42828780 BTS3900A WCDMA Site Maintenance Guide V200 05

BTS3900A WCDMAV200

Site Maintenance Guide

Issue 05

Date 2010-06-05

HUAWEI TECHNOLOGIES CO., LTD.

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

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

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http://www.huawei.com

mailto:[email protected]

About This Document

PurposeAfter the BTS is deployed, accepted, and put into use, routine maintenance is performed to ensurethe functionality of the BTS.

This document describes the routine hardware maintenance items of the BTS3900A WCDMA.The maintenance items consist of those for power supply and grounding system maintenanceand those for cabinet maintenance. This document also describes the procedures for replacingthe components.

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

Product Name Product Version

BTS3900A WCDMA (hereinafter referredto as BTS3900A)

V200R010

V200R011

V200R012

Intended Audience

This document is intended for:

l System engineers

l Site maintenance engineers

Organization

1 Changes in the BTS3900A WCDMA Site Maintenance Guide

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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.

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.

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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.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are inCourier New.

Command Conventions

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


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

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

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

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

{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

GUI Conventions

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


Boldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder.

Keyboard Operations

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

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Format Description

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

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn.

Mouse Operations

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

Action Description

Click Select and release the primary mouse button without movingthe pointer.

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

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

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Contents

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 ................................................3-13.1 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.........................................................................4-14.1 Powering On the BTS3900A...........................................................................................................................4-24.2 Powering Off the BTS3900A..........................................................................................................................4-5

5 Replacing BTS3900A Components.........................................................................................5-15.1 Replacing Components of the BBU3900........................................................................................................5-3

5.1.1 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............................................................................................................5-18

5.2 Replacing SLPU Parts...................................................................................................................................5-205.2.1 Replacing the SLPU.............................................................................................................................5-215.2.2 Replacing the UELP.............................................................................................................................5-225.2.3 Replacing the UFLP.............................................................................................................................5-24

5.3 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...............................................................................5-49

5.12.1 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..............5-54

5.13 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

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Figures

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

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Figure 5-32 Taking out the handle.....................................................................................................................5-29Figure 5-33 Removing the RFU.........................................................................................................................5-30Figure 5-34 Installation position of the DCDU-01............................................................................................5-32Figure 5-35 DCDU-01........................................................................................................................................5-32Figure 5-36 Top view of the fan box in the APM30H.......................................................................................5-35Figure 5-37 Removing the fan box from the APM30H.....................................................................................5-35Figure 5-38 Installation position of the PMU....................................................................................................5-36Figure 5-39 Removing the PMU........................................................................................................................5-37Figure 5-40 Setting DIP switches ......................................................................................................................5-38Figure 5-41 Installing the PMU..........................................................................................................................5-39Figure 5-42 Installation position of the PSU......................................................................................................5-40Figure 5-43 Removing the PSU.........................................................................................................................5-41Figure 5-44 Installing the PSU...........................................................................................................................5-41Figure 5-45 Replacing the EPS subrack.............................................................................................................5-43Figure 5-46 Installation position of the AC surge protector..............................................................................5-45Figure 5-47 Removing the surge protector.........................................................................................................5-45Figure 5-48 Installation position of the fuse and spare fuse box........................................................................5-46Figure 5-49 Position of the extraction tool in the cabinet..................................................................................5-47Figure 5-50 Removing the faulty fuse................................................................................................................5-48Figure 5-51 Taking the spare fuse......................................................................................................................5-48Figure 5-52 Position of the fan in the APM30H................................................................................................5-50Figure 5-53 Remove the faulty cable for the fan................................................................................................5-51Figure 5-54 Removing the air duct.....................................................................................................................5-51Figure 5-55 Removing the heat exchanger.........................................................................................................5-52Figure 5-56 Removing the cover plate of the fan cavity....................................................................................5-52Figure 5-57 Removing the faulty fan.................................................................................................................5-53Figure 5-58 Position of the fan in the APM30H................................................................................................5-54Figure 5-59 Removing the fan on the front door of the APM30H.....................................................................5-55Figure 5-60 Top view of the fan box in the TMC11H.......................................................................................5-57Figure 5-61 Removing the fan box from the TMC11H.....................................................................................5-57Figure 5-62 Removing the faulty heater.............................................................................................................5-59Figure 5-63 Installing the new heater.................................................................................................................5-59Figure 5-64 Removing the cover plate on the batteries......................................................................................5-61Figure 5-65 Removing cables of the batteries....................................................................................................5-61Figure 5-66 Installation position of the fan on the front door of the IBBS200D...............................................5-62Figure 5-67 Removing the fan box of the IBBS200D........................................................................................5-63Figure 5-68 Removing the faulty fan.................................................................................................................5-64Figure 5-69 Installation position of the TEC cooler...........................................................................................5-65Figure 5-70 Removing the retention screws on the CMUA...............................................................................5-66Figure 5-71 Removing the faulty TEC cooler....................................................................................................5-66Figure 5-72 DIP settings and bit positions of the CMUA in different cabinets.................................................5-67Figure 5-73 Installation position of the CMUA.................................................................................................5-68

FiguresBTS3900A WCDMA


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

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Tables

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

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1 Changes in the BTS3900A WCDMA SiteMaintenance 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 FrontDoor

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

Contents Change Description

5.4 Replacing the RFU Some descriptions are optimized.

5.1.5 Replacing the UPEU

5.12.3 Replacing the Fan for the Non-Modularized Heat Exchanger Installed onthe Front Door

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 WCDMASite Maintenance Guide

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1-1

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


Topic Change Description

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.


Topic Change Description

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 MaintenanceGuide

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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.

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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)

– Spare parts

NOTE

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

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3 Routine Maintenance Items for theBTS3900A 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 ItemsThis 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 BTS3900AThis section describes the items, checking frequencies, operations, and reference standards forthe maintenance of the BTS3900A cabinet.

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3-1

3.1 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 3-1 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

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.

3.2 Maintenance Items for the BTS3900AThis section describes the items, checking frequencies, operations, and reference standards forthe maintenance of the BTS3900A cabinet.

Table 3-2 describes the maintenance items for the BTS3900A cabinet.

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Table 3-2 Maintenance items for the BTS3900A cabinet

Item CheckingFrequency

Operation ReferenceStandard

Fans Monthly or quarterly Check whether fanswork properly.

The fans workproperly without anyabnormal smell orsound.

Cabinet surface Every six months Check whether thecabinet surface isdamaged andwhether the label onthe cabinet is legible.

-

Door and lock of thecabinet

Monthly Check whether thelock of the cabinetworks properly andwhether the door canbe opened and closedwithout obstructions.

-

Cabinet cleanliness Every six months Check whether thecabinets are clean.

The cabinet surfaceis clean, and theinside of the cabinetis not dusty.

LEDs on each board Monthly or quarterly Check whether theLEDs of the modulesand boards inside thecabinet workproperly.

For details on thestatus of LEDs, seethe BTS3900AHardwareDescription.

Cables Quarterly Check whether thesignal 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.

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Item CheckingFrequency

Operation ReferenceStandard

Smoke sensorNOTE

The smoke sensor isoptional. If it is notconfigured, ignore thechecking.

Every three years Clean the smokesensor, and thenperform tests on thethreshold of theresponse and otherfunctions.Check the operatingenvironment.

The operatingenvironment is asfollows:l Temperature

range:-10oC to+55oC

l Humidity: ≤ 95%RH (40oC ± 2oC)

l Wind speed: lessthan 5 m/s

l No dust or fog inthe air

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

l No corrosive gasin the air

l No smoke stain ingeneral conditions

ESD wrist strap Quarterly Check the ESD wriststrap in either of thefollowing ways:l Use an ESD wrist

strap tester to testthe ESD wriststrap.

l Use a multimeterto 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.

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4 Powering On and Power Off the BTS3900A

About This Chapter

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 BTS3900AThis describes how to power on the BTS3900A and handle the power supply failure of internalcomponents of the cabinet.

4.2 Powering Off the BTS3900AThe BTS3900A can be powered off in two ways: normal power-off and emergency power-off.

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4.1 Powering On the BTS3900AThis describes how to power on the BTS3900A and handle the power supply failure of internalcomponents of the cabinet.

Prerequisitel 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.

ContextFigure 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

No. Description

1 AC input MCB

2 AC output MCB (controlling the AC power supplyto the SOU or heater)

3 Battery MCB

4 RFC input MCB

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No. Description

5 TMC input MCB

6 DC output fuse (F0 to F7)

NOTE

F0 is the DC output fuse of the fan box. F1 and F2 are the DC output fuses of the BBU. F3 is the DC outputfuse of the IBBS. F4 to F7 are the DC output fuses of the transmission equipment or reserved DC outputfuses. The fuses need to be configured and used according to the site installation requirements.

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

No. Description

1 DC output power switch

CAUTIONThe cabinet must be powered on in seven days after being unpacked, and the period of the power-off state of the cabinet cannot exceed 48 hours during maintenance.

Procedure

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.



4-3

DANGERPower-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 powersupply 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

Component Indication of Normal Power Supply

BBU WMPT The RUN LED blinks green rapidly (ON for0.125s and OFF for 0.125s) or slowly (ON for1s and OFF for 1s).

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

UPEU The RUN LED is steady green.

WBBP The RUN LED blinks green rapidly (ON for0.125s and OFF for 0.125s) or slowly (ON for1s and OFF for 1s).

FAN The fans run properly.

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

Step 5 If the power supply to the components fails after the cabinet is powered on, performtroubleshooting as described in Table 4-4.

Table 4-4 Troubleshooting

Fault Type Handling Measures

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 all

the power switches to OFF, and thenreconnect the power cables.

l If the cable connection is correct, replacethe DCDU.




Issue 05 (2010-06-05)

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 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 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 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 BTS3900AThe BTS3900A can be powered off in two ways: normal power-off and emergency power-off.

Context

You must power off the BTS3900A in normal situations such as moving the equipment andanticipating a territorial blackout.

You must power off the BTS3900A in an emergency, such as a fire, smoke, or water immersion.



4-5

Procedurel Normal power-off

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.

l Emergency power-off1. Turn off the external power switch of the BTS3900A.2. Set all the DC power switches of the BTS3900A to OFF if time permits.

CAUTIONPowering off the BTS3900A in an emergency may damage the equipment and boards. Incases other than emergencies, perform normal power-off.

----End




Issue 05 (2010-06-05)

5 Replacing BTS3900A Components

About This Chapter

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 BBU3900This 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 PartsDuring 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 RFCIf a centrifugal fan or the CMUA in the fan box of the RFC is faulty, you must replace the fanbox.

5.4 Replacing the RFUThe RFU is an RF filter unit, which is located in the RFC.

5.5 Replacing the DCDU-01 ModuleThe 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 APM30HIf the fan box in the APM30H is faulty, you must replace it.

5.7 Replacing the PMUIf the PMU is faulty and cannot be repaired in time, you must replace it.

5.8 Replacing the PSUIf the PSU is faulty and cannot be repaired in time, you must replace it.

5.9 Replacing the EPS SubrackIf the EPS subrack is faulty and cannot be repaired in time, you must replace it.

5.10 Replacing the AC Surge ProtectorIf the AC surge protector is faulty, you must replace it.

BTS3900A WCDMASite Maintenance Guide 5 Replacing BTS3900A Components


5-1

5.11 Replacing the FuseWhen 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 APM30HThere 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 TMC11HIf the fan box in the TMC11H is faulty, you must replace it.

5.14 Replacing the HeaterIf a heater in the APM30H or the TMC11H is faulty and cannot be repaired in time, you mustreplace it.

5.15 Replacing the BatteriesIf 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 IBBS200DIf a centrifugal fan on the front door of the IBBS200D is faulty, you must replace it.

5.17 Replacing the TEC Cooler of the IBBS200TThe 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 CMUAIf 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 ELIAThe 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 ComponentsBTS3900A WCDMA



Issue 05 (2010-06-05)

5.1 Replacing Components of the BBU3900This 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 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 BBU in the 19-Inch CabinetThis chapter describes how to replace the BBU in a 19-inch cabinet, such as in an APM30 orTMC.

5.1.3 Replacing the WMPTThe WCDMA Main Processing & Transmission unit (WMPT) processes signals and managesresources on other boards.

5.1.4 Replacing the WBBPThe WCDMA Baseband Process Unit (WBBP) configured in the BBU processes basebandsignals.

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

5.1.7 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.

5.1.8 Replacing the 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.

5.1.9 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 the Optical ModuleThe optical module implements optical-electrical conversion, thus enabling optical transmissionbetween the BBU and other devices.

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 LST BRDINFO command on the LMT.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 the



5-3

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

Prerequisitel 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.

ContextReplacing the BBU in a 19-inch cabinet disrupts all the services carried by the NodeB. Therefore,the BBU should be replaced within 20 minutes.

Procedure

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

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




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Step 5 Disconnect the power cables, transmission cables, CPRI cables, and alarm cables from the panelsof 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 newBBU, 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. Fordetails 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 theadministrator to perform the following operations:

1. Run the DLD CFGFILE command to download the backed up data configuration file ofthe 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 OperatorGuide.

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.

5.1.3 Replacing the WMPTThe WCDMA Main Processing & Transmission unit (WMPT) processes signals and managesresources on other boards.



5-5


are ready.

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


Context

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

Figure 5-3 Position of the WMPT in the BBU

WMPT

WMPT

ETH FE0 FE1 USB TST E1/T1 RST GPS

RUNALMACT

TX RX

l The WMPT is hot-swappable.

l Replacing the WMPT disrupts all the services carried by the NodeB. Therefore, the WMPTshould be replaced within 10 minutes.

Procedure

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

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

2. Run the ULD CFGFILE command to upload the data configuration file of the NodeB tothe PC installed with the LMT.



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

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




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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 Figure5-5.

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 faultyboard. For details, see WMPT.

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

Step 9 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 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

Guide.4. Manually synchronize the inventory information. For details, see the M2000 Operator

Guide.


----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.



5-7

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

5.1.4 Replacing the WBBPThe WCDMA Baseband Process Unit (WBBP) configured in the BBU processes basebandsignals.


are ready.l The type of board to be replaced and its quantity 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 5-6 shows the position of the WBBP in the BBU.

Figure 5-6 Position of the WBBP

WBBP

WBBP TX RX

CPRI0/EIH0 CPRI1/EIH1 CPRI2/EIH2

TX RX TX RXRUNALMACT

l The WBBP is hot-swappable.

Procedure

Step 1 Instruct the M2000 administrator to perform the following operations for the replacement of theWBBP:1. Back up the service data or transfer the service carried by the board to be replaced if

required.2. Run the BLK BRD command to block the WBBP.




Step 4 Disconnect the CPRI cable from the WBBP, as shown in Figure 5-7.




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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


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 WBBP.


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

2. Run the UBL BRD command to unblock the WBBP.

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



----End







5-9

5.1.5 Replacing the UPEUThis 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.


are ready.

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


Contextl Figure 5-9 shows the position of the UPEU in the BBU.

Figure 5-9 Position of the UPEU

UPEU

l Replacing the UPEU disrupts the power supply to the BBU, and the services are alsodisrupted. 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:

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.

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





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Step 5 Disconnect the power cable, monitoring cable and alarm cable on the UPEU. as shown in Figure5-10.


Step 6 Remove the two M3 screws on the panel, and then remove the UPEU, as shown in Figure5-11.

Figure 5-11 Removing the UPEU

12


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

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 UPEU.

Step 10 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 UPEU. For details, see the related LMT User

Guide.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 related

LMT User Guide.4. Manually synchronize the inventory information. For details, see the M2000 Operator

Guide.



5-11


----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.


5.1.6 Replacing the UEIUThe Universal Environment Interface Unit (UEIU) provides channels for transmitting themonitoring signals from the service board to 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 5-12 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 Figure5-14.

Figure 5-14 Removing the UEIU

21


Step 6 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 board is generated. For details, see the related


Guide.


----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 component.


5.1.7 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.



5-13




Contextl 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.

Procedure



Step 2 Remove the two M3 screws on the panel, and then remove the FAN unit, as shown in Figure5-16.

Figure 5-16 Removing the FAN unit

1 2




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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.

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.


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



----End





5.1.8 Replacing the 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.

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.



5-15

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. Remove 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 recordedcable connections.

Step 3 Check the running status of the new UTRP.

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

----End

Postrequisitel Record the bar code of the replaced board.

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

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.



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




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Figure 5-17 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 GPS clock signal cable from the USCU, as shown in Figure 5-18.


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

Figure 5-19 Removing the USCU

2

1



5-17


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 related LMT User

Guide.2. Check and ensure that no alarm related to the board is generated. For details, see the related


Guide.


----End




5.1.10 Replacing the Optical ModuleThe optical module implements optical-electrical conversion, thus enabling optical transmissionbetween the BBU and other devices.

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

l All the types of optical module are ready.


Contextl Figure 5-20 shows the position of the optical module on a board.




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Figure 5-20 Position of the optical module

1

(1) Optical module

l The optical module is hot-swappable.

ProcedureStep 1 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 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 5-21.




5-19

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 Figure5-22.

Figure 5-22 Removing the optical module

Step 6 Install the new optical module onto the BBU.

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


----End




5.2 Replacing SLPU PartsDuring the SLPU maintenance, the following parts of the SLPU can be replaced as required: theSLPU case, UELP and UFLP.




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

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

5.2.3 Replacing the UFLPEach Universal FE Lightning Protection unit (UFLP) provides protection for two FEs/GEs.

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

Prerequisitel The tools and materials, such as an ESD wrist strap, a pair of ESD gloves, and a screwdriver,

are ready.l The new boards are available according to the quantity and types of the boards to be

replaced. For details, see the LMT User Guide.l The associated personnel are permitted to enter the site. The required keys are available.

Contextl Figure 5-23 shows the position of the SLPU in a cabinet.

Figure 5-23 Position of the SLPU

Procedure

Step 1 Notify the administrator of the M2000 to perform the following operations preparatory to thereplacement of the SLPU:

If necessary, back up or transfer the service data carried by the board.




Step 4 Disconnect the transmission cable on the panel of the SLPU.



5-21

Step 5 Remove the four M6 screws on the panel and remove the SLPU, as shown in Figure 5-24.

Figure 5-24 Removing the SLPU

Step 6 Remove all the boards in the faulty SLPU, install the boards in the corresponding slots of thenew SLPU, and then install filler panels in the idle slots.

Step 7 Install the new SLPU, tighten the screws on the SLPU until the tightening torque reaches 2 N·m,and then reconnect the cables.

Step 8 Notify the administrator of the M2000 that the replacement is complete, and tell the administratorto perform the following operations:1. Check and ensure that no alarm related to the board is generated. For details, see the related


Guide.

Step 9 Take off the ESD wrist strap or gloves, and pack up the tools.

----End




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







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Contextl Figure 5-25 shows the position of the UELP in the SLPU.

Figure 5-25 Position of the UELP

SLPUUELP

S0INSIDE OUTSIDE

S1

S2

S3

UELP


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

the UELP:

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




Step 4 Disconnect the transmission cables from the UELP, as shown in Figure 5-26.


Step 5 Remove the four M3 screws on the panel, and then remove the UELP, as shown in Figure5-27.

Figure 5-27 Removing the UELP

1

21



5-23

Step 6 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 UELP.



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



----End





5.2.3 Replacing the UFLPEach Universal FE Lightning Protection unit (UFLP) provides protection for two FEs/GEs.


are ready.



Contextl Figure 5-28 shows the position of the UFLP in the SLPU.

Figure 5-28 Position of the UFLPSLPU

S0

S1

S2

S3

FE0

INSIDE OUTSIDE

FE1 FE0 FE1UFLP

UFLP





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Procedure

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

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




Step 4 Disconnect the transmission cables from the UFLP, as shown in Figure 5-29.


Step 5 Remove the four M3 screws on the panel, and then remove the UFLP, as shown in Figure5-30.

Figure 5-30 Removing the UFLP

1

21


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 UFLP. For details, see the LMT User

Guide.



5-25



----End




5.3 Replacing the Fan Box in the RFCIf a centrifugal fan or the CMUA in the fan box of the RFC is faulty, you must replace the fanbox.

Prerequisitel The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, flat-head

screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty fan boxes are confirmed. For details, and new fan

boxes of the same quantity and model are ready.l The authorized personnel are permitted to enter the site. The required keys are available.

Contextl The fan box in the RFC houses the fan and CMUA. If any of the components is faulty, the

fan box must be replaced.l It takes about 20 minutes to replace the fan box.

Procedure



Step 2 Set the MCB labeled FAN of the fan box on the DCDU-01 to OFF.

Step 3 Record all the cable connections on the panel of the faulty fan box.

Step 4 Disconnect all cables from the panel of the faulty fan box.

Step 5 Remove the faulty fan box.1. Remove the four screws on the mounting ears at both sides of the fan box.




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2. Hold the fan box with one hand, and remove it from the cabinet slightly with the other hand,as shown in Figure 5-31.

Figure 5-31 Removing the fan box in the RFC

WARNINGDo not touch the rotating fans to prevent damage to your hands when removing the fanbox.

3. Place the faulty fan box into the ESD box or bag.

Step 6 Install the new fan box.

1. Place the new fan box in its installation position.

2. Hold the new fan box with one hand, and push it into the cabinet slightly with the otherhand until the mounting ears are in contact with the columns.

3. Tighten the four screws on the mounting ears at both sides of the fan box.

Step 7 Connect the cables to the corresponding ports on the panel of the new fan box.

Step 8 Set the MCB of the fan box on the DCDU-01 to ON.

Step 9 Check the status of the indicators to determine whether the new fan box works properly. Fordetails on the status of the indicators, see CMUA.

Step 10 Take off the ESD wrist strap or gloves, and pack up all the tools.

----End



5-27





5.4 Replacing the RFUThe RFU is an RF filter unit, which is located in the RFC.

Prerequisitel The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, Phillips

screwdriver, ESD box or bag, dustfree cloth, RFU handle, torque wrench, and key to thecabinet door, are ready.

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


Contextl Replacing an RFU disrupts all the services carried by the RFU.

l It takes about 6 to 10 minutes to replace an RFU, which involves disconnecting the cables,removing screws, removing the faulty RFU, inserting a new RFU, tightening the screws,connecting the cables to the new RFU, and loading the software.

WARNINGUse both hands to handle the RFU during the installation because it is heavy.

Procedure

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

1. Back up the service data or transfer the services carried by the RFU.

2. Back up the associated logs.

3. Locate the faulty RFU, and then run the associated MML command on the LMT to blockthe faulty RFU. For details, see the LMT User Guide.

NOTE

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





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Step 3 Power off the RFU by setting the DC output MCB that corresponds to the faulty RFU on thepanel of the DCDU to OFF.

Step 4 Label the power cable on the panel of the faulty RFU, and then disconnect the cable.

Step 5 Label the RF jumper, use a torque wrench to remove the DIN 7/16 male elbow connector of theRF jumper, and then disconnect the RF jumper.

Step 6 Label the CPRI cable on the panel of the RFU, and then disconnect the cable.

Step 7 Use a Phillips screwdriver to remove the four screws on the panel of the RFU.

Step 8 Take out the handle delivered with the RFC from the front door of the RFC, as shown in Figure5-32.

Figure 5-32 Taking out the handle

Step 9 Insert the handle into the hole for the handle in the center of the panel of the RFU, turn the handleclockwise or counterclockwise by 90°, and then pull the RFU outwards by about 10 cm, as shownin Figure 5-33.

WARNINGThe handle is used ONLY for moving the RFU horizontally to remove it from the cabinet, butnot for other purposes.



5-29

Figure 5-33 Removing the RFU

Step 10 Place the handle back to the original position. Support the bottom of the RFU with one hand,and remove the RFU with the other hand until it is completely removed from the subrack.

Step 11 Place the faulty RFU into an ESD box or bag.

Step 12 Take out the new RFU, place the new RFU on the corresponding guide rails, and then slide italong the rails until it is in position.

Step 13 Tighten the captive screws on the panel of the RFU to secure the RFU on the subrack.

Step 14 Connect the CPRI cable to the port on the panel of the new RFU based on the cable connectionrecord.

Step 15 Use a torque wrench to connect the RF jumper to the port on the panel of the new RFU until thetightening torque reaches 25 N·m to 35 N·m based on the cable connection record.

Step 16 Connect the power cable to the port on the panel of the new RFU based on the cable connectionrecord.

Step 17 Set the corresponding DC output MCB on the panel of the DCDU to ON to power on the RFU.

Step 18 Check the status of the LEDs to determine whether the new RFU works properly. For detailsabout the status of the LEDs, see the hardware description of the RFU.

Step 19 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 new RFU. For details, see the LMT User

Guide.l Run the associated MML command to query the software version of the new RFU.




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l If the software version is incorrect, run the associated command to reactivate thesoftware version of the new RFU.

2. Run the associated MML command to unblock the RFU. For details, see the LMT UserGuide.

NOTE

Perform this step locally or remotely in accordance with the way used in step 1 at the beginning of thisprocedure. That is, perform this step locally if step 1 is performed locally.

3. Check and ensure that alarms related to the RFU are not generated.4. Manually synchronize the inventory information. For details, see the M2000 Operator

Guide.


----End

Postrequisitel Place the replaced RFU 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 RFU.l Fill in the fault form with the details about the replaced RFU.

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

5.5 Replacing the DCDU-01 ModuleThe DCDU-01 is positioned in the upper part of the RFC and provides DC power for all thecomponents in the RFC.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty modules are confirmed, and new modules of the same

quantity and model are ready.l The authorized personnel are permitted to enter the site. The required keys are available.

Contextl Figure 5-34 shows the installation position of the DCDU-01 in the RFC.



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Figure 5-34 Installation position of the DCDU-01

l Figure 5-35 shows the DCDU-01.

Figure 5-35 DCDU-01

(1) DC input terminal (2) DC output MCB (3) DC output port

(4) Grounding screw (5) Surge protection alarm terminal -

l Replacing the DCDU-01 disrupts all the services carried by the components that are

powered by the module.l It takes about 20 minutes to replace the DCDU-01.

Procedure





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Step 2 Set the corresponding DC output MCBs on the DCDU-01 to OFF to power off the fan box andRFU.

Step 3 Set the DC output MCB labeled RFC1 or RFC2 on the EPS subrack to OFF to power off theDCDU-01 in the RFC.

Step 4 Record all the cable connections on the panel of the faulty DCDU-01.

Step 5 Disconnect all cables from the panel of the DCDU-01.1. Label all the cables on the panel of the faulty DCDU-01.2. Use a Phillips screwdriver to remove the transparent protecting hood from the DC power

input wiring terminal block on the DCDU-01.3. Use a Phillips screwdriver to disconnect the DC input power cable from the DCDU-01.

Step 6 Use a Phillips screwdriver to remove the faulty DCDU-01.1. Remove the four screws on the mounting ears at both sides of the module.2. Pull the module outwards by one-third of its length. Then, hold the bottom of the module

with one hand and continue to pull the module with the other hand until it is completelyremoved from the subrack.

Step 7 Take out the new DCDU-01. Check and ensure that the new DCDU-01 is intact, and its hardwareversion is consistent with the faulty DCDU-01.

Step 8 Hold the panel of the new module with one hand and support the bottom of the module with theother hand, and push it along the guide rail until the module snaps into position in the subrack.Then, tighten the screws on the mounting ears at both sides of the module.

Step 9 Connect the cables to the ports on the panel of the new DCDU-01 based on the cable connectionrecords.1. Remove the transparent protecting hood from the DC input power cable terminal block on

the new DCDU-01.2. Connect the DC input power cable to the port on the panel of the new DCDU-01 based on

the cable connection record.3. Install the transparent protecting hood onto the DC input power cable terminal block on

the DCDU-01, and then tighten the screws.

Step 10 Set the DC output MCB labeled RFC1 or RFC2 on the EPS subrack to ON to power on theDCDU-01.

Step 11 Set the corresponding DC output MCBs on the DCDU-01 to ON to power on the fan box andRFU.

NOTE

Unless otherwise specified, the ground cable of the DCDU-01 is not connected.

Step 12 Check the status of the indicators on the fan box and RFU to determine whether the newDCDU-01 works properly.



5-33


----End

Postrequisitel Place the replaced module 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 module.

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

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

5.6 Replacing the Fan Box in the APM30HIf the fan box in the APM30H is faulty, you must replace it.


screwdriver, ESD box or bag, and key to the cabinet door are ready.

l The quantity and model of the faulty fan boxes are confirmed, and new fan boxes of thesame quantity and model are ready.


Contextl The fan box in the APM30H houses the HPMI, CMUA, and fan. If any of the components

is faulty, the fan box must be replaced.

l It takes about 20 minutes to replace the fan box.

Procedure



Step 2 Remove the fuse corresponding to the port labeled LOAD0. For details, see 5.11 Replacing theFuse.


Step 4 Disconnect all cables from the panel of the faulty fan box.




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NOTE

Remove the RJ-45 connectors linked to the COM_IN, COM_OUT, and ELU ports on the panel of the CMUAthrough the holes in the baffle plate on the ports, as shown in Figure 5-36.

Figure 5-36 Top view of the fan box in the APM30H

Step 5 Remove the retention screws on the mounting ears of the fan box, and then remove the box fromthe cabinet slowly, as shown in Figure 5-37.

Figure 5-37 Removing the fan box from the APM30H

DANGERWhen removing the fan box, do not touch the air inlet at the bottom of the fan box.

Step 6 Place the faulty fan box into an ESD box or bag.

Step 7 Slide the new fan box into the installation position, and then tighten the retention screws on themounting ears of the fan box.



5-35

Step 8 Connect the cables to the ports on the front panel of the fan box based on the cable connectionrecords, and then check and ensure that the cables are properly and correctly connected.

NOTE

You must plug or unplug the DB50 connector of the environment monitoring signal cable perpendicularlyto or from the panel on the HPMI with your hands to prevent false monitoring alarms caused by bent pins.

Step 9 Link the connector at one end of the power cable of the fan box in the APM30H to the portlabeled LOAD0 on the panel of the fan box of the EPS subrack.

Step 10 Connect the fuse to the original port, and then power on the fan box.



----End




5.7 Replacing the PMUIf the PMU is faulty and cannot be repaired in time, you must replace it.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty modules are confirmed, and new modules of the same


Contextl Figure 5-38 shows the installation position of the PMU in the EPS subrack.

Figure 5-38 Installation position of the PMU




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l The module is hot-swappable.

Procedure



Step 2 Record all the cable connections on the panel of the faulty PMU.

Step 3 Disconnect all cables from the panel of the PMU.

CAUTIONWhen connecting the DB50 connector of the environment monitoring signal cable, you shouldpress the latches on both sides of the connector with your hands and plug or unplug the connectorperpendicularly to or from the panel on the HPMI to prevent false monitoring alarms caused bybent pins.

Step 4 Use a Phillips screwdriver to remove the two screws on the ejector lever of the panel of the PMU.

Step 5 Pull the ejector lever gently to disconnect the buckle of the PMU from the subrack, and thenremove the PMU from the slot, as shown in Figure 5-39.

Figure 5-39 Removing the PMU

Step 6 Place the faulty PMU into an ESD box or bag.

Step 7 Set the DIP switches of the new PMU to 11000000, as shown in Figure 5-40.



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Figure 5-40 Setting DIP switches

Step 8 Place the new PMU in the corresponding slot, loosen the screws on the ejector lever of the PMU,and then pull out the ejector lever.

Step 9 Slide the module along the guide rails into the slot until it is in position, and then push the ejectorlever back.

Step 10 Tighten the two screws on the ejector lever. Figure 5-41 shows the installation procedure.




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Figure 5-41 Installing the PMU

Step 11 Connect the cables to the ports on the panel of the new PMU based on the cable connectionrecords.

Step 12 Check the status of the indicators to determine whether the new module works properly. Fordetails on the status of the indicators, see PMU.


----End


a carton padded with foam or into the packing box of the new module.l Fill in the fault form with the details of the replaced module.



5-39


5.8 Replacing the PSUIf the PSU is faulty and cannot be repaired in time, you must replace it.



l The quantity and model of the faulty modules are confirmed, and new modules of the samequantity and model are ready.


Contextl Figure 5-42 shows the installation position of the PSU in the EPS subrack.

Figure 5-42 Installation position of the PSU

l The module is hot-swappable.

Procedure



Step 2 Use a Phillips screwdriver to remove the two screws on the ejector lever of the panel of the PSU.

Step 3 Pull the ejector lever gently to disconnect the buckle of the PSU from the subrack, and thenremove the PSU from the slot, as shown in Figure 5-43.




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Figure 5-43 Removing the PSU

Step 4 Place a new PSU in the corresponding slot, loosen the screws on the ejector lever of the PSU,and then pull out the ejector lever.

Step 5 Slide the module along the guide rails into the slot until it is in position, and then push the ejectorlever back.

Step 6 Tighten the screws on the ejector lever. Figure 5-44 shows the installation procedure.

Figure 5-44 Installing the PSU

Step 7 Check the status of the indicators to determine whether the new module works properly. Fordetails on the status of the indicators, see PSU (AC/DC).


----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 module.



5-41


5.9 Replacing the EPS SubrackIf the EPS subrack is faulty and cannot be repaired in time, you must replace it.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty subracks are confirmed, and new subracks of the same


Contextl Replacing the EPS subrack disrupts all the services carried by the base station.

l It takes about 30 minutes to replace the EPS subrack.

Procedure



Step 2 Set the MCB labeled BAT on the panel of the EPS subrack to OFF.

Step 3 Set the three PSU MCBs on the panel of the EPS subrack to OFF.

Step 4 Turn off the AC input of the APM30H.

Step 5 Disconnect the ground cable of the EPS subrack from the ground bar on the left side of thecabinet.

Step 6 Remove the PMU and the PSU in the EPS subrack. For details, see 5.7 Replacing the PMUand 5.8 Replacing the PSU respectively.

Step 7 Use a Phillips screwdriver to remove the cable support on the right side of the EPS subrack.

Step 8 Label the cables that are delivered with the EPS subrack and connected to the right side of theEPS subrack, and then disconnect the cables.

Step 9 Loosen the screws on the AC protecting hood on the left side of the EPS subrack, and thenremove the protecting hood.

Step 10 Label the AC input power cable and AC output power cable on the left side of the EPS subrack,and then disconnect the cables.




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CAUTIONThe PE wire of the AC input power cable is connected to a hexagonal screw on a mounting earof the EPS subrack. The hexagonal screw must be stored properly after the PE wire isdisconnected.

Step 11 Label the DC output cable on the right side of the EPS subrack, and then disconnect the cable.

Step 12 Remove the remaining seven retention screws on both sides of the EPS subrack, and slowly pullthe subrack out of the cabinet, as shown in Figure 5-45.

Figure 5-45 Replacing the EPS subrack

CAUTIONThe EPS subrack is heavy. Therefore, you need to hold the subrack with one hand, support thebottom with the other hand, and slowly pull the subrack out. This prevents the subrack fromfalling and ensures personal safety.

Step 13 Place the faulty EPS subrack into an ESD box or bag.

Step 14 Slide the new EPS subrack into the original installation position, and then tighten the retentionscrews on both sides of the subrack.

Step 15 Reinstall the PMU and the PSU in the corresponding slots in the new EPS subrack.

Step 16 Secure the Power series 120 connectors to the original support, and then install the support onthe right side of the cabinet.

Step 17 Connect the cables to the ports on the panel of the new EPS subrack based on the cable connectionrecords.



5-43

CAUTIONThe PE wire of the AC input power cable must be connected to the hexagonal screw that isremoved in Step 10. Otherwise, the level of reliability is low.

Step 18 Secure the AC protecting hood to the left side of the EPS subrack, and then tighten the screws.

Step 19 Turn on the AC input of the APM30H.

Step 20 Set the three PSU MCBs on the panel of the EPS subrack to ON.

Step 21 Set the MCB labeled BAT on the EPS subrack to ON.

Step 22 Check the status of the indicators on the PMU and PSU to determine whether the new EPSsubrack works properly. For details on the status of the indicators, see PMU and PSU (AC/DC).


----End




5.10 Replacing the AC Surge ProtectorIf the AC surge protector is faulty, you must replace it.

Prerequisitel The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, ESD box or

bag, and key to the cabinet door are ready.l The quantity and model of the faulty modules are confirmed, and new modules of the same


Contextl Figure 5-46 shows the installation position of the AC surge protector in the EPS subrack.




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Figure 5-46 Installation position of the AC surge protector

(1) AC surge protector

l When the color of the protecting hood on the front panel of the surge protector changes

from green to red, the protector is faulty and you must replace it.

Procedure



Step 2 Press the upper and lower ends of the surge protector, and then remove the protector, as shownin Figure 5-47.

Figure 5-47 Removing the surge protector

Step 3 Place the faulty AC surge protector into an ESD box or bag.



5-45

Step 4 Place the new surge protector in the corresponding slot, and then push it until it is securelyinstalled.

Step 5 Check the color of the protecting hood on the front panel of the surge protector to determinewhether the new surge protector works properly. When the surge protector works properly, thecolor is green.


----End


a carton padded with foam or into the packing box of the new module.l Fill in the fault form with the details of the replaced module.


5.11 Replacing the FuseWhen 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.

Prerequisitel The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, new fuse, ESD

box or bag, and key to the cabinet door, are ready.l The quantity and model of the faulty fuses are confirmed, and new fuses of the same quantity

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

Contextl Figure 5-48 shows the installation position of the fuse and spare fuse box in the EPS

subrack.

Figure 5-48 Installation position of the fuse and spare fuse box

(1) Extraction tool (2) Spare fuse box (3) Fuse




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l The fuse is hot-swappable.

CAUTIONThe specifications of the fuse vary according to the ambient temperature. For details on thederating of the fuse, see the general specifications of the fuse. If the fuse works at a normaltemperature of 25°C, the operating current cannot be greater than 75% of its rated current.

Procedure



Step 2 Take the extraction tool out of the mounting ear on the right side of the EPS subrack.

Figure 5-49 shows the exterior and position of the extraction tool.

Figure 5-49 Position of the extraction tool in the cabinet

Step 3 Use the extraction tool to remove the faulty fuse, as shown in Figure 5-50.



5-47

Figure 5-50 Removing the faulty fuse

Step 4 Place the faulty fuse into an ESD box or bag.

Step 5 Take the fuse from the spare fuse box, as shown in Figure 5-51.

Figure 5-51 Taking the spare fuse

Step 6 Insert the new fuse into the corresponding port.

Step 7 Set the MCB for the new fuse to ON and check the running status of the related modules todetermine whether the fuse works properly.


----End






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5.12 Replacing the Fan on the Front Door of the APM30HThere 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.

5.12.1 Querying the Type of FanYou must determine the type of fan to be replaced on the basis of the ELU information that youhave queried remotely before replacing the fan.

5.12.2 Replacing the Fan for the Modularized Heat Exchanger Installed on the Front DoorIf the fan for the modularized heat exchanger installed in the APM30H is faulty and cannot berepaired in time, you must replace it.

5.12.3 Replacing the Fan for the Non-Modularized Heat Exchanger Installed on the Front DoorIf the fan for the non-modularized heat exchanger installed in the APM30H is faulty and cannotbe repaired in time, you must replace it.

5.12.1 Querying the Type of FanYou must determine the type of fan to be replaced on the basis of the ELU information that youhave queried remotely before replacing the fan.

1. Run the LST BRDINFO command on the LMT.

2. Obtain the information in the ExInfo area in the execution result to determine the type ofthe fan to be replaced.

l If Heat Dissipation Parts.Panasonic is displayed in the ExInfo zone, you can inferthat the type of fan to be replaced serves the modularized heat exchanger.

l If Heat Dissipation Parts.Panasonic is not displayed in the ExInfo zone, you can inferthat the type of fan to be replaced serves the non-modularized heat exchanger.

3. Prepare the type of fan based on the type of heat exchanger in the cabinet.

5.12.2 Replacing the Fan for the Modularized Heat ExchangerInstalled on the Front Door

If the fan for the modularized heat exchanger installed in the APM30H is faulty and cannot berepaired in time, you must replace it.


screwdriver, cable cutter, socket screwdriver, ESD box or bag, and key to the cabinet doorare ready.

l The quantity and model of the faulty fans are confirmed. For details, see 5.12.1 Queryingthe Type of Fan.




5-49

Contextl Figure 5-52 shows the position of the fan in the APM30H.

Figure 5-52 Position of the fan in the APM30H

l It takes about 20 minutes to replace the fan.

Procedure



Step 2 Remove the fuse from the slot corresponding to the port labeled LOAD0 on the EPS to poweroff the CMUA. For details, see 5.11 Replacing the Fuse.

Step 3 Record the connection of the faulty cable for the fan on the fan transfer board, and then removethe cable and rubber cap on the cable outlet, as shown in Figure 5-53.




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Figure 5-53 Remove the faulty cable for the fan

Step 4 Use a Phillips screwdriver to remove the five screws from the air duct, use a socket screwdriverto remove the nut from under the air duct, and then remove the air duct, as shown in Figure5-54.

Figure 5-54 Removing the air duct



5-51

Step 5 Use a Phillips screwdriver to remove the other nine screws from the heat exchanger, and thenremove the heat exchanger from the front door of the APM30H, as shown in Figure 5-55.

Figure 5-55 Removing the heat exchanger

Step 6 Use a Phillips screwdriver to remove the five screws from the cover plate of the fan cavity, andthen remove the cover plate, as shown in Figure 5-56.

Figure 5-56 Removing the cover plate of the fan cavity




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Step 7 Use a Phillips screwdriver to remove the four screws fixing the fan, and then remove the faultyfan, as shown in Figure 5-57.

Figure 5-57 Removing the faulty fan

Step 8 Reinstall the new fan in the fan cavity, and then tighten the four screws on the fan.

Step 9 Install the cover plate of the fan cavity on the heat exchanger, and then tighten the five screwson the cover plate of the fan cavity.

Step 10 Lead the cable for the new fan through the cable outlet on the right of the door of the APM30H,and then install a rubber cap on the cable outlet.

Step 11 Reinstall the heat exchanger on the front door of the APM30H, and then tighten the nine screwson the panel of the heat exchanger.

Step 12 Reinstall the air duct on the heat exchanger, and then tighten the five screws and one nut.

Step 13 Install the cable for the new fan on the fan transfer board based on the cable connections recordedin Step 3.

Step 14 Reinstall the fuse in the slot corresponding to the port labeled LOAD0.

Step 15 Check the running of the fans and status of the LEDs on the CMUA to determine whether thenew fan works properly. For details about the status of the LEDs, see CMUA.


----End



5-53





5.12.3 Replacing the Fan for the Non-Modularized Heat ExchangerInstalled on the Front Door

If the fan for the non-modularized heat exchanger installed in the APM30H is faulty and cannotbe repaired in time, you must replace it.


screwdriver, ESD box or bag, and key to the cabinet door, are ready.

l The quantity and model of the faulty fans are confirmed. For details, see 5.12.1 Queryingthe Type of Fan.


Contextl Figure 5-58 shows the position of the fan in the APM30H.

Figure 5-58 Position of the fan in the APM30H


Procedure





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Step 2 Remove the fuse from the slot corresponding to the port labeled LOAD0. For details, see 5.11Replacing the Fuse.

Step 3 Remove the connector linked to the port labeled FAN_EXT on the panel of the CMUA to poweroff the fan on the front door of the APM30H.

Step 4 Loosen the screws on the cover plate of the fan transfer board, and then remove the cover plate.

Step 5 Label the cables connected to the faulty fan, and then disconnect the cables, as shown in 1 ofFigure 5-59.

Step 6 Remove the eight screws on the cover plate of the fan and remove the cover plate, as shown in2 of Figure 5-59.

Step 7 Remove the baffle and rubber cap on the cable outlet on the side of the fan cavity. Then, removethe cable for the fan, as shown in 3 of Figure 5-59.

Figure 5-59 Removing the fan on the front door of the APM30H



5-55

Step 8 Remove the four screws on the support plate of the fan, and then remove the support plate andfan from the APM30H, as shown in 4 of Figure 5-59.

Step 9 Remove the four screws fixing the fan from the support plate, and then remove the fan.

Step 10 Lead the cable for the new fan through the cable outlet in the support plate. Then, tighten thefour screws fixing the fan.

Step 11 Install the cover plate of the fan back to the fan cavity after the fan is installed, and then tightenthe four screws.

Step 12 Lead the fan cable through the cable outlets of the fan cavity. Then, add the rubber cap and baffleto the cable.

Step 13 Tighten the two screws on the baffle.

Step 14 Reconnect the cable for the fan to the fan transfer board based on the cable connection records.Then, install the cover plate of the fan transfer board.

Step 15 Relink the connector to the port labeled FAN_EXT on the panel of the CMUA.

Step 16 Reinstall the fuse in the slot corresponding to the port labeled LOAD0.

Step 17 Check the running of the fan and status of the LEDs on the CMUA to determine whether thenew fan works properly. For details about the status of the LEDs, see CMUA.


----End




5.13 Replacing the Fan Box in the TMC11HIf the fan box in the TMC11H is faulty, you must replace it.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty fan boxes are confirmed, and new fan boxes of the

same quantity and model are ready.l The authorized personnel are permitted to enter the site. The required keys are available.

Contextl The fan box in the TMC11H houses the HPMI, CMUA, and fan. If any of the components

is faulty, the fan box must be replaced.l It takes about 20 minutes to replace the fan box.




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Step 2 Set the MCB labeled FAN on the DCDU-03 to OFF to power off the fan box.


Step 4 Disconnect all cables from the panel of the faulty fan box.NOTE

Remove the RJ-45 connectors linked to the COM_IN, COM_OUT, and ELU ports on the panel of theCMUA through the holes in the baffle plate on the ports, as shown in Figure 5-60.

Figure 5-60 Top view of the fan box in the TMC11H

Step 5 Remove the retention screws on the mounting ears of the fan box, and then remove the box fromthe cabinet slowly, as shown in Figure 5-61.

Figure 5-61 Removing the fan box from the TMC11H



5-57

DANGERWhen removing the fan box, do not touch the air inlet at the bottom of the fan box.

Step 6 Slide the new fan box into the installation position, and then tighten the retention screws on themounting ears of the fan box.

Step 7 Connect the cables to the ports on the front panel of the fan box based on the cable connectionrecords, and then check and ensure that the cables are properly and correctly connected.

Step 8 Set the MCB labeled FAN on the DCDU-03 to ON to power on the fan box.



----End




5.14 Replacing the HeaterIf a heater in the APM30H or the TMC11H is faulty and cannot be repaired in time, you mustreplace it.

Prerequisitel The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, diagonal pliers,

flat-head screwdriver, Phillips screwdriver, insulation screwdriver, ESD box or bag, andkey to the cabinet door are ready.

l The quantity and model of the faulty heaters are confirmed, and new heaters of the samequantity and model and several cable ties are ready.


ContextThe heater can be installed in the 1 U transmission space based on the actual condition.

WARNINGAfter the installation, do not change the position of the heater during the routine operation.




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Step 2 Set the AC output MCB labeled AC OUTPUT on the panel of the EPS subrack to OFF.

Step 3 Remove the connector at one end of the power cable from the heater.

Step 4 Remove the four screws on the panel of the heater. Hold the heater with one hand, and pull theheater out of the cabinet with the other hand slightly, as shown in Figure 5-62.

Figure 5-62 Removing the faulty heater

Step 5 Place the new heater in its installation position. Hold the new heater with one hand, and push itinto the cabinet with the other hand until the mounting ears are in contact with the columns.

Step 6 Tighten the two screws on both sides of the heater.

Step 7 Re-link the connector at one end of the power cable to the input port of the heater, as shown inFigure 5-63.

Figure 5-63 Installing the new heater



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Step 8 Set the AC output MCB labeled AC OUTPUT on the panel of the EPS subrack to ON.


----End

Postrequisitel Place the replaced heater 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 heater.l Fill in the fault form with the details of the replaced heater.

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

5.15 Replacing the BatteriesIf batteries are faulty or old, you must replace them. Generally, batteries are replaced in batches.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty batteries are confirmed, and new batteries of the same


Context

DANGERDuring the replacement, short circuits or reverse connections cannot exist between the positiveand negative poles of the batteries. All the tools such as wrenches and screwdrivers must becoated with insulating tubes. This prevents the batteries from being burned and ensures personalsafety.

Procedure



Step 2 Set the MCB labeled BAT on the panel of the EPS subrack in the APM30 cabinet to OFF.




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Step 3 Remove the cover plate on the batteries, as shown in Figure 5-64.

Figure 5-64 Removing the cover plate on the batteries

Step 4 Label the input power cables on the positive and negative poles of the batteries and the cablesfor series connection of batteries, and then disconnect the cables, as shown in Figure 5-65.

Figure 5-65 Removing cables of the batteries

Step 5 Hold the steering rope to pull the batteries out. Remove the batteries on this layer with yourhands and place them in a safe location.

NOTE

l Remove the baffle plates and batteries from top to bottom. Remove the batteries before removing thebaffle plate of the lower layer.

l Remove and place the batteries with your hands to prevent the batteries from falling.

Step 6 Install the new batteries layer by layer and connect the input power cables and the cables forseries connection of batteries based on the cable connection records.



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NOTE

l Install all the batteries and baffle plates from bottom to up. Install the batteries before installing thebaffle plate of the upper layer.

l Ensure that the cables are securely and correctly connected.

Step 7 Use a multimeter to measure the voltage at both ends of the battery pack to prevent inverseconnection.

Step 8 Set the MCB labeled BAT on the panel of the EPS subrack to ON.


----End

Postrequisitel Place the replaced batteries 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 batteries.l Fill in the fault form with the details of the replaced batteries.l Contact the local Huawei office to handle the faulty batteries.

5.16 Replacing the Fan on the Front Door of the IBBS200DIf a centrifugal fan on the front door of the IBBS200D is faulty, you must replace it.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty fans are confirmed, and new fans of the same quantity

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

Contextl Figure 5-66 shows the installation position of the fan on the front door of the IBBS200D.

Figure 5-66 Installation position of the fan on the front door of the IBBS200D




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l The fan box on the front door of the IBBS200D houses two centrifugal fans. When

maintaining the fan box, you need to replace only the faulty fan. This example describeshow to replace the fan on the left side.




Step 2 Set the MCB labeled TEC/FAN_SW2 of the fan box to OFF on the power distribution box inthe IBBS200D to power off the fan box.

Step 3 Label the cables below the fan box, and then disconnect the cables.

Step 4 Remove the five retention screws on the fan box, and then remove the fan box, as shown inFigure 5-67.

Figure 5-67 Removing the fan box of the IBBS200D



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Step 5 Disconnect the cables that connect the faulty fan to one side of the CMUA.

Step 6 Remove the four retention screws of the faulty fan, and then remove the faulty fan from the fanbox, as shown in Figure 5-68.

Figure 5-68 Removing the faulty fan

Step 7 Place the new fan in the original position of the faulty fan, and hold the fan with one hand. Then,tighten the four retention screws with the other hand by using a screwdriver.

Step 8 Connect the cables of the new fan to the corresponding ports on the panel of the CMUA, andthen bind the cables to the binding slot on the fan box by using cable ties.

Step 9 Install the fan box onto the front door, and tighten the five retention screws on the cover plate.

Step 10 Connect the cables to the corresponding ports on the panel below the fan box based on the cableconnection records.

Step 11 Set the MCB for the fan in the fan box to ON.

Step 12 Check the running of the fans and the status of the indicators on the CMUA to determine whetherthe new fan works properly. For details on the status of the indicators, see CMUA.


----End





5.17 Replacing the TEC Cooler of the IBBS200TThe 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.




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l The quantity and model of the faulty modules are confirmed, and new modules of the samequantity and model are ready.


Contextl Figure 5-69 shows the installation position of the TEC cooler in the IBBS200T.

Figure 5-69 Installation position of the TEC cooler

Procedure



Step 2 Set the MCB labeled FAN/TEC_SW2 for the TEC cooler of the power distribution box on theinner right side in the IBBS200T to OFF to power off the TEC cooler.



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Step 3 Remove the two retention screws fixing the CMUA on the front door, remove the cover plate,as shown in 1 of Figure 5-70.

Figure 5-70 Removing the retention screws on the CMUA

Step 4 Label the cables that connect the TEC cooler to the CMUA, and then disconnect the cables.

Step 5 Remove the two retention screws of the TEC protecting hood on the inner side of the front door,as shown in 2 of Figure 5-70.

Step 6 Rotate the movable side of the TEC protecting hood clockwise by 90 degrees. Remove the sixretention screws, as shown in Figure 5-71, and then remove the TEC cooler from the subrackof the front door.

Figure 5-71 Removing the faulty TEC cooler




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Step 7 Lead the power cables and the alarm signaling cables through the empty subrack on the frontdoor, and then install six M4 screws to fix the TEC cooler in the reverse direction in Figure5-71.

Step 8 Close the TEC protecting hood, and fix the hood by using two screws.

Step 9 Connect the power cables and the alarm signaling cables that are delivered with the new coolerto the corresponding ports on the CMUA.

Step 10 Fix the CMUA by using two screws.

Step 11 Set the MCB for the TEC cooler of the power distribution box to ON.

Step 12 Check the running of the fans and the status of the indicators on the CMUA to determine whetherthe new TEC cooler works properly. For details on the status of the indicators, see CMUA.


----End


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

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


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty CMUAs are confirmed, and new CMUAs of the same

quantity and model are ready.l DIP settings of the CMUA varies according to cabinet. Figure 5-72 shows the DIP settings

and bit positions of the CMUA in different cabinets.

Figure 5-72 DIP settings and bit positions of the CMUA in different cabinets



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NOTE

The red rectangle in Figure 5-73 shows the position for connecting to the jumper cap.


Contextl Figure 5-73 shows the installation position of the CMUA on the front door of the

IBBS200D or IBBS200T.

Figure 5-73 Installation position of the CMUA

Procedure



Step 2 Set the MCB labeled FAN/TEC_SW2 on the power distribution box to OFF to power off theCMUA.




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Step 3 Record all the cable connections on the CMUA, and then disconnect all cables from the CMUA.

Step 4 Use a screwdriver to remove the screws on the fan box of the IBBS200D or the CMUA box ofthe IBBS200T, and then remove the fan box or CMUA box, as shown in Figure 5-74 or Figure5-75 respectively.

Figure 5-74 Removing the fan box of the IBBS200D



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Figure 5-75 Removing the CMUA box of the IBBS200T

Step 5 Label all the cables connected to the ports on the panel of the backplane of the CMUA, and thendisconnect the cable for the fans or the cable for the TEC cooler.

Step 6 Use a screwdriver to loosen the four retention screws at the four corners of the faulty CMUA.Remove the CMUA and place it into an ESD bag.

Step 7 Install the new CMUA in the fan box of the IBBS200D or in the CMUA box of the IBBS200T,and then use four retention screws to secure the board.

Step 8 Reconnect the cable for the fans or the cable for the TEC cooler to the ports on the panel of thebackplane based on the cable connection records.

Step 9 Reinstall the fan box or CMUA box on the front door of the IBBS200D or IBBS200Trespectively.

Step 10 Check the status of the indicators to determine whether the new CMUA works properly. Fordetails on the status of the indicators, see CMUA.


Step 12 Paste the bar code delivered with the board onto the cover plate. Figure 5-76 shows the positionsfor pasting the bar codes of the CMUA.




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Figure 5-76 Positions for pasting the bar codes of the CMUA

----End

Postrequisitel Place the ESD box or bag that contains the replaced board into a carton padded with foam

or into the packing box of the new board.l Fill in the fault form with the details of the replaced board.


5.19 Replacing the ELIAThe 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.


screwdriver, ESD box or bag, and key to the cabinet door are ready.l The quantity and model of the faulty boards are confirmed, and new boards of the same


ContextThe installation position of the ELU varies according to cabinet. It is installed on the inner leftside of the IBBS200D or IBBS200T or on the inner right side of the APM30H, TMC11H, orRFC.



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Procedure



Step 2 Remove the RJ-45 connector from the port on the housing of the ELU.

Step 3 Open the housing of the ELU upwards according to the direction displayed on the surface of thehousing, as shown in Figure 5-77.

Figure 5-77 Opening the housing of the ELU

Step 4 Use a Phillips screwdriver to loosen the screws on the ELIA. Remove the ELIA and place it intoan ESD bag, as shown in Figure 5-78.

Figure 5-78 Removing the faulty ELIA

Step 5 Install a new ELIA, and then tighten the screws on the panel of the board.

Step 6 Reinstall the housing of the ELU.

Step 7 Re-link the RJ-45 connector to the port on the top of the housing of the ELU.




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----End

Postrequisitel Place the ESD box or bag that contains the replaced board into a carton padded with foam

or into the packing box of the new board.l Fill in the fault form with the details of the replaced board.




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Documents

42828780 BTS3900A WCDMA Site Maintenance Guide V200 05