BTS3900 (Ver.B) Site Maintenance Guide(07)(PDF)-En

BTS3900 (Ver.B)

Site Maintenance Guide Issue

07

Date

2011-08-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

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Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

i

BTS3900 (Ver.B) Site Maintenance Guide

About This Document

About This Document Purpose This document describes the routine hardware maintenance items of the BTS3900 (Ver.B) (hereinafter referred to as 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 (Ver.B) WCDMA

V200R013

BTS3900 (Ver.B) LTE

V100R004

BTS3900 (Ver.B) GSM

V100R013

BTS3900 (Ver.B)

V100R004

Intended Audience This document is intended for: l

System engineers

l

Site maintenance engineers

Organization 1 Changes in the BTS3900 (Ver.B) Site Maintenance Guide This describes the changes in the BTS3900 (Ver.B) Site Maintenance Guide. 2 Preparations for Base Station Site Maintenance Issue 07 (2011-08-30)


ii


About This Document

This section describes the preparation strategy for base station 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 This chapter describes the routine maintenance for the hardware in the cabinet. The hardware items for routine maintenance are 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 chapter describes how to power on or off the BTS3900 during the maintenance. 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, boards and module in the BBU3900, RFUs, DCDU-01, FAN unit, power subrack, PMU, and 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.

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Convention

Description

Times New Roman

Normal paragraphs are in Times New Roman.


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About This Document

Convention

Description

Boldface

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

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. Issue 07 (2011-08-30)


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About This Document

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.

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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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Contents

Contents About This Document.....................................................................................................................ii 1 Changes in the BTS3900 (Ver.B) Site Maintenance Guide....................................................1 2 Preparations for Base Station Site Maintenance.....................................................................5 3 Hardware Items of BTS3900 Routine Maintenance................................................................7 3.1 Maintenance Items of the Equipment Room Environment................................................................................8 3.2 Power Supply and Grounding System Maintenance Items................................................................................9 3.3 Maintenance Items of the Main Components.....................................................................................................9

4 Powering On/Off the BTS3900..................................................................................................11 4.1 Powering On the BTS3900...............................................................................................................................12 4.2 Powering Off the BTS3900..............................................................................................................................15

5 Replacing BTS3900 Components..............................................................................................17 5.1 Replacing BBU3900 Parts................................................................................................................................19 5.1.1 Query Electronic Label of the Board.......................................................................................................19 5.1.2 Replacing the BBU3900 Case.................................................................................................................19 5.1.3 Replacing the GTMU..............................................................................................................................22 5.1.4 Replacing the WMPT..............................................................................................................................25 5.1.5 Replacing the LMPT...............................................................................................................................27 5.1.6 Replacing the WBBP...............................................................................................................................29 5.1.7 Replacing the LBBP................................................................................................................................31 5.1.8 Replacing the FAN Unit..........................................................................................................................33 5.1.9 Replacing the UPEU................................................................................................................................35 5.1.10 Replacing the UEIU...............................................................................................................................38 5.1.11 Replacing the USCU.............................................................................................................................40 5.1.12 Replacing the UTRP..............................................................................................................................42 5.1.13 Replacing the UBRI...............................................................................................................................44 5.1.14 Replacing the Optical Module...............................................................................................................47 5.2 Adding Components in the BBU3900..............................................................................................................49 5.2.1 Adding a UPEU.......................................................................................................................................49 5.2.2 Adding a WBBP......................................................................................................................................59 5.3 Replacing an RFU............................................................................................................................................60 5.4 Replacing a DCDU-01......................................................................................................................................66 Issue 07 (2011-08-30)


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Contents

5.5 Replacing the Fan Box.....................................................................................................................................68 5.6 Replacing the Power Subrack (AC/DC)...........................................................................................................71 5.7 Replacing the PMU..........................................................................................................................................74 5.8 Replacing the PSU (AC/DC)............................................................................................................................76 5.9 Replacing the Power Subrack (DC/DC)...........................................................................................................77 5.10 Replacing the PSU (DC/DC)..........................................................................................................................79

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1

1 Changes in the BTS3900 (Ver.B) Site Maintenance Guide

Changes in the BTS3900 (Ver.B) Site Maintenance Guide

This describes the changes in the BTS3900 (Ver.B) Site Maintenance Guide.

07 (2011-08-30) This is the seventh official release. Compared with the 06 (2011-08-05), no content is added. Compared with the 06 (2011-08-05), this issue incorporates the following changes: Contents

Change Description

About This Document

Added Ver.B to the cabinet version in the document name.

Compared with the 06 (2011-08-05), no content is deleted.

06 (2011-08-05) This is the sixth official release. Compared with the 05 (2011-07-08), no content is added. Compared with the 05 (2011-07-08), this issue incorporates the following changes: Contents

Change Description

5.1.3 Replacing the GTMU

The influence of replacing the GTMU is added.

All the chapters of replacing BBU3900 boards.

The chapter names of the reference documents in replacing steps are added.

Compared with the 05 (2011-07-08), no content is deleted. Issue 07 (2011-08-30)


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05 (2011-07-08) This is the fifth official release. Compared with the 04 (2011-06-10), no content is added. Compared with the 04 (2011-06-10), this issue incorporates the following changes: Contents

Change Description

5.3 Replacing an RFU

Optimized the information in this document.


04 (2011-06-10) This is the fourth official release. Compared with the 03 (2011-05-25), this issue adds the following change: l

5.2 Adding Components in the BBU3900

Compared with the 03 (2011-05-25), this issue incorporates the following change: Contents

Change Description


The steps of setting the maximum transmit power of the RFU are changed.


03 (2011-05-25) This is the third official release. Compared with the 02 (2011-04-10), no content is added. Compared with the 02 (2011-04-10), this issue incorporates the following changes: Contents

Change Description

5.1.4 Replacing the WMPT

The operations for loading and activating the WMPT software are modified.


The operations of querying and handling the alarms are changed.


02 (2011-04-10) This is the second official release. Issue 07 (2011-08-30)


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Compared with the 01 (2011-03-30), no content is added. Compared with the 01 (2011-03-30), this issue incorporates the following change: Contents

Change Description


The operations performed on the M2000 and LMT are differentiated.


01 (2011-03-30) This is the first official release. Compared with the Draft B (2011-03-10), no content is added. Compared with the Draft B (2011-03-10), this issue incorporates the following changes: Contents

Change Description

5.1 Replacing BBU3900 Parts

l The operation for blocking cells during the WMPT replacement is added. l The operations for loading and activating the WMPT software are modified. l The operations performed on the M2000 and LMT are differentiated.


The methods for identifying GRFUs of V1, V2, V2a or MRFUs of V1, V2, and V2a are added.

Compared with the Draft B (2011-03-10), no content is deleted.

Draft B (2011-03-10) This is the Draft release. Compared with the Draft A (2011-01-30), no content is added. Compared with the Draft A (2011-01-30), this issue incorporates the following change: Contents

Change Description


The operations for setting power locking for the MRFU V2 are added to the procedure for replacing an RFU.

Compared with the Draft A (2011-01-30), no content is deleted. Issue 07 (2011-08-30)


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Draft A (2011-01-30) This is the Draft release. Compared with the WCDMA-NodeB V200R012C00, GSM-BTS V100R012C00, MBTS V100R003C00, no content is added. Compared with the WCDMA-NodeB V200R012C00, GSM-BTS V100R012C00, MBTS V100R003C00, no content is changed. Compared with the WCDMA-NodeB V200R012C00, GSM-BTS V100R012C00, MBTS V100R003C00, no content is deleted.

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2 Preparations for Base Station Site Maintenance

2

Preparations for Base Station Site Maintenance

This section describes the preparation strategy for base station site maintenance. The preparations for site maintenance involve obtaining site information, selecting maintenance items, and arranging maintenance tools and spare parts.

Collecting Site Information Before you maintain the base station site, collect the following information: l

Faults and alarms that are not cleared

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

Equipment room environment of the base station

l

Power supply and grounding system of the base station

l

Main components in the base station

l

Antenna system of the base station

Preparing Maintenance Tools and Spare Parts Prepare 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

Frequency test devices, such as a frequency generator and a spectrum analyzer.

l

Power test devices that 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

l

Antenna and feeder test devices that are used to test the Voltage Standing Wave Ratio (VSWR), return loss, and cable insertion loss for fault location. The commonly used antenna and feeder test device is the SiteMaster.

l

Other devices – Multimeter – Diagnosis tools and robustness test devices – Local Maintenance Terminal (LMT) – Rubidium clock (used to locate the clock of the base station) NOTE

Addition tools and new parts may be required when more faulty parts are found during the maintenance.

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3

3 Hardware Items of BTS3900 Routine Maintenance

Hardware Items of BTS3900 Routine Maintenance

About This Chapter This chapter describes the routine maintenance for the hardware in the cabinet. The hardware items for routine maintenance are 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 section describes the maintenance items, maintenance intervals, operation instructions, and reference standards for the equipment room environment. 3.2 Power Supply and Grounding System Maintenance Items This section 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 Items of the Main Components This section describes the maintenance items, maintenance intervals, operation instructions, and reference standards for the main components in the cabinet.

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

Interval

Operation Instruction

Reference Standard

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.

Temperature in the equipment room

Weekly

Record the temperature shown on the thermometer in the equipment room.

The normal temperature ranges from -20°C to +55° C.

Humidity in the equipment room

Weekly

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

The normal humidity ranges from 5% RH to 95% RH.

Illumination in the equipment room

Every two months

Check whether the routine and emergency illumination in the equipment room is normal.

-

Air conditioner

Every two months

Check whether the air conditioner is working normally.

-

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.

Equipment room cleanliness

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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.

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3.2 Power Supply and Grounding System Maintenance Items This section 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 Item

Interval


Reference Standard

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.

Voltage

Monthly

Measure the voltage of the power supply using a multimeter.

The voltage is within normal range.

PGND cables

Monthly

Check whether the PGND cable and ground bar are connected properly.

The connections of the PGND cable are secure. The cable is not aging. The connection points are sound with no corrosion on them.

Checking Earth resistance

Monthly

Measure the earth resistance using an electric earth resistance tester and keep a record.

The grounding resistance of the cabinet is smaller than 10 ohms.

Batteries

Annually

Check the batteries and rectifiers.

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

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

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

Interval


Reference Standard

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.

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.

Air filter

Quarterly

Replace the air filter if too much dust is coated.

-

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.

Lock and door of the cabinet

Quarterly

Check whether the lock is normal and the door can be opened and closed easily.

-

Cabinet cleanliness

Quarterly

Check whether the cabinet is clean.

The cabinet surface is clean. The subracks are not dusty.

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 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. Fan box

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Annually

Clean the fan box if too much dust is coated on its surface or inside the fan box.


l If you are using a multimeter, the earth resistance is between 0.75 MΩ and 10 MΩ. -

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4 Powering On/Off the BTS3900

4

Powering On/Off the BTS3900

About This Chapter This chapter describes how to power on or off the BTS3900 during the maintenance. 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 section 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 two methods: normal power-off and emergency power-off. 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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4.1 Powering On the BTS3900 This section 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 panel of the DCDU-01. Figure 4-1 Panel of the DCDU-01

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

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Power Switch

Module

SPARE2

Reserved

SPARE1

Reserved

BBU

BBU

FAN

FAN unit

RFU5

RFU in slot 5

RFU4

RFU in slot 4

RFU3

RFU in slot 3

RFU2

RFU in slot 2 Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

12



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 blinks green rapidly (on for 0.125s and off for 0.125s) or slowly (on for 1s and off for 1s).

WMPT



13



Component

Indication of Normal Power Supply

LMPT


WBBP


LBBP


FAN

The STATE LED blinks green (on for 1s and off for 1s).

UPEU

The RUN LED is steady green.

UBRI

The RUN LED blinks green slowly (on for 1s and off for 1s).

Fan Box

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

RFU

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

PMU


PSU(AC/DC)

The 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 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 circuit breakers 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. 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.

Failure of power supply to any other component in the cabinet

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 circuit breakers 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 two methods: normal power-off and emergency power-off. You need to perform the normal power-off before an equipment swap or a foreseeable regional

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blackout. You need to perform the emergency power-off when a fire, smoke, or water immersion occurs in the equipment room.

Procedure l

Perform the normal power-off. 1.

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

Although the RFU can be blocked either remotely or locally, you are advised to block the RFU remotely. If the RF module works in dual mode, you need to block the RFU in both modes. Note that you cannot block an RF module working in GSM mode but can only block the carriers of the RF module.

l

2.

Set all the circuit breakers on the DCDU-01 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 cause damage to 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

5

Replacing BTS3900 Components

About This Chapter Faulty BTS3900 components must be replaced in time. The replaceable components are the BBU3900, boards and module in the BBU3900, RFUs, DCDU-01, FAN unit, power subrack, PMU, and 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, and optical modules. 5.2 Adding Components in the BBU3900 During the maintenance of the baseband unit (BBU), some boards may be added, such as a universal power and environment interface unit (UPEU) or a WCDMA Baseband Process Unit (WBBP). 5.3 Replacing an RFU Replacing a radio frequency unit (RFU) interrupts the services carried on the RFU. 5.4 Replacing a DCDU-01 The DCDU-01, installed under the BBU3900, supplies DC power for the cabinet. 5.5 Replacing the Fan Box The fan box works with the air inlet box in the cabinet to form a ventilation loop, and provides forced ventilation. 5.6 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. 5.7 Replacing the PMU The PMU performs the power system management, power distribution detection, and alarm reporting functions. 5.8 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. 5.9 Replacing the Power Subrack (DC/DC) Issue 07 (2011-08-30)


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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. 5.10 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.

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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, and optical modules. NOTE

If two main control boards need to be replaced in a dual-mode base station, you must replace one main control board and wait for the board to resume services before replacing the other main control board.

5.1.1 Query Electronic Label of the Board Before replacing a board, you need to query the electronic label of the board 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 or run the DSP BRDMFRINFO command on the LMT to query the information of the board that is configured on the LTE side.

2.

Confirm the type of board to be replaced according to the Boardtype and Description fields in the queried 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 panel or handle of the new board. Figure 5-1 shows a label containing the bar code. Figure 5-1 A label containing the bar code

5.1.2 Replacing the BBU3900 Case The BBU3900 is the core of a base station. The BBU3900 processes the baseband signals of the entire base station and communicates with the RNC/BSC and MRFU/RRU. Replacing a BBU3900 interrupts all the services carried by the base station.

Prerequisite l

Tools and materials, such as an ESD wrist strap or ESD gloves and M6 screwdrivers, are ready.

l

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

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l

If a static IP-based GSM base station is used, a PC equipped with an Ethernet cable and the short message terminal (SMT) application is available. For details about the hardware requirements of the PC, see the GSM SMT User Guide.

l

Associated personnel have been permitted to access the site and obtained required keys.

Procedure Step 1 Instruct the M2000 administrator to perform the following operations for the replacement of the BBU case: 1.

On the NodeB, run the BLK LOCELL command to block all the cells of the NodeB. Modify the ESN on the RNC by referring to the new BBU case. For details, see Creating NodeB Commissioning Tasks.

2.

On the eNodeB, run the BLK CELL command to block all the cells of the eNodeB. Modify the ESN in the DHCP management interface by referring to the new BBU case. For details, see Creating eNodeB Commissioning Tasks.

3.

On the BSC, run the LST GCELL command to query the configuration of all cells of the BTS, and run the SET GCELLADMSTAT command to block these cells. Modify the ESN on the BSC by referring to the new BBU case. For details, see Creating GBTS Commissioning Tasks. NOTE

In a multi-mode base station, the cells of each mode must be blocked respectively.

Step 2 Power off the BBU. For details, see Powering Off the BBU. Step 3 Wear an ESD wrist strap or ESD gloves.

WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 4 Record all the cable connections on the panels of the boards in the BBU case to be replaced. Step 5 Disconnect the power cables, transmission cables, CPRI cables, and alarm cables from the panels of the boards in the BBU case. Step 6 Loosen the four M6 screws on the BBU case, and remove the BBU case, as shown in Figure 5-2. Figure 5-2 Removing the BBU case

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Step 7 Remove all the boards in the faulty BBU case, install them in the corresponding slots of the new BBU case, and install filler panels in the vacant slots. Step 8 Install the new BBU case, tighten the screws on the BBU case to 2 N·m, and reconnect the cables. Step 9 Power on the BBU. For details, see Powering On the BBU. Step 10 Check the status of the new BBU case by observing the status of indicators on the boards in the BBU. For details about the status of the indicators, see the related hardware description. Step 11 If a static IP-based GSM base station is used, perform the following operations: 1.

Connect the PC providing the SMT application to the ETH port on the GTMU, as shown in Figure 5-3. Figure 5-3 Connecting the GTMU

2.

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

3.

Disconnect the PC providing the SMT application from the GTMU.

Step 12 Perform the following operations on the local maintenance terminal (LMT): NOTE

Alarms of a GSM+UMTS (GU), GSM+LTE (GL), UMTS+LTE (UL), or GSM+UMTS+LTE (GUL) base station can be checked and cleared on the LMT of the corresponding standard, that is, the BSC LMT, NodeB LMT, or eNodeB LMT. For example, alarms of a GU base station are checked and cleared on the BSC LMT or NodeB LMT.

1.

On the UMTS side, check whether any alarm is reported on the NodeB LMT. For details, see Browsing Alarms. If an alarm is reported, clear the alarm by referring to Querying Alarm Handling Suggestions.

2.

On the GSM side, check whether any alarm is reported on the BSC LMT. For details, see Browsing Alarm/Event. If an alarm is reported, clear the alarm by referring to Querying Alarm/Event Handling Suggestions.

3.

On the LTE side, check whether any alarm is reported on the eNodeB LMT. For details, see Browsing Active Alarms or Events. If an alarm is reported, clear the alarm by referring to Querying Alarm or Event Handling Suggestions.

Step 13 Perform the following operations on the M2000: 1.

On the NodeB, run the UBL LOCELL command to unblock all cells working in UMTS mode.

2.

On the eNodeB, run the UBL CELL command to unblock all cells working in LTE mode.

3.

On the BSC, run the SET GCELLADMSTAT command to unblock all cells working in GSM mode.

4.

Synchronize the inventory information manually. For details, see Synchronizing Inventory Data.

Step 14 Take off the ESD wrist strap or ESD gloves, and pack up all the tools. ----End Issue 07 (2011-08-30)


21



Follow-up Procedure 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 detailed information about the replaced component.

l

Contact the local Huawei office to handle the faulty component.

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, and external alarm collection port, and controls and manages the entire base station.

Prerequisite l

After confirming the type of a faulty board, do as follows: – If the board can be queried online, run the associated command on the LMT to 5.1.1 Query Electronic Label of the Board. – If the board is faulty and cannot be queried online, query the board information offline on the M2000. For details, see Querying Inventory Data.

l

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

l

If a static IP-based base station is used, the Ethernet cable and the PC installed with the SMT application are available. For details about the hardware requirements of the PC, see the GSM SMT User Guide.

l

The associated personnel have been permitted to access the site and obtained the required keys.

l

Figure 5-4 shows the position of the GTMU in the BBU.

Context

Figure 5-4 Position of the GTMU GTMU

CPRI0

TX0

RX0

TX1

1

RX1 TX2

2

CPRI2

RX2

TX3

3

RX3 TX4

4

CPRI4

RX4

TX5

5

RX5 LIU0 LIU2 LIU1 LIU3

CPRI1

ETH

TX

FE0

RX

FE1

CPRI3

CPRI5 RUN ALM ACT

USB TST

E1/T1

RST

GTMU

l

The board is hot-swappable.

l

If a multi-mode base station supports co-transmission and the shared ports for cotransmission are on the GTMU, replacing the GTMU disrupts the services of the other mode. Typical scenario: The GU multi-mode base station supports co-transmission over TDM through the E1/T1 ports on the GTMU board. The UMTS data is transmitted through the backplane in the manner of TDM over Packet (TOP).

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l


On a dual-star GU or GL network, replacing the GTMU influences UMTS services or LTE services. Specifically, a 20-second influence and a 1-second influence will occur within five minutes.

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

On the BSC, run the SET GCELLADMSTAT command to block all the cells of the base station.

2.

If a static IP-based base station is used, run the LST BTSIPRT command to query the IP address and route information on the BSC. Otherwise, go to Step 2.

Step 2 Wear an ESD wrist strap or ESD gloves.

CAUTION Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the module to the replaced. Step 4 Disconnect the transmission cable and CPRI 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 5-5. Figure 5-5 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the GTMU, as shown in Figure 5-6. Figure 5-6 Removing the GTMU

1

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23



Step 6 Set the DIP switches on the new board according to the settings of the DIP switches on the faulty board. If required, query the information about the DIP switch by referring to GTMU. Step 7 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 8 Check the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see GTMU. Step 9 If a static IP-based base station is used, perform the following operations: 1.

Connect the PC installed with the SMT application to the ETH port on the GTMU, as shown in Figure 5-7. Figure 5-7 Connecting the GTMU

2.

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

3.

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

Step 10 Perform following operations on the LMT: 1.

Query the software version of the board. For details, see the BSC6900 GSM LMT User Guide. If the software version is the target version, go to step c. If not, go to Step 10.2.

2.

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

3.


Step 11 Perform following operations on the M2000: 1.

Run the SET GCELLADMSTAT command to unblock all the cells of the base station.

2.


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



l

Fill in the fault form to record detailed information of the replaced components.

l


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5.1.4 Replacing the WMPT The WCDMA main processing & transmission unit (WMPT) processes signals and manages resources on other boards.

Prerequisite l


l


l


l

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

Context

Figure 5-8 Position of the WMPT in the BBU

TX

WMPT ETH

FE0

RX

FE1

RUN ALM ACT

USB TST

E1/T1

RST

GPS

WMPT

l

The WMPT is hot-swappable.

l

If a multi-mode base station supports co-transmission and the shared ports for cotransmission are on the WMPT, replacing the WMPT interrupts the services of the other mode. For example, a GU multi-mode base station supports IP co-transmission through the Ethernet link on the WMPT. The IP co-transmission can be implemented based on the interconnection between the FE ports on the WMPT and GTMU panels.

Procedure Step 1 Instruct the M2000 administrator to perform the following operations before replacing the WMPT: 1.

Upload the NodeB configuration file on the M2000 by using the file transfer protocol (FTP). For details, see Creating NodeB Commissioning Tasks.

2.

On the NodeB, run the BLK LOCELL command to block all the cells of the NodeB.


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WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the board to be replaced. Step 4 Disconnect the transmission cable from the WMPT. If a surge protection board is configured, the surge protection transfer cable also needs to be disconnected, as shown in Figure 5-9. Figure 5-9 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the WMPT, as shown in Figure 5-10. Figure 5-10 Removing the WMPT

2 1

Step 6 Set the DIP switches on the new board according to the settings of the DIP switches on the faulty board. For details, see WMPT. Step 7 Install the new board, tighten the screws on the board to 0.6 N·m, and then reconnect the cables. Step 8 Check the status of the new board by observing the status of indicators. For details about the status of the indicators, see WMPT. Step 9 Perform the following operations on the LMT: 1.

Upgrade the NodeB software and configuration file. For details, see Upgrading the NodeB Software.

2.

Check whether any alarm is reported. For details, see Browsing Alarms. If an alarm is reported, clear the alarm by referring to Querying Alarm Handling Suggestions.


On the NodeB, run the UBL LOCELL command to unblock all the cells of the NodeB.

2.


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26


3.


Set the status from TESTING to NORMAL. For details, see Setting the Maintenance Mode.

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



l

Fill in the fault form with the detailed information of the replaced component.

l


5.1.5 Replacing the LMPT The LTE main processing & transmission unit (LMPT) manages the entire eNodeB system in terms of O&M and signaling processing and provides system clock for the BBU3900.

Prerequisite l


l


l


l

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

Context

Figure 5-11 Position of the LMPT

LMPT TX

RX

SFP 0

TX

RX

SFP 1

RUN ALM ACT

USB TST

ETH

FE/GE0

FE/GE1

RST

GPS

LMPT

l


Procedure Step 1 Instruct the M2000 administrator to perform the following operations before replacing the LMPT: Issue 07 (2011-08-30)


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1.

Back up NE configuration data. For details, see the Creating eNodeB Commissioning Tasks.

2.

On the eNodeB, run the ULD LICENSE command to back up the license file.

3.

On the eNodeB, run the BLK CELL command to block all the cells of the eNodeB.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the board to be replaced. Step 4 Disconnect the cables from the LMPT, as shown in Figure 5-12. Figure 5-12 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the LMPT, as shown in Figure 5-13. Figure 5-13 Removing the LMPT

2 1

Step 6 Install a new board, tighten the screws on the board to 0.6 N·m, and then reconnect the cables. Step 7 Check the status of the new board by observing the status of indicators. For details about the status of the indicators, see LMPT. Step 8 Perform the following operations on the LMT: 1.

Establish the OM link between the eNodeB and the M2000 by the function of automatically discovering the eNodeB. Then, download the configuration file and software manually. For details, see Managing eNodeB Software and Data Configuration File.

2.


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On the eNodeB, run the INS LICENSE command to load the license file.

2.

On the eNodeB, run the UBL CELL command to unblock all the cells of the eNodeB.

3.





l

Fill in the fault form with detailed information about the replaced component.

l


5.1.6 Replacing the WBBP The WCDMA Baseband Process Unit (WBBP) is configured in the BBU and it processes baseband signals.

Prerequisite l


l


l


l

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

Context

Figure 5-14 Position of the WBBP

WBBP

TX

RX TX

CPRI0/EIH0

RX TX

CPRI1/EIH1

RX

RUN ALM ACT

CPRI2/EIH2

WBBP

l Issue 07 (2011-08-30)

The WBBP is hot-swappable. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

29



Procedure Step 1 Instruct the M2000 administrator to perform the following operations before replacing the WBBP: 1.

On the NodeB, run the BLK BRD command to block the WBBP.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the module to be replaced. Step 4 Disconnect the CPRI cable from the WBBP, as shown in Figure 5-15. Figure 5-15 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the WBBP, as shown in Figure 5-16. Figure 5-16 Removing the WBBP

2 1

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 the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see WBBP. Step 8 Perform following operations on the LMT: 1.

Issue 07 (2011-08-30)

Check whether any alarm is reported. For details, see Browsing Alarms. If an alarm is reported, clear the alarm by referring to Querying Alarm Handling Suggestions. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

30



Step 9 Inform the M2000 administrator that the replacement is complete, and then instruct the administrator to perform the following operations: 1.

On the NodeB, run the UBL BRD command to unblock the WBBP.

2.





l


l


5.1.7 Replacing the LBBP The LTE BaseBand Processing unit (LBBP) in the BBU3900 processes the baseband signals and CPRI signals.

Prerequisite l


l


l


l

Figure 5-17 shows the position of the LBBP in the BBU.

Context

Figure 5-17 Position of the LBBP

LBBP

TX

RX TX

CPRI 0

RX TX

CPRI 1

RX TX

CPRI 2

RX TX

CPRI 3

RX TX

CPRI 4

RX

RUN ALM ACT

CPRI 5

LBBP

l Issue 07 (2011-08-30)

The board is hot-swappable. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

31



Procedure Step 1 Instruct the M2000 administrator to perform the following operations before replacing the LBBP: 1.

On the eNodeB, run the BLK BRD command to block the LBBP.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the CPRI cable connections on the panel of the board to be replaced. Step 4 Disconnect the CPRI cable from the LBBP, as shown in Figure 5-18. Figure 5-18 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the LBBP, as shown in Figure 5-19. Figure 5-19 Removing the LBBP

2 1

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 the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see LBBP. Step 8 Perform following operations on the LMT: Issue 07 (2011-08-30)


32


1.




On the eNodeB, run the UBL BRD command to unblock the LBBP.

2.





l


l


5.1.8 Replacing the FAN Unit The FAN unit is located in the BBU. The FAN 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


l


l


l

Figure 5-20 shows the position of the FAN unit in the BBU.

Context

Figure 5-20 Position of the FAN unit

FAN

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33



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 ESD gloves.

WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Remove the two M3 screws on the panel, and then pull out the FAN unit, as shown in Figure 5-21. Figure 5-21 Removing the FAN unit

1

2

CAUTION When removing the FAN unit, do not touch the rotating fans to avoid injury of your hands. Step 3 Install the new unit, tighten the screws on the unit until the tightening torque reaches 0.6 N·m. Step 4 Check the status of the LEDs to determine whether the new module works properly. For details about the status of the LEDs, see FAN. Step 5 Perform the following operations on the local maintenance terminal (LMT): NOTE


1.

Issue 07 (2011-08-30)

On the UMTS side, check whether any alarm is reported on the NodeB LMT. For details, see Browsing Alarms. If an alarm is reported, clear the alarm by referring to Querying Alarm Handling Suggestions. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

34



2.


3.







l


l


5.1.9 Replacing the UPEU The Universal Power and Environment Interface Unit (UPEU) is configured in the BBU and it converts –48 V DC or +24 V DC power into +12 V DC.

Prerequisite l


l


l


l

Figure 5-22 shows the position of the UPEU in the BBU.

Context

Figure 5-22 Position of the UPEU

UPEU

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l


Replacing the UPEU disrupts the power supply to the BBU, and accordingly disrupts services carried by the BBU. Therefore, the UPEU should be replaced within 10 minutes.

Procedure Step 1 Instruct the M2000 administrator to perform the following operations before replacing the UPEU: 1.

On the NodeB, run the BLK LOCELL command to block all the cells working in UMTS mode.

2.

On the eNodeB, run the BLK CELL command to block all the cells working in LTE mode.

3.

On the BSC, run the LST GCELL command to query the configuration of all the cells of the base station working in GSM mode, and then run the SET GCELLADMSTAT command to block these cells. NOTE

In a multi-mode base station, the cells of each mode should be blocked separately.

CAUTION Replacing the UPEU disrupts all the services carried by the base station if no standby UPEU is configured. Step 2 Power off the BBU. For details, see Powering Off the BBU3900. Step 3 Wear an ESD wrist strap or ESD gloves.

WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 4 Record all the cable connections on the panel of the module to the replaced. Step 5 Disconnect the power cable, monitoring cable, and alarm cable from the UPEU, as shown in Figure 5-23. Figure 5-23 Disconnecting the cable

Step 6 Remove the two M3 screws on the panel, and then pull out the UPEU, as shown in Figure 5-24. Issue 07 (2011-08-30)


36



Figure 5-24 Removing the UPEU

1

2

Step 7 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 8 Power on the BBU. For details, see Powering on the BBU3900. Step 9 Check the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see UPEU. Step 10 Perform the following operations on the local maintenance terminal (LMT): NOTE


1.


2.


3.


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


2.


3.


4.



Issue 07 (2011-08-30)


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l

Fill in the fault form with the detail information of the replaced component.

l


5.1.10 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


l


l


l

Figure 5-25 shows the position of the UEIU in the BBU.

Context

Figure 5-25 Position of the UEIU UEIU

l


l

Replacing the UEIU may cause the failure to monitor the external equipment. Therefore, the UEIU must be replaced within five minutes.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Issue 07 (2011-08-30)


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Step 2 Record all the cable connections on the panel of the module to the replaced. Step 3 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-26. Figure 5-26 Disconnecting the cable

Step 4 Remove the two M3 screws on the panel, and then pull out the UEIU, as shown in Figure 5-27. Figure 5-27 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 Perform the following operations on the local maintenance terminal (LMT): NOTE


1.


2.


3.




Step 8 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End Issue 07 (2011-08-30)


39





l


l


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

Prerequisite l


l

The tools and materials are ready. They are the ESD wrist strap or ESD gloves and screwdriver.

l


l

Figure 5-28 shows the position of the USCU in the BBU.

Context

Figure 5-28 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



WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Issue 07 (2011-08-30)


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Step 2 Record all the cable connections on the panel of the module to the replaced. Step 3 Remove the GPS clock signal cable on the USCU, as shown in Figure 5-29. Figure 5-29 Disconnecting the cable

Step 4 Remove the two M3 screws on the panel, and then pull out the USCU, as shown in Figure 5-30. Figure 5-30 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 the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see USCU. Step 7 Perform the following operations on the local maintenance terminal (LMT): NOTE


1.


2.


3.


Step 8 Perform following operations on the M2000: Issue 07 (2011-08-30)


41


1.






l


l


5.1.12 Replacing the UTRP The Universal Transmission Processing unit (UTRP) in the BBU3900 provides ports for transmission.

Prerequisite l


l


l


l

Figure 5-31 shows the recommended position of the UTRP in the BBU.

Context

Figure 5-31 Position of the UTRP UTRP UTRP

RUN ALM ACT

E1/T1(0-3)

E1/T1(4-7)

l


l

The UTRP supports co-transmission of a multi-mode base station, and the shared ports for co-transmission are on the UTRP. Therefore, replacing the UTRP disrupts the services of the other mode.

Issue 07 (2011-08-30)


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


2.


3.

On the BSC, run the SET GCELLADMSTAT command to block all cells working in GSM mode.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the module to the replaced. Step 4 Disconnect the transmission cable from the UTRP. If a surge protection board is configured, the surge protection transfer cable also needs to be disconnected, as shown in Figure 5-32. Figure 5-32 Disconnecting the cable

Step 5 Loosen the two M3 screws on the panel, and then remove the UTRP, as shown in Figure 5-33. Figure 5-33 Removing the UTRP

Issue 07 (2011-08-30)


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Step 6 Set the DIP switches on the new board according to the settings of the DIP switches on the faulty board. If required, query the information about the DIP switch by referring to UTRP. Step 7 Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 N·m, and then reconnect the cables. Step 8 Check the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see UTRP. Step 9 Perform the following operations on the local maintenance terminal (LMT): NOTE


1.


2.


3.




2.


3.


4.





l


l


5.1.13 Replacing the UBRI Replacing the Universal BaseBand Radio Interface Board (UBRI) disrupts all the services carried on the board.

Prerequisite l Issue 07 (2011-08-30)

After confirming the type of a faulty board, do as follows: Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

44



– If the board can be queried online, run the associated command on the LMT to 5.1.1 Query Electronic Label of the Board. – If the board is faulty and cannot be queried online, query the board information offline on the M2000. For details, see Querying Inventory Data. l


l


l

Figure 5-34 shows the position of the UBRI in the BBU.

Context

Figure 5-34 Position of the UBRI in the BBU

UBRI

TX

RX TX

CPRI 0

RX TX

CPRI 1

RX TX

CPRI 2

RX TX

CPRI 3

RX TX

CPRI 4

RX

RUN ALM ACT

CPRI 5

UBRI

The UBRI is hot-swappable.

Procedure Step 1 Instruct the M2000 administrator to perform the following operations before replacing the UBRI: 1.


2.


3.

On the BSC, run the LST GCELL command to query the configuration of all the cells of the base station working in GSM mode, and then run the SET GCELLADMSTAT command to block these cells. NOTE

In a multi-mode base station, the cells of each mode should be blocked separately.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the module to the replaced. Step 4 Disconnect the CPRI cable from the board, as shown in Figure 5-35. Issue 07 (2011-08-30)


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Figure 5-35 Disconnecting the cable

Step 5 Remove the two M3 screws on the panel, and then pull out the UBRI, as shown in Figure 5-36. Figure 5-36 Removing the UBRI

2 1

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 the status of the LEDs to determine whether the new board works properly. For details about the status of the LEDs, see UBRI. Step 8 Perform the following operations on the local maintenance terminal (LMT): NOTE


1.


2.


3.




2.


3.


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4.






l

Fill in the fault form with the detail information of the replaced component.

l


5.1.14 Replacing the Optical Module The optical module implements optical-electrical conversion, thus enabling optical transmission between the BBU and other devices.

Prerequisite l

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

l

All the types of optical module are ready.

l


l

Figure 5-37 shows the position of the optical module on a board.

Context

Figure 5-37 Position of the optical module

1

(1) Optical module

l

Optical modules are hot-swappable.

l

Replacing the optical module disrupts the services on this port.

Procedure Step 1 Wear an ESD wrist strap or a pair of ESD gloves. Issue 07 (2011-08-30)


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CAUTION Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or other electronic components. Step 2 Prepare the optical module of the same type as the faulty optical module according to the label on the module. NOTE

The optical module to be replaced or to be installed must have a matching rate with the corresponding CPRI port.

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 5-38. Figure 5-38 Disconnecting the cable

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 5-39.

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Figure 5-39 Removing the optical module

Step 6 Install the new optical module onto the BBU. Step 7 Remove the dustproof caps from the new optical module and optical connector, and then insert the optical cable connector into the new optical module. Step 8 Check whether the transmission is proper according to the status of the LEDs on the board. For details about the status of the LEDs on the board, see the related hardware description. Step 9 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End


Put the replaced components into an ESD box or bag. Then, put the ESD box or bag into a carton padded with foam or into the packing boxes of the new components.

l


l

Contact the local Huawei office to handle the faulty components.

5.2 Adding Components in the BBU3900 During the maintenance of the baseband unit (BBU), some boards may be added, such as a universal power and environment interface unit (UPEU) or a WCDMA Baseband Process Unit (WBBP).

5.2.1 Adding a UPEU The power of the baseband unit (BBU) may exceed the power supported by the universal power and environment interface unit (UPEU). Therefore, a UPEUc is required. NOTE

If the BBU is installed in an outdoor mini box (OMB) or indoor mini box (IMB03) with an AC power supply, the BBU cannot be equipped with two UPEUs.

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Adding a UPEUc If a universal power and environment interface unit (UPEU) is already installed in the baseband unit (BBU), a UPEUc can be added.

Prerequisite l

The tools and materials are ready, such as the electrostatic discharge (ESD) wrist strap or ESD gloves and M3 screwdriver.

l

Associated personnel have obtained keys and site access permission.

Context If the power of the BBU exceeds the power supported by the UPEU, a UPEUc must be added. A UPEUa is already installed in slot 19 and the new UPEUc can be installed in slot 18, as shown in Figure 5-40. Figure 5-40 Slot for holding the new UPEUc

Procedure Step 1 Wear the ESD wrist strap or ESD gloves.

WARNING Take proper ESD protection measures, for example, wear the ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Install a UPEUc in slot 18 and tighten the screws on the panel to 0.6 N·m, as shown in Figure 5-41. Figure 5-41 Installing a UPEUc

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Step 3 Install a power cable for the UPEUc. For details about the operation, see related installation guide. 1.

Link the 3V3 power connector at one end of the cable to the –48V port on the UPEUc, and then tighten the screws on the connector to 0.25 N·m.

2.

Link the other end of the cable to the power supply equipment onsite.

Step 4 Power on the BBU. For details, see Powering on the BBU3900. Step 5 Check the status of the indicators to determine whether the new board works properly by referring to UPEU. Step 6 Perform the following operations on the Local Maintenance Terminal (LMT): 1.

On the NodeB, run the ADD BRD command to configure the installed UPEUc.

2.

On the eNodeB, run the ADD BRD command to configure the installed UPEUc.

3.

On the BSC, run the ADD BTSBRD command to configure the installed UPEUc.


Adding a UPEUc to Replace the UEIU If a universal power and environment interface unit (UPEU) and a universal environment interface unit (UEIU) are installed in the BBU, you can replace the UEIU with a UPEUc.

Prerequisite l


l


Context A UPEUa is installed in slot 19 and the UEIU to be removed is installed in slot 18, as shown in Figure 5-42. Figure 5-42 Slot of the UEIU to be removed

Procedure Step 1 Instruct the M2000 administrator to perform the following operations: Issue 07 (2011-08-30)


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1.

Run the LST ALMPORT command to record the configuration data for alarms on the board.

2.

Run the RMV BRD command to remove the UEIU.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panel of the module to the replaced. Step 4 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-43. Figure 5-43 Disconnecting the cable


1 2

Step 6 Install a UPEUc in slot 18 and tighten the screws on the panel to 0.6 N·m, as shown in Figure 5-45. Figure 5-45 Installing a UPEUc

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2.


Step 8 Install the cables originally connected to the UEIU to the correct ports on the UPEUc based on the recorded cable connections of the UEIU. Step 9 Power on the BBU. For details, see Powering on the BBU3900. Step 10 Check the status of the indicators to determine whether the new board works properly by referring to UPEU. Step 11 Perform the following operations on the Local Maintenance Terminal (LMT): 1.


2.


3.


4.

On the NodeB, eNodeB, and BSC, Run the SET ALMPORT command to restore the alarm configuration data.


Follow-up Procedure Place the removed 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.

Adding two UPEUc Boards to Replace the UEIU and UPEUa If a universal power and environment interface unit (UPEUa) and a universal environment interface unit (UEIU) are installed in the baseband unit (BBU), you can replace the UPEUa and UEIU with two UPEUc boards.

Prerequisite l


l


Context The UEIU to be removed is installed in slot 18 and the UPEUa to be removed is installed in slot 19, as shown in Figure 5-46. Figure 5-46 Slots of the UEIU and UPEUa

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Procedure Step 1 Check whether the alarm cables are connected to the EXT_ALM ports on the UEIU and the UPEUa. If alarm cables are not connected to the ports, go to step 3. If alarm cables are connected to the ports, go to step 2. Step 2 Instruct the M2000 administrator to perform the following operations: 1.

Run the LST ALMPORT command to record the alarm configuration data on the UEIU and the UPEUa.

2.

Run the RMV BRD command to remove the UEIU and the UPEUa.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 4 Record all the cable connections on the panels of the UEIU and UPEUa. Step 5 Disconnect the monitoring cable and alarm cable from the UEIU, as shown in Figure 5-47. Figure 5-47 Disconnecting the cable


1 2

Step 7 Install a UPEUc in slot 18 and tighten the screws on the panel to 0.6 N·m, as shown in Figure 5-49. Issue 07 (2011-08-30)


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Figure 5-49 Installing a UPEUc



2.


Step 9 Install the cables originally connected to the UEIU to the correct ports on the UPEUc based on the recorded cable connections of the UEIU. Step 10 Power on the UPEUc in slot 18 by referring to Powering on the BBU3900. Step 11 Power off the UPEUa in slot 19 by referring to Powering Off the BBU3900. Step 12 Disconnect the power cable, monitoring cable, and alarm cable from the UPEUa, as shown in Figure 5-50. Figure 5-50 Disconnecting a cable

Step 13 Remove the two M3 screws on the panel, and then pull out the UPEU, as shown in Figure 5-51. Figure 5-51 Removing the UPEU

1

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2.


Step 16 Install the cables originally connected to the UPEUa to the correct ports on the UPEUc based on the recorded cable connections of the UPEUa. Step 17 Power on the UPEUc in slot 19 by referring to Powering on the BBU3900. Step 18 Check the status of the indicators to determine whether the new board works properly by referring to UPEU. Step 19 Perform the following operations on the Local Maintenance Terminal (LMT): 1.


2.


3.


4.



Follow-up Procedure Place the removed components 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 components.

Adding two UPEUc Boards to Replace Two UPEUa Boards If two universal power and environment interface units (UPEUa boards) are installed in the baseband unit (BBU), you can replace the UPEUa boards with two UPEUc boards. Issue 07 (2011-08-30)


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Prerequisite l


l


Context The UPEUa boards to be removed are installed in slot 18 and slot 19, as shown in Figure 5-53. Figure 5-53 Slot of the UPEUa boards

Procedure Step 1 Check whether alarm cables are connected to the EXT_ALM ports on the UPEUa boards. If alarm cables are not connected to the ports, go to step 2. If alarm cables are connected to the ports, instruct the M2000 administrator to perform the following operation: 1.

Run the LST ALMPORT command to record the alarm configuration data.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 3 Record all the cable connections on the panels of the two UPEUa boards. Step 4 Power off the UPEUa in slot 18 by referring to Powering Off the BBU3900. Step 5 Disconnect the cables connected to the UPEUa in slot 18, as shown in Figure 5-54. Figure 5-54 Disconnecting a cable

Step 6 Remove the UPEUa in slot 18, as shown in Figure 5-55. Issue 07 (2011-08-30)


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Figure 5-55 Removing the UPEUa in slot 18


Step 8 Connect the cables to the correct ports on the UPEUc installed in slot 18 based on the recorded cable connections. Step 9 Power on the UPEUc in slot 18 by referring to Powering on the BBU3900. Step 10 Power off the UPEUa in slot 19 by referring to Powering Off the BBU3900. Step 11 Disconnect the cables connected to the UPEUa in slot 19, as shown in Figure 5-54. Step 12 Remove the UPEUa in slot 19, as shown in Figure 5-57. Figure 5-57 Removing the UPEUa in slot 19

1

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Step 13 Install a UPEUc in slot 19 and tighten the screws on the panel to 0.6 N·m, as shown in Figure 5-58. Figure 5-58 Installing a UPEUc in slot 19

Step 14 Connect the cables to the correct ports on the UPEUc installed in slot 19 based on the recorded cable connections. Step 15 Power on the UPEUc in slot 19 by referring to Powering on the BBU3900. Step 16 Check the status of the indicators to determine whether the new board works properly by referring to UPEU. Step 17 Perform the following operations on the Local Maintenance Terminal (LMT): 1.


2.


3.


4.



Follow-up Procedure Place the removed components 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 components.

5.2.2 Adding a WBBP This section describes how to install a WCDMA baseband processing unit (WBBP) when a WBBP is required.

Prerequisite l


l


Context If a WBBP is added, the power of the BBU may exceed the power supported by the universal power and environment interface unit (UPEU). Therefore, a UPEUc is required. For details about Issue 07 (2011-08-30)


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how to install a UPEUc before installing the WBBP, see 5.2.1 Adding a UPEU. In some hot areas, if another UPEU is installed in the BBU in an outdoor AC cabinet, the FAN unit in the BBU must be replaced with a FANc unit that operates at a high speed. For details about how to replace a FAN unit, see 5.1.8 Replacing the FAN Unit. NOTE

A hot area refers to an area where the daily maximum temperature is higher than 45°C for more than 10 days in a year.


WARNING Take proper ESD protection measures, for example, wear an ESD wrist strap or ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Install the WBBP in the correct slot, as shown in Figure 5-59. NOTE

For details about the configuration principle of the WBBP, see Slot Assignment of the BBU3900.

Figure 5-59 Installing the WBBP

Step 3 If a common public radio interface (CPRI) cable must be connected to the WBBP, install the CPRI cable by referring to the related installation guide. Step 4 Perform the following operation on the Local Maintenance Terminal (LMT): 1.

Run the ADD BRD command to configure the installed WBBP.


5.3 Replacing an RFU Replacing a radio frequency unit (RFU) interrupts the services carried on the RFU. Issue 07 (2011-08-30)


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Prerequisite l

After confirming the type of the faulty RFU, perform the following operations: – If the RFU can be queried online, run commands on the local maintenance terminal (LMT). For details, see 5.1.1 Query Electronic Label of the Board. – If the RFU is faulty and cannot be queried online, the information about the RFU can be queried offline on the M2000. For details, see the procedure for querying inventory data in the M2000 documentation disk.

l

Tools and materials, such as an electrostatic discharge (ESD) wrist strap or a pair of ESD gloves, Phillips screwdriver, ESD box or ESD bag, dustfree cloth, key to the cabinet door, and torque wrench, are ready.

l


l

The RFU can be a Double Radio Frequency Unit (DRFU), GSM radio frequency unit (GRFU) V1, GRFU V2, GRFU V2a, Multi-Mode Radio Frequency Unit (MRFU) V1, MRFU V2, MRFU V2a, WCDMA radio frequency unit (WRFU), and LTE radio frequency unit (LRFU).

l

A functional RFU, which refers to the MRFU V2 operating at 900 MHz, can be returned to the storehouse of spare parts after the maximum transmit power is set to 0.

l

Replacing an RFU interrupts the services carried on the RFU.

l

It takes six to ten minutes to replace an RFU.

l

The GRFU V1 can be replaced by the GRFU V2, but the GRFU V2 cannot be replaced by the GRFU V1. For the differences between the GRFU V1 and GRFU V2, see GRFU.

l

The MRFU V1 can be replaced by the MRFU V2, but the MRFU V2 cannot be replaced by the MRFU V1. For the differences between the MRFU V1 and MRFU V2, see MRFU.

l

The handle is used during the RFU replacement. The handle is placed in the slot at the upper right inside the cabinet door, as shown in Figure 5-60.

Context

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Figure 5-60 Slot for placing the handle

NOTE

The handle can be used only to pull the RFU and fan box outwards horizontally.

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

Procedure Step 1 If the RFU is functional and is replaced as a spare part, you need to check whether the maximum transmit power of the RFU to be replaced is locked. If the maximum transmit power of the RFU is locked, set the maximum transmit power to 0 before placing the RFU in the storehouse of spare parts. NOTE

l If the RFU is faulty, you are not required to set the maximum transmit power to 0. l If the maximum output power has not been set, the maximum output power of the transmit channel indicates the maximum output power in hardware specifications.

1.

To check whether a maximum transmit power is locked for an RFU, perform following operations: l Run the DSP RRU command to query the cabinet number, subrack number, slot number, TX channel number, and the maximum transmit power of the TX channels of the RFU of the NodeB.

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l Run the DSP RRU command to query the cabinet number, subrack number, slot number, TX channel number, and the maximum transmit power of the TX channels of the RFU or RRU in the eNodeB. l On the SMT-based GSM system, log in to the SMT. In the left pane of the Site Maintenance Terminal System window, click Site. In the right pane of the window, double-click Lock RXU Traffic Capability. In the displayed Lock RXU Traffic Capability window, click the Query Config tab. On the displayed tab page, select the target RFU. l On the LMT-based GSM system, log in to the LMT. Run the DSP BTSBRD command and click Assist. Set Information Type to RUNPARA(Running Parameter). Set BTS Index or BTS Name based on the selected Index Type. Set Board Type to RXU (RXU Board). Set RXU Index Type as required. Click Exec. View the Hardware Maximum Output Power of the TX Channel and Maximum Output Power of the TX Channel.

2.

If...

Then

The maximum transmit power is locked

Go to Step 1.2.

The maximum transmit power is not locked

Notify the M2000 administrator to block the corresponding RFU.

Set the maximum transmit power for the RFU to 0 to disable the locking for the maximum transmit power. l Run the LOC RRUTC command to disable the locking of the maximum transmit power for the RFU of the NodeB. l Run the LOC RRUTC command to disable the locking of the maximum transmit power for the RFU of the eNodeB. l On the SMT-based GSM system, log in to the SMT. In the left pane of the Site Maintenance Terminal System window, click Site. In the right pane of the window, double-click Lock RXU Traffic Capability. In the displayed Lock RXU Traffic Capability window, click the Config tab. On the displayed tab page, select the target RFU to set the maximum transmit power of the RFU to 0. l On the LMT-based GSM system, run the LOC BTSRXUTC command and click Assist. Set the maximum transmit power to 0 and click Exec. NOTE

l If multiple RFUs are involved, set the TX channels for each RFU. If the RFUs are in cascade mode, configure the RFUs in ascending order of connections to minimize the influence on services carried on RFUs.

Step 2 Notify the M2000 administrator to block the corresponding RFU. l Run the BLK BRD command to block the RFU of the NodeB. l Run the BLK BRD command to block the RFU of the eNodeB. l Run the SET GCELLADMSTAT command to block the carrier frequency of the RFU of the BTS. NOTE

l Block the RFU before replacing the RFU or replacing the RF jumper. l If the RFU to be replaced works in a multi-mode base station, block the RFU working in each mode. l The RFU cannot be blocked in the GSM system. Only the carrier frequency of the RFU can be blocked.

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Step 3 Verify that TX channels of the RFU are disabled. In this situation, the ACT indicator on the RFU panel blinks at 0.5 Hz. Step 4 Wear the ESD wrist strap or ESD gloves. NOTE

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

Step 5 Turn off the switch for DC power output for the RFU on the direct current distribution unit-01 (DCDU-01) to power off the RFU. Step 6 Label the power cable for the faulty RFU, and then disconnect the cable. Step 7 Label the RF jumper of the faulty RFU, loosen the DIN 7/16 elbow male connector of the RF jumper, and disconnect the RF jumper. Step 8 Label the common public radio interface (CPRI) cable for the RFU, and disconnect the CPRI cable. Step 9 Loosen the screws at the four corners of the RFU using a Phillips screwdriver, and then pull the RFU using the handle to move it outwards 50 mm to 100 mm, as shown in Figure 5-61. Use one hand to hold the RFU and use the other hand to pull the RFU out of the cabinet. Figure 5-61 Removing the RFU

Step 10 Place the removed RFU in an ESD box, and place the handle back to the original position. Step 11 Place the new RFU on guide rails, and slide it along the rails until it is in position. Step 12 Tighten the captive screws at the four corners of the RFU panel to secure the RFU in the subrack. Step 13 Connect the labeled CPRI cable to the new RFU. Step 14 Connect the labeled RF jumper to the new RFU, and tighten the DIN male elbow connector to 25 N·m to 35 N·m using a torque wrench. Step 15 Connect the labeled power cable to the new RFU and secure the cable. Issue 07 (2011-08-30)


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Step 16 Turn on the switch for DC output power on the DCDU-01 to power on the RFU. Step 17 Check the operating status of the RFU by observing indicator status. For details about the status of the indicators, see the hardware description of RFUs. Step 18 Perform the following operations on the Local Maintenance Terminal (LMT): 1.

If the locking of the maximum transmit power of the RFU is required, perform the following operations: l Run the LOC RRUTC command to set the maximum transmit power of the RFU of the NodeB. Run the RST BRD command to reset the RFU. Run the DSP TXBRANCH command to check whether the setting is successful. l Run the LOC RRUTC command to set the maximum transmit power of the RFU of the eNodeB. Run the RST BRD command to reset the RFU. Run the DSP TXBRANCH command to check whether the setting is successful. l On the SMT-based GSM system, log in to the SMT. In the left pane of the Site Maintenance Terminal System window, click Site. In the right pane of the window, double-click Lock RXU Traffic Capability. In the displayed Lock RXU Traffic Capability window, click the Config tab. On the displayed tab page, select the target RFU. Reset the RFU on the LMT to activate the configuration data. l On the LMT-based GSM system, run the LOC BTSRXUTC command and click Assist. Set the maximum transmit power and click Exec. Run the RST BTSBRD command. Set Reset Type to SOFTWARE(Software Reset) to reset the RFU and activate the configuration data. NOTE

l If the target maximum transmit power of the RFU is larger than the maximum transmit power the RFU supports, the setting is not required. l If multiple RFUs are involved, set the maximum transmit power of each RFU. l If multiple RFUs are involved, reset each RFU.

2.

Check whether any alarm is reported. For details, see Browsing Alarms. If an alarm is reported, clear the alarm by referring to Querying Alarm Handling Suggestions.

Step 19 On the M2000, perform the following operations: 1.

Run the MML commands to unblock the RFU. l Run the UBL BRD command to unblock the RFU of the NodeB. l Run the UBL BRD command to unblock the RFU of the eNodeB. l Run the SET GTRXADMSTAT command to unblock the carrier frequency of the RFU of the BTS.

2.

Synchronize the data manually. For details, see the M2000 Software and Hardware Management User Guide.

Step 20 Take off the ESD wrist strap or ESD gloves, and pack up all the tools. NOTE

After replacing the RFU, decide whether to immediately add the new RFU to the hopping set as required. For details, see the TRX Mutual Aid function in the SingleRAN Reconfiguration Guide.

----End

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l

Fill in the fault form with the detailed information of the replaced board.

l

Contact the local Huawei office to handle the replaced board that can be faulty.

5.4 Replacing a DCDU-01 The DCDU-01, installed under the BBU3900, supplies DC power for the cabinet.

Prerequisite l

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

l

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

l

Replacing the DCDU-01 disrupts the services carried on the corresponding cabinet.

l

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

Context

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

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 Power off the BTS3900 by referring to 4.2 Powering Off the BTS3900. Step 3 Label the cables connected to the output ports on the DCDU-01, and then disconnect them. Step 4 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 5-62.

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Figure 5-62 Removing the protection cover

(1) Protection cover

(2) Screw

(3) External input power cable

Step 5 Label the external input power cable for the DCDU-01, and then disconnect the cable. Step 6 Remove the four M6x12 screws from the two mounting ears of the DCDU-01, as shown in Figure 5-63. Figure 5-63 Removing the screws from the two mounting ears of the DCDU-01

Step 7 Remove the DCDU-01 by pulling out the DCDU-01 with one hand, and holding the DCDU-01 with the other hand. Step 8 Put the faulty DCDU-01 into an ESD box. Step 9 Install the new DCDU-01 into the position where the original one is located, and then use the four removed M6x12 screws to secure the DCDU-01 to the subrack. Step 10 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 Issue 07 (2011-08-30)


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(-), and then connect the OT terminal of the GND cable (black) to the terminal labeled RTN (+). Step 11 Place the protection cover on the DCDU-01, and then tighten the screws by using the Phillips screwdriver. Step 12 Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01 panel. Step 13 Connect the removed cables to the power output ports on the DCDU-01 panel according to the marks. Step 14 Power on the BTS3900 by referring to 4.1 Powering On the BTS3900. Step 15 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End

Follow-up Procedure 1.


2.

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

3.

Contact the local Huawei office to handle the faulty board.

5.5 Replacing the Fan Box The fan box works with the air inlet box in the cabinet to form a ventilation loop, and provides forced ventilation.

Prerequisite l


l


l

Replacing the fan box may result in over-temperature alarms due to interruption of heat dissipation for the cabinet, but services of the base station are not affected.

l

It takes about 20 minutes to replace a fan box.

l

The handle is used during the RFU replacement. The handle is placed in the slot at the upper right inside the cabinet door, as shown in Figure 5-64.

Context

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Figure 5-64 Slot for placing the handle

NOTE

The handle can be used only to pull the RFU and fan box outwards horizontally.



Step 2 Set the DC power switch labeled FAN on the DCDU-01 to OFF. Figure 5-65 shows the position of the power switch on the DCDU-01 for the fan box. Figure 5-65 Position of the switch for the fan box

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Step 3 Label the cables on the panel of the fan box and then remove the cables. Step 4 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 5-66. Figure 5-66 Raising the adjustable cable trough

(1) Upper mounting hole

(2) Captive screw

Step 5 Remove the four screws from the fan box. Pull out the fan box by one-third of its length with one hand by using the handle key, hold the fan box with the other hand, and then pull the entire fan box out of the cabinet, as shown in Figure 5-67. Then, put the faulty fan box into an ESD box. Figure 5-67 Removing the fan box

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Step 6 Install 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 panel of the fan box based on the labels. Step 9 Set the switch on the DCDU-01 for the fan box to ON. Step 10 Wear an ESD wrist strap or a pair of ESD gloves. NOTE


----End



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5.6 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.

Prerequisite l


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Replacing the power subrack (AC/DC) disrupts all services carried by the base station.

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

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Step 2 Power off the BTS3900 by referring to 4.2 Powering Off the BTS3900. Step 3 Label the cables on the panels of the power subrack (AC/DC) and PMU, and then disconnect them. Issue 07 (2011-08-30)


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Step 4 Loosen the screws on the panel of the PMU or PSU (AC/DC), which is located in the power subrack (AC/DC), as shown in Figure 5-68. Figure 5-68 Removing the PMU or PSU (AC/DC)

(1) Screws on the panel of the PMU

(2) PMU

(3) Power subrack

NOTE

Figure 5-68 shows the panel of the PMU. The two screws on the panel of the PSU (AC/DC) are in the same positions as the screws on the panel of the PMU.

Step 5 Raise the ejector levers on the panel of the PMU or PSU, and pull out the PMU or PSU along the slide rails, as shown in Figure 5-68. Step 6 Repeat steps Step 4 and Step 5 to remove all the PMU and PSUs from the power subrack (AC/ DC), and then place the removed PMU and PSUs into an ESD box. Step 7 Remove the four M6x12 screws from the two mounting ears of the power subrack (AC/DC), as shown in Figure 5-69.

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Figure 5-69 Removing the screws from the mounting ears

Step 8 Hold the power subrack (AC/DC) with one hand, and pull out the power subrack (AC/DC) with the other hand. Step 9 Place the removed power subrack (AC/DC) into an ESD box. Step 10 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 PMU and PSUs into the power subrack (AC/DC). Step 11 Reconnect the cables to the panels of the power subrack (AC/DC) and PMU according to the labels.

CAUTION For 220V AC three-phase power cable, remove the short-circuiting strips from the wiring terminals of the power subrack (AC/DC), and then connect the three live wires and the neutral wire. Refer to Installing an Input Power Cable for a BTS3900 Cabinet (220 V AC)in BTS3900 Installation Guide. Step 12 Power on the BTS3900 by referring to 4.1 Powering On the BTS3900. Step 13 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End

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5.7 Replacing the PMU The PMU performs the power system management, power distribution detection, and alarm reporting functions.

Prerequisite l


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This module is hot-swappable.

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Replacing the PMU does not affect the services.

Context



Step 2 Label the cables on the panel 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 panel, to prevent false alarms caused by bent pins. Step 3 Loosen the screws on the handle of the PMU panel by using a Phillips screwdriver. Step 4 Pull the handle gently to disconnect the PMU from the subrack, and then remove the PMU from the slot, as shown in Figure 5-70. Figure 5-70 Removing the PMU

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Step 5 Put the fault PMU into a ESD box. Step 6 Set the DIP switch on the new PMU, as shown in Figure 5-71. Figure 5-71 Setting the DIP switch

Step 7 Loosen the screws on the handle of the PMU. Then, pull the handle outwards. Step 8 Slide the PMU along the guide rails into the slot, and then push the handle back. Step 9 Tighten the screws on the handle, as shown in Figure 5-72. Figure 5-72 Installing the PMU

Step 10 Connect the cables, which have been disconnected from the PMU, according to the labels. Step 11 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End



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5.8 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.

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The module is hot-swappable.

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Replacing the PSU (AC/DC) causes power-off of the cabinet and thus disrupts all services carried by the base station.

Context



Step 2 Use a screwdriver to loosen the screws on the ejector levers of the panel of the PSU (AC/DC). Step 3 Raise the ejector levers and remove the PSU (AC/DC) from the subrack, as shown in Figure 5-73. Figure 5-73 Removing the PSU (AC/DC)

Step 4 Place the removed PSU (AC/DC) into an ESD box. Step 5 Use a screwdriver to loosen the screws on the ejector levers of the PSU (AC/DC) and raise the ejector levers. Step 6 Slide the PSU (AC/DC) into the subrack and lower the ejector levers. Step 7 Tighten the screws on the ejector levers. Figure 5-74 shows the entire installation process.

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Figure 5-74 Installing the PSU (AC/DC)




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5.9 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.

Prerequisite l


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Replacing the power subrack (DC/DC) disrupts all services carried by the base station.

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

Context



Step 2 Power off the BTS3900 by referring to 4.2 Powering Off the BTS3900. Step 3 Label the cables on panels of the power subrack (DC/DC), and then disconnect them. Step 4 Loosen the screws on the panel of the PSU, which is located in the power subrack (DC/DC), raise the ejector levers on the panel of the PSU, and pull out the PSU along the slide rails, as shown in Figure 5-75. Issue 07 (2011-08-30)


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Figure 5-75 Removing the PSU (DC/DC)

Step 5 Repeat step Step 4, remove all PSUs from the power subrack (DC/DC), and place the removed PSUs into an ESD box. Step 6 Remove the four M6x12 screws from the two mounting ears of the power subrack (DC/DC), as shown in Figure 5-76. Figure 5-76 Removing the screws from the mounting ears

Step 7 Hold the power subrack (DC/DC) with one hand, and pull out the power subrack (DC/DC) with the other hand. Step 8 Place the removed power subrack (DC/DC) into an ESD box. Step 9 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 10 Reconnect the cables to the panel of the power subrack (DC/DC) according to the labels. Step 11 Power on the BTS3900 by referring to 4.1 Powering On the BTS3900. Step 12 Take off the ESD wrist strap or gloves, and then pack up all the tools. ----End Issue 07 (2011-08-30)


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5.10 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.

Prerequisite l


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Replacing the PSU (DC/DC) maybe causes power-off of the cabinet and thus disrupts all services carried by the base station.

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The module is hot-swappable.

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Step 2 Use a screwdriver to loosen the screws on the ejector levers of the panel of the PSU (DC/DC). Step 3 Raise the ejector levers and remove the PSU (DC/DC) from the subrack, as shown in Figure 5-77. Figure 5-77 Removing the PSU (DC/DC)

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Step 4 Place the removed PSU (DC/DC) into an ESD box. Step 5 Use a screwdriver to loosen the screws on the ejector levers of the PSU (DC/DC) and raise the ejector levers. Step 6 Slide the PSU (AC/DC) into the subrack and lower the ejector levers. Step 7 Tighten the screws on the ejector levers. Figure 5-78 shows the entire installation process. Figure 5-78 Installing the PSU (DC/DC)




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BTS3900 (Ver.B) Site Maintenance Guide(07)(PDF)-En

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