Bts3900 Site Maintenance Guide (v100r002_04) 6y3v52

BTS3900 V100R002

Site Maintenance Guide

Issue

04

Date

2010-01-20

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BTS3900 Site Maintenance Guide

Contents

Contents About This Document.....................................................................................................................1 1 Changes in the BTS3900 Site Maintenance Guide..............................................................1-1 2 Preparations for Base Station Site Maintenance..................................................................2-1 3 Hardware Items of BTS3900 Routine Maintenance............................................................3-1 3.1 Maintenance Items of the Equipment Room Environment.............................................................................3-2 3.2 Power Supply and Grounding System Maintenance Items.............................................................................3-3 3.3 Maintenance of the Main Components...........................................................................................................3-4

4 Powering On/Off the BTS3900................................................................................................4-1 4.1 Powering On the BTS3900.............................................................................................................................4-2 4.2 Powering Off the BTS3900.............................................................................................................................4-5

5 Replacing BTS3900 Components............................................................................................5-1 5.1 Replacing BBU3900 Parts..............................................................................................................................5-3 5.1.1 Querying Board Information..................................................................................................................5-4 5.1.2 Replacing the BBU3900.........................................................................................................................5-4 5.1.3 Replacing the GTMU.............................................................................................................................5-5 5.1.4 Replacing a WMPT................................................................................................................................5-8 5.1.5 Replacing a WBBP.................................................................................................................................5-9 5.1.6 Replacing the FAN Unit.......................................................................................................................5-10 5.1.7 Replacing the UPEU............................................................................................................................5-12 5.1.8 Replacing the UEIU.............................................................................................................................5-14 5.1.9 Replacing the USCU............................................................................................................................5-16 5.1.10 Replacing a UTRP..............................................................................................................................5-17 5.1.11 Replacing the UBRI...........................................................................................................................5-19 5.1.12 Replacing the Optical Module............................................................................................................5-19 5.2 Replacing the RFU........................................................................................................................................5-22 5.3 Replacing a DCDU-01 Module.....................................................................................................................5-25 5.4 Replacing the Fan Box..................................................................................................................................5-27 5.5 Replacing the Power Subrack (AC/DC)........................................................................................................5-29 5.6 Replacing the PMU.......................................................................................................................................5-32 5.7 Replacing the PSU (AC/DC).........................................................................................................................5-34 5.8 Replacing the Power Subrack (DC/DC)........................................................................................................5-36 Issue 04 (2010-01-20)

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Contents

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

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BTS3900 Site Maintenance Guide

Figures

Figures Figure 4-1 of the DCDU-01.......................................................................................................................4-2 Figure 5-1 A label containing the bar code..........................................................................................................5-4 Figure 5-2 Position of the GTMU........................................................................................................................5-6 Figure 5-3 Disconnecting cables..........................................................................................................................5-6 Figure 5-4 Removing the GTMU.........................................................................................................................5-7 Figure 5-5 Connecting the GTMU.......................................................................................................................5-7 Figure 5-6 Position of the FAN unit...................................................................................................................5-11 Figure 5-7 Removing the FAN unit...................................................................................................................5-11 Figure 5-8 Position of the UPEU.......................................................................................................................5-12 Figure 5-9 Disconnecting cables........................................................................................................................5-13 Figure 5-10 Removing the UPEU......................................................................................................................5-13 Figure 5-11 Position of the UEIU......................................................................................................................5-14 Figure 5-12 Disconnecting cables......................................................................................................................5-15 Figure 5-13 Removing the UEIU.......................................................................................................................5-15 Figure 5-14 Position of the USCU.....................................................................................................................5-16 Figure 5-15 Disconnecting cables......................................................................................................................5-17 Figure 5-16 Removing the USCU......................................................................................................................5-17 Figure 5-17 Position of the optical module........................................................................................................5-20 Figure 5-18 Disconnecting cables......................................................................................................................5-21 Figure 5-19 Removing the optical module.........................................................................................................5-21 Figure 5-20 Removing an RFU..........................................................................................................................5-23 Figure 5-21 Position where the RFU handle key is placed................................................................................5-24 Figure 5-22 Removing the protection cover.......................................................................................................5-26 Figure 5-23 Removing the screws on the two mounting ears of the module.....................................................5-26 Figure 5-24 Position of the fan box switch........................................................................................................5-28 Figure 5-25 Raising the adjustable cable trough ...............................................................................................5-28 Figure 5-26 Removing the fan box.....................................................................................................................5-29 Figure 5-27 Removing the PMU or PSU (AC/DC)...........................................................................................5-31 Figure 5-28 Removing the screws on the mounting ears...................................................................................5-32 Figure 5-29 Removing the PMU........................................................................................................................5-33 Figure 5-30 Set the DIP switch..........................................................................................................................5-34 Figure 5-31 Installation procedure of the PMU.................................................................................................5-34 Figure 5-32 Removing the PSU (AC/DC).........................................................................................................5-35 Issue 04 (2010-01-20)

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Figures

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

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Tables

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

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BTS3900 Site Maintenance Guide

About This Document

About This Document

Purpose This document describes the routine hardware maintenance items of the BTS3900. The maintenance items are equipment room environment maintenance, power and grounding system maintenance, and cabinet maintenance. This document also describes the procedures for replacing components, modules, and boards.

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

Product Version

BTS3900

V100R002

Intended Audience This document is intended for: l

System engineers

l

Site maintainers

Organization 1 Changes in the BTS3900 Site Maintenance Guide This describes the changes in the BTS3900 Site Maintenance Guide. 2 Preparations for Base Station Site Maintenance This describes the preparations for base station site maintenance. The preparations for site maintenance involve obtaining site information, selecting maintenance items, and arranging maintenance tools and spare parts. Issue 04 (2010-01-20)

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BTS3900 Site Maintenance Guide

Organization

3 Hardware Items of BTS3900 Routine Maintenance This describes the routine maintenance for the hardware items in the cabinet. The hardware items that are routinely maintained refer to the equipment room environment of the BTS3900, power supply and grounding system, and main components in the BTS3900. 4 Powering On/Off the BTS3900 This describes how to power on or power off the BTS3900 during the maintenance of the BTS3900. When you power on the equipment, comply with related procedure and rules. When you power off the equipment, determine whether to perform normal power-off or emergency power-off according to field requirements. 5 Replacing BTS3900 Components Faulty BTS3900 components must be replaced in time. The replaceable components are the BBU3900 case, boards and module in the BBU3900, RFUs, DCDU-01, FAN unit, power subrack and PMU, PSUs, .

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 supplement important points of the main text.

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

2

Convention

Description

Times New Roman

Normal paragraphs are in Times New Roman.

Boldface

Names of files, directories, folders, and s are in boldface. For example, as root. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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Organization

Convention

Description

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. Convention

Description

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. Convention

Description

Boldface

Buttons, menus, parameters, tabs, window, and dialog titles are 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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Organization

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 means the two keys should be pressed in turn.

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

4

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 Site Maintenance Guide

Changes in the BTS3900 Site Maintenance Guide This describes the changes in the BTS3900 Site Maintenance Guide.

04 （2010-01-20） This is the third commercial release. Compared with issue 03 (2009-12-28), this issue incorporates the following changes: l

All of the Prerequisite and Postrequisite are changed.

This is the second commercial release. Compared with issue 02 (2009-10-15), this issue incorporates the following changes: l

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

l

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

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

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

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2 Preparations for Base Station Site Maintenance

2

Preparations for Base Station Site Maintenance

This describes the preparations for base station 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 base station 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 base station. The maintenance items are as follows: l

Maintaining the equipment room environment of the base station

l

Maintaining power supply and grounding system of the base station

l

Maintaining the main components in the base station

l

Maintaining the antenna system of the base station

Arranging Maintenance Tools and Spare Parts Arrange the related maintenance tools and spare parts based on the site information and maintenance 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. Power meter is a commonly used power test device.

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2 Preparations for Base Station Site Maintenance

BTS3900 Site Maintenance Guide

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 used antenna 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 for replacement.

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3 Hardware Items of BTS3900 Routine Maintenance

Hardware Items of BTS3900 Routine Maintenance

About This Chapter This describes the routine maintenance for the hardware items in the cabinet. The hardware items that are routinely maintained refer to the equipment room environment of the BTS3900, power supply and grounding system, and main components in the BTS3900. 3.1 Maintenance Items of the Equipment Room Environment 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 This provides the maintenance items, maintenance intervals, operation instructions, and reference standards for the power supply and grounding system of the base station. 3.3 Maintenance of the Main Components This describes the maintenance items, maintenance intervals, operating instructions, and reference standards of the main components in the cabinet.

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3 Hardware Items of BTS3900 Routine Maintenance

3.1 Maintenance Items of the Equipment Room Environment This provides the maintenance items, maintenance intervals, operation instructions, and reference standards of the equipment room environment. Table 3-1 describes the maintenance items of the equipment room environment. Table 3-1 Maintenance items of the equipment room environment

3-2

Item

Interval

Operating Instruction

Reference Standard

Checking environmental alarms

Daily

Check whether power supply alarms, fire alarms, or smoke alarms are reported.

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.

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

Checking the humidity in the equipment room

Weekly

Record the humidity read on the hygrometer in the equipment room.

Normal humidity range: 5% to 95%

Checking the illumination in the equipment room

Every two months

Check whether the routine and 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 fireprotection devices are in good condition.

l

The foam extinguisher or dry powder fire extinguisher is installed in the equipment room. The pressure and validity period of the extinguisher meet the requirements.

l

There is no danger of damage to the equipment by rats or insects.

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3 Hardware Items of BTS3900 Routine Maintenance

Item

Interval

Operating Instruction

Reference Standard

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 Maintenance Items This provides the maintenance items, maintenance intervals, operation instructions, and reference standards for the power supply and grounding system of the base station. Table 3-2 lists the routine maintenance items for the power supply and grounding system. Table 3-2 Routine maintenance items for the power supply and grounding system

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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 the voltage

Monthly

Measure the voltage of the power supply by using a multimeter.

The voltage is within normal 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

Annually

Check the storage batteries and rectifiers every year.

The battery capacity is within normal range and the batteries are correctly connected. The performance parameters of rectifiers are normal.

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3 Hardware Items of BTS3900 Routine Maintenance

3.3 Maintenance of the Main Components This describes the maintenance items, maintenance intervals, operating instructions, and reference standards of the main components in the cabinet. Table 3-3 describes the maintenance items of the main components in the cabinet. Table 3-3 Maintenance items of the main components in the cabinet Item

Interval

Operating Instruction

Reference Standard

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 LEDs on the boards

Monthly

Check whether the LEDs on the boards are normal.

For details about the status of LEDs, see the hardware description about the corresponding boards.

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 the lock and door of the cabinet

Quarterly

Check whether the lock is normal 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 ESD wrist strap

Quarterly

Use either of the following methods:

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.

l

l

Checking the fan box

3-4

Annually

Use an ESD wrist strap tester to test the ESD wrist strap. Use a multimeter to test the earth resistance of the ESD wrist strap.

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

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3 Hardware Items of BTS3900 Routine Maintenance

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4 Powering On/Off the BTS3900

4

Powering On/Off the BTS3900

About This Chapter This describes how to power on or power off the BTS3900 during the maintenance of the BTS3900. When you power on the equipment, comply with related procedure and rules. When you power off the equipment, determine whether to perform normal power-off or emergency power-off according to field requirements. 4.1 Powering On the BTS3900 This describes how to power on the BTS3900 and handle the power supply failure of internal components of the cabinet. 4.2 Powering Off the BTS3900 You can power off the BTS3900 by using two methods: normal power-off and emergency poweroff. You need to perform the normal power-off before an equipment swap or a foreseeable regional blackout. You need to perform the emergency power-off when a fire, smoke, or water immersion occurs in the equipment room.

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4 Powering On/Off the BTS3900

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

Prerequisite l

The input power cables are correctly and securely connected.

l

The power input of the BTS3900 meets the specifications listed in Power Supply Requirements of the BTS3900.

l

The power switches on the DCDU-01 in the BTS3900 are set to OFF.

l

The external power supply to the BTS3900 is cut off.

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

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

4-2

Power Switch

Module

SPARE2

Reserved

SPARE1

Reserved

BBU

BBU

FAN

FAN unit

RFU5

RFU in slot 5

RFU4

RFU in slot 4

RFU3

RFU in slot 3

RFU2

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Power Switch

Module

RFU1

RFU in slot 1

RFU0

RFU in slot 0

NOTE

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

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

Then…

The cabinet is a BTS3900 (+24 V) or BTS3900 (220 V) cabinet

Go to Step 2.

The cabinet is a BTS3900 (-48 V) cabinet,

Go to Step 3.

Step 2 Check whether the PSU works properly. For details, see PSU (AC/DC) or PSU (DC/DC). Step 3 Check whether the input voltage of the DCDU-01 in the BTS3900 is normal. If...

Then…

The input voltage of the DCDU-01 is not in The power supply in the cabinet is improper. the range from -38.4 V DC to -57 V DC Go to Step 4. The input voltage of the DCDU-01 is within The power-on check for the cabinet is the range from -38.4 V DC to -57 V DC complete. Go to Step 7. Step 4 Turn off the external power switch to power off the BTS3900. Step 5 Check the connections and routing of the power cables for the DCDU-01. Step 6 Go to Step 3 to check whether the output voltage of the DCDU-01 is normal. Step 7 Turn on the power switches on the DCDU-01, and then check the DC power supply to the internal components of the cabinet. Table 4-2 describes the power supply to the components. Table 4-2 Indication of normal power supply to the components

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Component

Indication of Normal Power Supply

BBU

GTMU

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

WMPT

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

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Component

Indication of Normal Power Supply

FAN unit

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

UPEU

The RUN LED is steady green.

WBBP

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

UBRI

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

Fan

The fan works properly, and the RUN LED on the of the FAN unit blinks green (ON for 1s and OFF for 1s).

RFU

The RUN LED on the of each RFU blinks green (ON for 1s and OFF for 1s).

PMU

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

PSU(AC/DC)

Power input LED is steady green.

PSU(DC/DC)

Step 8 If the power supply to the components fails after the cabinet is powered on, perform troubleshooting as described in Table 4-3. Table 4-3 Troubleshooting

4-4

Fault Type

Handling Measures

Failure of power supply to all the internal components of the cabinet

Check whether the GND and -48 V power cables are inversely connected. l

If the cable connection is wrong, set all the power switches to OFF, and then reconnect the power cables.

l

If the cable connection is correct, replace the DCDU-01.

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Fault Type

Handling Measures

Failure of power supply to a board in the cabinet

Do as follows: 1. Remove the board, and then check whether the pins of the board slot on the backplane are distorted, broken, or missing. Replace the subrack if necessary. 2. Insert the board into the subrack, and check the LED on the board. 3. If the status of the LED indicates an error, remove the board, insert it into another idle slot that can house the board of the same type, and then check the LED on the board.

Failure of power supply to any other component in the cabinet

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 that the board is faulty. In this case, replace the board.

Use a multimeter to measure the input voltage of the faulty component. l

If the input voltage is within the range of -38.4 V DC to -57 V DC, replace the component.

l

If the input voltage is out of the range of -38.4 V DC to -57 V DC, check the connections of the power cables for the component. –

If the power cables are not securely connected, set all the power switches on the DCDU-01 to OFF, and then reconnect the power cables.

–

If the power cables are securely connected, replace the DCDU-01 because the power switches on the DCDU-01 might be faulty, or replace the power cables.

.

----End

4.2 Powering Off the BTS3900 You can power off the BTS3900 by using two methods: normal power-off and emergency poweroff. You need to perform the normal power-off before an equipment swap or a foreseeable regional blackout. You need to perform the emergency power-off when a fire, smoke, or water immersion occurs in the equipment room. Issue 04 (2010-01-20)

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4 Powering On/Off the BTS3900

Procedure l

l

Perform the normal power-off. 1.

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

2.

Set all the DC power switches on the DCDU to OFF.

3.

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

Perform the emergency power-off.

CAUTION Emergency power-off may lead to damage on the equipment or boards. Therefore, this type of power-off is not recommended in a normal situation. 1.

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

2.

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

----End

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5 Replacing BTS3900 Components

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Replacing BTS3900 Components

About This Chapter Faulty BTS3900 components must be replaced in time. The replaceable components are the BBU3900 case, boards and module in the BBU3900, RFUs, DCDU-01, FAN unit, power subrack and PMU, PSUs, . 5.1 Replacing BBU3900 Parts During the BBU3900 maintenance, the following parts of the BBU3900 can be replaced as required: the BBU3900 case, BBU3900 boards and module for WCDMA, BBU3900 boards and module for GSM, and optical modules. 5.2 Replacing the RFU RFU is radio frequency unit. The replacement of the RFU disrupts the services carried on it. 5.3 Replacing a DCDU-01 Module The DCDU-01, installed under the BBU, supplies DC power for the cabinet. Replacing the DCDU-01 disrupts the services carried on the corresponding cabinet. 5.4 Replacing the Fan Box The fan box works with the air inlet box in the cabinet to form a ventilation path, and provides forced ventilation. Replacing the fan box may result in over-temperature alarms due to interruption of heat dissipation for the cabinet but has no negative effect on services of the base station. It takes about 20 minutes to replace a fan box. 5.5 Replacing the Power Subrack (AC/DC) The power subrack (AC/DC), which is located in the lower part of the BTS3900 cabinet, provides power input and output ports. Replacing the power subrack (AC/DC) disrupts all services carried by the BTS. 5.6 Replacing the PMU The PMU performs the power system management, power distribution detection, and alarm reporting functions. Replacing the PMU does not affect the services. 5.7 Replacing the PSU (AC/DC) When a PSU (AC/DC) has a fault that cannot be rectified in a short period, the PSU needs to be replaced. Replacing the PSU (AC/DC) causes power-off of the BTS cabinet and thus disrupts all services carried by the BTS. 5.8 Replacing the Power Subrack (DC/DC) Issue 04 (2010-01-20)

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The power subrack (DC/DC), which is located in the lower part of the BTS3900 cabinet, provides power input and output ports. Replacing the power subrack (DC/DC) disrupts all services carried by the BTS. 5.9 Replacing the PSU (DC/DC) When a PSU (DC/DC) has a fault that cannot be rectified in a short period, the PSU needs to be replaced. Replacing the PSU (DC/DC) maybe causes power-off of the BTS cabinet and thus disrupts all services carried by the BTS.

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5.1 Replacing BBU3900 Parts During the BBU3900 maintenance, the following parts of the BBU3900 can be replaced as required: the BBU3900 case, BBU3900 boards and module for WCDMA, BBU3900 boards and module for GSM, and optical modules. 5.1.1 Querying Board Information Before replacing a board, you need to query the board information at the remote end to confirm the type of board to be replaced. 5.1.2 Replacing the BBU3900 The BBU3900, which is a core module of the base station, processes baseband signals of the entire BTS system and provides transport interfaces for communication between the BBU3900 and other NEs and modules, namely, RNC/BSC and MRFU/RRU. Replacing a BBU3900 disrupts all the services carried by the base station. 5.1.3 Replacing the GTMU The GSM Transmission & Management Unit for BBU (GTMU) is the basic transmission and control function entity of the BBU. It provides the reference clock, power supply port, maintenance port, and external alarm collection port, and controls and manages the entire base station. 5.1.4 Replacing a WMPT The WCDMA Main Processing and Transmission unit (WMPT) is the main control and transmission board of the BBU. Replacing the WMPT may disrupt all the services carried by the NodeB. 5.1.5 Replacing a WBBP The WCDMA Baseband Process Unit (WBBP) is used to process baseband signals. Replacing a WBBP disrupts all the services carried on the WBBP. 5.1.6 Replacing the FAN Unit The FAN unit is located in the BBU. The unit and the air inlet box form a ventilation loop, which ensures ventilation and heat dissipation. Replacing the FAN unit may lead to overtemperature alarms due to interruption of heat dissipation in the BBU. The services, however, are not affected. 5.1.7 Replacing the UPEU The Universal Power and Environment Interface Unit (UPEU) in the BBU provides -48 V DC or +24 V DC input power to the boards in the BBU. 5.1.8 Replacing the UEIU The Universal Environment Interface Unit (UEIU) provides channels for transmitting the monitoring signals from the service board to the BBU. 5.1.9 Replacing the USCU The Universal Satellite card and Clock Unit (USCU) in the BBU receives clock signals such as the GPS, RGPS, BITS, and M-1PPS signals. In addition, it transmits or receives 1PPS+TOD clock signals. 5.1.10 Replacing a UTRP The Universal Transmission Processing unit (UTRP) is the BBU transmission extension board. Replacing the UTRP may disrupt all the services carried on the base station. 5.1.11 Replacing the UBRI

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This describes how to replace the Universal BaseBand Radio Interface Board (UBRI). Replacing the UBRI disrupts all the services carried on the board. 5.1.12 Replacing the Optical Module The optical module implements optical-electrical conversion, thus enabling optical transmission between the BBU and other devices. You need to remove the optical cable before replacing the optical module. Replacing the optical cable disrupts the transmission of RI signals.

5.1.1 Querying Board Information Before replacing a board, you need to query the board information at the remote end to confirm the type of board to be replaced. 1.

Run the DSP BTSELABEL command on the LMT to query the information of the board that is configured on the GSM side or run the LST BRDINFO command on the LMT to query the information of the board that is configured on the UMTS side.

2.

Confirm the type of the board to be replaced according to the Boadtype and Description fields in the query result. Ensure that the new board is of the same type by checking the information indicated by the bar code on the label of the or handle of the new board. Figure 5-1 shows a label containing the bar code. Figure 5-1 A label containing the bar code

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

Prerequisite l

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

l

The installation positions of the faulty BBU3900 and the interconnection relations of the cables on the BBU3900 s are recorded.

l

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

Procedure Step 1 Power off the BBU3900 by referring to Powering Off the BBU3900, and turn off the power switch of the external power supply to the BBU3900. 5-4

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Step 2 Label the BBU3900 cables, disconnect them, and then take insulation measures for the cables. Step 3 Use the Phillips screwdriver to remove the four screws. Step 4 Pull the faulty BBU3900 out of the cabinet. Step 5 Insert a new BBU3900 into the slot. Then, push the new BBU3900 until it is in position. Step 6 Tighten the screws to secure the new BBU3900. Step 7 Connect the cables to the ports on the new BBU3900 based on the labels. Step 8 Turn on the power switch of the external power supply to the BBU3900. Then, power on the BBU3900 by referring to Powering on the BBU3900. Step 9 Check the software and BootROM version on the NodeB LMT. Check the software on the BTS LMT. Step 10 Use the reset command to reset the NodeB and BTS on both the NodeB LMT and the BTS LMT. ----End

Postrequisite After replacing the faulty BBU3900, check the following items: l

The related alarms on the LMT or M2000 are cleared.

l

A UE can access the cell carried by the BBU3900.

the local Huawei office to dispose of the faulty BBU3900.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

l

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

l

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

Context

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Figure 5-2 Position of the GTMU GTMU

RI0

TX0

RX0

TX1

1

RX1 TX2

2

RI2

RX2

TX3

3

RX3 TX4

4

RI4

RX4

TX5

5

RX5 LIU0 LIU2 LIU1 LIU3

RI1

ETH

TX

FE0

RX

FE1

RI3

RI5 RUN ALM ACT

USB TST

E1/T1

RST

GTMU

l

The board is hot-swappable.

l

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

Procedure Step 1 Instruct the M2000 to perform the following preparations for the replacement of the GTMU: 1.

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

2.

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

Step 2 If the base station is base on the static IP transmission, query the IP address and route information of the base station on the BSC. Otherwise, go to Step 3. Step 3 Wear an ESD wrist strap or a pair of ESD gloves.

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. Step 4 Record all the cable connections on the of the board to be replaced. Step 5 Disconnect the transmission cable and RI cable from the GTMU. If a surge protection board is configured, the surge protection transfer cable also needs to be disconnected, as shown in Figure 5-3. Figure 5-3 Disconnecting cables

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

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Figure 5-4 Removing the GTMU

1

2

Step 7 Set the DIP switch on the new board according to the settings of the DIP switch on the faulty board. If required, query the information about the DIP switch by referring to GTMU. Step 8 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 9 Check whether the new board is functional according to the status of the LEDs on the board. For details about the status of the LEDs, see GTMU. Step 10 If the base station is based on the static IP transmission, perform the following operations: 1.

Connect the PC installed with the SMT application to the ETH port on the GTMU, as shown in Figure 5-5. Figure 5-5 Connecting the GTMU

2.

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

3.

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

Step 11 Inform the M2000 that the replacement is complete, and then instruct the to perform the following operations: 1.

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

2.

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

3.

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

4.

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

5.

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

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

Postrequisite l

Place the replaced component into the ESD box or bag. Then, place the ESD box or 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

the local Huawei office to handle the faulty component.

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

Prerequisite l

The status of the LEDs on the faulty WMPT and cable connections on the are recorded.

l

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

l

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

l

Obtain the board operation log.

l

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

l

The WMPT is hot swappable.

l

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

l

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

Context

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

Procedure Step 1 On the NodeB LMT, run the ULD CFGFILE command to the NodeB data configuration file to the LMT computer. 5-8

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Step 2 Remove the faulty WMPT. 1.

Attach temporary labels to the cables on the faulty WMPT, and then disconnect the cables.

2.

Loosen the screws on the of the faulty WMPT.

3.

Turn the ejector lever outwards, and then pull the faulty WMPT out of the slot.

4.

Place the faulty WMPT in an ESD bag.

Step 3 Install a new WMPT. 1.

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

2.

Turn the ejector lever inwards, and then tighten the screws on the of the new WMPT.

3.

Connect the cables to the ports on the of the new WMPT according to the recorded cable connections.

Step 4 Run the DLD CFGFILE command to the backup data configuration files on the NodeB LMT to the new BBU. Step 5 Check the running status of the new WMPT. NOTE

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

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

Postrequisite l

Record the bar code of the replaced board.

l

the local Huawei office to handle the faulty WMPT.

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

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 The WBBP is hot swappable.

Procedure Step 1 On the LMT, run the BLK BRD command to block the faulty WBBP. Step 2 Remove the faulty WBBP. 1.

Attach temporary labels to the cables on the faulty WBBP, and then disconnect the cables.

2.

Loosen the screws on the of the faulty WBBP.

3.

Turn the ejector lever outwards, and then pull the faulty WBBP out of the slot.

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4.

Place the faulty WBBP in an ESD bag.

Step 3 Install a new WBBP. 1.

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

2.

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

3.

Connect the cables to the ports on the of the new WBBP according to the recorded cable connections.

Step 4 Check the running status of the new WBBP. NOTE

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

Step 5 Check whether related alarms are reported. 1.

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

2.

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

Step 6 Activate the BootROM or software version of the new WBBP. 1.

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

2.

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

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

Postrequisite l

Record the bar code of the replaced board.

l

the local Huawei office to handle the faulty WBBP.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

l

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

Context

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Figure 5-6 Position of the FAN unit

FAN

l

The unit is hot-swappable.

l

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

Procedure Step 1 Wear an ESD wrist strap or a pair of ESD gloves.

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. Step 2 Loosen the two M3 screws on the , and then remove the FAN unit, as shown in Figure 5-7. Figure 5-7 Removing the FAN unit

1

2

CAUTION Do not touch the rotating fans to prevent damage to your hands when removing the FAN unit. Step 3 Install the new unit, tighten the screws on the unit until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 4 Check whether the new unit is functional according to the status of the LEDs on the unit. For details about the status of the LEDs, see FAN. Issue 04 (2010-01-20)

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Step 5 Inform the M2000 that the replacement is complete, and then instruct the to perform the following operations: 1.

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

2.

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

Step 6 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End

Postrequisite l

Place the replaced component into the ESD box or bag. Then, place the ESD box or 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

the local Huawei office to handle the faulty component.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

l

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

Context

Figure 5-8 Position of the UPEU

UPEU

l

Replacing the UPEU disrupts the power supply to the BBU, and the services are also disrupted. Therefore, the UPEU should be replaced within 10 minutes.

Procedure Step 1 Instruct the M2000 to perform the following operations for the replacement of the UPEU: 5-12

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1.

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

2.

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

CAUTION Replacing the UPEU disrupts all the services carried by the base station if no standby UPEU is configured. Step 2 Wear an ESD wrist strap or a pair of ESD gloves.

WARNING 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. Step 3 Record all the cable connections on the of the board to be replaced. Step 4 Disconnect the monitoring cable and alarm cable on the UPEU. as shown in Figure 5-9. Figure 5-9 Disconnecting cables

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

1

2

Step 6 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 7 Check whether the new board is functional according to the status of the LEDs on the board. For details about the status of the LEDs, see UPEU. Issue 04 (2010-01-20)

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Step 8 Inform the M2000 that the replacement is complete, and then instruct the to perform the following operations: 1.

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

4.

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

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

Postrequisite l

Place the replaced component into the ESD box or bag. Then, place the ESD box or 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 board.

l

the local Huawei office to handle the faulty board.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

l

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

Context

Figure 5-11 Position of the UEIU UEIU

5-14

l

The board is hot-swappable.

l

Replacing the UEIU disrupts the monitoring of the external equipment. Therefore, the UEIU should be replaced within five minutes. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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Procedure Step 1 Wear an ESD wrist strap or a pair of ESD gloves.

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. Step 2 Record all the cable connections on the of the board to be replaced. Step 3 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-12. Figure 5-12 Disconnecting cables

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

1 2

Step 5 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 6 Inform the M2000 that the replacement is complete, and then instruct the to perform the following operations: 1.

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

2.

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

Step 7 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End

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Postrequisite l

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

the local Huawei office to handle the faulty component.

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

Prerequisite l

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

l

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

l

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

l

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

Context

Figure 5-14 Position of the USCU USCU

RX+ RX- TX+ TX- 1S+ 1S- GND PWR

RGPS

l

GREEN IN

GPS

YELLOW OUT

USCU

TOD0

M-1PPS

BITS

RUN ALM ACT

TOD1

The board is hot-swappable.

Procedure Step 1 Wear an ESD wrist strap or a pair of ESD gloves.

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. Step 2 Record all the cable connections on the of the board to be replaced. Step 3 Disconnect the transmission cable and RI cable from the USCU. If a surge protection board is configured, the surge protection transfer cable also needs to be disconnected, as shown in Figure 5-15. 5-16

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Figure 5-15 Disconnecting cables

Step 4 Loosen the two M3 screws on the , and then remove the USCU, as shown in Figure 5-16. Figure 5-16 Removing the USCU

2 1

Step 5 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 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 that the replacement is complete, and then instruct the to perform the following operations: 1.

Load and activate the software version of the USCU. For details, see the LMT Guide.

2.

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

3.

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

Step 8 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End

Postrequisite l

Place the replaced component into the ESD box or bag. Then, place the ESD box or 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

the local Huawei office to handle the faulty component.

5.1.10 Replacing a UTRP The Universal Transmission Processing unit (UTRP) is the BBU transmission extension board. Replacing the UTRP may disrupt all the services carried on the base station. Issue 04 (2010-01-20)

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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 services carried on the base station.

l

The BBU is configured with one active UTRP and one standby UTRP. When the active UTRP is being replaced, an active/standby switchover is performed automatically. After the switchover is successful, the standby UTRP becomes the active UTRP and takes over the services, and the new UTRP becomes the standby UTRP. Powering off the eNodeB is not 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 the faulty board, and then insert a new board into the original slot.

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

Procedure Step 1 Remove the faulty UTRP. 1.

Attach temporary labels to the cables on the faulty UTRP, and then disconnect the cables.

2.

Loosen the screws on the 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 of the new UTRP.

3.

Connect the cables to the ports on the of the new UTRP according to the recorded cable connections.

Step 3 Check the running status of the new UTRP. NOTE

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

----End

Postrequisite

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l

Record the bar code of the replaced board.

l

the local Huawei office to handle the faulty UTRP. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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

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

Context The UBRI is hot-swappable. It takes about 10 minutes to replace the UBRI, which involves disconnecting the cables, removing the faulty board, installing the new board, reconnecting the cables, and waiting for the services to resume.

Procedure Step 1 Attach temporary labels to the cables, and then disconnect the cables. Step 2 Loosen the screws on the faulty board. Step 3 Pull the RFU handle, and remove the faulty board from the slot. Step 4 Put the faulty board into the ESD bag. Step 5 Unpack the new UBRI, place it into the slot where the faulty board is installed, and then slide it into the slot. Step 6 Push the RFU handle, and tighten the screws on the new board. Step 7 Connect the cables according to the temporary labels. Step 8 Check whether the board is running properly according to the status of the LEDs on the board. NOTE

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

----End

Postrequisite l

Record the bar code of the replaced board.

l

the local Huawei office to handle the faulty board.

5.1.12 Replacing the Optical Module The optical module implements optical-electrical conversion, thus enabling optical transmission between the BBU and other devices. You need to remove the optical cable before replacing the optical module. Replacing the optical cable disrupts the transmission of RI signals.

Prerequisite l

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All the types of optical module are ready.

l

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

l

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

Context

Figure 5-17 Position of the optical module

1

(1) Optical module

l

The optical module is hot-swappable.

Procedure Step 1 Wear an ESD wrist strap or a pair of ESD gloves.

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. Step 2 Choose the optical module of the same type as the faulty optical module according to the label on 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 faulty optical module, as shown in Figure 5-18.

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Figure 5-18 Disconnecting cables

WARNING Do not look into the optical module without eye protection after the optical cable is removed from the optical module.

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

Step 6 Install the new optical module onto the BBU. Issue 04 (2010-01-20)

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Step 7 Remove the dustproof caps from the new optical module and optical connector, and then insert the optical cable connector into the new optical module. Step 8 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End

Postrequisite l

Place the replaced component into the ESD box or bag. Then, place the ESD box or 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

the local Huawei office to handle the faulty component.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

Context It takes about 10 minutes to replace the RFU. NOTE

l

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

l

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

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

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

Step 2 Set the corresponding DC output power switch on the of the DCDU-01 to OFF. Step 3 Record the connections of the cables on the RFU, and then disconnect the cables. Step 4 Use a Phillips screwdriver to loosen the screws at the four corners of the RFU and pull the RFU module outwards by 50 to 100 mm by using the handle key, as shown in Figure 5-20. Hold the RFU module with one hand and pull the module out of the cabinet with the other hand. 5-22

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Figure 5-20 Removing an RFU

NOTE

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

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

Step 5 Put the removed RFU into an ESD box. Step 6 Unpack the new RFU, place the new RFU on the corresponding guide rails, and then slide it along the rails until it is in position. Step 7 Tighten the four captive screws at four corners on the of the RFU to fasten the RFU securely to the subrack. Step 8 Fix the 7/16-inch DIN male elbow connector of the RF jumper RFU according to the temporary label. Then, use a torque wrench to fasten the DIN male elbow connector with the fastening torque of 25 N·m to 35 N·m. Step 9 Insert the connector to the RFU according to the temporary label on the RI cable. Step 10 Install the power cable of the RFU, and then tighten the screws. Step 11 Set the corresponding DC output power switch on the of the DCDU-01 to ON. Step 12 Activate the BootROM or software version of the RFU. 1.

Run the DSP BRDVER command on the LMT to query the BootROM and software versions of the new RFU.

2.

If the software version is incorrect, run the ACT SOFTWARE command on the LMT to reactivate the BootROM or software version of the new RFU.

Step 13 Run the UBL BRD command on the LMT to unblock the RFU. Whether to perform this step locally or remotely depends on the way used in step 1 at the beginning of this procedure. That is, perform this step locally if step 1 is performed locally. ----End 5-24

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Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

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

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 by referring to Powering Off the BTS3900. Step 2 Mark the cables connected to the output ports on the DCDU-01, and then disconnect them. Step 3 Use the Phillips screwdriver to remove the protection cover from the external power input wiring terminal block of the DCDU-01, as shown in Figure 5-22.

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Figure 5-22 Removing the protection cover

(1) Protection cover

(2) Screw

(3) External input power cable

Step 4 Mark the external input power cable for the DCDU-01, and then disconnect the cable. Step 5 Remove the four M6x12 strews on the two mounting ears of the DCDU-01, as shown in Figure 5-23. Figure 5-23 Removing the screws on the two mounting ears of the module

Step 6 Remove the DCDU-01 module by pulling out the DCDU-01 with one hand, and holding the DCDU-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 the four 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 5-26

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(-), and then connect the OT terminal of the GND cable (black) to the terminal labeled RTN (+). Step 10 Place the protection cover on the DCDU-01, and then tighten the screws by using the Phillips screwdriver. Step 11 Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01 . Step 12 Connect the removed cables to the power output ports on the DCDU-01 according to the marks. Step 13 Power on the BTS3900 by referring to Powering On the BTS3900. ----End

Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

The authorized personnel are permitted to enter the site. The required keys 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 5-24 shows the position of the fan box switch on the DCDU-01. Issue 04 (2010-01-20)

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Figure 5-24 Position of the fan box switch

Step 2 Label the cables on the of the fan box and then remove the cables. Step 3 Loosen the captive screws on both sides of the adjustable cable trough. Then, raise the cable trough and fix it at the upper mounting hole, as shown in Figure 5-25. Figure 5-25 Raising the adjustable cable trough

(1) Upper mounting hole

(2) Captive screw

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

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Figure 5-26 Removing the fan box

Step 5 Pull out the fan box by one-third of its length with one hand, hold the fan box with the other hand, and then pull the entire fan box out of the cabinet. Put the faulty fan box into a ESD box. Step 6 Put into the new fan box. Then, secure the four screws. Step 7 Place the adjustable cable trough to its original position, and then tighten the captive screws on both sides of the adjustable cable trough. Step 8 Install the cables to the of the fan box based on the labels. Step 9 Set the fan box switch on the DCDU-01 to ON. ----End

Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

5.5 Replacing the Power Subrack (AC/DC) The power subrack (AC/DC), which is located in the lower part of the BTS3900 cabinet, provides power input and output ports. Replacing the power subrack (AC/DC) disrupts all services carried by the BTS. Issue 04 (2010-01-20)

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Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

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

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. For details, see 4.2 Powering Off the BTS3900. Step 2 Mark the cables on s of the power subrack (AC/DC) and PMU, and then disconnect them. Step 3 Loosen the screws on the of the PMU or PSU (AC/DC), which is located in the power subrack (AC/DC), as shown in Figure 5-27.

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

(1) Screws on the of the PMU

(2) PMU

(3) Power subrack

NOTE

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

Step 4 Raise the ejector levers on the of the PMU or PSU, and pull out the PMU or PSU along the slide rails, as shown in Figure 5-27. Step 5 Repeat steps Step 3 and Step 4 to remove all PMUs or PSUs from the power subrack (AC/DC), and then place the removed PMUs or PSUs into an ESD box. Step 6 Remove the four M6x12 screws on the two mounting ears of the power subrack (AC/DC), as shown in Figure 5-28.

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Figure 5-28 Removing the screws on the mounting ears

Step 7 Hold the power subrack (AC/DC) with one hand, and pull out the power subrack (AC/DC) with the other hand. Step 8 Place the removed power subrack (AC/DC) into an ESD box. Step 9 Take out the new power subrack (AC/DC), perform the preceding steps in the contrary order to install the new power subrack (AC/DC) in the cabinet, and install all removed PMUs or PSUs into the power subrack (AC/DC). Step 10 Reconnect the cables to the s of the power subrack (AC/DC) and PMU according to the original marks. Step 11 Switch on the external power supply to finish 4.1 Powering On the BTS3900. ----End

Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

5.6 Replacing the PMU The PMU performs the power system management, power distribution detection, and alarm reporting functions. Replacing the PMU does not affect the services. 5-32

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Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

Context This module is hot swappable.

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

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 , to prevent false alarms caused by bent pins. Step 2 Loosen the screws on the handle of the PMU by using a Phillips screwdriver. Step 3 Pull the handle gently to disconnect the PMU from the subrack, and then remove the PMU from the slot, as shown in Figure 5-29. Figure 5-29 Removing the PMU

Step 4 Put the fault PMU into a ESD box. Step 5 Set the DIP switch of the new PMU, as shown in Figure 5-30. Issue 04 (2010-01-20)

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Figure 5-30 Set the DIP switch

Step 6 Loosen the screws on the handle of the PMU. Then, pull the handle outwards. Step 7 Slide the PMU along the guide rails into the slot and then push the handle back. Step 8 Tighten the screws on the handle. Figure 5-31 shows the installation procedure of the PMU. Figure 5-31 Installation procedure of the PMU

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

Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

5.7 Replacing the PSU (AC/DC) When a PSU (AC/DC) has a fault that cannot be rectified in a short period, the PSU needs to be replaced. Replacing the PSU (AC/DC) causes power-off of the BTS cabinet and thus disrupts all services carried by the BTS. 5-34

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Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

Context The module is hot-swappable.

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 modules.

Procedure Step 1 Use a screwdriver to loosen the screws on the ejector levers of the of the PSU (AC/DC). Step 2 Raise the ejector levers and remove the PSU (AC/DC) from the subrack, as shown in Figure 5-32. Figure 5-32 Removing the PSU (AC/DC)

Step 3 Place the removed PSU (AC/DC) into an ESD box. Step 4 Use a screwdriver to loosen the screws on the ejector levers of the PSU (AC/DC) and raise the ejector levers. Step 5 Slide the PSU (AC/DC) into the subrack and lower the ejector levers. Step 6 Tighten the screws on the ejector levers. Figure 5-33 shows the entire installation process. Figure 5-33 Installing the PSU (AC/DC)

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----End

Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

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

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 by referring to Powering Off the BTS3900. Step 2 Mark the cables on s of the power subrack (DC/DC), and then disconnect them. Step 3 Loosen the screws on the of the PSU, which is located in the power subrack (DC/DC), raise the ejector levers on the of the PSU, and pull out the PSU along the slide rails, as shown in Figure 5-34.

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

Step 4 Repeat step Step 3, remove all PSUs from the power subrack (DC/DC), and place the removed PSUs into an ESD box. Step 5 Remove the four M6x12 screws on the two mounting ears of the power subrack (DC/DC), as shown in Figure 5-35. Figure 5-35 Removing the screws on the mounting ears

Step 6 Hold the power subrack (DC/DC) with one hand, and pull out the power subrack (DC/DC) with the other hand. Step 7 Place the removed power subrack (DC/DC) into an ESD box. Step 8 Take out the new power subrack (DC/DC), perform the preceding steps in the contrary order to install the new power subrack (DC/DC) in the cabinet, and install all removed PSUs into the power subrack (DC/DC). Step 9 Reconnect the cables to the of the power subrack (DC/DC) according to the original marks. Step 10 Power on the BTS3900 by referring to Powering On the BTS3900. ----End

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Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

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

Prerequisite l

The tools and materials, such as an ESD wrist strap or ESD gloves and M3 screwdriver, are ready.

l

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

l

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

Context The module is hot-swappable.

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 modules.

Procedure Step 1 Use a screwdriver to loosen the screws on the ejector levers of the of the PSU (DC/DC). Step 2 Raise the ejector levers and remove the PSU (DC/DC) from the subrack, as shown in Figure 5-36. Figure 5-36 Removing the PSU (DC/DC)

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Step 3 Place the removed PSU (DC/DC) into an ESD box. Step 4 Use a screwdriver to loosen the screws on the ejector levers of the PSU (DC/DC) and raise the ejector levers. Step 5 Slide the PSU (AC/DC) into the subrack and lower the ejector levers. Step 6 Tighten the screws on the ejector levers. Figure 5-37 shows the entire installation process. Figure 5-37 Installing the PSU (DC/DC)

----End

Postrequisite 1.

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

2.

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

3.

the local Huawei office to handle the faulty board.

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