Active Alarms or Events. If an alarm is reported, clear the alarm by referringto Query ing Alarm or Event Handling Suggestions.

Step 7 Perform following operations on the M2000:1. Synchronize the inventory information manually. For details, see Synchronizing Inventory

Data.


----End



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Step 3 Remove the GPS clock signal cable on the USCU, as shown in Figure 5-29 .


Step 4 Remove the two M3 screws on the panel, and then pull out the USCU, as shown in Figure5-30 .

Figure 5-30 Removing the USCU.

2

1


Step 6 Check the status of the LEDs to determine whether the new board works properly. For detailsabout the status of the LEDs, see USCU.




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 QueryingAlarm H andl ing Suggestions.



Step 8 Perform following operations on the M2000:



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----End



5.1.12 Replacing the UTRPThe Universal Transmission Processing unit (UTRP) in the BBU3900 provides ports for transmission.


If the boa rd can be que ried online, run the associated command on the LMT to 5.1.1Query Electronic Label of the Board .




Contextl Figure 5-31 shows the recommended position of the UTRP in the BBU.

Figure 5-31 Position of the UTRP

RUNALMACT

E1/T1(0-3)

UTRP

E1/T1(4-7)

UTRP

l The board is hot-swappable.l The UTRP supports co-transmission of a multi-mode base station, and the shared ports for

co-transmission are on the UTRP. Therefore, replacing the UTRP disrupts the services of the other mode.



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Procedure

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

1. On the eNodeB, run the BLK CELL command to block all the cells working in LTE mode.2. On the NodeB, run the BLK LOCELL command to block all the cells working in UMTS

mode.

3. On the BSC, run the SET GCELLADMSTAT command to block all cells working inGSM mode.


WARNING



Step 4 Disconnect th e tra nsmission cable from the UTRP. If a surge protection board is configured, thesurge protection transfer cable also needs to be disconnected, as shown in Figure 5-32 .


Step 5 Loosen the two M3 screws on the panel, and then remove the UTRP, as shown in Figur e5-33 .

Figure 5-33 Removing the UTRP



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Step 6 Set the DIP switches on the new board according to the settings of the DIP switches on the faulty 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 detailsabout the status of the LEDs, see UTRP.




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.2. On the GSM side, check whether any alarm is reported on the BSC LMT. For details, see

Browsing Alarm/Event. If an alarm is reported, clear the alarm by referring to QueryingAlarm/Event Handling Suggestions.


Step 10 Perform following operations on the M2000:1. On the eNodeB, run the UBL CELL command to unblock all cells working in LTE mode.

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

mode.3. On the BSC, run the SET GCELLADMSTAT command to unblock all cells working in

GSM mode.



----End



5.1.13 Replacing the UBRIReplacing the Universal BaseBand Radio Interface Board (UBRI) disrupts all the servicescarried on the boa

bts3900 (ver.b) site maintenance guide(07)(pdf)-en

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