WCDMA Maintenance Guide

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BTS3900 WCDMA

Site Maintenance Guide

Issue 04

Date 2009-03-30

Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.


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

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

Notice

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

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Contents

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

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

2 Preparations for NodeB Site Maintenance............................................................................2-1

3 Hardware Items of BTS3900 Routine Maintenance............................................................3-1

3.1 Maintaining Items of the Equipment Room Environment of the NodeB.......................................................3-2

3.2 Power Supply and Grounding System Maintenance Items of the NodeB......................................................3-3

3.3 Maintenance of the Main Components in the BTS3900 ................................................................................3-4

4 Powering On/Off the BTS3900................................................................................................4-1

4.1 Powering On the BTS3900.............................................................................................................................4-2

4.2 Powering Off the BTS3900.............................................................................................................................4-4

5 Replacing Components of the BTS3900.................................................................................5-1

5.1 Replacing a BBU3900 Case............................................................................................................................5-3

5.2 Replacing a Board or Module of the BBU3900..............................................................................................5-4

5.3 Replacing a DCDU-01 Module.......................................................................................................................5-5

5.4 Replacing the FAN Unit..................................................................................................................................5-7

5.5 Replacing the PMU.......................................................................................................................................5-10

5.6 Replacing a PSU............................................................................................................................................5-11

5.7 Replacing an SLPU.......................................................................................................................................5-13

5.8 Replacing a WRFU Module..........................................................................................................................5-13

5.9 Replacing the Power Supply Subrack of the BTS3900.................................................................................5-16

6 Maintaining the PS4890............................................................................................................6-16.1 Replacing the PMU.........................................................................................................................................6-2

6.2 Replacing a PSU..............................................................................................................................................6-3

6.3 Replacing the DCDU-04.................................................................................................................................6-5

6.4 Replacing the DCDU-03.................................................................................................................................6-6

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Figures

Figure 4-1 DCDU-01 panel..................................................................................................................................4-2

Figure 4-2 DCDU-01 panel..................................................................................................................................4-4

Figure 5-1 Removing the protection cover...........................................................................................................5-6

Figure 5-2 Removing the screws on the two mounting ears of the module.........................................................5-6

Figure 5-3 Position of the FAN unit switch.........................................................................................................5-8

Figure 5-4 Raising the adjustable cable trough ...................................................................................................5-8

Figure 5-5 Removing the FAN unit.....................................................................................................................5-9

Figure 5-6 Removing the PMU..........................................................................................................................5-10

Figure 5-7 Installing the PMU............................................................................................................................5-11

Figure 5-8 Removing the PSU...........................................................................................................................5-12

Figure 5-9 Installing the PSU.............................................................................................................................5-12

Figure 5-10 Position of the RFU........................................................................................................................5-14

Figure 5-11 Removing the RFU.........................................................................................................................5-15

Figure 5-12 Removing the PMU/PSU................................................................................................................5-17Figure 5-13 Removing the screws from the mounting ears...............................................................................5-18

Figure 6-1 Removing the PMU............................................................................................................................6-2

Figure 6-2 Installing the PMU..............................................................................................................................6-3

Figure 6-3 Removing the PSU.............................................................................................................................6-4

Figure 6-4 Installing the PSU...............................................................................................................................6-4

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Tables

Table 3-1 Maintenance items of the equipment room environment of the ..........................................................3-2

Table 3-2 Maintenance items of the power supply and grounding system of the ...............................................3-3

Table 3-3 Maintenance items of the main components in the BTS3900..............................................................3-4

Table 4-1 Power switches on the DCDU-01 panel...............................................................................................4-2

Table 4-2 Checklist for power supply to the components in the cabinet..............................................................4-3

Table 4-3 Power switches on the DCDU-01 panel...............................................................................................4-4

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About This Document

This document describes the routine hardware maintenance items of the BTS3900, such as

maintenance items concerning the cabinet, power supply and grounding system, and equipment

room. The document also provides guidelines for replacing the components and boards of the

BTS3900.

Product Version

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

Product Name Product Version

BTS3900 WCDMA (hereinafter referred to

as BTS3900)

V200R010

V200R011

Intended AudienceThis document is intended for:

l System engineers

l Site maintainers

Change History

For changes in the document, refer to 1 Changes in the BTS3900 WCDMA Site Maintenance

Guide.

Organization

1 Changes in the BTS3900 WCDMA Site Maintenance Guide

This describes the changes in theBTS3900 WCDMA Site Maintenance Guide.

2 Preparations for NodeB Site Maintenance

This describes the preparations for site maintenance. The preparations for site maintenance

involve obtaining site information, selecting maintenance items, and arranging maintenance

tools and spare parts.

3 Hardware Items of BTS3900 Routine Maintenance

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This describes the routine maintenance for the hardware items in the BTS3900. The hardware

items that are routinely maintained refer to the equipment room environment of the , power

supply and grounding system of the , and main components in the BTS3900.

4 Powering On/Off the BTS3900

When maintaining the BTS3900, you need to power on or power off the BTS3900. You must

power on the BTS3900 according to the specific procedure and requirements, and you can power

off the BTS3900 in a normal situation or in an emergency.

5 Replacing Components of the BTS3900

This describes how to replace the faulty BTS3900 components. The faulty components must be

replaced in time. The replaceable components in the BTS3900 are the BBU3900 case,

BBU3900 board or module, DCDU-01, FAN module, PMU/PSU, SLPU, WRFU, and

BTS3900 power subrack.

6 Maintaining the PS4890

The hardware maintenance of the PS4890 covers the PMU, PSU, DCDU-04, and DCDU-03.

Conventions

Symbol Conventions

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

Symbol Description

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

avoided,will result in death or serious injury.

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

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

Indicates a potentially hazardous situation, which if not

avoided,could result in equipment damage, data loss,

performance degradation, or unexpected results.

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

time.

Provides additional information to emphasize or supplementimportant points of the main text.

General Conventions

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

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

boldface. For example, log in as userroot.

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Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

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


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

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

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

vertical bars. One item is selected.

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

vertical bars. One item is selected or no item is selected.

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

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

items can be selected.

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

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

GUI Conventions

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


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

are in boldface. For example, clickOK.

> 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.

Format Description

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

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Format Description

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 moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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1 Changes in the BTS3900 WCDMA SiteMaintenance Guide

This describes the changes in theBTS3900 WCDMA Site Maintenance Guide.

01 (2008-03-30)

This is the initial field trial release.

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2 Preparations for NodeB Site MaintenanceThis describes the preparations for site maintenance. The preparations for site maintenance

involve obtaining site information, selecting maintenance items, and arranging maintenance

tools and spare parts.

Obtaining Site Information

Before you maintain the site, obtain the following information:

l Unsolved faults and alarms

l Hardware configurations

l Local environment

l Spare parts

Selecting Maintenance Items

Select suitable maintenance items based on actual requirements of the . The maintenance items

are as follows:

l Maintaining the equipment room environment of the

l Maintaining power supply and grounding system of the

l Maintaining the main components in the

l Maintaining the antenna system of the

Arranging Tools and Spare Parts

Arrange the related maintenance tools and spare parts based on the site information and

maintenance items of the .

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

l The frequency test devices, which involve a frequency generator, a spectrum analyzer, and

various connectors and cables.

l

Power test devices used to test and analyze the output power of the . A commonly usedpower test device, namely, a power meter.

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l The antenna and feeder test devices used to test the standing wave ratio, return loss, and

cable insertion loss, and to locate faults. The commonly used antenna and feeder test device

is the SiteMaster.

l Other devices

Multimeter

Diagnosis tools for maintenance and test/test devices for robustness of the

Local Maintenance Terminal (LMT)

Rubidium clock (used to locate the clock of the )

Spare parts

NOTE

When some parts are faulty and thus need to be replaced, arrange related tools and new parts for

replacement.

2 Preparations for NodeB Site Maintenance

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3Hardware Items of BTS3900 RoutineMaintenance

About This Chapter

This describes the routine maintenance for the hardware items in the BTS3900. The hardware

items that are routinely maintained refer to the equipment room environment of the , power

supply and grounding system of the , and main components in the BTS3900.

3.1 Maintaining Items of the Equipment Room Environment of the NodeB

This provides the maintenance items, maintenance intervals, operation instructions, and

reference standards of the equipment room environment.

3.2 Power Supply and Grounding System Maintenance Items of the NodeB


reference standards of the power supply and grounding system.

3.3 Maintenance of the Main Components in the BTS3900

This describes the maintenance items, maintenance interval, operating instruction, and reference

standard of the main components in the BTS3900.

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3.1 Maintaining Items of the Equipment RoomEnvironment of the NodeB


reference standards of the equipment room environment.

Table 3-1 describes how to maintain the equipment room environment.

Table 3-1 Maintenance items of the equipment room environment of the

Item Interval Operating Instruction Reference Standard

Checking

environmental

alarms

Daily Check whether power

supply alarms, fire alarms,

or smoke alarms arereported.

No power supply alarms,

fire alarms, or smoke

alarms are reported.

Checking the

temperature in

the equipment

room

Weekly Record the temperature read

on the thermometer in the

equipment room.

-20 to +50

Checking the

temperature in

the equipment

room

Weekly Record the humidity read on

the hygrometer in the

equipment room.

5% to 85%

Checking theillumination in

the equipment

room

Every twomonths

Check whether the routineand emergency illumination

in the equipment room is

normal.

-

Checking the air

conditioner

Every two

months

Check whether the air

conditioner is working

normally.

-

Checking

protective

devices

Every two

months

Check whether anti-disaster

devices, equipment

protection devices, and fire-

protection devices are in

good condition.

l The foam extinguisher or

dry powder fire

extinguisher is installed

in the equipment room.

In addition, the pressure

and period of validity of

the extinguisher meet the

requirement.

l There is no danger of

damage to the equipment

by rats or insects.


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Cleaning the

equipment

room

Every two

months

Check whether cabinets,

equipment housing,

equipment interior, tables,

floor, doors, and windows

are clean.

All the items to be checked

are clean.

3.2 Power Supply and Grounding System MaintenanceItems of the NodeB


reference standards of the power supply and grounding system.

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

of the .

Table 3-2 Maintenance items of the power supply and grounding system of the

Item Interval Operating Instruction

Reference Standard

Checking power

cables

Monthly Check the connections

of power cables

carefully.

The power cables are not

aging, and there is no

corrosion on the

connection points.

Checking thevoltage

Monthly Measure the voltage of the power supply by

using a multimeter.

The voltage is withinstandard range.

Checking PGND

cables

Monthly Check whether the

PGND cable and

grounding bar are

connected properly.

The connections of the

PGND cable are sound. It

is not aging. The

connection points are

sound with no corrosion

on them.

Earth resistance Monthly Measure the earth

resistance by using an

electric earth resistance

tester and keep a record.

The grounding resistance

of the cabinet is smaller

than 10 ohms.

Checking the

storage batteries

Yearly Check the storage

batteries and rectifiers

every year.

The battery capacity is

within the normal range

and the batteries are

correctly connected. The

performance parameters

of rectifiers are normal.

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3.3 Maintenance of the Main Components in the BTS3900

This describes the maintenance items, maintenance interval, operating instruction, and reference

standard of the main components in the BTS3900.

Table 3-3 describes the maintenance items of the main components in the BTS3900.

Table 3-3 Maintenance items of the main components in the BTS3900


Checking the

fans

Monthly Check whether the fans are

operational.

The fans work properly

without exceptional

sounds generated by

frictions between the

blades of the fan and the

subrack.

Checking the

air filter

Quarterly If there is too much dust on the

air filter, clean the air filter.

-

Checking the

exterior of the

cabinet

Quarterly Check whether there are dents,

cracks, holes, or corrosion on

the surface of the cabinet and

whether the cabinet label is

legible.

-

Checking thelock and door

of the cabinet

Quarterly Check whether the lock isnormal and the door can be

opened and closed easily.

-

Checking the

cleanness of

the cabinet

Quarterly Check whether the cabinet is

clean.

The cabinet surface is

clean. The subracks are

not dusty.

Checking the

fan box

Annually If there is too much dust on the

surface of or inside the fan box,

clean the fan box.

-

Checking

LEDs on theboards

Monthly Check whether the LEDs on the

boards are normal.

For details about the

status of LEDs, see thehardware description

about the corresponding

boards.

Checking the

ESD wrist

strap

Quarterly Use either of the following

methods:

l Use an ESD wrist strap tester

to test the ESD wrist strap.

l Use a multimeter to test the

earth resistance of the ESD

wrist strap.

l If you are using an

ESD wrist strap tester,

the LED GOOD is on.

l If you are using a

multimeter, the earth

resistance is between

0.75 megohm and 10

megohms.


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4 Powering On/Off the BTS3900About This Chapter

When maintaining the BTS3900, you need to power on or power off the BTS3900. You must

power on the BTS3900 according to the specific procedure and requirements, and you can power

off the BTS3900 in a normal situation or in an emergency.

4.1 Powering On the BTS3900

This describes how to power on the BTS3900.

4.2 Powering Off the BTS3900

This describes how to power off the BTS3900 in a normal situation and in an emergency. You

must power off the BTS3900 in a normal situation such as moving the equipment or anticipating

a territorial blackout. You must also power off the BTS3900 in an emergency such as a fire,

smoke, or water immersion occurs in the equipment room.

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4.1 Powering On the BTS3900

This describes how to power on the BTS3900.

Prerequisite

l The power switches on the DCDU-01 of the BTS3900 are all set to OFF.

l The power supply to the BTS3900 is cut off.

l The components to be replaced in the BTS3900 are replaced.

Context

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

Figure 4-1 DCDU-01 panel

Table 4-1 lists the power switches on the DCDU-01 panel.

Table 4-1 Power switches on the DCDU-01 panel

Module Power Switch

SPARE2

BBU BBU

Standby BBU SPARE1

FAN FAN

RFU in slot 0 RFU0

RFU in slot 1 RFU1

RFU in slot 2 RFU2


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Module Power Switch

RFU in slot 3 RFU3

RFU in slot 4 RFU4

RFU in slot 5 RFU5

NOTE

The RFUs are in slots 0 to 5 from left to right.

Procedure

Step 1 Set the main power switch of the BTS3900 to ON.

Step 2 Set the DC power switch labeled FAN on the DCDU-01 panel to ON.

Step 3 Set the DC power switch labeled BBU on the DCDU-01 panel to ON.

NOTE

If a standby BBU is configured, set the DC power distribution switch labeled SPARE1 on the DCDU-01

panel to ON so that the standby BBU is powered on.

Step 4 Set the DC power switches labeled RFU0 to RFU5 on the DCDU-01 panel to ON.

----End

PostrequisiteAfter the components are powered on, you must check whether the power supply to the

components are normal according to Table 4-2.

Table 4-2 Checklist for power supply to the components in the cabinet

Component LED Status

FAN RUN LED is green and blinks every other second.

BBU

WMPT RUN LED is steady green or blinks every other

second.

UBFA STATE LED is green and blinks every other second.

UPEU RUN LED is steady green.

UPEB RUN LED is steady green.

UTRP RUN LED is steady green or blinks every other

second.

WBBP RUN LED is steady green or blinks every other

second.

RFU0 to RFU5 RUN LED is green and blinks every other second.

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Component LED Status

PMU STATE LED is green and blinks every other second

or blinks every other 0.125 second.

PSU Power input LED is steady green.

NOTE

l If the RUN LED of the WMPT, UTRP, or WBBP board is steady green, you can infer that the power

supply to the board is normal, but the board is faulty.

l If the RUN LED of the PMU is green and blinks every other 0.125 second, you can infer that the PMU

works properly, but the communication with the RNC fails.

4.2 Powering Off the BTS3900

This describes how to power off the BTS3900 in a normal situation and in an emergency. You

must power off the BTS3900 in a normal situation such as moving the equipment or anticipating

a territorial blackout. You must also power off the BTS3900 in an emergency such as a fire,

smoke, or water immersion occurs in the equipment room.

Context

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

Figure 4-2 DCDU-01 panel

Table 4-3 lists the power switches on the DCDU-01 panel.

Table 4-3 Power switches on the DCDU-01 panel

Module Power Switch

SPARE2

BBU BBU


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Module Power Switch

Standby BBU SPARE1

FAN FAN

RFU in slot 0 RFU0

RFU in slot 1 RFU1

RFU in slot 2 RFU2

RFU in slot 3 RFU3

RFU in slot 4 RFU4

RFU in slot 5 RFU5

NOTE

The RFUs are in slots 0 to 5 from left to right.

Procedure

l Power off the BTS3900 in a normal situation.

1. Set the DC power distribution switches labeled RFU0 to RFU5 on the DCDU-01 to

OFF.

2. Set the DC power distribution switch labeled BBU on the DCDU-01 to OFF.

3. Set the DC power distribution switch labeled FAN on the DCDU-01 to OFF.

4. Set the DC power distribution switches labeled SPARE1 and SPARE2 on theDCDU-01 to OFF.

5. Set the main power switch to OFF.

l Power off the BTS3900 in an emergency.

CAUTION

Powering off the BTS3900 in an emergency may damage the equipment or boards. Do not

use this method in any situation other than in an emergency.

1. Set the main power switch to OFF.

2. Set all the DC power distribution switches on the DCDU-01 to OFF if time permits.

----End

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5 Replacing Components of the BTS3900About This Chapter

This describes how to replace the faulty BTS3900 components. The faulty components must be

replaced in time. The replaceable components in the BTS3900 are the BBU3900 case,

BBU3900 board or module, DCDU-01, FAN module, PMU/PSU, SLPU, WRFU, and

BTS3900 power subrack.

5.1 Replacing a BBU3900 Case

This describes how to replace a BBU3900 case. The BBU3900, which is a core module of the

NodeB, processes baseband signals of the entire NodeB system and provides transport interfaces

for communication with other NEs, namely, RNC, RRU, WRFU. Replacing the BBU3900interrupts all the services carried by the NodeB.

5.2 Replacing a Board or Module of the BBU3900

This describes how to replace a board or module of the BBU3900. All transmission ports of the

BBU3900 are on the boards and module. Replacing a board or module may disrupt all the

services carried by the NodeB.

5.3 Replacing a DCDU-01 Module

The DCDU-01, installed under the BBU, supplies DC power for the cabinet and has the function

of surge protection. Replacing the DCDU-01 disrupts the services carried on the corresponding

cabinet. It takes about 20 minutes to replace the DCDU-01.

5.4 Replacing the FAN UnitThe FAN unit works with the air inlet box in the cabinet to form a ventilation path. The FAN

unit provides forced ventilation and dissipation for the BBU and RFU. Replacing the FAN unit

may result in over-temperature alarms due to interruption of heat dissipation for the cabinet but

has no negative effect on services of the BTS. It takes about 20 minutes to replace a FAN unit.

5.5 Replacing the PMU

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

5.6 Replacing a PSU

When a PSU is faulty and cannot be repaired in time, you must replace it.

5.7 Replacing an SLPU

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This describes how to replace an SLPU. The SLPU is positioned above the BBU and used for

surge protection of the NodeB. Replacing the SLPU interrupts the services carried by the NodeB.

It takes about 10 minutes to replace an SLPU module.

5.8 Replacing a WRFU Module

This describes how to replace WRFU. The WRFU is located on the top of the BTS3900 cabinet.The WRFU provides the following functions: modulation and demodulation of baseband or RF

signals, data processing, and signal combination and division. The replacement of the WRFU

disrupts the services carried on it. It takes about 10 minutes to replace a RFU module.

5.9 Replacing the Power Supply Subrack of the BTS3900

The power supply subrack is located in the lower cabinet of the BTS3900. It can be installed

with the PSU and PMU to provide the power input and output ports. It takes about 25 minutes

to replace the power supply subrack.


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5.1 Replacing a BBU3900 Case

This describes how to replace a BBU3900 case. The BBU3900, which is a core module of the

NodeB, processes baseband signals of the entire NodeB system and provides transport interfaces

for communication with other NEs, namely, RNC, RRU, WRFU. Replacing the BBU3900

interrupts all the services carried by the NodeB.

Prerequisite

The tools and materials, such as the ESD wrist strap or gloves, cross screwdriver, ESD box or

bag, and key to the cabinet door are ready.

Procedure

Step 1 Run ULD CFGFILE on the LMT to upload the NodeB data configuration file to the LMTmaintenance computer.

Step 2 Power off the BBU3900 by referring to Powering Off the BBU3900, and turn off the powerswitch of the external power supply to the BBU3900.

Step 3 Label the BBU3900 cables, disconnect them, and then take insulation measures for the cables.

NOTE

Disconnect the BBU3900 cables in the sequence of the power cable, alarm cable, FE cable, E1 cable, CPRI

optical cable, and PGND cable.

Step 4 Use the cross screwdriver to remove the four panel screws.

Step 5 Pull the faulty BBU3900 case out of the cabinet.Step 6 Insert a new BBU3900 case into the slot. Then, push the new BBU3900 case until it is in position.

Step 7 Tighten the panel screws to secure the new BBU3900 case.

Step 8 Connect the cables to the BBU in turn according to the labels.

Step 9 Turn on the power switch of the external power supply to the BBU3900. Then, power on theBBU3900 by referring to Powering on the BBU3900.

Step 10 On the LMT, run the DLD CFGFILE command to download the NodeB data configuration fileto the new BBU3900.

Step 11 Run LST VERto query the software version and the BootROM version. If it is not correct,update the version.

Step 12 Run RST NODEB to restart the NodeB.

----End

Postrequisite

After replacing the faulty BBU3900 case, check the following items:

l On the M2000 or LMT, the related alarms are cleared.

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

Contact the local Huawei office to handle the faulty BBU3900 case.

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5.2 Replacing a Board or Module of the BBU3900

This describes how to replace a board or module of the BBU3900. All transmission ports of the

BBU3900 are on the boards and module. Replacing a board or module may disrupt all the

services carried by the NodeB.

Prerequisite

The tools and materials, such as the ESD wrist strap or gloves, cross screwdriver, ESD box or

bag, and key to the cabinet door are ready.

Procedure

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

Step 2 Remove the faulty board or module.

1. Record the connections of the cables on the faulty board or module. Then, disconnect the

cables.

2. Loosen the screws on both sides of the faulty board or module.

3. If the ejector lever is configured, turn outwards the ejector lever and then pull the faulty

board or module out of the slot. If no ejector lever is configured, pull out the board or

module directly.

4. Place the faulty board or module in an ESD bag.

Step 3 Install a new board or module.

1. Insert a new board or module into the slot. Then, push the board or module until it is inposition.

2. Turn inwards the ejector lever and then tighten the screws on both sides of the new board

or module.

3. If necessary, connect the cables to the new board or module based on the recorded

connections.

Step 4 Check whether the board or module is operational.

l When the board is operational, the RUN LED blinks at 0.5 Hz and the ALM LED is OFF.

When the module is operational, the STATE LED blinks at 0.5 Hz.

l If the board works in active/standby mode, the ACT LED is ON when the board is in active

mode. The ACT LED is OFF when the board is in standby mode.

NOTE

For details of the LEDs on the boards and module, refer to the hardware description of the BBU3900.

Step 5 Check whether alarms are reported.

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

2. If active alarms are reported, clear them according to troubleshooting suggestions. If no

active alarm is reported, go to Step 6.

Step 6 Activate the BootROM or software version of the board or module.

1. Run the DSP BRDVERcommand to check whether the BootROM or software version iscorrect.


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2. If the BootROM or software version is wrong, run the ACT SOFTWARE command to

activate the BootROM or software version of the board or module.

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

----End

Postrequisite

Contact the local Huawei office to handle the faulty board or module.

5.3 Replacing a DCDU-01 Module

The DCDU-01, installed under the BBU, supplies DC power for the cabinet and has the function

of surge protection. Replacing the DCDU-01 disrupts the services carried on the corresponding

cabinet. It takes about 20 minutes to replace the DCDU-01.

Prerequisite

l The model of the faulty DCDU-01 is confirmed and the new DCDU-01 of the same model

is available.

l The new DCDU-01 module is intact, and the hardware version of the new DCDU-01 is

consistent with that of the faulty DCDU-01.

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

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

Context

CAUTION

Take proper ESD protection measures, for example, wear an ESD wrist strap or a pair of ESD

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

Procedure

Step 1 Power off the BTS3900.

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

Step 3 Use the Phillips screwdriver to remove the protection cover from the external power input wiringterminal block of the DCDU-01, as shown in Figure 5-1.

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Figure 5-1 Removing the protection cover

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

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

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

5-2.

Figure 5-2 Removing the screws on the two mounting ears of the module

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

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

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

Step 9 Insert the OT terminal of the power cable into the corresponding cable hole in the wiring terminal

block. Connect the OT terminal of the -48 V power cable (blue) to the terminal labeled NEG(-),and then connect the OT terminal of the GND cable (black) to the terminal labeled RTN(+).


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Step 10 Place the protection cover on the DCDU-01, and then tighten the screw on the protection coverby using the Phillips screwdriver.

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

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

Step 13 Power on the BTS3900.

----End

Postrequisite

After replacing the DCDU-01, perform the following operations:

l Check that the cable connections are correct and secure.

l

Ensure that the related alarms are cleared on the M2000 or LMT after the equipment ispowered on.

l Contact the local Huawei office to handle the faulty DCDU-01 module.

5.4 Replacing the FAN Unit

The FAN unit works with the air inlet box in the cabinet to form a ventilation path. The FAN

unit provides forced ventilation and dissipation for the BBU and RFU. Replacing the FAN unit

may result in over-temperature alarms due to interruption of heat dissipation for the cabinet but

has no negative effect on services of the BTS. It takes about 20 minutes to replace a FAN unit.

Prerequisite

l A new FAN unit is ready.

l Ensure that the new FAN unit is in good condition and the version of the new FAN unit is

consistent with that of the faulty FAN unit.

l The required tools and materials, such as ESD wrist strap, Phillips screwdriver, ESD box

or bag, and the key to the cabinet door, are available.

Context

CAUTION

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

the boards, modules, and electronic components from being damaged by the static electricity

generated by human body.

Procedure

Step 1 Set the DC distribution switch FAN labeled on the DCDU-01 to OFF. Figure 5-3 shows theposition of the FAN unit switch on the DCDU-01.

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Figure 5-3 Position of the FAN unit switch

Step 2 Label the cables on the panel of the FAN unit and then remove the cables.

Step 3 Loosen the captive screws on both sides of the adjustable cable trough. Then, raise the cabletrough and fix it at the upper mounting hole, as shown in Figure 5-4.

Figure 5-4 Raising the adjustable cable trough

(1) Upper mounting hole (2) Captive screw


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

Figure 5-5 Removing the FAN unit

Step 5 Pull out the fan subrack by one-third of its length with one hand, hold the fan subrack with theother hand, and then pull the entire fan subrack out of the cabinet.

Step 6 Put the new FAN unit into the fan subrack. Then, secure the four screws on the fan subrack.

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

Step 8 Install the cables to the panel of the FAN unit based on the labels.

Step 9 Set the FAN unit switch on the DCDU-01 to ON.

----End

Postrequisite

After replacing the FAN unit, perform the following operations:

l Check the cables and ensure that they are correctly and tightly connected.

l Ensure the RUN LED on the panel is green and blinks at 0.5 Hz when the equipment is

powered on.

l Ensure that the related alarms are cleared after the equipment is powered on.

l

Contact the local Huawei office to dispose of the faulty FAN unit.

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Prerequisite

l The type of faulty PMU is confirmed and the new PMU is ready.

l The new PMU is intact and its version is consistent with the version of the faulty PMU.

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

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

Context

CAUTION

Take proper ESD prevention measures, for example, wearing an ESD wrist strap or a pair of

ESD gloves, to protect the PMU from electrostatic damage.

Procedure

Step 1 Disconnect the cables from the panel of the PMU, and then label the cables.

CAUTION

When inserting or removing the DB50 connector of the environment monitoring signal cable,

you must hold the connector with both hands and keep it perpendicular to the panel, to prevent

false alarms caused by bent pins.

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

Step 3 Pull the handle gently to disconnect the buckle of the PMU from the subrack, and then removethe PMU from the slot, as shown in Figure 5-6.

Figure 5-6 Removing the PMU


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Step 4 Set the DIP switch of the new PMU to 11000000.

Step 5 Place the new PMU in the corresponding slot and loosen the screws on the handle of the PMU.Then, pull the handle outwards.

Step 6 Slide the PMU along the guide rails into the slot and then push the handle back.

Step 7 Tighten the screws on the handle, as shown in Figure 5-7.

Figure 5-7 Installing the PMU

Step 8 Connect the cables, which have been disconnected from the PMU.

----End

Postrequisite

After replacing the PMU, check the following items:

l The cables are correctly and tightly connected.

l The RUN LED on the panel blinks green at 0.5 Hz after the PMU is powered on.


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

5.6 Replacing a PSU


Prerequisite

l The type of faulty PSU is confirmed and the new PSU is ready.

l The new PSU is intact and its version is consistent with the version of the faulty PSU.



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Context

CAUTION


ESD gloves, to protect the PSU from electrostatic damage.

Procedure

Step 1 Loosen the screws on the handle of the PSU panel by using a flathead screwdriver.

Step 2 Pull the handle gently to disconnect the buckle of the PSU from the subrack, and then removethe PSU from the slot, as shown in Figure 5-8.

Figure 5-8 Removing the PSU

Step 3 Place the new PSU in the corresponding slot and loosen the screws on the handle of the PSU.Then, pull the handle outwards.

Step 4 Slide the PSU along the guide rails into the slot and then push the handle back.


Figure 5-9 Installing the PSU

----End

Postrequisite

After replacing the PSU, check the following items:


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l The power LED on the PSU is ON (green) after the PSU is powered on.


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

5.7 Replacing an SLPU

This describes how to replace an SLPU. The SLPU is positioned above the BBU and used for

surge protection of the NodeB. Replacing the SLPU interrupts the services carried by the NodeB.

It takes about 10 minutes to replace an SLPU module.

Prerequisite

l The type of faulty SLPU is confirmed and the new SLPU is ready.

l The new SLPU is intact and its version is consistent with the version of the faulty SLPU.

l The tools and materials are ready. The tools and materials are the ESD wrist strap or gloves,cross screwdriver, ESD box or bag, and key to the cabinet door.

Context

Take proper ESD protection measures, for example, wearing an ESD wrist strap or a pair of

ESD gloves, to prevent electrostatic damage to the board, module, or electronic parts.

Procedure

Step 1 Attach labels to the cables on the SLPU panel, and then remove the cables.

Step 2 Remove the four screws on the mounting ears fixing the SLPU.

Step 3 Pull the SLPU with one hand until 1/3 of the SLPU is out. Hold the SLPU with another handand continue to pull it until it is completely removed from the cabinet.

Step 4 Put the removed SLPU into the ESD box or bag.

Step 5 Insert the new SLPU and then fasten the four screws removed from the mounting ears.

Step 6 Reinstall the cables onto the ports on the SLPU panel according to the labels.

----End

Postrequisite

After replacing the SLPU, check the following items:

l The cables are tightly and correctly connected.

l The related alarms on the M2000 or LMT are cleared after the SLPU is powered on.

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

5.8 Replacing a WRFU Module

This describes how to replace WRFU. The WRFU is located on the top of the BTS3900 cabinet.The WRFU provides the following functions: modulation and demodulation of baseband or RF

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signals, data processing, and signal combination and division. The replacement of the WRFU

disrupts the services carried on it. It takes about 10 minutes to replace a RFU module.

Prerequisite

l The type of the faulty WRFU module is obtained, and a new WRFU module is available.

l The new WRFU module is intact and the hardware version of the new WRFU is consistent

with that of the faulty WRFU module.

l The required tools and materials are ready. They are a torque wrench, an ESD wrist strap,

a Phillips screwdriver, an ESD box or bag, dustfree cloth, the key to the cabinet door, and

the standard handle.

Context

CAUTION

l Take proper ESD prevention measures, for example, wear an ESD wrist strap or ESD gloves

to prevent the boards, modules, and electronic components from being damaged by the static

electricity generated by the human body.

l Hold the RFU module with care as it is heavy.

Procedure

Step 1 Locate the faulty RFU and then run the BLK BRD command on the LMT to disable the faultyWRFU.

NOTE

This step can be performed either locally or remotely. Remote maintenance is suggested, though.

Step 2 Set the RFU switch on the DCDU-01 that corresponds to the RFU to OFF. The position of theRFU is shown in Figure 5-10.

Figure 5-10 Position of the RFU

Step 3 Label the cables connected to the RFU panel, and then disconnect the cables.


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Step 4 Use a Phillips screwdriver to loosen the four captive screws on the RFU panel.

Step 5 Insert the standard handle into the RFU to the corresponding keyhole on the RFU panel, andturn the handle key by 90. Pull out the module by holding the handle key using one hand, and

then remove the RFU using the other hand, as shown in Figure 5-11.

Figure 5-11 Removing the RFU

Step 6 Slide the new RFU along its guide rail until the module is in position (with obvious resistance).

Step 7 Tighten the four captive screws at four corners on the RFU panel so as to connect the RFUsecurely to the subrack.

Step 8 Install the cables to the ports on the RFU panel according to the labels.

Step 9 Set the RFU switch on the DCDU-01 that corresponds to the RFU to ON.

Step 10 Activate the BootROM or the software version of the new WRFU.

1. Run the DSP BRDVERcommand to check whether the BootROM or the software version

of the new WRFU are correct on the LMT.

2. If the software version is incorrect, run the ACT SOFTWARE command to reactivate the

BootROM or the software version of the WRFU on the LMT.

Step 11 On the LMT, run the UBL BRD command to unblock the board.

----End

Postrequisite

After replacing the RFU module, verify the following items:

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l The cable connections are correct and secure.

l After the RFU module is powered on, the RUN LED on the panel is green and blinks at

0.5 Hz.

l On the M2000 or the LMT, the alarms related to the RFU module are cleared after the RFU

module is powered on.

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

5.9 Replacing the Power Supply Subrack of the BTS3900

The power supply subrack is located in the lower cabinet of the BTS3900. It can be installed

with the PSU and PMU to provide the power input and output ports. It takes about 25 minutes

to replace the power supply subrack.

Prerequisite

l Confirm the model of the faulty power supply subrack and have the new power supply

subrack of the same type ready.

l The required tools and materials, such as ESD wrist strap, Phillips screwdriver, ESD box

or bag, and the key to the cabinet door, are available.

Context

CAUTION

Take proper ESD prevention measures, for example, wear an ESD wrist strap or gloves to preventthe boards, modules, and electronic components from being damaged by the static electricity

generated by human body.

Procedure

Step 1 Power off the BTS3900.

Step 2 Mark the cables on the power supply subrack and the PMU, and then disconnect them.

Step 3 Loosen the two screws on the panel of the PMU/PSU in the power supply subrack, as shown in

Figure 5-12.


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Figure 5-12 Removing the PMU/PSU

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

NOTE

Figure 5-12 shows the PMU, because the position of the two screws on the PSU panel is the same as that

on the PMU panel.

Step 4 Pull out the PMU or PSU along the guide rails by holding the ejector lever on the PMU/PSUpanel, as shown in Figure 5-12.

Step 5 Repeat Step 3 through Step 4 to remove all the PMUs/PSUs from the power supply subrack,and then put them into the ESD box.

Step 6 Remove the four M6x12 strews on the two mounting ears of the power supply subrack, as shownin Figure 5-13.

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Figure 5-13 Removing the screws from the mounting ears

Step 7 Pull out the power supply subrack with one hand, hold the power supply subrack with the otherhand, and then remove it.

Step 8 Put the faulty power supply subrack into an ESD box.

Step 9 Reversely perform the previous steps to install the new power supply subrack and removedPMUs/PSUs into the cabinet.

Step 10 Connect the removed cables to the ports on the panel of the power supply subrack and on thatof the PMU according to the marks.

Step 11 Power on the BTS3900.

----End

Postrequisite

After replacing the power supply subrack, perform the following operations:

l Check the cables and ensure that they are correctly and tightly connected.

l Ensure that the related alarms are cleared after the equipment is powered on.

l Contact the local Huawei office to handle the faulty power supply subrack.


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6Maintaining the PS4890About This Chapter

The hardware maintenance of the PS4890 covers the PMU, PSU, DCDU-04, and DCDU-03.



6.2 Replacing a PSU


6.3 Replacing the DCDU-04

When the DCDU-04 is faulty, you must replace it.



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Prerequisite

l The type of faulty PMU is confirmed and the new PMU is ready.

l The new PMU is intact and its version is consistent with the version of the faulty PMU.



Context

CAUTION


ESD gloves, to protect the PMU from electrostatic damage.

Procedure

Step 1 Disconnect the cables from the panel of the PMU, and then label the cables.

CAUTION




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

Step 3 Pull the handle gently to disconnect the buckle of the PMU from the subrack, and then removethe PMU from the slot, as shown in Figure 6-1.

Figure 6-1 Removing the PMU


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Step 4 Set the DIP switch of the new PMU to 11000000.

Step 5 Place the new PMU in the corresponding slot and loosen the screws on the handle of the PMU.Then, pull the handle outwards.

Step 6 Slide the PMU along the guide rails into the slot and then push the handle back.


Figure 6-2 Installing the PMU

Step 8 Connect the cables, which have been disconnected from the PMU.

----End

Postrequisite

After replacing the PMU, check the following items:

l The cables are correctly and tightly connected.

l The RUN LED on the panel blinks green at 0.5 Hz after the PMU is powered on.


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

6.2 Replacing a PSU


Prerequisite

l The type of faulty PSU is confirmed and the new PSU is ready.

l The new PSU is intact and its version is consistent with the version of the faulty PSU.



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Context

CAUTION


ESD gloves, to protect the PSU from electrostatic damage.

Procedure

Step 1 Loosen the screws on the handle of the PSU panel by using a flathead screwdriver.

Step 2 Pull the handle gently to disconnect the buckle of the PSU from the subrack, and then removethe PSU from the slot, as shown in Figure 6-3.

Figure 6-3 Removing the PSU

Step 3 Place the new PSU in the corresponding slot and loosen the screws on the handle of the PSU.Then, pull the handle outwards.

Step 4 Slide the PSU along the guide rails into the slot and then push the handle back.


Figure 6-4 Installing the PSU

----End

Postrequisite

After replacing the PSU, check the following items:


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l The power LED on the PSU is ON (green) after the PSU is powered on.


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



Prerequisite

l The type of faulty DCDU-04 is confirmed and the new DCDU-04 is ready.

l The new DCDU-04 is intact and its version is consistent with the version of the faulty

DCDU-04.



Context

CAUTION

Cut off the AC input power of the PS4890 cabinet and set the MCB of the batteries to OFF before

replacing the DCDU-04. This ensures the personal safety.

Procedure

Step 1 Cut off the AC input power of the PS4890 cabinet.

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

Step 3 Set the DC output MCBs labeled SW0 and SW1 of the DCDU-04 to OFF.

Step 4 Disconnect the input power cable of the DCDU-04 from the DC output wiring terminalLOAD1 on the power subrack, and label the cables.

Step 5 Disconnect the temperature monitoring signal cable for the batteries, the surge protection alarmcable of the DCDU-03, and the environment monitoring signal cable for the power cabinet from

the HPMI board in the middle of the DCDU-04. And record the connection of each cable.

CAUTION




Step 6 Disconnect the DC output power cables from the left and right wiring terminals on the DCDU-04,and then label the cables and record the connections of the cables.

Step 7 Remove the screws M6x12 from the DCDU-04, and then pull the DCDU-04 out slowly.

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Step 8 Place the new DCDU-04 on the installation position and push it slowly until it is in position.Then, tighten the screws M6x12.

Step 9 Connect the cables removed in Step 5 to the wiring terminals of the new DCDU-04.

Step 10 Connect the input power cable of the DCDU-04 to the DC output wiring terminal LOAD1 onthe power subrack.

Step 11 Connect the DC output power cables.

Step 12 Check the cable connections and ensure that the cables are correctly connected. Then, feed theAC input power to the PS4890 cabinet.

Step 13 Set the MCB labeled BAT. on the panel of the power subrack and all the MCBs on the DCDU-04to ON.

----End

Postrequisite

After replacing the DCDU-04, check the following items:

l The DCDU-04 is securely installed, and the cables are correctly connected.

l The DC output power of the DCDU-04 is normal.


l Contact the local Huawei office to handle the faulty DCDU-04.



Prerequisite

l The type of faulty DCDU-03 is confirmed and the new DCDU-03 is ready.

l The new DCDU-03 is intact and its version is consistent with the version of the faulty

DCDU-03.



Context

CAUTION

Cut off the AC input power of the PS4890 cabinet and set the MCB of the batteries to OFF before

replacing the DCDU-03. This ensures the personal safety.

Procedure

Step 1 Cut off the AC input power of the PS4890 cabinet.


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

Step 3 Set all the DC output MCBs SW0 to SW9 on the DCDU-03 to OFF.

Step 4 Disconnect the surge protection alarm cable from the DCDU-03, and then label the cable and

record the connection of the cable.

Step 5 Disconnect the DC input power cable and DC output power cables from the DCDU-03, and thenlabel the cables and record the connections of the cables.

Step 6 Remove the screws M6x12 from the DCDU-03, and then pull the DCDU-03 out slowly.

Step 7 Place the new DCDU-03 on the installation position and push it slowly until it is in position.Then, tighten the screws M6x12.

Step 8 Connect the cables removed in Step 4 and Step 5 to the wiring terminals of the new DCDU-03according to the labels.

Step 9 Check the cable connections and ensure that the cables are correctly connected. Then, feed the

AC input power to the PS4890 cabinet.

Step 10 Set the MCB labeled BAT. on the panel of the power subrack and all the MCBs on the DCDU-03to ON.

----End

Postrequisite

After replacing the DCDU-03, check the following items:

l The DCDU-03 is securely installed, and the cables are correctly connected.

l The DC output power of the DCDU-03 is normal.


l Contact the local Huawei office to handle the faulty DCDU-03.

BTS3900 WCDMA


Documents

WCDMA Maintenance Guide