BTS3900 Site Maintenance Guide (V100R002_04)

BTS3900

V100R002

Site Maintenance Guide

Issue 04

Date 2010-01-20

Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For anyassistance, please contact our local office or company headquarters.

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

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Copyright © Huawei Technologies Co., Ltd. 2010. 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 the property of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe 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 thepurchase 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 Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

http://www.huawei.com

mailto:[email protected]

Contents

About This Document.....................................................................................................................1

1 Changes in the BTS3900 Site Maintenance Guide..............................................................1-1

2 Preparations for Base Station Site Maintenance..................................................................2-1

3 Hardware Items of BTS3900 Routine Maintenance............................................................3-13.1 Maintenance Items of the Equipment Room Environment.............................................................................3-23.2 Power Supply and Grounding System Maintenance Items.............................................................................3-33.3 Maintenance of the Main Components...........................................................................................................3-4

4 Powering On/Off the BTS3900................................................................................................4-14.1 Powering On the BTS3900.............................................................................................................................4-24.2 Powering Off the BTS3900.............................................................................................................................4-5

5 Replacing BTS3900 Components............................................................................................5-15.1 Replacing BBU3900 Parts..............................................................................................................................5-3

5.1.1 Querying Board Information..................................................................................................................5-45.1.2 Replacing the BBU3900.........................................................................................................................5-45.1.3 Replacing the GTMU.............................................................................................................................5-55.1.4 Replacing a WMPT................................................................................................................................5-85.1.5 Replacing a WBBP.................................................................................................................................5-95.1.6 Replacing the FAN Unit.......................................................................................................................5-105.1.7 Replacing the UPEU............................................................................................................................5-125.1.8 Replacing the UEIU.............................................................................................................................5-145.1.9 Replacing the USCU............................................................................................................................5-165.1.10 Replacing a UTRP..............................................................................................................................5-175.1.11 Replacing the UBRI...........................................................................................................................5-195.1.12 Replacing the Optical Module............................................................................................................5-19

5.2 Replacing the RFU........................................................................................................................................5-225.3 Replacing a DCDU-01 Module.....................................................................................................................5-255.4 Replacing the Fan Box..................................................................................................................................5-275.5 Replacing the Power Subrack (AC/DC)........................................................................................................5-295.6 Replacing the PMU.......................................................................................................................................5-325.7 Replacing the PSU (AC/DC).........................................................................................................................5-345.8 Replacing the Power Subrack (DC/DC)........................................................................................................5-36

BTS3900Site Maintenance Guide Contents

Issue 04 (2010-01-20) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

i

5.9 Replacing the PSU (DC/DC).........................................................................................................................5-38

ContentsBTS3900


ii Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Issue 04 (2010-01-20)

Figures

Figure 4-1 Panel of the DCDU-01.......................................................................................................................4-2Figure 5-1 A label containing the bar code..........................................................................................................5-4Figure 5-2 Position of the GTMU........................................................................................................................5-6Figure 5-3 Disconnecting cables..........................................................................................................................5-6Figure 5-4 Removing the GTMU.........................................................................................................................5-7Figure 5-5 Connecting the GTMU.......................................................................................................................5-7Figure 5-6 Position of the FAN unit...................................................................................................................5-11Figure 5-7 Removing the FAN unit...................................................................................................................5-11Figure 5-8 Position of the UPEU.......................................................................................................................5-12Figure 5-9 Disconnecting cables........................................................................................................................5-13Figure 5-10 Removing the UPEU......................................................................................................................5-13Figure 5-11 Position of the UEIU......................................................................................................................5-14Figure 5-12 Disconnecting cables......................................................................................................................5-15Figure 5-13 Removing the UEIU.......................................................................................................................5-15Figure 5-14 Position of the USCU.....................................................................................................................5-16Figure 5-15 Disconnecting cables......................................................................................................................5-17Figure 5-16 Removing the USCU......................................................................................................................5-17Figure 5-17 Position of the optical module........................................................................................................5-20Figure 5-18 Disconnecting cables......................................................................................................................5-21Figure 5-19 Removing the optical module.........................................................................................................5-21Figure 5-20 Removing an RFU..........................................................................................................................5-23Figure 5-21 Position where the RFU handle key is placed................................................................................5-24Figure 5-22 Removing the protection cover.......................................................................................................5-26Figure 5-23 Removing the screws on the two mounting ears of the module.....................................................5-26Figure 5-24 Position of the fan box switch........................................................................................................5-28Figure 5-25 Raising the adjustable cable trough ...............................................................................................5-28Figure 5-26 Removing the fan box.....................................................................................................................5-29Figure 5-27 Removing the PMU or PSU (AC/DC)...........................................................................................5-31Figure 5-28 Removing the screws on the mounting ears...................................................................................5-32Figure 5-29 Removing the PMU........................................................................................................................5-33Figure 5-30 Set the DIP switch..........................................................................................................................5-34Figure 5-31 Installation procedure of the PMU.................................................................................................5-34Figure 5-32 Removing the PSU (AC/DC).........................................................................................................5-35

BTS3900Site Maintenance Guide Figures


iii

Figure 5-33 Installing the PSU (AC/DC)...........................................................................................................5-35Figure 5-34 Removing the PSU (DC/DC).........................................................................................................5-37Figure 5-35 Removing the screws on the mounting ears...................................................................................5-37Figure 5-36 Removing the PSU (DC/DC).........................................................................................................5-38Figure 5-37 Installing the PSU (DC/DC)...........................................................................................................5-39

FiguresBTS3900


iv Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Issue 04 (2010-01-20)

Tables

Table 3-1 Maintenance items of the equipment room environment.....................................................................3-2Table 3-2 Routine maintenance items for the power supply and grounding system............................................3-3Table 3-3 Maintenance items of the main components in the cabinet.................................................................3-4Table 4-1 Power switches on the DCDU-01........................................................................................................4-2Table 4-2 Indication of normal power supply to the components........................................................................4-3Table 4-3 Troubleshooting...................................................................................................................................4-4

BTS3900Site Maintenance Guide Tables


v

About This Document

PurposeThis document describes the routine hardware maintenance items of the BTS3900. Themaintenance items are equipment room environment maintenance, power and grounding systemmaintenance, and cabinet maintenance. This document also describes the procedures forreplacing components, modules, and boards.

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

Product Name Product Version

BTS3900 V100R002

Intended AudienceThis document is intended for:

l System engineers

l Site maintainers

Organization1 Changes in the BTS3900 Site Maintenance Guide

This describes the changes in the BTS3900 Site Maintenance Guide.

2 Preparations for Base Station Site Maintenance

This describes the preparations for base station site maintenance. The preparations for sitemaintenance involve obtaining site information, selecting maintenance items, and arrangingmaintenance tools and spare parts.

BTS3900Site Maintenance Guide About This Document


1

3 Hardware Items of BTS3900 Routine Maintenance

This describes the routine maintenance for the hardware items in the cabinet. The hardware itemsthat are routinely maintained refer to the equipment room environment of the BTS3900, powersupply and grounding system, and main components in the BTS3900.

4 Powering On/Off the BTS3900

This describes how to power on or power off the BTS3900 during the maintenance of theBTS3900. When you power on the equipment, comply with related procedure and rules. Whenyou power off the equipment, determine whether to perform normal power-off or emergencypower-off according to field requirements.

5 Replacing BTS3900 Components

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

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.

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

OrganizationBTS3900


2 Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Issue 04 (2010-01-20)


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.

BTS3900Site Maintenance Guide Organization


3

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 thepointer to a certain position.

OrganizationBTS3900


4 Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Issue 04 (2010-01-20)

1 Changes in the BTS3900 Site MaintenanceGuide

This describes the changes in the BTS3900 Site Maintenance Guide.

04 （2010-01-20）This is the third commercial release.

Compared with issue 03 (2009-12-28), this issue incorporates the following changes:l All of the Prerequisite and Postrequisite are changed.

This is the second commercial release.

Compared with issue 02 (2009-10-15), this issue incorporates the following changes:

l 5.8 Replacing the Power Subrack (DC/DC) is added.

l 5.9 Replacing the PSU (DC/DC) is added.

02 (2009-10-15)This is the first commercial release.

01 (2009-07-20)This is the initial release.

BTS3900Site Maintenance Guide 1 Changes in the BTS3900 Site Maintenance Guide


1-1

2 Preparations for Base Station SiteMaintenance

This describes the preparations for base station site maintenance. The preparations for sitemaintenance involve obtaining site information, selecting maintenance items, and arrangingmaintenance tools and spare parts.

Obtaining Site InformationBefore you maintain the base station site, obtain the following information:

l Unsolved faults and alarms

l Hardware configurations

l Local environment

l Spare parts

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

l Maintaining the equipment room environment of the base station

l Maintaining power supply and grounding system of the base station

l Maintaining the main components in the base station

l Maintaining the antenna system of the base station

Arranging Maintenance Tools and Spare PartsArrange 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 The frequency test devices, which involve a frequency generator and a spectrum analyzer.

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

BTS3900Site Maintenance Guide 2 Preparations for Base Station Site Maintenance


2-1

l The antenna and feeder test devices are used to test the Voltage Standing Wave Ratio(VSWR), return loss, and cable insertion loss, and also to locate faults. The commonly usedantenna and feeder test device is the SiteMaster.

l Other devices– Multimeter

– Diagnosis tools for maintenance and test devices for robustness of the base station

– Local Maintenance Terminal (LMT)

– Rubidium clock (used to locate the clock of the base station)

– Spare parts

NOTE

When some parts are faulty and need to be replaced, prepare appropriate tools and new parts forreplacement.

2 Preparations for Base Station Site MaintenanceBTS3900


2-2 Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Issue 04 (2010-01-20)

3 Hardware Items of BTS3900 RoutineMaintenance

About This Chapter

This describes the routine maintenance for the hardware items in the cabinet. The hardware itemsthat are routinely maintained refer to the equipment room environment of the BTS3900, powersupply and grounding system, and main components in the BTS3900.

3.1 Maintenance Items of the Equipment Room EnvironmentThis provides the maintenance items, maintenance intervals, operation instructions, andreference standards of the equipment room environment.

3.2 Power Supply and Grounding System Maintenance ItemsThis provides the maintenance items, maintenance intervals, operation instructions, andreference standards for the power supply and grounding system of the base station.

3.3 Maintenance of the Main ComponentsThis describes the maintenance items, maintenance intervals, operating instructions, andreference standards of the main components in the cabinet.

BTS3900Site Maintenance Guide 3 Hardware Items of BTS3900 Routine Maintenance


3-1

3.1 Maintenance Items of the Equipment RoomEnvironment

This provides the maintenance items, maintenance intervals, operation instructions, andreference standards of 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 Operating Instruction Reference Standard

Checkingenvironmentalalarms

Daily Check whether powersupply alarms, fire alarms,or smoke alarms arereported.

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

Checking thetemperature inthe equipmentroom

Weekly Record the temperature readon the thermometer in theequipment room.

Normal temperature range:-20°C to +55°C

Checking thehumidity in theequipmentroom

Weekly Record the humidity read onthe hygrometer in theequipment room.

Normal humidity range:5% to 95%

Checking theillumination inthe equipmentroom

Every twomonths

Check whether the routineand emergency illuminationin the equipment room isnormal.

-

Checking the airconditioner

Every twomonths

Check whether the airconditioner is workingnormally.

-

Checkingprotectivedevices

Every twomonths

Check whether anti-disasterdevices, equipmentprotection devices, and fire-protection devices are ingood condition.

l The foam extinguisher ordry powder fireextinguisher is installedin the equipment room.The pressure and validityperiod of theextinguisher meet therequirements.

l There is no danger ofdamage to the equipmentby rats or insects.

3 Hardware Items of BTS3900 Routine MaintenanceBTS3900



Issue 04 (2010-01-20)


Cleaning theequipmentroom

Every twomonths

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

All the items to be checkedare clean.

3.2 Power Supply and Grounding System MaintenanceItems

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

Table 3-2 lists the routine maintenance items for the power supply and grounding system.

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

Item Interval OperatingInstruction

Reference Standard

Checking powercables

Monthly Check the connectionsof power cablescarefully.

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

Checking thevoltage

Monthly Measure the voltage ofthe power supply byusing a multimeter.

The voltage is withinnormal range.

Checking PGNDcables

Monthly Check whether thePGND cable andgrounding bar areconnected properly.

The connections of thePGND cable are sound. Itis not aging. Theconnection points aresound with no corrosionon them.

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

The grounding resistanceof the cabinet is smallerthan 10 ohms.

Checking thestorage batteries

Annually Check the storagebatteries and rectifiersevery year.

The battery capacity iswithin normal range andthe batteries are correctlyconnected. Theperformance parametersof rectifiers are normal.



3-3

3.3 Maintenance of the Main ComponentsThis describes the maintenance items, maintenance intervals, operating instructions, andreference standards of the main components in the cabinet.

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

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


Checking thefans

Monthly Check whether the fans areoperational.

The fans work properlywithout exceptionalsounds generated byfrictions between theblades of the fan and thesubrack.

CheckingLEDs on theboards

Monthly Check whether the LEDs on theboards are normal.

For details about thestatus of LEDs, see thehardware descriptionabout the correspondingboards.

Checking theair filter

Quarterly If there is too much dust on theair filter, clean the air filter.

-

Checking theexterior of thecabinet

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

-

Checking thelock and doorof the cabinet

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

-

Checking thecleanness ofthe cabinet

Quarterly Check whether the cabinet isclean.

The cabinet surface isclean. The subracks arenot dusty.

Checking theESD wriststrap

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

to test the ESD wrist strap.l Use a multimeter to test the

earth resistance of the ESDwrist strap.

l If you are using anESD wrist strap tester,the LED GOOD is on.

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

Checking thefan box

Annually If there is too much dust on thesurface of or inside the fan box,clean the fan box.

-

3 Hardware Items of BTS3900 Routine MaintenanceBTS3900



Issue 04 (2010-01-20)



3-5

4 Powering On/Off the BTS3900

About This Chapter

This describes how to power on or power off the BTS3900 during the maintenance of theBTS3900. When you power on the equipment, comply with related procedure and rules. Whenyou power off the equipment, determine whether to perform normal power-off or emergencypower-off according to field requirements.

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

4.2 Powering Off the BTS3900You can power off the BTS3900 by using two methods: normal power-off and emergency power-off. You need to perform the normal power-off before an equipment swap or a foreseeableregional blackout. You need to perform the emergency power-off when a fire, smoke, or waterimmersion occurs in the equipment room.

BTS3900Site Maintenance Guide 4 Powering On/Off the BTS3900


4-1

4.1 Powering On the BTS3900This describes how to power on the BTS3900 and handle the power supply failure of internalcomponents 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 SupplyRequirements 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.

Context

Figure 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

4 Powering On/Off the BTS3900BTS3900



Issue 04 (2010-01-20)

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 internalcomponents 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 is steady green or blinks green (ON for 1sand OFF for 1s).

WMPT The RUN LED is steady green or blinks green (ON for 1sand OFF for 1s).



4-3

Component Indication of Normal Power Supply

FAN unit The STATE LED blinks green (ON for 1s and OFF for1s).

UPEU The RUN LED is steady green.

WBBP The RUN LED is steady green or blinks green (ON for 1sand OFF for 1s).

UBRI The RUN LED blinks green (ON for 1s and OFF for 1s).

Fan 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(ON for 1s and OFF for 1s).

PMU The RUN LED blinks green (ON for 1s and OFF for 1s)or (ON for 0.125s and OFF for 0.125s).

PSU(AC/DC)PSU(DC/DC)

Power input LED is steady green.

Step 8 If the power supply to the components fails after the cabinet 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 powercables are inversely connected.l If the cable connection is wrong, set all the

power switches to OFF, and then reconnectthe power cables.

l If the cable connection is correct, replacethe DCDU-01.




Issue 04 (2010-01-20)

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 backplaneare distorted, broken, or missing. Replacethe subrack if necessary.

2. Insert the board into the subrack, and checkthe LED on the board.

3. If the status of the LED indicates an error,remove the board, insert it into another idleslot that can house the board of the sametype, 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 othercomponent 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 switches onthe DCDU-01 to OFF, and thenreconnect the power cables.

– If the power cables are securelyconnected, replace the DCDU-01because the power switches on theDCDU-01 might be faulty, or replacethe power cables.

.

----End

4.2 Powering Off the BTS3900You can power off the BTS3900 by using two methods: normal power-off and emergency power-off. You need to perform the normal power-off before an equipment swap or a foreseeableregional blackout. You need to perform the emergency power-off when a fire, smoke, or waterimmersion occurs in the equipment room.



4-5

Procedurel Perform the normal power-off.

1. Modify the management status to block all the RFUs in the cabinet.2. Set all the DC power switches on the DCDU 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.

CAUTIONEmergency power-off may lead to damage on 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 ifthe 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




Issue 04 (2010-01-20)

5 Replacing BTS3900 Components

About This Chapter

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

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 for WCDMA, BBU3900 boards andmodule for GSM, and optical modules.

5.2 Replacing the RFURFU is radio frequency unit. The replacement of the RFU disrupts the services carried on it.

5.3 Replacing a DCDU-01 ModuleThe DCDU-01, installed under the BBU, supplies DC power for the cabinet. Replacing theDCDU-01 disrupts the services carried on the corresponding cabinet.

5.4 Replacing the Fan BoxThe fan box works with the air inlet box in the cabinet to form a ventilation path, and providesforced ventilation. Replacing the fan box may result in over-temperature alarms due tointerruption of heat dissipation for the cabinet but has no negative effect on services of the basestation. It takes about 20 minutes to replace a fan box.

5.5 Replacing the Power Subrack (AC/DC)The power subrack (AC/DC), which is located in the lower part of the BTS3900 cabinet, providespower input and output ports. Replacing the power subrack (AC/DC) disrupts all services carriedby the BTS.

5.6 Replacing the PMUThe PMU performs the power system management, power distribution detection, and alarmreporting functions. Replacing the PMU does not affect the services.

5.7 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. Replacing the PSU (AC/DC) causes power-off of the BTS cabinet and thus disruptsall services carried by the BTS.

5.8 Replacing the Power Subrack (DC/DC)

BTS3900Site Maintenance Guide 5 Replacing BTS3900 Components


5-1

The power subrack (DC/DC), which is located in the lower part of the BTS3900 cabinet, providespower input and output ports. Replacing the power subrack (DC/DC) disrupts all services carriedby the BTS.

5.9 Replacing the PSU (DC/DC)When a PSU (DC/DC) has a fault that cannot be rectified in a short period, the PSU needs to bereplaced. Replacing the PSU (DC/DC) maybe causes power-off of the BTS cabinet and thusdisrupts all services carried by the BTS.

5 Replacing BTS3900 ComponentsBTS3900



Issue 04 (2010-01-20)

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 for WCDMA, BBU3900 boards andmodule for GSM, and optical modules.

5.1.1 Querying Board InformationBefore replacing a board, you need to query the board information at the remote end to confirmthe type of board to be replaced.

5.1.2 Replacing the BBU3900The BBU3900, which is a core module of the base station, processes baseband signals of theentire BTS system and provides transport interfaces for communication between the BBU3900and other NEs and modules, namely, RNC/BSC and MRFU/RRU. Replacing a BBU3900disrupts all the services carried by the base station.

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,maintenance port, and external alarm collection port, and controls and manages the entire basestation.

5.1.4 Replacing a WMPTThe WCDMA Main Processing and Transmission unit (WMPT) is the main control andtransmission board of the BBU. Replacing the WMPT may disrupt all the services carried bythe NodeB.

5.1.5 Replacing a WBBPThe WCDMA Baseband Process Unit (WBBP) is used to process baseband signals. Replacinga WBBP disrupts all the services carried on the WBBP.

5.1.6 Replacing the FAN UnitThe FAN unit is located in the BBU. The unit and the air inlet box form a ventilation loop, whichensures ventilation and heat dissipation. Replacing the FAN unit may lead to overtemperaturealarms due to interruption of heat dissipation in the BBU. The services, however, are not affected.

5.1.7 Replacing the UPEUThe Universal Power and Environment Interface Unit (UPEU) in the BBU provides -48 V DCor +24 V DC input power to the boards in the BBU.

5.1.8 Replacing the UEIUThe Universal Environment Interface Unit (UEIU) provides channels for transmitting themonitoring signals from the service board to the BBU.

5.1.9 Replacing the USCUThe Universal Satellite card and Clock Unit (USCU) in the BBU receives clock signals such asthe GPS, RGPS, BITS, and M-1PPS signals. In addition, it transmits or receives 1PPS+TODclock signals.

5.1.10 Replacing a UTRPThe Universal Transmission Processing unit (UTRP) is the BBU transmission extension board.Replacing the UTRP may disrupt all the services carried on the base station.

5.1.11 Replacing the UBRI



5-3

This describes how to replace the Universal BaseBand Radio Interface Board (UBRI). Replacingthe UBRI disrupts all the services carried on the board.

5.1.12 Replacing the Optical ModuleThe optical module implements optical-electrical conversion, thus enabling optical transmissionbetween the BBU and other devices. You need to remove the optical cable before replacing theoptical module. Replacing the optical cable disrupts the transmission of CPRI signals.

5.1.1 Querying Board InformationBefore replacing a board, you need to query the board information at the remote end to confirmthe 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.

2. Confirm the type of the board to be replaced according to the Boadtype and Descriptionfields in the query 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 BBU3900The BBU3900, which is a core module of the base station, processes baseband signals of theentire BTS system and provides transport interfaces for communication between the BBU3900and other NEs and modules, namely, RNC/BSC and MRFU/RRU. Replacing a BBU3900disrupts all the services carried by the base station.

Prerequisitel The quantity and types of faulty BBU3900 are confirmed, and new BBU3900 are ready.

l The installation positions of the faulty BBU3900 and the interconnection relations of thecables on the BBU3900 panels are recorded.

l The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, screwdriver,ESD box or bag, dustfree cloth, and key to the cabinet door are ready.

Procedure

Step 1 Power off the BBU3900 by referring to Powering Off the BBU3900, and turn off the powerswitch of the external power supply to the BBU3900.




Issue 04 (2010-01-20)

Step 2 Label the BBU3900 cables, disconnect them, and then take insulation measures for the cables.

Step 3 Use the Phillips screwdriver to remove the four panel screws.

Step 4 Pull the faulty BBU3900 out of the cabinet.

Step 5 Insert a new BBU3900 into the slot. Then, push the new BBU3900 until it is in position.

Step 6 Tighten the panel screws to secure the new BBU3900.

Step 7 Connect the cables to the ports on the new BBU3900 panel based on the labels.

Step 8 Turn on the power switch of the external power supply to the BBU3900. Then, power on theBBU3900 by referring to Powering on the BBU3900.

Step 9 Check the software and BootROM version on the NodeB LMT. Check the software on the BTSLMT.

Step 10 Use the reset command to reset the NodeB and BTS on both the NodeB LMT and the BTS LMT.

----End

Postrequisite

After replacing the faulty BBU3900, check the following items:

l The related alarms on the LMT or M2000 are cleared.

l A UE can access the cell carried by the BBU3900.

Contact the local Huawei office to dispose of the faulty BBU3900.

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,maintenance port, and external alarm collection port, and controls and manages the entire basestation.

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

are ready.

l The quantity and type of board to be replaced are confirmed. For details, see 5.1.1 QueryingBoard Information.

l If the base station is based on the static IP transmission, the FE cable and PC installed withthe SMT application are available. For details about the hardware requirements of the PC,see the GSM SMT User Guide.

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

Contextl Figure 5-2 shows the position of the GTMU in the BBU.



5-5

Figure 5-2 Position of the GTMU

GTMU

GTMU

ETH FE0 FE1

CPRI0 CPRI2 CPRI4

CPRI3CPRI1 CPRI5TX RX

TX0 RX0 TX1 RX1 TX2 RX2 TX3 RX3 TX4 RX4 TX5 RX5 LIU0LIU2

LIU1LIU3

USB TST E1/T1 RST

RUNALMACT

1 2 3 4 5

l The board is hot-swappable.

l Replacing the GTMU disrupts all the services carried by the base station. Therefore, theGTMU should be replaced within 20 minutes.

Procedure

Step 1 Instruct the M2000 administrator to perform the following preparations for the replacement ofthe GTMU:

1. Back up the service data or transfer the service carried by the component to be replaced ifrequired.

2. Run the BLK CELL command to block all the cells in the base station.

Step 2 If the base station is base on the static IP transmission, query the IP address and route informationof the base station on the BSC. Otherwise, go to Step 3.

Step 3 Wear an ESD wrist strap or a pair of ESD gloves.

CAUTIONTake proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESDgloves, to prevent electrostatic damage to the boards, modules, or electronic components.

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

Step 5 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 5-3.

Figure 5-3 Disconnecting cables

Step 6 Loosen the two M3 screws on the panel, and then remove the GTMU, as shown in Figure 5-4.




Issue 04 (2010-01-20)

Figure 5-4 Removing the GTMU

12

Step 7 Set the DIP switch on the new board according to the settings of the DIP switch on the faultyboard. If required, query the information about the DIP switch by referring to GTMU.

Step 8 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6N·m, and then reconnect the cables.

Step 9 Check whether the new board is functional according to the status of the LEDs on the board.For details about the status of the LEDs, see GTMU.

Step 10 If the base station is based on the static IP transmission, perform the following operations:

1. Connect the PC installed with the SMT application to the ETH port on the GTMU, as shownin Figure 5-5.

Figure 5-5 Connecting the GTMU

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

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

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

1. Query the software version of the board. For details, see the LMT User Guide. If the softwareversion is the target version, go to Step 11.3. If not, go to Step 11.2.

2. On the LMT, run the LST BTSAUTODLDACTINFO command to query whetherautomatic load and activation of the BTS software version is enabled on the BSC. If not,load and activate the software versions of the GTMU and TRXs of the corresponding basestation. If yes, go to Step 11.3.

3. Run the UBL CELL command to unblock all the cells in the base station.

4. Check and ensure that no alarm related to the board is generated.

5. Manually synchronize the inventory information. For details, see the M2000 OperatorGuide.



5-7

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

----End

Postrequisitel 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 the details of the replaced component.

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

5.1.4 Replacing a WMPTThe WCDMA Main Processing and Transmission unit (WMPT) is the main control andtransmission board of the BBU. Replacing the WMPT may disrupt all the services carried bythe NodeB.

Prerequisitel The status of the LEDs on the faulty WMPT and cable connections on the panel are

recorded.l Obtain the board operation logs and history alarms prior to the generation of the alarm.

l The quantity and types of faulty WMPTs are confirmed, and new WMPTs are ready.

l Obtain the board operation log.

l The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, screwdriver,ESD box or bag, dustfree cloth, and key to the cabinet door are ready.

Contextl The WMPT is hot swappable.

l The BBU is configured with one active WMPT. Replacing the WMPT disrupts all theservices carried by the NodeB.

l The BBU is configured with one active WMPT and one standby WMPT. When the activeWMPT is being replaced, an active/standby switchover is performed automatically. Afterthe switchover is successful, the standby WMPT becomes the active WMPT and takes overthe services, and the new WMPT becomes the standby WMPT. Powering off the NodeBis not required during replacement. Replacing the standby WMPT does not disrupt theservices. When replacing the board, do not power off the NodeB. You only need to removethe faulty board, and then insert a new board into the original slot.

CAUTIONThe active/standby switchover may result in NodeB resetting or service disruption.

Procedure

Step 1 On the NodeB LMT, run the ULD CFGFILE command to upload the NodeB data configurationfile to the LMT computer.




Issue 04 (2010-01-20)

Step 2 Remove the faulty WMPT.1. Attach temporary labels to the cables on the faulty WMPT, and then disconnect the cables.2. Loosen the screws on the panel of the faulty WMPT.3. Turn the ejector lever outwards, and then pull the faulty WMPT out of the slot.4. Place the faulty WMPT in an ESD bag.

Step 3 Install a new WMPT.1. Insert a new WMPT into the slot, and then slide the board until it is in position.2. Turn the ejector lever inwards, and then tighten the screws on the panel of the new WMPT.3. Connect the cables to the ports on the panel of the new WMPT according to the recorded

cable connections.

Step 4 Run the DLD CFGFILE command to download the backup data configuration files on theNodeB LMT to the new BBU.

Step 5 Check the running status of the new WMPT.

NOTEFor details on the LED of the WMPT, see the WMPT.

Step 6 Check and ensure that the board version is consistent with the latest version in the existingnetwork. If the version is earlier than the version in the existing network, upgrade the software.

----End

Postrequisitel Record the bar code of the replaced board.

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

5.1.5 Replacing a WBBPThe WCDMA Baseband Process Unit (WBBP) is used to process baseband signals. Replacinga WBBP disrupts all the services carried on the WBBP.

PrerequisiteThe tools and materials, such as an ESD wrist strap or a pair of ESD gloves, Phillips screwdriver,ESD box or bag, dustfree cloth, and key to the cabinet door are ready.

ContextThe WBBP is hot swappable.

Procedure

Step 1 On the LMT, run the BLK BRD command to block the faulty WBBP.

Step 2 Remove the faulty WBBP.1. Attach temporary labels to the cables on the faulty WBBP, and then disconnect the cables.2. Loosen the screws on the panel of the faulty WBBP.3. Turn the ejector lever outwards, and then pull the faulty WBBP out of the slot.



5-9

4. Place the faulty WBBP in an ESD bag.

Step 3 Install a new WBBP.

1. Insert a new WBBP into the slot, and then slide the board until it is in position.

2. Turn the ejector lever inwards, and then tighten the screws on the panel of the new WBBP.

3. Connect the cables to the ports on the panel of the new WBBP according to the recordedcable connections.

Step 4 Check the running status of the new WBBP.

NOTEFor details on the LEDs of the WBBP, see the WBBP.

Step 5 Check whether related alarms are reported.

1. On the LMT or M2000 client, run the LST ALMAF command to query active alarms.

2. If active alarms are reported, clear them according to handling suggestions. If no activealarm is reported, go to Step 6.

Step 6 Activate the BootROM or software version of the new WBBP.

1. Run the DSP BRDVER command to check whether the BootROM or software version ofthe new WBBP is correct.

2. If the BootROM or software version is incorrect, run the ACT SOFTWARE command toactivate the BootROM or software version of the board.

Step 7 On the LMT, run the UBL BRD command to unblock the new WBBP.

----End


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

5.1.6 Replacing the FAN UnitThe FAN unit is located in the BBU. The unit and the air inlet box form a ventilation loop, whichensures ventilation and heat dissipation. Replacing the FAN unit may lead to overtemperaturealarms due to interruption of heat dissipation in the BBU. The services, however, are not affected.


are ready.



Contextl Figure 5-6 shows the position of the FAN unit in the BBU.




Issue 04 (2010-01-20)

Figure 5-6 Position of the FAN unit

FAN

l The unit is hot-swappable.

l Replacing the FAN unit may lead to overtemperature alarms due to interruption of heatdissipation in the BBU. Therefore, the FAN unit should be replaced within three minutes.

Procedure



Step 2 Loosen the two M3 screws on the panel, and then remove the FAN unit, as shown in Figure5-7.

Figure 5-7 Removing the FAN unit

1 2

CAUTIONDo not touch the rotating fans to prevent damage to your hands when removing the FAN unit.

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

Step 4 Check whether the new unit is functional according to the status of the LEDs on the unit. Fordetails about the status of the LEDs, see FAN.



5-11

Step 5 Inform the M2000 administrator that the replacement is complete, and then instruct theadministrator to perform the following operations:1. Check and ensure that no alarm related to the unit is generated.2. Manually synchronize the inventory information. For details, see the M2000 Operator

Guide.


----End




5.1.7 Replacing the UPEUThe Universal Power and Environment Interface Unit (UPEU) in the BBU provides -48 V DCor +24 V DC input power to the boards in the BBU.


are ready.l The quantity and type of board to be replaced are confirmed. For details, see 5.1.1 Querying

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

Contextl Figure 5-8 shows the position of the UPEU in the BBU.

Figure 5-8 Position of the UPEU

UPEU

l Replacing the UPEU disrupts the power supply to the BBU, and the services are also

disrupted. Therefore, the UPEU should be replaced within 10 minutes.

Procedure

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




Issue 04 (2010-01-20)

1. Back up the service data or transfer the service carried by the component to be replaced ifrequired.

2. Run the BLK CELL command to block all the cells in the base station.

CAUTIONReplacing the UPEU disrupts all the services carried by the base station if no standby UPEUis configured.


WARNINGTake proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESDgloves, to prevent electrostatic damage to the boards, modules, or electronic components.


Step 4 Disconnect the monitoring cable and alarm cable on the UPEU. as shown in Figure 5-9.


Step 5 Loosen the two M3 screws on the panel, and then remove the UPEU, as shown in Figure5-10.

Figure 5-10 Removing the UPEU

12


Step 7 Check whether the new board is functional according to the status of the LEDs on the board.For details about the status of the LEDs, see UPEU.



5-13


1. Load and activate the software version of the UPEU. For details, see the LMT UserGuide.

2. Run the UBL CELL command to unblock all the cells in the base station.




----End


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 board.

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

5.1.8 Replacing the UEIUThe Universal Environment Interface Unit (UEIU) provides channels for transmitting themonitoring signals from the service board to the BBU.


are ready.



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

Figure 5-11 Position of the UEIU

UEIU


l Replacing the UEIU disrupts the monitoring of the external equipment. Therefore, theUEIU should be replaced within five minutes.




Issue 04 (2010-01-20)

Procedure




Step 3 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-12.


Step 4 Loosen the two M3 screws on the panel, and then remove the UEIU, as shown in Figure 5-13.

Figure 5-13 Removing the UEIU

21






----End



5-15




5.1.9 Replacing the USCUThe Universal Satellite card and Clock Unit (USCU) in the BBU receives clock signals such asthe GPS, RGPS, BITS, and M-1PPS signals. In addition, it transmits or receives 1PPS+TODclock signals.

Prerequisitel The tools and materials, such as an ESD wrist strap or ESD gloves and screwdriver, are

ready.l The quantity and type of board to be replaced are confirmed. For details, see 5.1.1 Querying


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

Figure 5-14 Position of the USCU

USCUUSCUALMALMRUNRUN

ACTACT

TOD1TOD1

GPSRX+ RX- TX+ TX-

BITSGR

EEN IN

YELLO

W O

UT

RGPS

M-1PPS

TOD0

GPSRX+ RX- TX+ TX-

BITSGR

EEN IN

YELLO

W O

UT

RGPS

M-1PPS

TOD0

1S+ 1S- GND PWR1S+ 1S- GND PWR

USCU


Procedure




Step 3 Disconnect the transmission cable and CPRI cable from the USCU. If a surge protection boardis configured, the surge protection transfer cable also needs to be disconnected, as shown inFigure 5-15.




Issue 04 (2010-01-20)


Step 4 Loosen the two M3 screws on the panel, and then remove the USCU, as shown in Figure5-16.

Figure 5-16 Removing the USCU

2

1


Step 6 Check whether the new board is functional according to the status of the LEDs on the board.For details about the status of the LEDs, see USCU.

Step 7 Inform the M2000 administrator that the replacement is complete, and then instruct theadministrator to perform the following operations:1. Load and activate the software version of the USCU. For details, see the LMT User

Guide.2. Check and ensure that no alarm related to the board is generated.3. Manually synchronize the inventory information. For details, see the M2000 Operator

Guide.


----End




5.1.10 Replacing a UTRPThe Universal Transmission Processing unit (UTRP) is the BBU transmission extension board.Replacing the UTRP may disrupt all the services carried on the base station.



5-17

Prerequisite

The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, Phillips screwdriver,ESD box or bag, dustfree cloth, and key to the cabinet door are ready.

Context

l The UTRP is hot swappable.

l The BBU is configured with one active UTRP. Replacing the UTRP disrupts all the servicescarried on the base station.

l The BBU is configured with one active UTRP and one standby UTRP. When the activeUTRP is being replaced, an active/standby switchover is performed automatically. Afterthe switchover is successful, the standby UTRP becomes the active UTRP and takes overthe services, and the new UTRP becomes the standby UTRP. Powering off the eNodeB isnot required during replacement. Replacing the standby UTRP does not disrupt the services.When replacing the board, do not power off the eNodeB. You only need to remove thefaulty board, and then insert a new board into the original slot.

CAUTIONThe active/standby switchover may result in NodeB resetting or service disruption.

Procedure

Step 1 Remove the faulty UTRP.1. Attach temporary labels to the cables on the faulty UTRP, and then disconnect the cables.2. Loosen the screws on the panel of the faulty UTRP.3. Turn the ejector lever outwards, and then pull the faulty UTRP out of the slot.4. Place the faulty UTRP in an ESD bag.

Step 2 Install a new UTRP.1. Insert a new UTRP into the slot, and then slide the board until it is in position.2. Turn the ejector lever inwards, and then tighten the screws on the panel of the new UTRP.3. Connect the cables to the ports on the panel of the new UTRP according to the recorded

cable connections.

Step 3 Check the running status of the new UTRP.

NOTEFor details on the LED of the UTRP, see the UTRP.

----End


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




Issue 04 (2010-01-20)

5.1.11 Replacing the UBRIThis describes how to replace the Universal BaseBand Radio Interface Board (UBRI). Replacingthe UBRI disrupts all the services carried on the board.

PrerequisiteThe tools and materials, such as an ESD wrist strap or gloves, Phillips screwdriver, ESD box orbag, and key to the cabinet door are ready.

ContextThe UBRI is hot-swappable.

It takes about 10 minutes to replace the UBRI, which involves disconnecting the cables,removing the faulty board, installing the new board, reconnecting the cables, and waiting for theservices to resume.

Procedure

Step 1 Attach temporary labels to the cables, and then disconnect the cables.

Step 2 Loosen the screws on the faulty board.

Step 3 Pull the RFU handle, and remove the faulty board from the slot.

Step 4 Put the faulty board into the ESD bag.

Step 5 Unpack the new UBRI, place it into the slot where the faulty board is installed, and then slideit into the slot.

Step 6 Push the RFU handle, and tighten the screws on the new board.

Step 7 Connect the cables according to the temporary labels.

Step 8 Check whether the board is running properly according to the status of the LEDs on the board.

NOTE

For details on the status of the LEDs, see the UBRI.

----End


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

5.1.12 Replacing the Optical ModuleThe optical module implements optical-electrical conversion, thus enabling optical transmissionbetween the BBU and other devices. You need to remove the optical cable before replacing theoptical module. Replacing the optical cable disrupts the transmission of CPRI signals.

Prerequisitel The tools and materials, such as an ESD wrist strap or ESD gloves, are ready.



5-19

l All the types of optical module are ready.


Contextl Figure 5-17 shows the position of the optical module on a board.

Figure 5-17 Position of the optical module

1

(1) Optical module

l The optical module is hot-swappable.

Procedure



Step 2 Choose the optical module of the same type as the faulty optical module according to the labelon the module.

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 faultyoptical module, as shown in Figure 5-18.




Issue 04 (2010-01-20)


WARNINGDo not look into the optical module without eye protection after the optical cable is removedfrom the optical module.

Step 5 Turn the puller on the faulty optical module outwards, hold the puller and take the faulty opticalmodule out of the slot, and then remove the optical module from the BBU, as shown in Figure5-19.

Figure 5-19 Removing the optical module

Step 6 Install the new optical module onto the BBU.



5-21

Step 7 Remove the dustproof caps from the new optical module and optical connector, and then insertthe optical cable connector into the new optical module.


----End



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


5.2 Replacing the RFURFU is radio frequency unit. The replacement of the RFU disrupts the services carried on it.


are ready.



Context

It takes about 10 minutes to replace the RFU.

NOTE

l Take proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESD gloves, toprevent electrostatic damage to the boards, modules, or electronic components.

l The RFU is heavy. Therefore, handle it with caution.

Procedure

Step 1 Locate the faulty RFU, and then run the BLK BRD command on the LMT to block the faultyRFU.

NOTE

Although this step can be performed either remotely or locally, you are advised to perform this stepremotely.

Step 2 Set the corresponding DC output power switch on the panel of the DCDU-01 to OFF.

Step 3 Record the connections of the cables on the RFU, and then disconnect the cables.

Step 4 Use a Phillips screwdriver to loosen the screws at the four corners of the RFU and pull the RFUmodule outwards by 50 to 100 mm by using the handle key, as shown in Figure 5-20. Hold theRFU module with one hand and pull the module out of the cabinet with the other hand.




Issue 04 (2010-01-20)

Figure 5-20 Removing an RFU

NOTE

After the RFU handle key is used, put it in the slot on the right upper corner of the cabinet door, as shownin Figure 5-21.



5-23

Figure 5-21 Position where the RFU handle key is placed

Step 5 Put the removed RFU into an ESD box.

Step 6 Unpack the new RFU, place the new RFU on the corresponding guide rails, and then slide italong the rails until it is in position.

Step 7 Tighten the four captive screws at four corners on the panel of the RFU to fasten the RFU securelyto the subrack.

Step 8 Fix the 7/16-inch DIN male elbow connector of the RF jumper RFU according to the temporarylabel. Then, use a torque wrench to fasten the DIN male elbow connector with the fasteningtorque of 25 N·m to 35 N·m.

Step 9 Insert the connector to the RFU according to the temporary label on the CPRI cable.

Step 10 Install the power cable of the RFU, and then tighten the screws.

Step 11 Set the corresponding DC output power switch on the panel of the DCDU-01 to ON.

Step 12 Activate the BootROM or software version of the RFU.1. Run the DSP BRDVER command on the LMT to query the BootROM and software

versions of the new RFU.2. If the software version is incorrect, run the ACT SOFTWARE command on the LMT to

reactivate the BootROM or software version of the new RFU.

Step 13 Run the UBL BRD command on the LMT to unblock the RFU. Whether to perform this steplocally or remotely depends on the way used in step 1 at the beginning of this procedure. Thatis, perform this step locally if step 1 is performed locally.

----End




Issue 04 (2010-01-20)

Postrequisite1. 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.2. Fill in the fault form with the details of the replaced board.3. Contact the local Huawei office to handle the faulty board.

5.3 Replacing a DCDU-01 ModuleThe DCDU-01, installed under the BBU, supplies DC power for the cabinet. Replacing theDCDU-01 disrupts the services carried on the corresponding cabinet.




ContextIt takes about 20 minutes to replace the DCDU-01.


Procedure

Step 1 Power off the BTS3900 by referring to Powering Off the BTS3900.

Step 2 Mark the cables connected to the output ports on the DCDU-01, and then disconnect them.

Step 3 Use the Phillips screwdriver to remove the protection cover from the external power input wiringterminal block of the DCDU-01, as shown in Figure 5-22.



5-25

Figure 5-22 Removing the protection cover

(1) Protection cover (2) Screw (3) External input power cable

Step 4 Mark the external input power cable for the DCDU-01, and then disconnect the cable.

Step 5 Remove the four M6x12 strews on the two mounting ears of the DCDU-01, as shown in Figure5-23.

Figure 5-23 Removing the screws on the two mounting ears of the module

Step 6 Remove the DCDU-01 module by pulling out the DCDU-01 with one hand, and holding theDCDU-01 with the other hand.

Step 7 Put the faulty DCDU-01 into an ESD box.

Step 8 Install the new DCDU-01 into the position where the original one is located, and then use thefour removed M6x12 screws to fasten the DCDU-01 to the subrack.

Step 9 Insert the OT terminal of the power cable into the corresponding cable hole in the wiring terminalblock. Connect the OT terminal of the -48 V power cable (blue) to the terminal labeled NEG




Issue 04 (2010-01-20)

(-), and then connect the OT terminal of the GND cable (black) to the terminal labeled RTN(+).

Step 10 Place the protection cover on the DCDU-01, and then tighten the screws by using the Phillipsscrewdriver.

Step 11 Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01 panel.

Step 12 Connect the removed cables to the power output ports on the DCDU-01 panel according to themarks.

Step 13 Power on the BTS3900 by referring to Powering On the BTS3900.

----End



5.4 Replacing the Fan BoxThe fan box works with the air inlet box in the cabinet to form a ventilation path, and providesforced ventilation. Replacing the fan box may result in over-temperature alarms due tointerruption of heat dissipation for the cabinet but has no negative effect on services of the basestation. It takes about 20 minutes to replace a fan box.




Context

CAUTIONTake proper ESD prevention measures, for example, wear an ESD wrist strap or gloves to preventthe boards, modules, and electronic components from being damaged by the static electricitygenerated by human body.

Procedure

Step 1 Set the DC distribution switch FAN labeled on the DCDU-01 to OFF. Figure 5-24 shows theposition of the fan box switch on the DCDU-01.



5-27

Figure 5-24 Position of the fan box switch

Step 2 Label the cables on the panel of the fan box and then remove the cables.

Step 3 Loosen the captive screws on both sides of the adjustable cable trough. Then, raise the cabletrough and fix it at the upper mounting hole, as shown in Figure 5-25.

Figure 5-25 Raising the adjustable cable trough

(1) Upper mounting hole (2) Captive screw

Step 4 Remove the four screws from the fan unit, as shown in Figure 5-26.




Issue 04 (2010-01-20)

Figure 5-26 Removing the fan box

Step 5 Pull out the fan box by one-third of its length with one hand, hold the fan box with the otherhand, and then pull the entire fan box out of the cabinet. Put the faulty fan box into a ESD box.

Step 6 Put into the new fan box. Then, secure the four screws.

Step 7 Place the adjustable cable trough to its original position, and then tighten the captive screws onboth sides of the adjustable cable trough.

Step 8 Install the cables to the panel of the fan box based on the labels.

Step 9 Set the fan box switch on the DCDU-01 to ON.

----End



2. Fill in the fault form with the details of the replaced board.

3. Contact the local Huawei office to handle the faulty board.

5.5 Replacing the Power Subrack (AC/DC)The power subrack (AC/DC), which is located in the lower part of the BTS3900 cabinet, providespower input and output ports. Replacing the power subrack (AC/DC) disrupts all services carriedby the BTS.



5-29




ContextIt takes about 25 minutes to replace a power subrack (AC/DC).


Procedure

Step 1 Power off the BTS3900. For details, see 4.2 Powering Off the BTS3900.

Step 2 Mark the cables on panels of the power subrack (AC/DC) and PMU, and then disconnect them.

Step 3 Loosen the screws on the panel of the PMU or PSU (AC/DC), which is located in the powersubrack (AC/DC), as shown in Figure 5-27.




Issue 04 (2010-01-20)

Figure 5-27 Removing the PMU or PSU (AC/DC)

(1) Screws on the panel of the PMU (2) PMU (3) Power subrack

NOTE

Figure 5-27 shows the panel of the PMU. The two screws on the panel of the PSU (AC/DC) are in thesame positions as the screws on the panel of the PMU.

Step 4 Raise the ejector levers on the panel of the PMU or PSU, and pull out the PMU or PSU alongthe slide rails, as shown in Figure 5-27.

Step 5 Repeat steps Step 3 and Step 4 to remove all PMUs or PSUs from the power subrack (AC/DC),and then place the removed PMUs or PSUs into an ESD box.

Step 6 Remove the four M6x12 screws on the two mounting ears of the power subrack (AC/DC), asshown in Figure 5-28.



5-31

Figure 5-28 Removing the screws on the mounting ears

Step 7 Hold the power subrack (AC/DC) with one hand, and pull out the power subrack (AC/DC) withthe other hand.

Step 8 Place the removed power subrack (AC/DC) into an ESD box.

Step 9 Take out the new power subrack (AC/DC), perform the preceding steps in the contrary order toinstall the new power subrack (AC/DC) in the cabinet, and install all removed PMUs or PSUsinto the power subrack (AC/DC).

Step 10 Reconnect the cables to the panels of the power subrack (AC/DC) and PMU according to theoriginal marks.

Step 11 Switch on the external power supply to finish 4.1 Powering On the BTS3900.

----End





5.6 Replacing the PMUThe PMU performs the power system management, power distribution detection, and alarmreporting functions. Replacing the PMU does not affect the services.




Issue 04 (2010-01-20)


are ready.



Context

This module is hot swappable.

CAUTIONTake proper ESD prevention measures, for example, wearing an ESD wrist strap or a pair ofESD gloves, to protect the PMU from electrostatic damage.

Procedure

Step 1 Label the cables on the panel of the PMU, and then disconnect the cables from the PMU.

CAUTIONWhen inserting or removing the DB50 connector of the environment monitoring signal cable,you must hold the connector with both hands and keep it perpendicular to the panel, to preventfalse alarms caused by bent pins.

Step 2 Loosen the screws on the handle of the PMU panel by using a Phillips screwdriver.

Step 3 Pull the handle gently to disconnect the PMU from the subrack, and then remove the PMU fromthe slot, as shown in Figure 5-29.

Figure 5-29 Removing the PMU

Step 4 Put the fault PMU into a ESD box.

Step 5 Set the DIP switch of the new PMU, as shown in Figure 5-30.



5-33

Figure 5-30 Set the DIP switch

Step 6 Loosen the screws on the handle of the PMU. Then, pull the handle outwards.

Step 7 Slide the PMU along the guide rails into the slot and then push the handle back.

Step 8 Tighten the screws on the handle. Figure 5-31 shows the installation procedure of the PMU.

Figure 5-31 Installation procedure of the PMU

Step 9 Connect the cables, which have been disconnected from the PMU, according to the labels.

----End





5.7 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. Replacing the PSU (AC/DC) causes power-off of the BTS cabinet and thus disruptsall services carried by the BTS.




Issue 04 (2010-01-20)




ContextThe module is hot-swappable.

CAUTIONTake proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESDgloves, to prevent electrostatic damage to the modules.

Procedure

Step 1 Use a screwdriver to loosen the screws on the ejector levers of the panel of the PSU (AC/DC).

Step 2 Raise the ejector levers and remove the PSU (AC/DC) from the subrack, as shown in Figure5-32.

Figure 5-32 Removing the PSU (AC/DC)

Step 3 Place the removed PSU (AC/DC) into an ESD box.

Step 4 Use a screwdriver to loosen the screws on the ejector levers of the PSU (AC/DC) and raise theejector levers.

Step 5 Slide the PSU (AC/DC) into the subrack and lower the ejector levers.

Step 6 Tighten the screws on the ejector levers. Figure 5-33 shows the entire installation process.

Figure 5-33 Installing the PSU (AC/DC)



5-35

----End



5.8 Replacing the Power Subrack (DC/DC)The power subrack (DC/DC), which is located in the lower part of the BTS3900 cabinet, providespower input and output ports. Replacing the power subrack (DC/DC) disrupts all services carriedby the BTS.




ContextIt takes about 25 minutes to replace a power subrack (DC/DC).


Procedure

Step 1 Power off the BTS3900 by referring to Powering Off the BTS3900.

Step 2 Mark the cables on panels of the power subrack (DC/DC), and then disconnect them.

Step 3 Loosen the screws on the panel of the PSU, which is located in the power subrack (DC/DC),raise the ejector levers on the panel of the PSU, and pull out the PSU along the slide rails, asshown in Figure 5-34.




Issue 04 (2010-01-20)

Figure 5-34 Removing the PSU (DC/DC)

Step 4 Repeat step Step 3, remove all PSUs from the power subrack (DC/DC), and place the removedPSUs into an ESD box.

Step 5 Remove the four M6x12 screws on the two mounting ears of the power subrack (DC/DC), asshown in Figure 5-35.

Figure 5-35 Removing the screws on the mounting ears

Step 6 Hold the power subrack (DC/DC) with one hand, and pull out the power subrack (DC/DC) withthe other hand.

Step 7 Place the removed power subrack (DC/DC) into an ESD box.

Step 8 Take out the new power subrack (DC/DC), perform the preceding steps in the contrary order toinstall the new power subrack (DC/DC) in the cabinet, and install all removed PSUs into thepower subrack (DC/DC).

Step 9 Reconnect the cables to the panel of the power subrack (DC/DC) according to the original marks.

Step 10 Power on the BTS3900 by referring to Powering On the BTS3900.

----End



5-37



5.9 Replacing the PSU (DC/DC)When a PSU (DC/DC) has a fault that cannot be rectified in a short period, the PSU needs to bereplaced. Replacing the PSU (DC/DC) maybe causes power-off of the BTS cabinet and thusdisrupts all services carried by the BTS.




ContextThe module is hot-swappable.

CAUTIONTake proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESDgloves, to prevent electrostatic damage to the modules.

ProcedureStep 1 Use a screwdriver to loosen the screws on the ejector levers of the panel of the PSU (DC/DC).

Step 2 Raise the ejector levers and remove the PSU (DC/DC) from the subrack, as shown in Figure5-36.

Figure 5-36 Removing the PSU (DC/DC)




Issue 04 (2010-01-20)

Step 3 Place the removed PSU (DC/DC) into an ESD box.

Step 4 Use a screwdriver to loosen the screws on the ejector levers of the PSU (DC/DC) and raise theejector levers.

Step 5 Slide the PSU (AC/DC) into the subrack and lower the ejector levers.

Step 6 Tighten the screws on the ejector levers. Figure 5-37 shows the entire installation process.

Figure 5-37 Installing the PSU (DC/DC)

----End





5-39

Documents

BTS3900 Site Maintenance Guide (V100R002_04)