42828780 bts3900a wcdma site maintenance guide v200 05

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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 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 representations

of any kind, either express or implied

The information in this document is subject to change without notice Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, and

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

Huawei Technologies Co., Ltd.

Bantian, LonggangShenzhen 518129People's Republic of China

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About This Document

Product Version

The following table lists the product version related to this document

BTS3900A WCDMA (hereinafter referred

to as BTS3900A)

V200R010V200R011V200R012

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This describes the changes in the BTS3900A WCDMA 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

3 Routine Maintenance Items for the BTS3900A Hardware

The routine maintenance items for the BTS3900A hardware are the BTS3900A cabinet and theBTS power supply system and grounding system

4 Powering On and Power Off the BTS3900A

When maintaining the BTS3900A, you need to power on and power off the BTS3900A Whenyou power on the BTS3900A, adhere to the related rules When you power off the BTS3900A,choose to perform normal power-off or emergency power-off based on actual situations

5 Replacing BTS3900A Components

Replacing the BTS3900A components involves replacing the BBU3900 components, RFU,DCDU-01, EPS, PMU or PSU, batteries, TEC cooler, AC surge protector, core of the heatexchanger, and heater

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

if not avoided, could result in minor or moderate injury

Indicates a potentially hazardous situation, which if 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

About This Document

BTS3900A WCDMASite Maintenance Guide

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Convention Description

boldface For example, log in as user root.

Italic Book titles are in italics.

Courier New

Command Conventions

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

Italic Command arguments are in italics.

vertical bars One item is selected

vertical bars One item is selected or no item is selected

vertical bars A minimum of one item or a maximum of allitems can be selected

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

vertical bars Several items or no item can be selected

GUI Conventions

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

are in boldface For example, click OK.

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

+A means the three keys should be pressed concurrently.

the two keys should be pressed in turn

quickly without moving the pointer

pointer to a certain position

About This Document

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About This Document iii

1 Changes in the BTS3900A WCDMA Site Maintenance Guide 1-1

2 Preparations for Base Station Site Maintenance 2-1

3 Routine Maintenance Items for the BTS3900A Hardware 3-1

3.1 Power Supply and Grounding System Maintenance Items 3-23.2 Maintenance Items for the BTS3900A 3-2

4 Powering On and Power Off the BTS3900A 4-1

4.1 Powering On the BTS3900A 4-24.2 Powering Off the BTS3900A 4-5

5 Replacing BTS3900A Components 5-1

5.1 Replacing Components of the BBU3900 5-35.1.1 Querying Board Information 5-35.1.2 Replacing the BBU in the 19-Inch Cabinet 5-45.1.3 Replacing the WMPT 5-55.1.4 Replacing the WBBP 5-85.1.5 Replacing the UPEU 5-105.1.6 Replacing the UEIU 5-125.1.7 Replacing the FAN Unit 5-135.1.8 Replacing the UTRP 5-155.1.9 Replacing the USCU 5-165.1.10 Replacing the Optical Module 5-185.2 Replacing SLPU Parts 5-205.2.1 Replacing the SLPU 5-215.2.2 Replacing the UELP 5-225.2.3 Replacing the UFLP 5-245.3 Replacing the Fan Box in the RFC 5-265.4 Replacing the RFU 5-285.5 Replacing the DCDU-01 Module 5-315.6 Replacing the Fan Box in the APM30H 5-345.7 Replacing the PMU 5-365.8 Replacing the PSU 5-40

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5.9 Replacing the EPS Subrack 5-425.10 Replacing the AC Surge Protector 5-445.11 Replacing the Fuse 5-465.12 Replacing the Fan on the Front Door of the APM30H 5-495.12.1 Querying the Type of Fan 5-495.12.2 Replacing the Fan for the Modularized Heat Exchanger Installed on the Front Door 5-495.12.3 Replacing the Fan for the Non-Modularized Heat Exchanger Installed on the Front Door 5-545.13 Replacing the Fan Box in the TMC11H 5-565.14 Replacing the Heater 5-585.15 Replacing the Batteries 5-605.16 Replacing the Fan on the Front Door of the IBBS200D 5-625.17 Replacing the TEC Cooler of the IBBS200T 5-645.18 Replacing the CMUA 5-675.19 Replacing the ELIA 5-71

Contents

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Figure 4-1 Power switches on the EPS 4-2 Figure 4-2 Power switches on the DCDU-01 4-3 Figure 5-1 A label containing the bar code 5-4 Figure 5-2 Removing the BBU 5-5 Figure 5-3 Position of the WMPT in the BBU 5-6 Figure 5-4 Disconnecting cables 5-7 Figure 5-5 Removing the WMPT 5-7 Figure 5-6 Position of the WBBP 5-8 Figure 5-7 Disconnecting the cable 5-9 Figure 5-8 Removing the WBBP 5-9 Figure 5-9 Position of the UPEU 5-10 Figure 5-10 Disconnecting cables 5-11 Figure 5-11 Removing the UPEU 5-11 Figure 5-12 Position of the UEIU 5-12 Figure 5-13 Disconnecting cables 5-13 Figure 5-14 Removing the UEIU 5-13 Figure 5-15 Position of the FAN unit 5-14 Figure 5-16 Removing the FAN unit 5-14 Figure 5-17 Position of the USCU 5-17 Figure 5-18 Disconnecting cables 5-17 Figure 5-19 Removing the USCU 5-17 Figure 5-20 Position of the optical module 5-19 Figure 5-21 Disconnecting cables 5-19 Figure 5-22 Removing the optical module 5-20 Figure 5-23 Position of the SLPU 5-21 Figure 5-24 Removing the SLPU 5-22 Figure 5-25 Position of the UELP 5-23 Figure 5-26 Disconnecting cables 5-23 Figure 5-27 Removing the UELP 5-23 Figure 5-28 Position of the UFLP 5-24 Figure 5-29 Disconnecting cables 5-25 Figure 5-30 Removing the UFLP 5-25 Figure 5-31 Removing the fan box in the RFC 5-27

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Figure 5-32 Taking out the handle 5-29 Figure 5-33 Removing the RFU 5-30 Figure 5-34 Installation position of the DCDU-01 5-32 Figure 5-35 DCDU-01 5-32 Figure 5-36 Top view of the fan box in the APM30H 5-35 Figure 5-37 Removing the fan box from the APM30H 5-35 Figure 5-38 Installation position of the PMU 5-36 Figure 5-39 Removing the PMU 5-37 Figure 5-40 Setting DIP switches 5-38 Figure 5-41 Installing the PMU 5-39 Figure 5-42 Installation position of the PSU 5-40 Figure 5-43 Removing the PSU 5-41 Figure 5-44 Installing the PSU 5-41 Figure 5-45 Replacing the EPS subrack 5-43 Figure 5-46 Installation position of the AC surge protector 5-45 Figure 5-47 Removing the surge protector 5-45 Figure 5-48 Installation position of the fuse and spare fuse box 5-46 Figure 5-49 Position of the extraction tool in the cabinet 5-47 Figure 5-50 Removing the faulty fuse 5-48 Figure 5-51 Taking the spare fuse 5-48 Figure 5-52 Position of the fan in the APM30H 5-50 Figure 5-53 Remove the faulty cable for the fan 5-51 Figure 5-54 Removing the air duct 5-51 Figure 5-55 Removing the heat exchanger 5-52 Figure 5-56 Removing the cover plate of the fan cavity 5-52 Figure 5-57 Removing the faulty fan 5-53 Figure 5-58 Position of the fan in the APM30H 5-54 Figure 5-59 Removing the fan on the front door of the APM30H 5-55 Figure 5-60 Top view of the fan box in the TMC11H 5-57 Figure 5-61 Removing the fan box from the TMC11H 5-57 Figure 5-62 Removing the faulty heater 5-59 Figure 5-63 Installing the new heater 5-59 Figure 5-64 Removing the cover plate on the batteries 5-61 Figure 5-65 Removing cables of the batteries 5-61 Figure 5-66 Installation position of the fan on the front door of the IBBS200D 5-62 Figure 5-67 Removing the fan box of the IBBS200D 5-63 Figure 5-68 Removing the faulty fan 5-64 Figure 5-69 Installation position of the TEC cooler 5-65 Figure 5-70 Removing the retention screws on the CMUA 5-66

Figures

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Figure 5-74 Removing the fan box of the IBBS200D 5-69 Figure 5-75 Removing the CMUA box of the IBBS200T 5-70 Figure 5-76 Positions for pasting the bar codes of the CMUA 5-71 Figure 5-77 Opening the housing of the ELU 5-72 Figure 5-78 Removing the faulty ELIA 5-72

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Table 3-1 Routine maintenance items for the power supply and grounding system 3-2 Table 3-2 Maintenance items for the BTS3900A cabinet 3-3 Table 4-1 Power switches on the EPS 4-2 Table 4-2 Power switches on the DCDU-01 4-3 Table 4-3 Indication of normal power supply to the components 4-4 Table 4-4 Troubleshooting 4-4

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1 Changes in the BTS3900A WCDMA Site

Maintenance Guide

This describes the changes in the BTS3900A WCDMA Site Maintenance Guide.

05 (2010-06-05)

This is the fourth commercial issue

Compared with issue 04 (2010-03-31), this issue includes the following new topics:

l 5.12.1 Querying the Type of Fan

l 5.12.2 Replacing the Fan for the Modularized Heat Exchanger Installed on the Front Door

Compared with issue 04 (2010-03-31), this issue incorporates the following changes:

5.4 Replacing the RFU Some descriptions are optimized

5.1.5 Replacing the UPEU

5.12.3 Replacing the Fan for the Modularized Heat Exchanger Installed on the Front Door

Non-l The title is changed

l 5.12.1 Querying the Type of Fan isadded

Compared with issue 04 (2010-03-31), no information is deleted

04 (2010-03-31)

This is the third commercial release

Compared with issue 03 (2010-03-05), no information is added

Compared with issue 03 (2010-03-05), the known defects are cleared

BTS3900A WCDMA

Site Maintenance Guide

1 Changes in the BTS3900A WCDMA Site Maintenance

Guide

1-1

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03 (2010-03-05)

This is the second commercial release

Compared with issue 02 (2009-12-10), this issue includes the following new topic:

l 5.1.1 Querying Board Information

All of the maintenance operations Some descriptions and figures are optimized

02 (2009-12-10)

This is the first commercial release

Compared with issue 01 (2009-11-20), no information is added

5.11 Replacing the Fuse Prerequisite and Postrequisite are changed.

01 (2009-11-20)

This is the draft release

1 Changes in the BTS3900A WCDMA Site Maintenance

Guide

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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

Obtaining Site Information

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

l Unsolved faults and alarms

l Hardware configurations

l Spare parts

Selecting Maintenance Items

Select 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 Parts

Arrange 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

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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)

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3 Routine Maintenance Items for the

BTS3900A Hardware

About This Chapter

The routine maintenance items for the BTS3900A hardware are the BTS3900A cabinet and theBTS power supply system and grounding system

3.1 Power Supply and Grounding System Maintenance Items

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

3.2 Maintenance Items for the BTS3900A

This section describes the items, checking frequencies, operations, and reference standards forthe maintenance of the BTS3900A cabinet

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3.1 Power Supply and Grounding System Maintenance Items

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

Table 3-1 lists the routine maintenance items for the power supply and grounding system

Table 3-1 Routine maintenance items for the power supply and grounding system

Checking powercables

of power cablescarefully

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

Checking thevoltage

the power supply byusing a multimeter

The voltage is withinnormal range

Checking PGNDcables

PGND cable andgrounding bar areconnected properly

The connections of thePGND cable are sound It

is not aging Theconnection points aresound with no corrosion

on them

resistance by using anelectric earth resistancetester and keep a record

The grounding resistance

of the cabinet is smallerthan 10 ohms

Checking thestorage batteries

batteries and rectifiersevery year

The battery capacity iswithin normal range andthe batteries are correctlyconnected The

performance parameters

of rectifiers are normal

3.2 Maintenance Items for the BTS3900A

This section describes the items, checking frequencies, operations, and reference standards forthe maintenance of the BTS3900A cabinet

3 Routine Maintenance Items for the BTS3900A Hardware

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Table 3-2 Maintenance items for the BTS3900A cabinet

work properly

The fans workproperly without anyabnormal smell orsound

cabinet surface isdamaged andwhether the label onthe cabinet is legible

-Door and lock of thecabinet

lock of the cabinetworks properly andwhether the door can

be opened and closedwithout obstructions

cabinets are clean

The cabinet surface

is clean, and theinside of the cabinet

is not dusty

LEDs on each board Monthly or quarterly Check whether the

LEDs of the modulesand boards inside thecabinet work

signal cables andtransmission cablesinside the cabinet areproperly connected

The connectors ofeach cable are intactand properlyconnected withoutcorrosion or rust Theconnectors arewaterprooftedwithoutcondensation Theenvironmenttemperature shouldnot be greater than 65

°C The jacket of thepower cable is intactand is not aged.BTS3900A WCDMA

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sensor, and thenperform tests on thethreshold of theresponse and otherfunctions.

Check the operatingenvironment

The operatingenvironment is asfollows:

l Temperaturerange:-10oC to+55oC

l No organicsubstances such asalcohol, ether, orketone in the air

l No corrosive gas

in the air

l No smoke stain ingeneral conditions

strap in either of thefollowing ways:

l Use an ESD wriststrap tester to testthe ESD wriststrap

l Use a multimeter

to test the earthresistance of theESD wrist strap

If you use an ESDwrist strap tester, theGOOD LED is ON

If you use amultimeter, the earthresistance is between0.75 megohm and 10megohms

3 Routine Maintenance Items for the BTS3900A Hardware

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4 Powering On and Power Off the BTS3900A

When maintaining the BTS3900A, you need to power on and power off the BTS3900A Whenyou power on the BTS3900A, adhere to the related rules When you power off the BTS3900A,choose to perform normal power-off or emergency power-off based on actual situations

4.1 Powering On the BTS3900A

This describes how to power on the BTS3900A and handle the power supply failure of internalcomponents of the cabinet

4.2 Powering Off the BTS3900A

The BTS3900A can be powered off in two ways: normal power-off and emergency power-off.BTS3900A WCDMA

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4.1 Powering On the BTS3900A

This describes how to power on the BTS3900A and handle the power supply failure of internalcomponents of the cabinet

Prerequisite

l If the BTS3900A uses external power supply, the external AC input power cables should

be properly installed before power-on

l The power supply to the BTS3900A meets the requirements of the power system

l The power switches on the EPS and DCDU are all set to OFF

l The external power supply to the BTS3900A is cut off

l Boards, modules, and cables in the cabinet are installed

Context

Figure 4-1 shows the power switches on the EPS

Figure 4-1 Power switches on the EPS

Table 4-1 describes the power switches on the EPS

Table 4-1 Power switches on the EPS

to the SOU or heater)

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Figure 4-2 shows the power switches on the DCDU-01.

Figure 4-2 Power switches on the DCDU-01

Table 4-2 describes the power switches on the DCDU-01

Table 4-2 Power switches on the DCDU-01

Step 1 Check the resistance between the external power supply and the earth by using a multimeter.

Ensure that no short circuit exists

Step 2 Turn on the external power switch to power on the cabinet.

Step 3 Perform the power-on check on the power subrack.

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Power-on check involves high-voltage operations Direct contact with high-voltage wires orindirect contact through damp objects may be fatal

NOTE

For details on the status of the LEDs on the PMU and PSU, see PMU and PSU (AC/DC) respectively.

Step 4 Turn on the power switches on the EPS and DCDU-01 in sequence, and then check the power

supply to the internal components of the cabinet Table 4-3 describes the power supply to thecomponents

Table 4-3 Indication of normal power supply to the components

0.125s and OFF for 0.125s) or slowly (ON for1s and OFF for 1s)

off for 1s)

0.125s and OFF for 0.125s) or slowly (ON for1s and OFF for 1s)

blinks green (on for 1s and off for 1s)

Step 5 If the power supply to the components fails after the cabinet is powered on, perform

troubleshooting as described in Table 4-4

Table 4-4 Troubleshooting

Failure of power supply to all the internalcomponents of the cabinet

Check whether the PGND cable and inputpower cable are properly connected

l If the cable connection is incorrect, set allthe power switches to OFF, and thenreconnect the power cables

l If the cable connection is correct, replacethe DCDU

4 Powering On and Power Off the BTS3900A

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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 whetherthe pins of the board slot on the backplaneare distorted, broken, or missing Replacethe subrack if necessary

2 Insert the board into the subrack, and thencheck the LEDs 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 caninfer 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 voltage

of the faulty component

l If the input voltage is within the range from-38.4 V DC to -57 V DC, replace thecomponent

l If the input voltage is not within the rangefrom -38.4 V DC to -57 V DC, check theconnections of power cables for thecomponent If the power cables are notconnected securely, set all the powerswitches on the DCDU to OFF, and thenreconnect the power cables If the powercables are connected securely, you mustreplace the DCDU because the powerswitches on it might be faulty

End

4.2 Powering Off the BTS3900A

The BTS3900A can be powered off in two ways: normal power-off and emergency power-off

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1 Modify the management status to block all the RFUs in the RFC

2 Set the DC output power switch on the DCDU-01 in the RFC to OFF

3 Set the DC output power switches on the EPS and DCDU-03 to OFF

4 Turn off the external power switch of the BTS3900A

1 Turn off the external power switch of the BTS3900A

2 Set all the DC power switches of the BTS3900A to OFF if time permits

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5 Replacing BTS3900A Components

Replacing the BTS3900A components involves replacing the BBU3900 components, RFU,DCDU-01, EPS, PMU or PSU, batteries, TEC cooler, AC surge protector, core of the heatexchanger, and heater

5.1 Replacing Components of the BBU3900

This describes how to replace components of the BBU The components are the BBU case,boards and module of the BBU, and optical modules

5.2 Replacing SLPU Parts

During the SLPU maintenance, the following parts of the SLPU can be replaced as required: theSLPU case, UELP and UFLP

5.3 Replacing the Fan Box in the RFC

If a centrifugal fan or the CMUA in the fan box of the RFC is faulty, you must replace the fanbox

5.4 Replacing the RFU

The RFU is an RF filter unit, which is located in the RFC

5.5 Replacing the DCDU-01 Module

The DCDU-01 is positioned in the upper part of the RFC and provides DC power for all thecomponents in the RFC

5.6 Replacing the Fan Box in the APM30H

If the fan box in the APM30H is faulty, you must replace it

5.7 Replacing the PMU

If the PMU is faulty and cannot be repaired in time, you must replace it

5.8 Replacing the PSU

If the PSU is faulty and cannot be repaired in time, you must replace it

5.9 Replacing the EPS Subrack

If the EPS subrack is faulty and cannot be repaired in time, you must replace it

5.10 Replacing the AC Surge Protector

If the AC surge protector is faulty, you must replace it

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5.11 Replacing the Fuse

When certain power equipment, which has high current requirements, is connected to a DCoutput port on the EPS subrack, the fuse on the port need to be replaced if it cannot meet thehigh-current requirement Replacing the fuse that controls the port for supplying power to theBBU disrupts all the services carried by the base station

5.12 Replacing the Fan on the Front Door of the APM30H

There are two types of heat exchanger installed on the front door of the APM30H: modularizedheat exchanger and non-modularized heat exchanger The procedure for replacing the fan on thefront door of the APM30H varies according to the type of heat exchanger

5.13 Replacing the Fan Box in the TMC11H

If the fan box in the TMC11H is faulty, you must replace it

5.14 Replacing the Heater

If a heater in the APM30H or the TMC11H is faulty and cannot be repaired in time, you mustreplace it

5.15 Replacing the Batteries

If batteries are faulty or old, you must replace them Generally, batteries are replaced in batches

5.16 Replacing the Fan on the Front Door of the IBBS200D

If a centrifugal fan on the front door of the IBBS200D is faulty, you must replace it

5.17 Replacing the TEC Cooler of the IBBS200T

The TEC cooler helps dissipate the heat of storage batteries to ensure the normal operation ofthe IBBS200T in high-temperature areas If the TEC cooler is faulty and cannot be repaired intime, you must replace it

5.18 Replacing the CMUA

If the Central Monitoring Unit type A (CMUA) on the front panel of the IBBS200D or IBBS200Tcabinet is faulty, you must replace it

5.19 Replacing the ELIA

The Electronic Label Identity type A (ELIA) is installed in the ELU box The board reports theinformation about the cabinet type If the ELIA is faulty, you must replace it

5 Replacing BTS3900A Components

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5.1 Replacing Components of the BBU3900

This describes how to replace components of the BBU The components are the BBU case,boards and module of the BBU, and optical modules

5.1.1 Querying Board Information

Before 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 BBU in the 19-Inch Cabinet

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

5.1.5 Replacing the UPEU

This describes the Universal Power and Environment Interface Unit (UPEU) board It is amandatory board of the BBU that converts -48 V or +24 V DC to +12 V DC

5.1.6 Replacing the UEIU

The Universal Environment Interface Unit (UEIU) provides channels for transmitting themonitoring signals from the service board to the BBU

5.1.7 Replacing the FAN Unit

The 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

5.1.8 Replacing the UTRP

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

5.1.9 Replacing the USCU

The 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 the Optical Module

The optical module implements optical-electrical conversion, thus enabling optical transmissionbetween the BBU and other devices

5.1.1 Querying Board Information

Before replacing a board, you need to query the board information at the remote end to confirmthe type of board to be replaced

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

fields in the query result Ensure that the new board is of the same type by checking theBTS3900A WCDMA

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

Figure 5-1 shows a label containing the bar code

Figure 5-1 A label containing the bar code

5.1.2 Replacing the BBU in the 19-Inch Cabinet

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

Prerequisite

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

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

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

1 Back up the service data or transfer the service carried by the BBU to be replaced if required

2 On the LMT, run the ULD CFGFILE command to upload the data configuration file of

the NodeB to the PC installed with the LMT

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

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

WARNING

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Step 5 Disconnect the power cables, transmission cables, CPRI cables, and alarm cables from the panels

of the boards in the BBU

Step 6 Loosen the four M6 screws on the BBU, and then remove the BBU, as shown in Figure 5-2

Figure 5-2 Removing the BBU

Step 7 Remove all the boards in the faulty BBU, install the boards in the corresponding slots of the new

BBU, and then install filler panels in the idle slots

Step 8 Install the new BBU, tighten the screws on the BBU until the tightening torque reaches 2 N·m,

and then reconnect the cables

Step 9 Power on the BBU For details, see Powering On the BBU.

Step 10 Check whether the new BBU is functional according to the status of the LEDs on the BBU For

details about the status of the LEDs, see the related hardware description

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

administrator to perform the following operations:

1 Run the DLD CFGFILE command to download the backed up data configuration file of

the NodeB to the new BBU

2 Check and ensure that no alarm related to the boards or modules in the BBU is generated

3 Manually synchronize the inventory information For details, see the M2000 Operator

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

l Contact the local Huawei office to handle the faulty component

5.1.3 Replacing the WMPT

The WCDMA Main Processing & Transmission unit (WMPT) processes signals and managesresources on other boards

BTS3900A WCDMA

5-5

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

Figure 5-3 Position of the WMPT in the BBU

WMPT WMPT

2 Run the ULD CFGFILE command to upload the data configuration file of the NodeB to

the PC installed with the LMT

WARNING

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

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Figure 5-4 Disconnecting cables

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

5-5

Figure 5-5 Removing the WMPT

2 1

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

board For details, see WMPT

Step 7 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6

N·m, and then reconnect the cables

Step 8 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 WMPT

1 Load and activate the software version of the WMPT For details, see the LMT User

Guide.

2 Run the DLD CFGFILE command on the LMT to download the backed up data

configuration file of the NodeB to the new BBU

3 Check that no alarm related to the board is generated For details, see the LMT User

5-7

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

l Figure 5-6 shows the position of the WBBP in the BBU

Figure 5-6 Position of the WBBP

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Figure 5-7 Disconnecting the cable

Step 5 Loosen the two M3 screws on the panel, and then remove the WBBP, as shown in Figure 5-8

Figure 5-8 Removing the WBBP

2 1

For details about the status of the LEDs, see WBBP

1 Load and activate the software version of the WBBP For details, see the LMT User

Guide.

3 Check that no alarm related to the board is generated For details, see the LMT User

BTS3900A WCDMA

5-9

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5.1.5 Replacing the UPEU

This describes the Universal Power and Environment Interface Unit (UPEU) board It is amandatory board of the BBU that converts -48 V or +24 V DC to +12 V DC

l Figure 5-9 shows the position of the UPEU in the BBU

Figure 5-9 Position of the UPEU

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Take 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 5 Disconnect the power cable, monitoring cable and alarm cable on the UPEU as shown in Figure

5-10

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

5-11

Figure 5-11 Removing the UPEU

1 2

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

For details about the status of the LEDs, see UPEU

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

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

3 Check and ensure that no alarm related to the board is generated For details, see the relatedLMT User Guide

Guide.

BTS3900A WCDMA

5-11

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

End

Postrequisite

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

l Fill in the fault form with the details of the replaced board

l Contact the local Huawei office to handle the faulty board

5.1.6 Replacing the UEIU

The Universal Environment Interface Unit (UEIU) provides channels for transmitting themonitoring signals from the service board to the BBU

l Figure 5-12 shows the position of the UEIU in the BBU

Figure 5-12 Position of the UEIU

UEIU

l The board is hot-swappable

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

Procedure

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Step 3 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-13

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

5-14

Figure 5-14 Removing the UEIU

2 1

1 Check and ensure that no alarm related to the board is generated For details, see the relatedLMT User Guide

5.1.7 Replacing the FAN Unit

The 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.BTS3900A WCDMA

5-13

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l Figure 5-15 shows the position of the FAN unit in the BBU.

Figure 5-15 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

Figure 5-16 Removing the FAN unit

Định dạng
Số trang	99
Dung lượng	3,23 MB

Tiêu đề	Site Maintenance Guide
Trường học	Huawei Technologies Co., Ltd.
Chuyên ngành	WCDMA
Thể loại	Guide
Năm xuất bản	2010
Thành phố	Shenzhen