DBS3900 WiMAX Site Maintenance Guide(V300R003C00_02)

DBS3900 WiMAX V300R003C00

Site Maintenance Guide Issue

02

Date

2010-10-22

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2010. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior 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 document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, 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 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

DBS3900 WiMAX Site Maintenance Guide

About This Document

About This Document

Overview After the DBS3900 WiMAX site is deployed, approved, and put into use, routine maintenance is performed to ensure the functionality of the DBS3900 WiMAX. This document describes the routine hardware maintenance items for the DBS3900 WiMAX, such as maintenance items concerning the equipment room, power supply system, grounding system, and DBS3900 equipment. The document also provides guidelines for replacing the components, modules, and cables of the DBS3900.

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

Product Name

Product Version

DBS3900 WiMAX

V300R003C00

Intended Audience This document is intended for: l

System engineers

l

Site maintenance engineers

Change History

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Version

Change History

02(2010-10-22)

This is a commercial version, which is released for the second time.


iii


About This Document

Version

Change History

01(2010-06-07)

This is a draft version, which is released for the first time. Compared with V300R002C03 02 (2010-04-26), this release has the following updates: l

8 Replacing the Components in the OMB is added.

l

5 Replacing the Components of the RRU3702/RRU3703 is modified.

Organization 1 Site Maintenance Preparations

The preparations for the DBS3900 site maintenance cover the activities of obtaining site information, selecting maintenance items, and arranging for tools and spare parts. 2 DBS3900 Routine Hardware Maintenance Tasks

The tasks of the routine hardware maintenance of the DBS39 00 include: the environmental maintenance of the equipment room, the maintenance of the power supply system and grounding system of the BTS, the maintenance of the BBU, t he maintenance of the RRU, the maintenance of cables, and the maintenance of the antenna system. 3 Powering On and Powering Off the DBS3900

When you power on the DBS3900, you need to check the status of the indicators of all the equipment. When you power off the DBS3900, you can choose the normal power-off or emergency power-off according to the actual situation. 4 Replacing the Components of the BBU3900

The faulty BBU3900 components must be replaced promptly. The components that can be replaced are the BBU case, boards, modules, and optical module. All boards are hot-swappable. When boards are running, abnormal power-off of boards will not cause damage to the hardware and software. 5 Replacing the Components of the RRU3702/RRU3703

The faulty RRU3702/RRU3703 components must be replaced promptly. The components that can be replaced are the RRU3702/RRU3703 module, and the optical module. 6 Replacing the Components of the Fan-Cooling RRU3701C

Faulty RRU3701C components must be replaced promptly. The components that can be replaced for the fan-cooling RRU3701C are the RRU3701C module, case, fan subrack, and optical module. 7 Replacing the Components of the Natural-Cooling RRU3701C

Faulty RRU3701C components must be replaced promptly. The components that can be replaced for the natural-cooling RRU3701C are the RRU3701C module, shell, and optical module. iv


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About This Document

8 Replacing the Components in the OMB

This section describes how to replace the HEUA board, AC/DC power cable, DCDU, and the AC surge protection box in the OMB. 9 Replacing the Components of the SLPU

During maintenance of the SLPU, the components to be replaced include the SLPU case and the UELP board. 10 Replacing the Surge Protector for the Antenna System

When the surge protector for the antenna system at the BBU side is faulty, you need to replace it. 11 Replacing the Cables of the DBS3900

When the DBS3900 cables are faulty, you need to replace them promptly. The cables can be replaced are: transmission cables, signal cables, and RF jumpers.

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.

Boldface

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


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About This Document

Convention

Description

Italic

Book titles are in italics.

Courier New

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

Command Conventions

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

Convention

Description

Boldface

The keywords of a command line are in boldface.

Italic

Command arguments are in italics.

[]

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

{ x | y | ... }

Optional items are grouped in braces and separated by vertical bars. One item is selected.

[ x | y | ... ]

Optional items are grouped in brackets and separated by vertical bars. One item is selected or no i tem is selected.

{ x | y | ... } *

Optional items are grouped in braces and separated by vertical bars. A minimum of one item or a maximum of all items can be selected.

[ x | y | ... ] *

Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected.

GUI Conventions

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

Convention

Description

Boldface

Buttons, menus, parameters, tabs, window, and dialog titles are in boldface. For example, click OK .

>

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

Keyboard Operations

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

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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...................................................................................................................iii 1 Site Maintenance Preparations................................................................................................1-1 2 DBS3900 Routine Hardware Maintenance Tasks................................................................2-1 2.1 Environmental Maintenance Tasks of the Equipment Room .........................................................................2-2 2.2 Power Su pply System and Grounding System Maintenance Tasks................................................................2-3 2.3 Maintenance Tasks of the BBU...................................................................................................................... 2-4 2.4 Maintenance Tasks of the RRU...................................................................................................................... 2-5 2.5 Maintenance Tasks of the Cables....................................................................................................................2-6 2.6 Maintenance Tasks of the Antenna System................................................................................................... 2-7

3 Powering On and Powering Off the DBS3900.....................................................................3-1 3.1 Powering On the BBU.....................................................................................................................................3-2 3.2 Powering Off the BBU....................................................................................................................................3-4 3.3 Powering On the RRU.....................................................................................................................................3-4 3.4 Powering Off the RRU....................................................................................................................................3-8

4 Replacing the Components of the BBU3900.........................................................................4-1 4.1 Replacing the Case of the BBU3900...............................................................................................................4-3 4.2 Re placing the BMPT.......................................................................................................................................4-5 4.3 Replacing the BBBI........................................................................................................................................ 4-7 4.4 Replacing the UPEU....................................................................................................................................... 4-9 4.5 Replacing the UEIU......................................................................................................................................4-11 4.6 Replacing the FAN........................................................................................................................................4-12 4.7 Replacing the UTRP......................................................................................................................................4-14 4.8 Replacing the USCU.....................................................................................................................................4-17 4.9 Replacing the Optical Modules.....................................................................................................................4-18

5 Replacing the Components of the RRU3702/RRU3703.......................................................5-1 5.1 Re placing the RRU3702/RRU3703................................................................................................................5-2 5.2 Re placing the Optical Modules.......................................................................................................................5-5

6 Replacing the Components of the Fan-Cooling RRU3701C..............................................6-1 6.1 Replacing the Fan-Cooling RRU3701C..........................................................................................................6-2 6.2 Replacing the RRU3701C Case......................................................................................................................6-3 6.3 Replacing the Fan Subrack of the RRU3701C................................................................................................6-4 Issue 02 (2010-10-22)


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Contents

6.4 Replacing the Optical Modules.......................................................................................................................6-5

7 Replacing the Components of the Natural-Cooling RRU3701C.......................................7-1 7.1 Replacing the Natural-Cooling RRU3701C................................................................................. ...................7-2 7.2 Replacing the Shell of the RRU3701C...........................................................................................................7-3 7.3 Replacing the Optical Modules.......................................................................................................................7-4

8 Replacing the Components in the OMB................................................................................8-1 8.1 Replacing the HEUA.......................................................................................................................................8-2 8.2 Replacing the AC/DC Power Equipment........................................................................................................8-4 8.3 Replacing the DCDU......................................................................................................................................8-9 8.4 Replacing the AC Surge Protection Box.......................................................................................................8-12

9 Replacing the Components of the SLPU ..............................................................................9-1 9.1 Replacing the SLPU Case...............................................................................................................................9-2 9.2 Replacing the UELP................................................ ........................................................................................9-3

10 Replacing the Surge Protector for the Antenna System.................................................10-1 11 Replacing the Cables of the DBS3900................................................................................11-1 11.1 Replacing the BBU Power Cables..............................................................................................................11-3 11.2 Replacing the Dry Contact Alarm Cables...................................................................................................11-4 11.3 Replacing the GPS Clock Signal Cables.....................................................................................................11-5 11.4 Replacing the Monitoring Signal Cables....................................................................................................11-6 11.4.1 Re placing the CMUA-BBU Monitoring Signal Cable......................................................................11-6 11.4.2 Re placing the EMUA Monitoring Signal Cable................................................................................11-7 11.5 Replacing E1/T1 Signal Cables of the BBU3900.......................................................................................11-8 11.6 Replacing the E1/T1 Surge Protection Transfer Cable...............................................................................11-9 11.7 Replacing FE/GE Ethernet Cables of the BBU3900.................................................................................11-10 11.8 Replacing FE/GE Optical Fibers of the BBU3900...................................................................................11-10 11.9 Replacing CPRI Optical Fibers.................................................................................................................11-11 11.10 Replacing the RRU Power Cables..........................................................................................................11-12 11.11 Replacing the AISG Multicore Cable of the RRU3702/RRU3703.........................................................11-14 11.12 Replacing the AISG Extension Cable of the RRU3702/RRU3703........................................................11-15 11.13 Replacing the RF Jumpers of the RRU3702/RRU3703..........................................................................11-16 11.14 Replacing the RF Jumper of the RRU3701C..........................................................................................11-17

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Figures

Figures Figure 4-1 Removing the BBU case.....................................................................................................................4-4 Figure 4-2 Position of the BMPT.........................................................................................................................4-5 Figure 4-3 Removing the BMPT..........................................................................................................................4-6 Figure 4-4 Position of the BBBI...........................................................................................................................4-7 Figure 4-5 Removing the BBBI........................................................................................................................... 4-8 Figure 4-6 Position of the UPEU......................................................................................................................... 4-9 Figure 4-7 Removing the UPEU........................................................................................................................4-10 Figure 4-8 Position of the UEIU........................................................................................................................4-11 Figure 4-9 Removing the cables.........................................................................................................................4-11 Figure 4-10 R emoving the UEIU.......................................................................................................................4-12 Figure 4-11 Position of the FAN........................................................................................................................4-13 Figure 4-12 R emoving the FAN.........................................................................................................................4-13 Figure 4-13 Position of the UTRP......................................................................................................................4-14 Figure 4-14 R emoving the cables.......................................................................................................................4-15 Figure 4-15 R emoving the UTRP......................................................................................................................4-16 Figure 4-16 Position of the USCU.....................................................................................................................4-17 Figure 4-17 R emoving the cable........................................................................................................................4-17 Figure 4-18 R emoving the USCU......................................................................................................................4-18 Figure 4-19 Position of the optical module........................................................................................................4-19 Figure 4-20 R emoving the fibers........................................................................................................................4-20 Figure 4-21 R emoving the optical module.........................................................................................................4-20 Figure 5-1 Loosening the screws on the main fixture..........................................................................................5-3 Figure 5-2 Tightening the screws on the attachment plate...................................................................................5-3 Figure 5-3 Hitting the RRU..................................................................................................................................5-4 Figure 5-4 Position of the optical module............................................................................................................5-5 Figure 5-5 Removing the fibers............................................................................................................................5-6 Figure 5-6 Removing the optical module.............................................................................................................5-7 Figure 6-1 Position of the optical module............................................................................................................6-6 Figure 6-2 Removing the fibers............................................................................................................................6-7 Figure 6-3 Removing the optical module.............................................................................................................6-7 Figure 7-1 Position of the optical module............................................................................................................7-5 Figure 7-2 Removing the fibers............................................................................................................................7-6 Figure 7-3 Removing the optical module.............................................................................................................7-6

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Figures

Figure 8-1 Position of HEUA...............................................................................................................................8-2 Figure 8-2 Removing the cables...........................................................................................................................8-3 Figure 8-3 Removing the HEUA..........................................................................................................................8-3 Figure 8-4 Position of the AC/DC power equipment in the cabinet....................................................................8-4 Figure 8-5 Positions of the components...............................................................................................................8-5 Figure 8-6 Disconnecting cables from the PDU..................................................................................................8-5 Figure 8-7 Disconnecting cables from the PMU..................................................................................................8-6 Figure 8-8 Disconnecting cables from the equipment subrack............................................................................8-6 Figure 8-9 Removing the PDU.............................................................................................................................8-7 Figure 8-10 Removing the PSU...........................................................................................................................8-7 Figure 8-11 Removing the PMU..........................................................................................................................8-8 Figure 8-12 Removing the equipment subrack....................................................................................................8-8 Figure 8-13 Position of the DCDU.....................................................................................................................8-10 Figure 8-14 Removing the cables.......................................................................................................................8-11 Figure 8-15 Removing the DCDU.....................................................................................................................8-11 Figure 8-16 Position of the AC surge protection box........................................................................................8-12 Figure 8-17 Removing the cables.......................................................................................................................8-13 Figure 8-18 Removing the AC surge protection box.........................................................................................8-14 Figure 9-1 Removing the SLPU...........................................................................................................................9-2 Figure 9-2 Position of the UELP..........................................................................................................................9-3 Figure 9-3 Removing the cable............................................................................................................................9-4 Figure 9-4 Removing the UELP...........................................................................................................................9-4

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Tables

Tables Table 2-1 Maintenance tasks for the environment of the equipment room..........................................................2-2 Table 2-2 Routine maintenance items for the power supply system and grounding system of the DBS3900 ...............................................................................................................................................................................2-4 Table 2-3 Equipment maintenance tasks..............................................................................................................2-5 Table 2-4 Equipment maintenance tasks..............................................................................................................2-5 Table 2-5 Maintenance tasks of the cables...........................................................................................................2-6 Table 2-6 Maintenance tasks of the antenna system............................................................................................2-7 Table 3-1 Indicators on the BBU3900..................................................................................................................3-2 Table 3-2 Indicators on the RRU3702..................................................................................................................3-5 Table 3-3 Indicators on the RRU3701C...............................................................................................................3-6 Table 3-4 Indicators on the RRU3703 .................................................................................................................3-7

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1 Site Maintenance Preparations

1

Site Maintenance Preparations

The preparations for the DBS3900 site maintenance cover the activities of obtaining site information, selecting maintenance items, and arranging for tools and spare parts.

Obtaining Site Information Before setting out for the DBS3900 site, obtain the following site information: l

The uncleared faults and alarms of the site (to make the maintenance process focused and purposeful)

l

Hardware configuration of the site (to avoid improper operation)

l

Local conditions (to prevent maintenance from being affected by external factors such as transportation and weather)

l

Spare parts (to prepare new boards or modules for replacement if required)

Selecting Maintenance Items Based on the specific situations of the DBS3900 site, select maintenance items from the following list: l

Maintaining the equipment room

l

Maintaining the power system and grounding system

l

Maintaining the BBU

l

Maintaining the RRU

l

Maintaining the cables

l

Maintaining the antenna system

Preparing Tools and Spare Parts l

Frequency test devices The following devices are used for frequency test: the frequency meter, spectrum analyzer, connectors and cables. The oscilloscope is often used.

l

Power test devices The power test devices are used to measure and analyze the output power of the DBS3900, which determines the effect of forward coverage.

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1 Site Maintenance Preparations

The power meter is often used. l

Antenna and feeder test devices The antenna and feeder test devices are used to locate faults and to measure the standing wave ratio, return loss, and cable insertion loss. The Site Master is often used.

l

Other materials

– Multimeter, ESD wrist strap or ESD gloves, screwdriver, ESD box or bag, dust free cloth, and wrench

– Ethernet cables for commissioning – Spare parts NOTE

Arrange for the tools and components according to the actual conditions of specified replacement.

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2

2 DBS3900 Routine Hardware Maintenance Tasks

DBS3900 Routine Hardware Maintenance Tasks

About This Chapter The tasks of the routine hardware maintenance of the DBS3900 include: the environmental maintenance of the equipment room, the maintenance of the power supply system and grounding system of the BTS, the maintenance of the BBU, t he maintenance of the RRU, the maintenance of cables, and the maintenance of the antenna system. 2.1 Environmental Maintenance Tasks of the Equipment Room This task enables you to maintain t he environment of the DBS3900 equipment room. 2.2 Power Su pply System and Grounding System Maintenance Tasks This describes the maintenance tasks for the power supply system and grounding system of the DBS3900. 2.3 Maintenance Tasks of the BBU This describes how to check the surface of the equipment, cleanness of the equipment, and indicators. 2.4 Maintenance Tasks of the RRU This describes how to check the surface of the equipment, cleanness of the equipment, and indicators. 2.5 Maintenance Tasks of the Cables The maintenance tasks of cables include checking the following items: the cable distribution and routing, signal cables, Ethernet cables, optical cables, connectors, and sockets. 2.6 Maintenance Tasks of the Antenna System The tasks of the maintenance of antenna system include checking towers, poles, antennas (including satellite antennas and RF antennas), and feeders.

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2.1 Environmental Maintenance Tasks of the Equipment Room This task enables you to maintain t he environment of the DBS3900 equipment room.

Maintenance Tasks for the Environment of the Equipment Room Table 2-1 lists the maintenance tasks for the environment of the equipment room. Table 2-1 Maintenance tasks for the environment of the equipment room

2-2

Maintenance Task

Period

Instruction

Check the environmental alarms of the equipment room.

Daily

Check whether the No power supply power supply alarm, alarm, fire alarm, fire alarm, smoke smoke alarm, and alarm, or security security alarm is alarm is generated in generated. the equipment room.

Check the temperature of the equipment room.

Every time you maintain the site

Record the temperature of the equipment room.

Check the humidity of the equipment room

Every time you maintain the site

Record the reading of 5% RH to 85% RH the hygrothermograph.

Check the lighting equipment of the equipment room

Every two months

Check whether the normal lighting and the emergency lighting are normal.

-

Check the indoor airconditioner

Every two months

Check whether the air-conditioner operates properly.

-


Reference Standard

-5°C to +45°C

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Maintenance Task

Period

Instruction

Check the disaster prevention measures

Every two months

Check whether the disaster prevention measures, equipment protection, and the fire hydrants are normal.

Clean the equipment room.

Every two months

Check whether the cabinet, the shell and interior of the equipment, the table, the floor, the window, and the door are clean.

Reference Standard l

The equipment room should be configured with the carbon dioxide fire extinguisher or the dry powder fire extinguisher. Check the pressure and the expired date of the fire extinguisher.

l

There should be no mice, ants, flies and other potential danger in the equipment room.

All objects in the equipment room should be clean and neat, and there is no visible dust on the cabinet.

2.2 Power Supply System and Grounding System Maintenance Tasks This describes the maintenance tasks for the power supply system and grounding system of the DBS3900.

Maintenance Items for the Power Supply System and Grounding System Table 2-2 describes the routine maintenance items for the power supply system and grounding system of the DBS3900.

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2-3



Table 2-2 Routine maintenance items for the power supply system and grounding system of the DBS3900

Item

Frequency

Operation

Standard

Power cable

Monthly or quarterly

Carefully check the The power cables are connections of power not aging, and there cables. is no corrosion on the joints.

Voltage


Measure the voltage of the power supply using a multimeter.

The external input voltage of the BBU ranges from -38.4 V DC to -57 V DC. The external input voltage of the RRU ranges from -36 V DC to -57 V DC.

PGND cable


Verify that the PGND cable and ground bar are connected securely.

The joints are secure and corrosion free.

Earth resistance


Measure the earth resistance using an electric earth resistance tester and record the measurement.

The earth resistance is smaller than 10 ohms.

Batteries

Annually

Check the battery The capacity of all and rectifier in the batteries meets the power supply system requirement and the of each equipment connections of the room. batteries are correct. The specifications of the rectifier meet the requirements.

2.3 Maintenance Tasks of the BBU This describes how to check the surface of the equipment, cleanness of the equipment, and indicators.

Equipment Maintenance Tasks Table 2-3 describes the equipment maintenance tasks for the BBU.

2-4


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Table 2-3 Equipment maintenance tasks

Item

Frequency

Operation

Standard

Equipment surface


Check whether the surface of the equipment is damaged and whether the label of the equipment is legible.

-

Equipment cleanliness


Check whether the equipment is clean.

The surface and inside of the equipment case are clean.

indicator check


Check whether the indicators on the equipment are functional.

For details on the meanings of the indicators, see 3.1 Powering On the BBU.

2.4 Maintenance Tasks of the RRU This describes how to check the surface of the equipment, cleanness of the equipment, and indicators.

Equipment Maintenance Tasks Table 2-4 describes the equipment maintenance tasks for the RRU. Table 2-4 Equipment maintenance tasks

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Item

Frequency

Operation

Standard

Equipment surface


Check whether the surface of the equipment is damaged and whether the label of the equipment is legible.

-

Equipment cleanliness


Check whether the equipment is clean.

The surface and inside of the equipment case are clean.


2-5



Item

Frequency

Operation

Standard

Indicator check


Check whether the indicators on the equipment are functional.

For details on the meanings of the indicators, see 3.3 Powering On the RRU.

2.5 Maintenance Tasks of the Cables The maintenance tasks of cables include checking the following items: the cable distribution and routing, signal cables, Ethernet cables, optical cables, connectors, and sockets. Table 2-5 lists the maintenance tasks of the cables. Table 2-5 Maintenance tasks of the cables

Task

Period

Instruction

Reference Standard

Cable distribution and routing

Weekly

Check whether all cable labels are clear.

The labels are legible.

Check the signal cables

Network cable

Annually

Optical cable

Annually

Check the connectors and sockets

2-6

Annually

Monthly (quarterly)

Check the connection of the signal cables carefully.

Check carefully the connections of the network cables.

Check carefully the connections of the optical cables.

Check whether the insulators of the connectors and sockets are stained with dust and oil.


l

The signal cables are connected securely.

l

The signal cables are intact.

l


l

The network cables are securely connected.

l

The network cables are not damaged.

l

The concentrators are intact.

l


l

The optical cables are securely connected.

l

The optical cables are intact.

l


The insulators are clear and not stained.

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2.6 Maintenance Tasks of the Antenna System The tasks of the maintenance of antenna system include checking towers, poles, antennas (including satellite antennas and RF antennas), and feeders. Table 2-6 lists the maintenance tasks of the antenna system. Table 2-6 Maintenance tasks of the antenna system

Task

Period

Towers

Check the tower structure, the contact of Every half a year connection bolts, and anticorrosion and antirust status.

The towers are not distorted, rusted or corroded. Connection bolts are properly tightened. The tower bases do not subside.

Poles

Check the fasteners, stay wires, ground Every half a year anchors, and anticorrosion and antirust status of poles.

The fasteners are not loose. The stay wires and ground anchors are evenly forced. The poles are not rusted or corroded.

Every two months

Check the connection between the antenna support and the tower or roof, and check whether antennas are in the protection scope of the lightning rod.

The antennas are protected from lightning in the tilt of 30° from the top of the lightning rod. The antenna support is securely connected to the tower or roof.

Every two months

Check whether feeder clips are loose and whether feeders are distorted or folded.

The feeder clips are installed securely. The feeders are not folded or distorted. No copper core is exposed.

Antennas

Feeders

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Instruction


Reference Standard

2-7


3

3 Powering On and Powering Off the DBS3900

Powering On and Powering Off the DBS3900

About This Chapter When you power on the DBS3900, you need to check the status of the indicators of all the equipment. When you power off the DBS3900, you can choose the normal power-off or emergency power-off according to the actual situation. 3.1 Powering On the BBU The BBU uses -48 V DC power. After the BBU3900 is powered on, you need to check the operating status of each indicator and ensure that each indicator is in normal state. 3.2 Powering Off the BBU This describes how to power off the BBU in a normal situation or in an emergency. 3.3 Powering On the RRU Power on the RRU. Determine the work ing state of the RRU according to the status of the indicators and ensure that the RRU is functional. 3.4 Powering Off the RRU This section describes how to power off the RRU in a normal situation or in an emergency.

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3.1 Powering On the BBU The BBU uses -48 V DC power. After the BBU3900 is powered on, you need to check the operating status of each indicator and ensure that each indicator is in normal state.

Prerequisite l

The installation of the hardware and cables of the BBU is complete.

l

The input voltage ranges from -38.4 V DC to -57 V DC.

Procedure Step 1 Set the circuit breaker on the external power supply equipment that provides power to the BBU to ON.

Step 2 Turn on the power switch of the BBU. Step 3 Check the status of the indicators on the boards and modules of the BBU. Table 3-1 describes the meanings of the indicators. Table 3-1 Indicators on the BBU3900

Board/ Module

Indicator

Color

State

Description

UPEU

RUN

Green

On

The power board is working properly.

Off

The power board stops working.

On

There is power input, but the board is faulty.

Off

There is no power input, or the board is faulty.

BMPT, USCU, UTRP

RUN

Green

Blinking at 0.5 Hz The board is working (on for 1s and off for properly. 1s) Blinking at 4 Hz (on The board is being for 0.125s and off for loaded. 0.125s) ALM

3-2

Red

On

An alarm is generated, and the board needs to be replaced.

Off

No alarm is generated.


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Board/ Module


Indicator

Color

State

Description

Blinking at 0.5 Hz An alarm is generated, (on for 1s and off for but you cannot 1s) determine that the board needs to be replaced. This alarm may be generated by a faulty board or port. ACT

BBBI

RUN

Green

Green

On

Active

Off

Standby

On

There is power input, but the board is faulty.

Off

There is no power input, or the board is faulty.

Blinking at 0.5 Hz The board is working as (on for 1s and off for configured. 1s) Blinking at 4 Hz (on The board is loading or for 0.125s and off for not started. 0.125s) ALM

Red

On

An alarm is generated, and the board needs to be replaced.

Off

No alarm is generated.

Blinking at 0.5 Hz An alarm is generated, (on for 1s and off for but you cannot 1s) determine that the board needs to be replaced. This alarm may be generated by a faulty board or port. ACT

FAN

STATE

Green

Green

On

The board is working.

Off

The board is not working.

Blinking at 4 Hz (on The board is not for 0.125s and off for registered, and no alarm 0.125s) is generated. Blinking at 0.5 Hz The board is working (on for 1s and off for properly. 1s)

Red

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On


An alarm is generated.

3-3



Step 4 Proceed with the next step according to the status of the indicator. If...

Then...

The boards and modules of the BBU are working properly,

The power-on procedure is complete.

Faults occur in the BBU,

Record the fault status, turn off the power switch, rectify the fault, and then go to Step 1.

----End

3.2 Powering Off the BBU This describes how to power off the BBU in a normal situation or in an emergency.

Procedure Step 1 Determine the method for powering off the BBU according to the actual situation. If...

Then...

The BBU needs to be powered off when you Turn off the power switch of the BBU, and swap the equipment or anticipate a territorial then turn off the power switch of the external power supply to the BBU. power outage. The BBU needs to be powered off in an emergency, such as fire, smoke, or water immersion,

Turn off the power switch of the external power supply to the BBU, and then turn off the power switch of the BBU.

----End

3.3 Powering On the RRU Power on the RRU. Determine the working state of the RRU according to the status of the indicators and ensure that the RRU is functional.

Prerequisite

3-4

l

Ensure that the installation of the RRU and the cables is correct and complete.

l

The input voltage ranges from -36 V DC to -57 V DC.


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Context

CAUTION

The RRU must be powered on within 24 hours after being unpacked or after being powered off for maintenance.

Procedure Step 1 Connect the power cable of the RRU to the output end of the external power equipment, and then turn on the power switch to power on RRU.

DANGER After the RRU is powered on, do not look directly at the beam from the optical module without taking the necessary eye protection measures.

Step 2 Wait for three to five minutes and then check the status of indicators on the RRU. Table 3-2 lists the meanings of the indicators on the RRU3702. Table 3-3 lists the meanings of the indicators on the RRU3701C. Table 3-4 lists the meanings of the indicators on the RRU3703. Table 3-2 Indicators on the RRU3702

Indicato r

Color

Status

Description

RUN

Green

On

There is power input but the board is faulty.

Off

No power input is available.

Blinks at 0.5 Hz (on for 1s, off for 1s)

The board is working normally.

Blinks at 4 Hz (on for The board is being loaded or not started. 0.125s, off for 0.125s) ALM

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Red

On

An alarm (except the standing-wave alarm) is generated and the board must be replaced.

Off

No alarm (except the standing-wave alarm) is generated.


An alarm (except the standing-wave alarm) is generated. Whether the board needs to be replaced is uncertain. It may be caused by a fault on the related board or port.


3-5



Indicato r

Color

Status

Description

TX_ACT

Green

On

The board is working properly (the transmit channel is active).

Off

The software version is being verified or the version verification fails.


The version verification succeeds but the transmit channel is inactive.

On

A standing wave alarm is generated.

Off

No standing wave alarm is generated.

On

The optical module is in position.

Off

The optical module is out of position.

On

The optical module is in position.

Off

The optical module is out of position.

VSWR

CPRI0

CPRI1

Red

Green

Green

Table 3-3 Indicators on the RRU3701C

Indicator

Color

Status

Meaning

RUN

Green

On

The system is powered on.

Off

The system is not powered on.

Blinks at 4 Hz (on for The module is being 0.125s, off for loaded or is not 0.125s) started.

ALM

3-6

Red


The module is working properly.

On

An alarm is generated and the corresponding module must be replaced.

Off

There is no alarm.


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Indicator

Color

ACT

Green

Status

Meaning


An alarm is generated. But whether the board needs to be replaced is uncertain. It may be caused by a fault on the related board or port.

On

The module is working properly.

Off

The module is not configured and not connected to the BBU.


The configuration is successful, but the transmit channel is blocked.

Table 3-4 Indicators on the RRU3703

Indicato r

Color

Status

Description

RUN

Green

On

There is power input but the board is faulty.

Off

There is no power input.


The board is working normally.

Blinks at 4 Hz (on for The board is being loaded or not started. 0.125s, off for 0.125s) ALM

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Red

On

An alarm (except the standing-wave alarm) is generated and the board must be replaced.

Off

No alarm (except the standing-wave alarm) is generated.


An alarm (except the standing-wave alarm) is generated. Whether the board needs to be replaced is uncertain. It may be caused by a fault on the related board or port.


3-7



Indicato r

Color

Status

Description

ACT

Green

On

The board is working normally (the sector is activated and the transmit channel is active).

Off

The software version is being verified or the version verification fails.


The version verification succeeds but the transmit channel is inactive (the sector is not activated).

On

A standing wave alarm is generated.

Off

No standing wave alarm is generated.

On (green)

The CPRI link is functional.

On (red)

An optical module receiving exception alarm is generated.

Off

The optical module is not in position.

On (green)

The CPRI link is functional.

On (red)

An optical module receiving exception alarm is generated.

Off

The optical module is not in position.

VSWR

CPRI0/ IR0

CPRI1/ IR1

Red

Red and green

Red and green

Step 3 Proceed with the next step according to the status of the indicator. If...

Then...

The RRU is working properly, The power-on procedure is complete. The RRU is faulty,

Record the faulty status, turn off the power switch, rectify the fault, and then go to Step 1.

----End

3.4 Powering Off the RRU This section describes how to power off the RRU in a normal situation or in an emergency.

Context The RRU can be powered off in a normal situation or in an emergency. The handling methods in these two situations are the same.

3-8


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l

In a normal situation: The RRU needs to be powered off when you swap the equipment or anticipate a territorial power outage.

l

In an emergency: The RRU needs to be powered off in an emergency, such as fire, smoke, or water immersion.

Procedure Step 1 Turn off the switch of the external power supply equipment of the RRU. NOTE

The external power supply equipment of the RRU is the APM or DCDU. Thus, you need to turn off the power switch of the RRU through the APM or DCDU.

----End

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3-9


4

4 Replacing the Components of the BBU3900

Replacing the Components of the BBU3900

About This Chapter The faulty BBU3900 components must be replaced promptly. The components that can be replaced are the BBU case, boards, modules, and optical module. All boards are hot-swappable. When boards are running, abnormal power-off of boards will not cause damage to the hardware and software. 4.1 Replacing the Case of the BBU3900 The case of the BBU3900 consists of the outer case and the Universal BBU Subrack Backplane Type C (2U) (BSBC). The BSBC is the backplane of the B BU3900, which provides power supply, clock , and the data of the control panel and service panel for each board. 4.2 Replacing the BMPT The BWA Main Processing&Transmission Unit (BMPT) is the main processing and transmission board of the BBU3900. The BMPT implements centralized management over the boards of the system. 4.3 Replacing the BBBI The BWA BaseBand Processing and Radio Interface Unit (BBBI) is the baseband processing and radio interface board of the BBU3900, which processes baseband signals and provides RF interfaces. There are two types of BBBI board: 8 HP and 4 HP. The procedures for replacing the two types of BBBIs are the same. The following procedure for replacing the 4 HP BBBI is given as an example. 4.4 Replacing the UPEU The Universal Power and Environment Interface Unit (UPEU) is the power and environment monitoring module of the BBU3900. The UPEU supports the -48 V DC power input and provides power to the boards in the BBU. 4.5 Replacing the UEIU The Universal Environment Interface Unit (UEIU) is the environment interface unit of the BBU3900. The UEIU reports alarms and information of the environment monitoring equipment to the BMPT. 4.6 Replacing the FAN The FAN module of the BBU is used to cool the BBU3900. The FAN and the air inlet box form an air duct for forcible ventilation and heat dissipation.

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4.7 Replacing the UTRP The Universal Transmission Processing Unit (UTRP) is the extended transmission board of the BBU3900 and provides eight E1/T1 interfaces. 4.8 Replacing the USCU The Universal Satellite card and Clock Unit (USCU) is the extended satellite card and clock unit of the BBU. The USCU receives the GPS, RGPS, BITS, and M-1PPS clock signals, and receives or transmits 1PPS + TOD clock signals. 4.9 Replacing the Optical Modules The optical module provides an interface for photoelectric conversion, which enables the transmission between the BBU and other equipment through the optical fiber. Replacing the optical modules requires removing the optical fibers. This disrupts the CPRI transmission signal. The procedures of replacing optical modules in different BS equipment are the same. The following section describes how to replace an optical module in the BBU.

4-2


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4.1 Replacing the Case of the BBU3900 The case of the BBU3900 consists of the outer case and the Universal BBU Subrack Backplane Type C (2U) (BSBC). The BSBC is the backplane of the BBU3900, which provides power supply, clock, and the data of the control panel and service panel for each board.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M6 screwdriver, and ESD box or bag.

l

The quantity and models of the components to be replaced are confirmed and new cases are ready.

l

Keep the keys ready for use after you obtain site admission.

Context Replacing the BBU case disrupts all the services carried by the BS. Therefore, the BBU case must be replaced within 20 minutes.

Procedure Step 1 Inform the administrator of the M2000 that the BBU case needs to be replaced and ask the administrator to perform the following operations: 1.

Obtain the BTS data configuration file by referring to Backing Up Configuration Data.

2.

If necessary, transfer the services carried by the boards in the BBU.

3.

Change the ESN to that of the new BBU case by referring to DHCP Parameter Preparation.

Step 2 Power off the BBU by referring to 3.2 Powering Off the BBU. Step 3 Wear the ESD wrist strap or ESD gloves.

CAUTION

When performing the replacement, take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

Step 4 Record the connection positions of all the cables connected to the boards in the BBU case. Step 5 Disconnect the cables from the boards in the BBU case. Step 6 Loosen the four M6 screws on the BBU case and then remove the BBU case, as shown in Figure 4-1.

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Figure 4-1 Removing the BBU case

NOTE

The procedure of replacing the BBU case with regularly installed mounting ears and that of replacing the BBU case with reversely installed mounting ears are the same. In the preceding figure, the BBU is in a 19inch space and the mounting ears are regularly installed.

Step 7 Remove all the boards in the faulty BBU case, install the boards to the new BBU case, and then install filler panels to the idle slots.

Step 8 Install the new BBU case, fasten the screws on the case [torque: 2 N.m (17.70 lbf.in.)], and then install the cables according to the recorded positions. NOTE

If the mounting ears of the BBU case to be replaced are revers ely installed, you need to install the mounting ears to the new BBU case in the same way. See the DBS3900 WiMAX Quick Installation Guide (RRU3702&RRU3703) for the procedure of reversely installing the mounting ears.

Step 9 Power on the BBU by referring to 3.1 Powering On the BBU. Step 10 Determine whether the new BBU case is functional according to the status of indicators of the boards in the BBU. NOTE

For description of the indicators, see DBS3900 WiMAX Hardware Description.

Step 11 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to confirm that the boards and modules in the BBU do not generate any alarms.

Step 12 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite

4-4

l

Put the replaced components into the ESD bag and then put the bag into the cardboard box filled with foam.

l

Fill the fault card to record the i nformation of the replaced components.

l

Contact the local Huawei office to handle the faulty components.


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4.2 Replacing the BMPT The BWA Main Processing&Transmission Unit (BMPT) is the main processing and transmission board of the BBU3900. The BMPT implements centralized management over the boards of the system.

Prerequisite l


l

The quantity and models of the boards to be replaced are confirmed.

l


l

Figure 4-2 shows the position of the BMPT in the BBU.

Context

Figure 4-2 Position of the BMPT

NOTE

This figure is only for your reference. Determine the actual configuration positions according to the onsite condition.

l

The board is hot-swappable.

l

If no backup BMPT is configured, replacing the BMPT disrupts all the services carried by the BS. Therefore, the BMPT must be replaced within 20 minutes.

Procedure Step 1 Inform the administrator of the M2000 that the BMPT needs to be replaced and ask the administrator to perform the following operations: 1.

Obtain the BTS data configuration file by referring to Backing Up Configuration Data.

2.

If necessary, transfer the services carried by the boards in the BBU.

Step 2 Wear the ESD wrist strap or ESD gloves.

CAUTION


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4-5



Step 3 Remove the board. 1.

Record the connection positions of all the cables connected to the board and then remove these cables.

2.

Loosen the two M3 screws on the panel, lift the ejector levers on the faulty board, and remove the faulty board from the slot, as shown in Figure 4-3. Figure 4-3 Removing the BMPT

2 1

3.

Put the removed board in an ESD bag.

Step 4 Install the new board. 1.

Insert the new board into the slot of the original faulty board.

2.

Press the ejector levers on the panel of the new board and fasten the screws on both sides of the panel of the board [torque: 0.6 N.m (5.31 lbf.in.)].

3.

Install the cables.

Step 5 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to perform the following operations: 1.

Run the DLD CFGFILE command to download the backup configuration data to the new BMPT.

2.

Run the ACT CFGFILE command to activate the configuration data.

3.

Run the DSP BRDVER command to check whether BootROM version and software version of the new board are correct. If the software version is incorrect, upgrade the BS software. For details of the procedures, see the DBS3900 WiMAX Upgrade Guide.

Step 6 Determine whether the new BMPT is functional according to the status of the indicators. 1.

In the normal state, the RUN indicator of the board blinks at 0.5 Hz (on for 1s and off for 1s) and the ALM indicator is off.

2.

The ACT indicator on the active board is on. NOTE



Postrequisite l

4-6

Put the replaced components into the ESD bag and then put the bag into the cardboard box filled with foam. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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l


l


4.3 Replacing the BBBI The BWA BaseBand Processing and Radio Interface Unit (BBBI) is the baseband processing and radio interface board of the BBU3900, which processes baseband signals and provides RF interfaces. There are two types of BBBI board: 8 HP and 4 HP. The procedures for replacing the two types of BBBIs are the same. The following procedure for replacing the 4 HP BBBI is given as an example.

Prerequisite l


l


l

Admission to the site is obtained and the keys to the site are ready.

l

Figure 4-4 shows the position of the BBBI in the BBU.

Context

Figure 4-4 Position of the BBBI

NOTE

This figure is only for your reference. Determine the actual configuration positions according to the onsite condition.

l


l

Replacing the BBBI disrupts all the services carried by the BS. Therefore, the BBBI must be replaced within 20 minutes.

l

The procedure described here is applicable to replacing BBBIs of the same type as the 8 HP or 4 HP BBBI. See DBS3900 WiMAX Reconfiguration Guide to replace BBBIs of a different type from the 8 HP or 4 HP BBBI.

Procedure Step 1 Inform the administrator of the M2000 that the BBBI needs to be replaced. If necessary, ask the administrator to transfer the services carried by the board.


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4-7



CAUTION


Step 3 Remove the board. 1.

Record the connection positions of all the cables connected to the board and then remove these cables.

2.

Loosen the two M3 screws on the panel, lift the ejector levers on the faulty board, and remove the faulty board from the slot, as shown in Figure 4-5. Figure 4-5 Removing the BBBI

2 1

3.

Put the removed board in an ESD bag.

Step 4 Install the new board. 1.

Insert the new board into the slot of the original faulty board.

2.

Press the ejector levers on the panel of the new board and fasten the screws on both sides of the panel of the board [torque: 0.6 N.m (5.31 lbf.in.)].

3.

Install the cables.

Step 5 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to run the DSP BRDVER command to check whether the BootROM version and software version of the new board are correct. If the software version is incorrect, upgrade the BS software. For details of the procedures, see the DBS3900 WiMAX Upgrade Guide.

Step 6 Determine whether the new BBBI is functional according to the status of the indicators. In the normal state, the RUN indicator of the board blinks at 0.5 Hz (on for 1s and off for 1s). NOTE

For description of the indicators, see DBS3900 WiMAX Hardware Descript ion.

Step 7 Remove the ESD wrist strap or ESD gloves and put the tools away. ----End

4-8


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Postrequisite l

Put the replaced components into an ESD bag and then put the bag into a cardboard box filled with foam.

l


l


4.4 Replacing the UPEU The Universal Power and Environment Interface Unit (UPEU) is the power and environment monitoring module of the BBU3900. The UPEU supports the -48 V DC power input and provides power to the boards in the BBU.

Prerequisite l


l

The quantity and models of the modules to be replaced are confirmed.

l


l

Figure 4-6 shows the position of the UPEU in the BBU.

Context

Figure 4-6 Position of the UPEU

UPEU

l

If no backup UPEU is configured, replacing the UPEU powers off the BBU and disrupts services. Therefore, the UPEU must be replaced within 10 minutes.

Procedure Step 1 Inform the administrator of the M2000 that the UPEU needs to be replaced. If necessary, ask the administrator to back up or transfer the services carried by the module.

Step 2 Power off the BBU by referring to 3.2 Powering Off the BBU. Step 3 Wear the ESD wrist strap or ESD gloves.

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WARNING


Step 4 Remove the module. 1.

Record the connection positions of all the cables connected to the module and then disconnect these cables from the module.

2.

Loosen the two M3 screws on the panel, lift the ejector levers on the faulty module and remove the faulty module from the slot, as shown in Figure 4-7. Figure 4-7 Removing the UPEU

1 2

3.

Put the removed module in an ESD bag.

Step 5 Install the new module. 1.

Insert the new module into the slot of the original faulty module.

2.

Press the ejector levers on the panel of the new module and fasten the screws on both sides of the panel of the new module [torque: 0.6 N.m (5.31 lbf.in.)].

3.

Install the cables according to the recorded installation positions.

Step 6 Power on the BBU by referring to 3.1 Powering On the BBU. Step 7 Determine whether the new UPEU is functional according to the status of the indicators. In the normal state, the RUN indicator of the UPEU is on. NOTE


Step 8 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to confirm that the boards and the module do not generate any alarms.


Postrequisite

4-10

l


l


l

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

Issue 02 (2010-10-22)



4.5 Replacing the UEIU The Universal Environment Interface Unit (UEIU) is the environment interface unit of the BBU3900. The UEIU reports alarms and information of the environment monitoring equipment to the BMPT.

Prerequisite l


l


l


l

Figure 4-8 shows the position of the UEIU in the BBU.

Context

Figure 4-8 Position of the UEIU UEIU

l


l

Replacing the UEIU disrupts the monitoring of external equipment. Therefore, the UEIU must be replaced in five minutes.

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

WARNING


Step 2 Record the connection positions of all the cables connected to the board. Step 3 Disconnect the monitoring cables and alarm cables from the UEIU, as shown in Figure 4-9. Figure 4-9 Removing the cables

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4-11



Step 4 Loosen the two screws on the panel by using the M3 screwdriver and then remove the UEIU, as shown in Figure 4-10. Figure 4-10 Removing the UEIU

1 2

Step 5 Install the new board, fasten the screws on the board [torque: 0.6 N.m (5.31 lbf.in.)], and then install the cables.

Step 6 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to confirm that the board does not generate any alarms.


Postrequisite l


l


l


4.6 Replacing the FAN The FAN module of the BBU is used to cool the BBU3900. The FAN and the air inlet box form an air duct for forcible ventilation and heat dissipation.

Prerequisite l


l

The quantity and models of the modules to be replaced are confirmed.

l


l

Figure 4-11 shows the position of the FAN in the BBU.

Context

4-12


Issue 02 (2010-10-22)



Figure 4-11 Position of the FAN

FAN

l

The FAN is hot-swappable.

l

Replacing the FAN may affect the ventilation and heat dissipation of the BBU and cause an increase in temperature. In this case, an overtemperature alarm may be generated, but services are not affected. Therefore, the replacement must be implemented in three minutes.


CAUTION


Step 2 Loosen the two M3 screws on the panel and then remove the FAN, as shown in Figure 4-12. Figure 4-12 Removing the FAN

1

2

CAUTION

If one or more fans in the FAN are running, do not touch the running fans when removing the FAN.

Step 3 Install the new module, fasten the screws on the new module [torque: 0.6 N.m (5.31 lbf.in.)], and then install the cables. Issue 02 (2010-10-22)


4-13



Step 4 Determine whether the new module is functional according to the status of indicators. In the normal state, the START indicator of the FAN blinks at 0.5 Hz (on for 1s and off for 1s). NOTE


Step 5 Inform the administrator of the M2000 that the replacement is complete and ask t he administrator to confirm that the module does not generate any alarms.


Postrequisite l


l


l


4.7 Replacing the UTRP The Universal Transmission Processing Unit (UTRP) is the extended transmission board of the BBU3900 and provides eight E1/T1 interfaces.

Prerequisite l


l


l


l

Figure 4-13 shows the position of the UTRP in the BBU.

Context

Figure 4-13 Position of the UTRP UTRP UTRP

RUN ALM ACT

E1/T1(0-3)

l

E1/T1(4-7)


Procedure Step 1 Inform the administrator of the M2000 that the UTRP needs to be replaced. If necessary, ask the administrator to back up or transfer the services carried by the board. 4-14


Issue 02 (2010-10-22)




CAUTION


Step 3 Record the connection positions of all the cables connected to the board. Step 4 Disconnect the transmission cable from the UTRP. If the surge protection board is configured, you need to disconnect the surge protection transfer cable, as shown in Figure 4-14. Figure 4-14 Removing the cables

Step 5 Loosen the two M3 screws on the panel and then remove the UTRP, as shown in Figure 4-15.

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4-15



Figure 4-15 Removing the UTRP

1

1

2

Step 6 Ensure that the settings of the DIP switches on the new board are consistent with the settings of the removed board. If necessary, refer to UTRP for the information of the DIP switches.


Step 8 Determine whether the new board is working properly according to the status of indicators. In the normal state, the RUN indicator of the board blinks at 0.5 Hz (on for 1s and off for 1s). NOTE


Step 9 Inform the administrator of the M2000 that the replacement is complete and ask t he administrator to confirm that the board does not generate any alarms.


Postrequisite l

4-16

Put the replaced components into the ESD bag and then put the bag into the cardboard box filled with foam. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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l


l


4.8 Replacing the USCU The Universal Satellite card and Clock Unit (USCU) is the extended satellite card and clock unit of the BBU. The USCU receives the GPS, RGPS, BITS, and M-1PPS clock signals, and receives or transmits 1PPS + TOD clock signals.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, screwdriver, and ESD box or bag.

l


l


l

Figure 4-16 shows the position of the USCU in the BBU.

Context Figure 4-16 Position of the USCU USCU

USCU

GPS

RGPS

l

Y E L O W O U T

G R E E N

RX+RX-TX+TX- 1S+1S-GNDPWR L

M-1PPS

BITS

I N

TOD0

RUN ALM ACT

TOD1



CAUTION


Step 2 Record the connection positions of all the cables connected to the board. Step 3 Disconnect the GPS clock signal cable from the USCU, as shown in Figure 4-17. Figure 4-17 Removing the cable

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4-17



Step 4 Loosen the two M3 screws on the panel and then remove the USCU, as shown in Figure 4-18. Figure 4-18 Removing the USCU

2 1


Step 6 Determine whether the new board functions properly according to the status of the indicators. In the normal state, the RUN indicator of the board blinks at 0.5 Hz (on for 1s and off for 1s). NOTE


Step 7 Inform the administrator of the M2000 that the replacement is complete and ask t he administrator to perform the following operations: 1.

Load and activate the software version of the USCU.

2.

Confirm that the board does not generate any alarms.


Postrequisite l


l


l


4.9 Replacing the Optical Modules The optical module provides an interface for photoelectric conversion, which enables the transmission between the BBU and other equipment through the optical fiber. Replacing the optical modules requires removing the optical fibers. This disrupts the CPRI transmission signal. The procedures of replacing optical modules in different BS equipment are the same. The following section describes how to replace an optical module in the BBU.

Prerequisite l

4-18

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, and ESD box or bag. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Issue 02 (2010-10-22)



l

The quantity and models of the faulty optical modules are confirmed, and new optical modules are ready.

l

Keep the keys ready for use after you gain site admission.

l

Figure 4-19 shows the position of the optical module on the board.

Context

Figure 4-19 Position of the optical module

1

(1) Optical module

l

The optical modules are hot-swappable.

l

You need to disconnect the optical fibers when replacing the faulty optical module. Therefore, services carried on the optical fibers are disrupted during the replacement.

CAUTION

The RRU may restart when you replace the optical module. Do not activate or deactivate the RRU if no antenna or matched load i s connected to the RRU.


CAUTION


Step 2 Prepare optical modules of the same type as the faulty modules according to the labels on the optical modules.

Step 3 Record the positions of the optical modules on the boards. Step 4 Press the latch on the connector of the optical fiber, and then remove the connector from the faulty optical module, as shown in Figure 4-20. Issue 02 (2010-10-22)


4-19



Figure 4-20 Removing the fibers

WARNING

After removing the optical fibers from the optical modules, do not look directly at the optical modules without taking the necessary eye-protection measures.

Step 5 Turn the ring-pull on the faulty optical module outwards. Hold the ring-pull and take the faulty optical module out of the slot to remove it from the BBU, as shown in Figure 4-21. Figure 4-21 Removing the optical module

2

1

Step 6 Install the new optical module to the BBU. Step 7 Remove the dustproof caps from the optical module and the optical fiber connector, and then connect the optical fiber connector to the new optical module.

Step 8 Observe the status of indicators of the boards and determine whether the transmission is normal. NOTE


4-20


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Postrequisite l


l


l


Issue 02 (2010-10-22)


4-21


5

5 Replacing the Components of the RRU3702/RRU3703

Replacing the Components of the RRU3702/ RRU3703

About This Chapter The faulty RRU3702/RRU3703 components must be replaced promptly. The components that can be replaced are the RRU3702/RRU3703 module, and the optical module. 5.1 Replacing the RRU3702/RRU3703 As the remote RF unit of the Huawei WiMAX base station, the RRU3702/RRU3703 works with modules such as the BBU to constitute a distributed base station system. The procedures for replacing the RRU3702 and the RRU3703 are the same. The following section describes how to replace the RRU3702. 5.2 Replacing the Optical Modules The optical module provides an interface for photoelectric conversion, which enables the transmission between the BBU and other equipment through the optical fiber. Replacing the optical modules requires removing the optical fibers. This disrupts the CPRI transmission signal. The procedures of replacing optical modules in different BS equipment are the same. The following section describes how to replace an optical module in the BBU.

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5-1



5.1 Replacing the RRU3702/RRU3703 As the remote RF unit of the Huawei WiMAX base station, the RRU3702/RRU3703 works with modules such as the BBU to constitute a distributed base station system. The procedures for replacing the RRU3702 and the RRU3703 are the same. The following section describes how to replace the RRU3702.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M4 screwdriver, waterproof tape, and insulation tape.

l

The quantity of RRUs to be replaced is confirmed and new RRUs are ready.

l

Replacing the RRU3702/RRU3703 disrupts the services carried by the RRU.

l

If the new RRU3702/RRU3703 and the replaced RRU3702/RRU3703 have the same software version, restoring services takes about 30 minutes after the new RRU3702/ RRU3703 is powered on.

l

If the software of the original RRU3702 is V300R003C00 and it is replaced with an RRU3702 whose software is in an earlier version, the software of the new RRU3702 is automatically upgraded to V300R003C00. In this case, if the transmission rate over the CPRI port of the new RRU3702 is 3.84 Gbit/s, restoring services takes about 35 minutes after the new RRU2702 is powered on. The maximum time for restoring services is about 55 minutes.

l

See DBS3900 WiMAX Reconfiguration Guide to replace RRU3702 with RRU3703.

Context

NOTE

See the DBS3900 WiMAX Quick Installation Guide (RRU3702&RRU3703) to install new RRU3702s or RRU3703s.

Procedure Step 1 Inform the administrator of the M2000 that the RRU needs to be replaced. If necessary, ask the administrator to transfer the services carried by the RRU.

Step 2 Power off the RRU by referring to 3.4 Powering Off the RRU. Step 3 Wear the ESD wrist strap or ESD gloves.

WARNING


Step 4 Use the M4 screwdriver to loosen the six screws on the cover plate of the cabling cavity and then open the cabling cavity of the R RU.

Step 5 Record the connection positions of all the cables connected to the board. 5-2


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Step 6 Disconnect the cables connected to the bottom of the RRU cabling cavity. Step 7 Use the M4 screwdriver to loosen the captive screws on the two spring plates on the main fixture, as shown in Figure 5-1. Figure 5-1 Loosening the screws on the main fixture

Step 8 Use the M4 screwdriver to tighten the two screws on the transfer piece of the RRU [torque: 4.8 N.m (42.48 lbf.in.)], as shown in Figure 5-2. Lift up the screws to loosen the connection between the transfer piece and the main fixture. Then, lift up the RRU to remove it. Figure 5-2 Tightening the screws on the attachment plate

WARNING

Do not lift up the screws by force. You can use a rubber hammer to hit the bottom of the RRU until the connection between the transfer piece and the main fixture is loosened, as shown in Figure 5-3.

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5-3



Figure 5-3 Hitting the RRU

Step 9 Install the new RRU, tighten the captive screws on the two spring plates on the main fixture [torque: 4.8 N.m (42.48 lbf.in.)], and then take waterproof measures.

Step 10 Connect the cables back to the RRU. Step 11 Close the cabling cavity of the RRU and tighten the screws on the cover plate of the cabling cavity [torque: 1.4 N.m (12.39 lbf.in.)].

Step 12 Power on the RRU by referring to 3.3 Powering On the RRU. Step 13 Determine whether the new RRU is functional according to the status of the indicators on the RRU. In the normal state, the RUN indicator of the RRU blinks at 0.5 Hz (on for 1s and off for 1s). NOTE


Step 14 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to confirm that no alarms are generated.

Step 15 Remove the ESD wrist strap or ESD gloves and put the tools away. ----End

Postrequisite

5-4

l

Put the replaced RRU into an ESD bag and then put the bag into a cardboard box filled with foam.

l


l

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

Issue 02 (2010-10-22)




Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, and ESD box or bag.

l


l


l


Context


1

(1) Optical module

l


l


CAUTION


Procedure Step 1 Wear the ESD wrist strap or ESD gloves. Issue 02 (2010-10-22)


5-5



CAUTION



Step 3 Record the positions of the optical modules on the boards. Step 4 Press the latch on the connector of the optical fiber, and then remove the connector from the faulty optical module, as shown in Figure 5-5. Figure 5-5 Removing the fibers

WARNING


Step 5 Turn the ring-pull on the faulty optical module outwards. Hold the ring-pull and take the faulty optical module out of the slot to remove it from the BBU, as shown in Figure 5-6.

5-6


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Figure 5-6 Removing the optical module

2

1





Postrequisite l


l


l


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5-7


6

6 Replacing the Components of the Fan-Cooling RRU3701C

Replacing the Components of the FanCooling RRU3701C

About This Chapter Faulty RRU3701C components must be replaced promptly. The components that can be replaced for the fan-cooling RRU3701C are the RRU3701C module, case, fan subrack, and optical module. 6.1 Replacing the Fan-Cooling RRU3701C If the RRU3701C is faulty, replace the RRU3701C. 6.2 Replacing the RRU3701C Case If the case of the fan-cooling RRU3701C is faulty, replace the case. 6.3 Replacing the Fan Subrack of the RRU3701C If the fan subrack of the RRU3701C is faulty, replace the fan subrack. 6.4 Replacing the Optical Modules The optical module provides an interface for photoelectric conversion, which enables the transmission between the BBU and other equipment through the optical fiber. Replacing the optical modules requires removing the optical fibers. This disrupts the CPRI transmission signal. The procedures of replacing optical modules in different BS equipment are the same. The following section describes how to replace an optical module in the BBU.

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6.1 Replacing the Fan-Cooling RRU3701C If the RRU3701C is faulty, replace the RRU3701C.

Prerequisite l

The quantity and model of the faulty RRU3701Cs are confirmed and the new RRU3701Cs are ready.

l

The installation position of each RRU3701C is recorded.

l

The position of each screw on the RRU3701Cs is recorded.

l

The ports to which all RRU3701C cables are connected are recorded.

l

The sectors of the RRU3701C are deactivated.

l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, Phillips screwdriver, flat-head screwdriver, ESD box or bag, dust free cloth, and key to the cabinet door.

Context As a remote RF unit of the distributed base station, the RRU3701C works with other modules such as the BBU to constitute the DBS3900 base station system. Replacing an RRU3701C disrupts all the services carried by the RRU3701C. It takes about 30 minutes to replace a fan-cooling RRU3701C. In this time, the cables are disconnected from the faulty RRU3701C and then connected to the new RRU3701C, and the services are resumed.

CAUTION l

Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

l

Use an optical fiber clip to remove the connector of the optical fiber on the RRU3701C side. NOTE

See the DBS3900 WiMAX Quick Installation Guide (RRU3701C) to install new RRU3701Cs.

The procedure described here is applicable to replacing RRUs of the same type as the RRU3701C. See DBS3900 WiMAX Reconfiguration Guide to replace RRUs of a different type from the RRU3701C.

Procedure Step 1 Turn off the power switch of the external power supply of the RRU3701C by referring to 3.4 Powering Off the RRU.

Step 2 Open the case of the RRU3701C. 6-2


Issue 02 (2010-10-22)



Step 3 Open the cover of the cabling cavity, disconnect all t he cables from the faulty RRU3701C, and take insulation measures for the cables.

Step 4 Loosen the two captive screws at the bottom of the case. Step 5 Unfasten the tabs on the attachment plates from the anchor slots on the case, and then remove the RRU3701C from the case.

Step 6 Remove the four screws that fasten the upper and lower attachment plates. Step 7 Get the new RRU3701C. Step 8 Use the four screws to fasten the attachment plates to the new RRU3701C. Step 9 Fasten the RRU3701C module onto the case by fitting the tabs on the attachment plate into the anchor slots.

Step 10 Tighten the two captive screws at the bottom of the case. Step 11 Connect all the cables to the new RRU3701C and fix the cover of the cabling cavity. Step 12 Turn on the power switch of the external power supply of the RRU3701C. Then, power on the RRU3701C by referring to 3.3 Powering On the RRU.

Step 13 Lock the door of the RRU3701C case. ----End

Postrequisite Check the following items after replacing the faulty RRU3701C: l

All the cables on the new RRU3701C are correctly connected.

l

Each screw is fastened in the correct position on the new RRU3701C.

l

The new RRU3701C is functional after being powered on and all the services are normal.

l

Check the BIOS version and upgrade the version at the BBU3900 side.

Contact the local Huawei office to handle the faulty RRU3701C.

6.2 Replacing the RRU3701C Case If the case of the fan-cooling RRU3701C is faulty, replace the case.

Prerequisite l

The new RRU3701C case is ready.

l


l

A cross screwdriver and the key to the door of the case are ready.

Context Replacing the case of an RRU3701C may interrupt all the services carried by the RRU3701C. It takes about 20 minutes to replace the RRU3701C case. Issue 02 (2010-10-22)


6-3




Step 2 Open the case of the RRU3701C. Step 3 Open the cover of the cabling cavity, disconnect all t he cables from the faulty RRU3701C, and take insulation measures for the cables.

Step 4 Loosen the two captive screws at the bottom of the case. Step 5 Unfasten the tabs on the attachment plate from the anchor slots on the case, and then remove the RRU3701C from the case.

Step 6 Remove the four screws used for fixing the faulty case, and then remove the faulty case. Step 7 Install the new case by referring to the DBS3900 the DBS3900 WiMAX Quick Installation Guide . Step 8 Fasten the RRU3701C module onto the case by fitting the tabs on the attachment plate into the anchor slots.

Step 9 Tighten the two captive screws at the bottom of the case. Step 10 Connect all the cables to the new RRU3701C and fix the cover of the cabling cavity. Step 11 Turn on the power switch of the external power supply of the RRU3701C. Then, power on the RRU3701C by referring to 3.3 Powering On the RRU.


Postrequisite Check the following items after replacing the faulty RRU3701C case: l

The two tabs at the top of the RRU3701C are fitted into the anchor slots on the case.

l

The four bolts used for fixing the case are tightened.

l

The door of the case is locked.

Contact the local Huawei office to handle the faulty RRU3701C case.

6.3 Replacing the Fan Subrack of the RRU3701C If the fan subrack of the RRU3701C is faulty, replace the fan subrack.

Prerequisite l

The new fan subrack of the RRU3701C rack is ready.

l

The cross screwdriver, ESD wrist strap or gloves, and key to the door of the case are ready.

Context Replacing the fan subrack of an RRU3701C may interrupt all the services carried by the RRU3701C. 6-4


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Step 2 Open the case of the RRU3701C. Step 3 Loosen the captive screws on the cover of the cabling cavity containing the CPRI optical cables and power cables of the fan and remove the cover of the cabling cavity.

Step 4 Disconnect the power cable of the fan subrack in the cabling cavity.

CAUTION

Do not touch the CPRI optical cable when disconnecting the power cable of the fan subrack.

Step 5 Loosen the two captive screws on the panel of the fan subrack. Step 6 Remove the fan subrack from the anchor slots on t he case. Step 7 Slightly push the new fan subrack into the anchor slots and tighten the two captive screws on the panel of the fan subrack.

Step 8 Install the power cable of the fan subrack. Step 9 Fix the cover of the cabling cavity containing the C PRI optical cables and power cables of the fan and tighten the captive screws on the cover of the cabling cavity.

Step 10 Turn on the power switch of the external power supply of the RRU3701C. RRU3701C. Then, power on the RRU3701C by referring to 3.3 Powering On the RRU.


Postrequisite Check the following items after replacing the faulty fan subrack of the RRU3701C: l

The two bolts of the fan subrack are tightened.

l

The fans are working properly.

l

The door of the case is locked.

Contact the local Huawei office to handle the faulty fan subrack of the RRU3701C.

6.4 Replacing the Optical Modules The optical module provides an interface for photoelectric conversion, which enables the transmission between the BBU and other equipment through the optical fiber. Replacing the optical modules requires removing the optical fibers. This disrupts the CPRI transmission signal. The procedures of replacing optical modules in different BS equipment are the same. The following section describes how to replace an optical module in the BBU. Issue 02 (2010-10-22)


6-5



Prerequisite l


l


l


l


Context


1

(1) Optical module

l


l


CAUTION



CAUTION


6-6


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Step 3 Record the positions of the optical modules on the boards. Step 4 Press the latch on the connector of the optical fiber, and then remove the connector from the faulty optical module, as shown in Figure 6-2. Figure 6-2 Removing the fibers

WARNING



2

1

Step 6 Install the new optical module to the BBU. Issue 02 (2010-10-22)


6-7



Step 7 Remove the dustproof caps from the optical module and the optical fiber connector, and then connect the optical fiber connector to the new optical module.




Postrequisite

6-8

l


l


l



Issue 02 (2010-10-22)


7 Replacing the Components of the Natural-Cooling RRU3701C

7

Replacing the Components of the NaturalCooling RRU3701C

About This Chapter Faulty RRU3701C components must be replaced promptly. The components that can be replaced for the natural-cooling RRU3701C are the RRU3701C module, shell, and optical module. 7.1 Replacing the Natural-Cooling RRU3701C If the RRU3701C is faulty, replace the RRU3701C. 7.2 Replacing the Shell of the RRU3701C If the shell of the natural-cooling RRU3701C is faulty, replace the shell. 7.3 Replacing the Optical Modules The optical module provides an interface for photoelectric conversion, which enables the transmission between the BBU and other equipment through the optical fiber. Replacing the optical modules requires removing the optical fibers. This disrupts the CPRI transmission signal. The procedur es of replacing optical modules in different BS equipment are the same. The following section describes how to replace an optical module in the BBU.

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7-1



7.1 Replacing the Natural-Cooling RRU3701C If the RRU3701C is faulty, replace the RRU3701C.

Prerequisite l

The quantity and model of the faulty RRU3701Cs are confirmed and the new RRU3701Cs are ready.

l

The installation position of each RRU3701C is recorded.

l

The position of each screw on the RRU3701Cs is recorded.

l

The ports to which all RRU3701C cables are connected are recorded.

l


l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, Phillips screwdriver, flat-head screwdriver, ESD box or bag, and dust-free cloth.

Context As a remote RF unit of the distributed base station, the RRU3701C works with other modules such as the BBU to constitute the DBS3900 base station system. Replacing an RRU3701C disrupts all the services carried by the RRU3701C. It takes about 30 minutes to replace a natural-cooling RRU3701C. In this time, the cables are disconnected from the faulty RRU3701C and then connected to the new RRU3701C, and the services are resumed.

CAUTION l

Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

l

Use an optical fiber clip to remove the connector of the optical fiber on the RRU3701C side. NOTE

See the DBS3900 WiMAX Quick Installation Guide (RRU3701C) to install new RRU3701Cs.

The procedure described here is applicable to replacing RRUs of the same type as the RRU3701C. See DBS3900 WiMAX Reconfiguration Guide to replace RRUs of a different type from the RRU3701C.


Step 2 Remove the shell by referring to 7.2 Replacing the Shell of the RRU3701C. 7-2


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Step 3 Open the cover of the cabling cavity, disconnect all t he cables from the faulty RRU3701C, and take insulation measures for the cables.

Step 4 Remove the two screws from the installation holes on the lower attachment plate of the RRU3701C.

Step 5 Loosen the screws in the installation holes on the upper attachment plate of the RRU3701C, and remove the RRU3701C.

Step 6 Remove the four screws that fasten the attachment plates. Step 7 Get the new RRU3701C. Step 8 Use the four screws to fasten the attachment plates to the new RRU3701C. Step 9 Align the installation holes of the upper attachment plate to the screws used to fasten the RRU3701C and tighten the screws.

Step 10 Fix the two screws into the installation holes on the lower attachment plate of the RR U3701C to install the RRU3701C.

Step 11 Connect all the cables to the new RRU3701C and fix the cover of the cabling cavity. Step 12 Turn on the power switch of the external power supply of the RRU3701C. Then, power on the RRU3701C by referring to 3.3 Powering On the RRU.

Step 13 Align the shell of the RRU3701C to the positioning holes on the attachment plates of the RRU3701C and fit the tabs on the shell into the anchor slots of the attachment plates.

Step 14 Tighten the two captive screws at the bottom of the shell of the RRU3701C to fix the shell. Step 15 Lift the sliding blades on the right of the RRU3701C shell to secure the RF jumper. Hold the sliding blades and tighten the captive screws of the blades. ----End

Postrequisite Check the following items after replacing the faulty RRU3701C: l

All the cables on the new RRU3701C are correctly connected.

l

Each screw is fastened in the correct position on the new RRU3701C.

l

The new RRU3701C is functional after being powered on and all the services are normal.

l

Check the BIOS version and upgrade the version at the BBU3900 side.

Contact the local Huawei office to handle the faulty RRU3701C.

7.2 Replacing the Shell of the RRU3701C If the shell of the natural-cooling RRU3701C is faulty, replace the shell.

Prerequisite l

The new RRU3701C shell is ready.

l

A cross screwdriver is ready.

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7-3



Context It takes about 5 minutes to replace the RRU3701C shell. Replacing the RRU3701C shell does not affect the ongoing services.

Procedure Step 1 Loosen the captive screws of the sliding blades on the right of the RRU3701C shell and press down the sliding blades.

Step 2 Loosen the two captive screws at the bottom of the RRU3701C shell. Step 3 Pull the shell outward slightly to take the bottom of the shell away from the installation parts and then lift the shell higher to remove the tabs from the anchor slots on the attachment plate.

Step 4 Remove the faulty shell. Step 5 Align the new shell of the RRU3701C to the positioning holes on the attachment plates of the RRU3701C and fit the tabs on the shell into the anchor slots of the attachment plates.

Step 6 Tighten the two captive screws at the bottom of the shell of the RRU3701C to fix the shell. Step 7 Lift up the sliding blades on the right of the RRU3701C shell to secure the RF jumper. Hold the sliding blades and tighten the captive screws of the blades. ----End

Postrequisite Check the following items after replacing the faulty RRU3701C shell: l

The two tabs at the top of the RRU3701C shell are fitted into the anchor slots on the attachment plate.

l

The two captive screws at the bottom of the RRU3701C shell are tightened.

Contact the local Huawei office to handle the faulty RRU3701C shell.


Prerequisite

7-4

l


l


l

Keep the keys ready for use after you gain site admission. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Issue 02 (2010-10-22)



Context l

Figure 7-1 shows the position of the optical module on the board. Figure 7-1 Position of the optical module

1

(1) Optical module

l


l


CAUTION



CAUTION



Step 3 Record the positions of the optical modules on the boards. Step 4 Press the latch on the connector of the optical fiber, and then remove the connector from the faulty optical module, as shown in Figure 7-2.

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7-5



Figure 7-2 Removing the fibers

WARNING



2

1




7-6


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Postrequisite l


l


l


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7-7


8


Replacing the Components in the OMB

About This Chapter This section describes how to replace the HEUA board, AC/DC power cable, DCDU, and the AC surge protection box in the OMB. 8.1 Replacing the HEUA The Heat Exchange Unit Type A (HEUA) is a fan monitoring board. It distributes power to the FAN, monitors the running status of the FAN, collects the cabinet alarm information, and reports it to the host. 8.2 Replacing the AC/DC Power Equipment The AC/DC power equipment is applicable to the AC cabinet and converts 220 V AC input to -48 V DC output. 8.3 Replacing the DCDU The DCDU is the DC power distribution unit. Replacing the DCDU cuts off the power supply to the site and therefore disrupts the services. 8.4 Replacing the AC Surge Protection Box The AC surge protection box protects the input power supply from surge.

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8-1



8.1 Replacing the HEUA The Heat Exchange Unit Type A (HEUA) is a fan monitoring board. It distributes power to the FAN, monitors the running status of the FAN, collects the cabinet alarm information, and reports it to the host.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves and the M3 screwdriver.

l

The quantity and models of HEUAs to be replaced are confirmed and new HEUAs are ready.

l


Context Figure 8-1 shows the position of the HEUA in the OMB. Figure 8-1 Position of HEUA

HEUA


8-2


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CAUTION


Step 2 Record the connection positions of all the cables connected to the HEUA. Step 3 Remove the power cables and monitoring cables connected to the HEUA, as shown in Figure 8-2. Figure 8-2 Removing the cables

Step 4 Loosen the four M3 screws on the panel and then remove the HEUA, as shown in Figure 8-3. Figure 8-3 Removing the HEUA



Postrequisite l


l


l


Issue 02 (2010-10-22)


8-3



8.2 Replacing the AC/DC Power Equipment The AC/DC power equipment is applicable to the AC cabinet and converts 220 V AC input to -48 V DC output.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M3 screwdriver, and M6 screwdriver.

l

The quantity and models of the modules to be replaced are confirmed and new modules are ready.

l


l

The AC/DC power equipment consists of the PDU, PSU, PMU, and equipment subrack. When a component of the AC/DC power equipment is confirmed to be faulty, replace the faulty component. When the entire AC/DC power equipment is confirmed to be faulty, replace the entire AC/DC power equipment.

l

Figure 8-4 shows the position of the AC/DC power equipment in the cabinet.

Context

Figure 8-4 Position of the AC/DC power equipment in the cabinet

1

(1) AC/DC power equipment

l

8-4

Figure 8-5 shows the positions of components of the AC/DC power equipment. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Issue 02 (2010-10-22)



Figure 8-5 Positions of the components

4 3

2

1

(1) PDU

l

(2) PSU

(3) PMU

(4) Equipment subrack

Replacing the AC/DC power equipment, PSU, PDU, or the equipment subrack disrupts all the services carried by the BS. Therefore, the AC/DC power equipment, PSU, PDU, or the equipment subrack must be replaced within 20 minutes.

Procedure Step 1 Power off the AC/DC power equipment. Step 2 Wear the ESD wrist strap or ESD gloves.

CAUTION


Step 3 Record the connection positions of all the cables connected to the components to be replaced. Step 4 Disconnect the cables. 1.

Disconnect the DC output cables from the PDU, as shown in Figure 8-6. Figure 8-6 Disconnecting cables from the PDU

Issue 02 (2010-10-22)


8-5


2.


Disconnect the monitoring signal cables from the PMU, as shown in Figure 8-7. Figure 8-7 Disconnecting cables from the PMU

3.

Disconnect the AC input cables and DC output cables from the equipment subrack, as shown in Figure 8-8. Figure 8-8 Disconnecting cables from the equipment subrack

Step 5 Remove the components to be replaced. 1.

8-6

Loosen the M3 screw on the panel of the PDU and remove the PDU, as shown in Figure 8-9.


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Figure 8-9 Removing the PDU

1

2

2.

Loosen the M3 screw on the panel of the PSU and remove the PSU, as shown in Figure 8-10. Figure 8-10 Removing the PSU

1

2

3.

Issue 02 (2010-10-22)

Loosen the M3 screw on the panel of the PMU and remove the PMU, as shown in Figure 8-11.


8-7



Figure 8-11 Removing the PMU

1 2

4.

Loosen the four M6 screws on the mounting ears of the equipment subrack and remove the equipment subrack, as shown in Figure 8-12. Figure 8-12 Removing the equipment subrack

NOTE

8-8

l

When the equipment subrack is confirmed to be faulty, remove the PDU, PSU, and PMU first and then remove the equipment subrack from the cabinet.

l

When the entire AC/DC power equipment is confirmed to be faulty, remove the entire AC/DC power equipment from the cabinet for replacement.


Issue 02 (2010-10-22)



Step 6 If the PMU is to be replaced, set the DIP switches of the new PMU according to the positions of the DIP switches of the faulty PMU.

Step 7 Install the new components. 1.

Install the AC/DC power equipment or the equipment subrack, fasten the bolts on the mounting ears, and install the cables.

2.

Install the PDU, PSU, or PMU, fasten the screws on the panel [torque: 0.55 N.m (4.87 lbf.in.)], and then install the cables.

Step 8 Determine whether the new AC/DC power equipment functions properly according to the indicators on the AC/DC power equipment, BBU, and RRU. NOTE

For the descriptions of the indicators on the AC/DC power equipment, BBU, and RRU, see relevant hardware descriptions.

Step 9 Power on the AC/DC power equipment. Step 10 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite l


l


l


8.3 Replacing the DCDU The DCDU is the DC power distribution unit. Replacing the DCDU cuts off the power supply to the site and therefore disrupts the services.

Prerequisite l


l

The quantity and models of the modules to be replaced are confirmed and new modules are ready.

l


l

Figure 8-13 shows the position of the DCDU in the OMB.

Context

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8-9



Figure 8-13 Position of the DCDU

DCDU

l

Replacing the DCDU disrupts all the services carried by the BS. Therefore, the DCDU must be replaced within 20 minutes.

Procedure Step 1 Power off the DCDU. Step 2 Wear the ESD wrist strap or ESD gloves.

CAUTION


Step 3 Record the connection positions of all the cables connected to the DCDU. Step 4 Remove the power cables connected to the DCDU, as shown in Figure 8-14.

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Figure 8-14 Removing the cables

Step 5 Loosen the four M6 screws on the panel and then remove the DCDU, as shown in Figure 8-15. Figure 8-15 Removing the DCDU

Step 6 Install the new board, fasten the screws on the board [torque: 2 N.m (17.70 lbf.in.)], and then install the cables.

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8-11



Step 7 Power on the DCDU. Step 8 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite l


l


l


8.4 Replacing the AC Surge Protection Box The AC surge protection box protects the input power supply from surge.

Prerequisite l


l

The quantity and models of the surge protection boxes to be replaced are confirmed and new surge protection boxes are ready.

l


l

Figure 8-16 shows the position of the surge protection box in the OMB.

Context Figure 8-16 Position of the AC surge protection box

1

(1) AC surge protection box

8-12


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l


Replacing the AC surge protection box disrupts the surge protection function of the BS. Therefore, the AC surge protection box must be replaced within 10 minutes.

Procedure Step 1 Power off the BS. Step 2 Wear the ESD wrist strap or ESD gloves.

CAUTION


Step 3 Record the connection positions of all the cables connected to the AC surge protection box. Step 4 Remove the monitoring cables and alarm cables from the AC surge protection box, as shown i n Figure 8-17. Figure 8-17 Removing the cables

Step 5 Loosen the screws on the panel by using the M4 screwdriver and then remove the AC surge protection box, as shown in Figure 8-18.

Issue 02 (2010-10-22)


8-13



Figure 8-18 Removing the AC surge protection box

Step 6 Install the new AC surge protection box, fasten the screws on the box [torque: 1.2 N.m (10.62 lbf.in.)], and then install the cables.

Step 7 Power on the BS. Step 8 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite

8-14

l


l


l



Issue 02 (2010-10-22)


9

9 Replacing the Components of the SLPU

Replacing the Components of the SLPU

About This Chapter During maintenance of the SLPU, the components to be replaced include the SLPU case and the UELP board. 9.1 Replacing the SLPU Case The Signal Lightning Protection Unit (SLPU) provides surge protection for a BS. 9.2 Replacing the UELP The Universal E1/T1 Lightning Protection Unit (UELP) provides lightning protection for four E1/T1 links.

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9-1



9.1 Replacing the SLPU Case The Signal Lightning Protection Unit (SLPU) provides surge protection for a BS.

Prerequisite l

The model of the faulty SLPU case is confirmed and the new SLPU case is ready.

l

Ensure that the new SLPU case is intact and has the same version as the faulty one.

l

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

Context

CAUTION

Do not replace and install inst all the SLPU SLPU case during a thunderstorm.

Procedure Step 1 Inform the administrator of the M2000 that the SLPU case needs to be replaced. If necessary, ask the administrator to back up or transfer the services carried by the boards in the SLPU case.


WARNING


Step 3 Record the connection positions of all the cables connected to the boards. Step 4 Remove the transmission cables connected to the boards in the SLPU case. Step 5 Loosen the four M6 screws on the panel of the SLPU case and then remove the SLPU case, as shown in Figure 9-1. Figure 9-1 Removing the SLPU

9-2


Issue 02 (2010-10-22)



Step 6 Remove all the boards in the faulty SLPU case, install the boards to the new SLPU case, and then install filler panels to the idle slots.

Step 7 Install the new case, fasten the screws on the case [torque: 2 N.m (5.31 lbf.in.)], and then install the cables.

Step 8 Inform the administrator of the M2000 that the hardware replacement is complete and ask the administrator to confirm that no related alarms are generated.


Postrequisite After replacing the SLPU case, perform the following steps: l


l


l


9.2 Replacing the UELP The Universal E1/T1 Lightning Protection Unit (UELP) provides lightning protection for four E1/T1 links.

Prerequisite l


l


l


l

Figure 9-2 shows the position of the UELP in the BBU.

Context

Figure 9-2 Position of the UELP

l

Issue 02 (2010-10-22)



9-3



CAUTION

Do not replace and install the UELP during a thunderstorm.


CAUTION


Step 2 Record the connection positions of all the cables connected to the board. Step 3 Disconnect the transmission cable connected to the UELP, as shown in Figure 9-3. Figure 9-3 Removing the cable

Step 4 Loosen the two M3 screws on the panel and then remove the UELP, as shown in Figure 9-4. Figure 9-4 Removing the UELP

1

1

2

Step 5 Ensure that the settings of the DIP switches on the new board are consistent with the settings of the removed board. If necessary, refer to UELP for the information of the DIP switches.

Step 6 Install the new board, fasten the screws on the board [torque: 0.6 N.m (5.31 lbf.in.)], and then install the cables. 9-4


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Step 7 Inform the administrator of the M2000 that the replacement is complete and ask t he administrator to load and activate the software version of the UELP.


Postrequisite l


l


l


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9-5


10

10 Replacing the Surge Protector for the Antenna System

Replacing the Surge Protector for the Antenna System

When the surge protector for the antenna system at the BBU side is faulty, you need to replace it.

Prerequisite l

A new surge protector is ready.

l

The required tools are ready. The tools are Phillips screwdriver, ESD wrist strap or gloves, and ESD box or bag.

Context Replacing the surge protector takes about five minutes, which does not affect the system.

Procedure Step 1 Remove the faulty surge protector. 1.

Remove the GPS clock signal cables and feeders connected to the faulty surge protector.

2.

Remove the PGND cables connected to the faulty surge protector.

3.

Put the faulty surge protector into the ESD bag.

Step 2 Install a new surge protector. 1.

Connect the PGND cables to the surge protector.

2.

Connect the GPS clock signal cables and feeders to the surge protector.

3.

Take waterproofing measures if the outdoor surge protector is provided.

CAUTION

Do not replace and install the surge protector in a thunderstorm. ----End Issue 02 (2010-10-22)


10-1

10 Replacing the Surge Protector for the Antenna System


Result Verification After replacing the faulty GPS surge protector, check that: l

The surge protector is correctly grounded.

l

The cable connectors on the two ends of the surge protector are tightened.

Contact the local Huawei office to handle the faulty surge protector.

10-2


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11 Replacing the Cables of the DBS3900

11

Replacing the Cables of the DBS3900

About This Chapter When the DBS3900 cables are faulty, you need to replace them promptly. The cables can be replaced are: transmission cables, signal cables, and RF jumpers.

Context NOTE

Contact Huawei engineers in the following situations: l

You decide to arrange for devices, cables, and connectors by yourself.

l

You need to cut the cable in specified length.

11.1 Replacing the BBU Power Cables The BBU power cable provides -48 V DC power input to the BBU. 11.2 Replacing the Dry Contact Alarm Cables The dry contact alarm cable transmits external Boolean value alarm signals to the BBU. 11.3 Replacing the GPS Clock Signal Cables The GPS clock signal cable is connected to the GPS antenna system to receive GPS signals. The received GPS signals can be used as the clock reference for the BBU. 11.4 Replacing the Monitoring Signal Cables The monitoring signal cables are used to transmit the alarm signals from external monitoring equipment. The replaceable monitoring signal cables are the CMUA-BBU monitoring signal cable and the EMUA monitoring signal cable. 11.5 Replacing E1/T1 Signal Cables of the BBU3900 The E1/T1 signal cables are used to connect the BBU and external transmission equipment and to transmit baseband signals. 11.6 Replacing the E1/T1 Surge Protection Transfer Cable The E1/T1 surge protection transfer cable connects the UTRP and the UELP, and protects the E1/T1 signals from surge. 11.7 Replacing FE/GE Ethernet Cables of the BBU3900 The FE/GE Ethernet cables are used to connect the BBU3900 and ASN-GW through the router. 11.8 Replacing FE/GE Optical Fibers of the BBU3900 Issue 02 (2010-10-22)


11-1



The FE/GE optical fibers are used to transmit the optical signals between the BBU and the ASNGW. 11.9 Replacing CPRI Optical Fibers The Common Public Radio Interface (CPRI) optical fibers are used to connect the BBU3900 and the RRU and to transmit digital signals. 11.10 Replacing the RRU Power Cables The RRU power cable feeds external -48 V DC power to the RRU. 11.11 Replacing the AISG Multicore Cable of the RRU3702/RRU3703 The AISG multicore cable connects the RRU and the remote control unit (RCU) and transmits control signals from the BS to the RET antenna. 11.12 Replacing the AISG Extension Cable of the RRU3702/RRU3703 When the distance between the RRU and the RCU is longer than 5 m, you need to connect an AISG extension cable to the AISG multicore cable to extend the length. 11.13 Replacing the RF Jumpers of the RRU3702/RRU3703 The RF jumpers of the RRU are used to input and output RF signals. The procedures of replacing the RF jumpers of the RRU3702 and the RRU3703 are the same. 11.14 Replacing the RF Jumper of the RRU3701C The RF jumper of the RRU is used to input and output RF signals.

11-2


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11.1 Replacing the BBU Power Cables The BBU power cable provides -48 V DC power input to the BBU.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M3 Phillips screwdriver, cable cutter, and power cable crimping tool.

l

The quantity and models of the cables to be replaced are confirmed.

l


Context Replacing the BBU power cable disrupts the services provided by the BBU.

Procedure Step 1 Prepare the new power cable of the same length as the faulty power cable to be replaced. Step 2 Wear the ESD wrist strap or ESD gloves.

WARNING


Step 3 Power off the BBU by referring to 3.2 Powering Off the BBU. Step 4 Use a Phillips screwdriver to loosen the screws of the faulty 3V3 connector, and then remove the connector from the BBU panel.

Step 5 Connect the 3V3 connector on one end of the new power cable to the power port on the BBU panel, and then use a Phillips screwdriver to tighten the screws.

Step 6 Route the new power cable to the external power supply along the path of the faulty cable. Step 7 Strip the sheath and shielding layer at the ends of the new power cable and make OT terminals. Step 8 Take away the faulty power cable. Install the power cable. Step 9 Power on the BBU by referring to Powering On the BBU. Step 10 Determine whether the boards function properly according to the status of the indicators. For description of the indicators, see DBS3900 WiMAX Hardware Description.

Step 11 Remove the ESD wrist strap or gloves and put the tools away. ----End Issue 02 (2010-10-22)


11-3



Postrequisite l

Put the replaced cables in an ESD bag.

l

Fill the fault card to record the i nformation of the replaced cables.

l

Contact the local Huawei office to handle the faulty cables.

11.2 Replacing the Dry Contact Alarm Cables The dry contact alarm cable transmits external Boolean value alarm signals to the BBU.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M3 Phillips screwdriver, cable cutter, and crimping tool.

l


l


Context Replacing the dry contact alarm cable disrupts the monitoring of external equipment but does not affect services.


WARNING


Step 2 Mark the position of the cable to be replaced. Attach a replacement label close to the installation position to avoid incorrect operations.

Step 3 Prepare a terminal for one end of the new dry contact alarm cable and connect the terminal to the external alarm equipment.

Step 4 Disconnect one end of the faulty dry contact alarm cable from the BBU and the other end from the external alarm equipment.

Step 5 Route the new dry contact alarm cable along the path of the faulty dry contact alarm cable. Step 6 Check whether the new dry contact alarm cable functions properly. Step 7 Remove the ESD wrist strap or gloves and put the tools away. ----End

11-4


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Postrequisite l


l


l


11.3 Replacing the GPS Clock Signal Cables The GPS clock signal cable is connected to the GPS antenna system to receive GPS signals. The received GPS signals can be used as the clock reference for the BBU.

Prerequisite l

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

l


l


Context Replacing the GPS clock signal cable disrupts the clock signals.


WARNING


Step 2 Mark the installation position of the cable to be replaced. Attach a replacement label close to the installation position to avoid incorrect operations.

Step 3 Disconnect the faulty clock signal cable. Step 4 Route the new clock signal cable along the path of the faulty clock signal cable. Step 5 Ensure that the new clock signal cable functions properly. Step 6 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite l


l


l


Issue 02 (2010-10-22)


11-5



11.4 Replacing the Monitoring Signal Cables The monitoring signal cables are used to transmit the alarm signals from external monitoring equipment. The replaceable monitoring signal cables are the CMUA-BBU monitoring signal cable and the EMUA monitoring signal cable. 11.4.1 Replacing the CMUA-BBU Monitoring Signal Cable The CMUA-BBU monitoring signal cable connects the CMUA in the APM cabinet and the BBU, and reports the monitoring signals collected by the CMUA to the BBU. 11.4.2 Replacing the EMUA Monitoring Signal Cable The EMUA monitoring signal cable connects the BBU3900 and the EMUA or the EMU, and reports the alarms from environment monitoring equipment.

11.4.1 Replacing the CMUA-BBU Monitoring Signal Cable The CMUA-BBU monitoring signal cable connects the CMUA in the APM cabinet and the BBU, and reports the monitoring signals collected by the CMUA to the BBU.

Prerequisite l


l


l



WARNING



Step 3 Disconnect the faulty CMUA-BBU monitoring signal cable. Step 4 Route the new CMUA-BBU monitoring signal cable along the path of the faulty CMUA-BBU monitoring signal cable.

Step 5 Ensure that the new CMUA-BBU monitoring signal cable functions properly. Step 6 Remove the ESD wrist strap or gloves and put the tools away. ----End 11-6


Issue 02 (2010-10-22)



Postrequisite l


l


l


11.4.2 Replacing the EMUA Monitoring Signal Cable The EMUA monitoring signal cable connects the BBU3900 and the EMUA or the EMU, and reports the alarms from environment monitoring equipment.

Prerequisite l


l


l



WARNING



Step 3 Disconnect the faulty EMUA monitoring signal cable. Step 4 Route the new EMUA monitoring signal cable along the path of the faulty EMUA monitoring signal cable.

Step 5 Ensure that the new EMUA monitoring signal cable functions properly. Step 6 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite l


l


l


Issue 02 (2010-10-22)


11-7



11.5 Replacing E1/T1 Signal Cables of the BBU3900 The E1/T1 signal cables are used to connect the BBU and external transmission equipment and to transmit baseband signals.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M3 Phillips screwdriver, cable cutter, crimping pliers, and ESD box or bag.

l


l


Context Replacing the E1/T1 signal cables disrupts the services provided by the BBU.


CAUTION


Step 2 Route the new E1/T1 signal cables to the device at the peer end along the path of the faulty cables.

Step 3 Remove the DB26 male connectors of the faulty E1/T1 signal cables from E1/T1 ports and the other ends of the E1/T1 signal cables from the peer equipment.

Step 4 Put the faulty E1/T1 signal cables in an ESD bag. Step 5 Connect the DB26 male connectors of the new E1/T1 signal cables to E1/T1 ports and the other ends of the E1/T1 signal cables to the peer equipment.

Step 6 Arrange and bind the new E1/T1 signal cables. ----End

Postrequisite

11-8

l


l


l



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11.6 Replacing the E1/T1 Surge Protection Transfer Cable The E1/T1 surge protection transfer cable connects the UTRP and the UELP, and protects the E1/T1 signals from surge.

Prerequisite l


l


l


Context

CAUTION

Do not replace and install the surge protection transfer cable during a thunderstorm.


WARNING



Step 3 Disconnect the E1/T1 surge protection transfer cable. Step 4 Route the new E1/T1 surge protection transfer cable along the path of the faulty E1/T1 surge protection transfer cable.

Step 5 Ensure that the new E1/T1 surge protection transfer cable functions properly. Step 6 Remove the ESD wrist strap or gloves and put the tools away. ----End

Postrequisite l


l


l


Issue 02 (2010-10-22)


11-9



11.7 Replacing FE/GE Ethernet Cables of the BBU3900 The FE/GE Ethernet cables are used to connect the BBU3900 and ASN-GW through the router.

Prerequisite l


l


l


Context Replacing the Ethernet cable disrupts the services provided by the BBU.


CAUTION


Step 2 Route the new Ethernet cable to the peer device along the path of the faulty cable. Step 3 Remove the RJ45 connector of the faulty Ethernet cable from the GE port of the BBU and disconnect the other end of the Ethernet cable from the peer device or switch.

Step 4 Put the faulty Ethernet cable in an ESD bag. Step 5 Connect the RJ45 connector of the new Ethernet cable to the GE port of the BBU and connect the other end of the Ethernet cable to the peer equipment or switch.

Step 6 Arrange and bind the new Ethernet cables. ----End

Postrequisite l


l


l


11.8 Replacing FE/GE Optical Fibers of the BBU3900 The FE/GE optical fibers are used to transmit the optical signals between the BBU and the ASNGW. 11-10


Issue 02 (2010-10-22)



Prerequisite l


l

The quantity and models of the fibers to be replaced are confirmed.

l


Context Replacing the FE/GE optical fiber disrupts the services provided by the BBU.


CAUTION


Step 2 Route the new FE/GE optical fiber to the peer device along the path of the faulty fiber. Step 3 Press the latch on the LC connector of the faulty optical fiber, and then remove the LC connector from the optical module. Remove the other connector from the peer device.

Step 4 Put the faulty FE/GE optical fiber in an ESD box. Step 5 Plug the LC connector of the new optical fiber i nto the same optical module according to the label on the optical fiber. Install the other connector on the peer device.

Step 6 Arrange and bind the new optical fibers. ----End

Postrequisite l

Put the replaced fibers in an ESD bag.

l

Fill the fault card to record the i nformation of the replaced fibers.

l

Contact the local Huawei office to handle the faulty fibers.

11.9 Replacing CPRI Optical Fibers The Common Public Radio Interface (CPRI) optical fibers are used to connect the BBU3900 and the RRU and to transmit digital signals.

Prerequisite l

Issue 02 (2010-10-22)

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, M3 Phillips screwdriver, cable cutter, crimping pliers, and ESD box or bag. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

11-11



l

The quantity and models of the fibers to be replaced are confirmed.

l


Context Replacing the CPRI optical fiber disrupts the services carried by the optical fiber.


CAUTION


Step 2 Route the new CPRI optical fiber to the peer device along the path of the faulty fiber. NOTE

When routing the optical fiber, place the end of the fiber with longer exposed part on the BBU side, protect the exposed part with a winding tube, and place the other end on the RRU side.

Step 3 Press the latches on the connectors of the faulty optical fiber connected to t he BBU and RRU, and then pull the connectors out of the optical modules.

Step 4 Put the faulty optical fiber into an ESD box. Step 5 Insert the connectors of the new optical fiber into the optical modules according to the labels on the optical fiber.

Step 6 Arrange and bind the new optical fibers. ----End

Postrequisite l

Put the replaced fibers in an ESD bag.

l

Fill the fault card to record the i nformation of the replaced fibers.

l

Contact the local Huawei office to handle the faulty fibers.

11.10 Replacing the RRU Power Cables The RRU power cable feeds external -48 V DC power to the RRU.

Prerequisite

11-12

l


l


l

Keep the keys ready for use after you obtain site admission. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Issue 02 (2010-10-22)



Context The wires at the two ends of the RRU3701C/RRU3702 power cable are exposed. Prepare OT terminals on site for one end of the power cable and connect the terminals to the power port in the RRU cabling cavity. The other end is connected to the power supply system at the installation site according to the onsite condition. At one end of the RRU3703 power cable are two female FA (field assembled) connectors and the other end of the power cable are exposed wires which are connected to the power supply system at the installation site according to the onsite condition. NOTE

Prepare cable connectors by referring to the Quick Installation Guide

Replacing the RRU power cable disrupts the services provided by the RRU.

Procedure Step 1 Prepare the new power cable of the same length as the faulty power cable to be replaced, and make corresponding cable connectors.


WARNING


Step 3 Power off the RRU by referring to 3.4 Powering Off the RRU. Step 4 Disconnect the faulty power cable. If...

Then...

RRU3701C/RRU3702 power cable Use the Phillips screwdriver to loosen the screw on the connector of the faulty power cable and remove the cable from the power port on the RRU panel. Disconnect the other end of the power cable from the onsite power supply system. RRU3703 power cable

Remove the female FA connectors from the power port on the RRU panel and disconnect the other end of the power cable from the onsite power supply system.

Step 5 Route the new power cable to the external power supply along the path of the faulty cable and then install the new power cable.

Issue 02 (2010-10-22)


11-13



If...

Then...

RRU3701C/RRU3702 power cable Connect the OT terminal to the power port in the RRU cabling cavity, and press the shielding layer of the power cable under the spring plate at the cable outlet to ensure the grounding of the cable. Connect the other end to the power supply system according to the onsite condition. RRU3703 power cable

Connect the female FA connector of the blue wire to the NEG (-) 0 port in the RRU cabling cavity and the female FA connector of the black wire to the RTN (+) 0 port in the RRU cabling cavity. The other end of the power cable is connected to power supply system at the installation site according to the onsite condition.

Step 6 Power on the RRU by referring to 3.3 Powering On the RRU. Step 7 Determine whether the equipment functions properly according to the status of the indicators. For description of the indicators, see DBS3900 WiMAX Hardware Description.


Postrequisite l


l


l


11.11 Replacing the AISG Multicore Cable of the RRU3702/ RRU3703 The AISG multicore cable connects the RRU and the remote control unit (RCU) and transmits control signals from the BS to the RET antenna.

Prerequisite l


l


l



11-14


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WARNING


Step 2 Disconnect the AISG multicore cable of the RRU3702/RRU3703. Step 3 Install the new AISG multicore cable of the RRU3702/RRU3703. Step 4 Determine whether the boards function properly according to the status of the indicators. For description of the indicators, see DBS3900 WiMAX Hardware Description.


Postrequisite l


l


l


11.12 Replacing the AISG Extension Cable of the RRU3702/ RRU3703 When the distance between the RRU and the RCU is longer than 5 m, you need to connect an AISG extension cable to the AISG multicore cable to extend the length.

Prerequisite l


l


l



WARNING


Step 2 Disconnect the AISG extension cable of the RRU3702/RRU3703. Step 3 Install the new AISG extension cable of the RRU3702/RRU3703. Issue 02 (2010-10-22)


11-15



Step 4 Determine whether the boards function properly according to the status of the indicators. For description of the indicators, see DBS3900 WiMAX Hardware Description.


Postrequisite l


l


l


11.13 Replacing the RF Jumpers of the RRU3702/RRU3703 The RF jumpers of the RRU are used to input and output RF signals. The procedures of replacing the RF jumpers of the RRU3702 and the RRU3703 are the same.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, screwdriver, cable cutter, crimping pliers, waterproof tape, insulation tape, feeder cable cutting tool, and ESD box or bag.

l

The quantity and models of the jumpers to be replaced are confirmed.

l


Context Powering off the RRU before replacing the RRU RF jumper disrupts all the services carried by the sector carriers associated with the RRU. NOTE

See the DBS3900 WiMAX Quick Installation Guide (RRU3702&RRU3703) to install new RRU RF jumpers.


CAUTION


Step 2 Turn off the switch of the external power supply to the RRU. Step 3 Remove the waterproof insulation tapes on RF ports of the RRU and of the antenna system. Step 4 Remove the faulty RF jumpers from the RF port of the RRU. 11-16


Issue 02 (2010-10-22)



Step 5 Remove the faulty RF jumpers from the RF ports of the antenna system. Step 6 Connect the connector of the new RF jumper to the RF port on the RRU. Step 7 Wrap the joints at the RRU RF ports with a layer of insulation tape. Wind the tape around the joint from top down.

Step 8 Wrap the insulation tape with three layers of waterproof tape. NOTE

The tape is wrapped in the following sequence: from top down, from bottom up, and then from top down. For every two adjacent tape layers, the tape on the upper layer overlaps about half the width of the tape on the lower layer.

Step 9 Wrap the waterproof tape with three layers of insulation tape. For details about how to wrap the insulation tape, see Step 8.

Step 10 Mount the matched load on the idle RF port. Use the waterproof insulation tape and PVC tape to wrap the joint between the matched load and the RF port in the same way as described in the previous steps.

Step 11 Connect the RF jumpers to the antenna system. Step 12 Wrap the joint at the RF ports of the antenna system with the waterproof insulation tape. Step 13 Stick the color rings. The new color rings should have the same color as the color rings on the old RF jumpers.

Step 14 Turn on the switch of the external power supply to the RRU. ----End

Postrequisite l

Put the replaced jumpers in an ESD bag.

l

Fill the fault card to record the i nformation of the replaced jumpers.

l

Contact the local Huawei office to handle the faulty jumpers.

11.14 Replacing the RF Jumper of the RRU3701C The RF jumper of the RRU is used to input and output RF signals.

Prerequisite l

The required tools and materials are ready. The tools and materials are the ESD wrist strap or ESD gloves, screwdriver, cable cutter, crimping pliers, waterproof tape, insulation tape, feeder cable cutting tool, and ESD box or bag.

l


l


Context Replacing the RF jumper of the RRU3701C disrupts all the services carried by the sectors related to the RRU3701C. Issue 02 (2010-10-22)


11-17



NOTE

See the DBS3900 WiMAX Quick Installation Guide (RRU3701C) to install new RRU3701C RF jumpers.


CAUTION


Step 2 Turn off the switch of the external power supply to the RRU3701C. Step 3 Open the door of the RRU3701C case or dismantle the RRU3701C shell. Step 4 Remove the waterproof tape at the RF ports of t he RRU3701C and the antenna system. Step 5 Remove the faulty RF jumper from the RF port of the RRU3701C. Step 6 Remove the faulty RF jumper from the RF port of the antenna system. Step 7 Connect the connector of the new RF jumper to the RF port of the RRU3701C. Step 8 Wrap the joint of the RF port of the RRU3701C with the waterproof insulation tape. NOTE

Wrap the joint spirally upward, downward, and then upward again. That is, the joint is wrapped by three layers of waterproof insulation tape. For every two adjacent tape layers, the tape on the upper layer overlaps about half the width of the tape on the lower layer.

Step 9 Wrap up the waterproof insulation tape with the PVC tape in the same way. Step 10 Mount the 50-ohm matched load on the idle RF port. Use the waterproof insulation tape and PVC tape to wrap the joint between the matched load and the RF port in the same way as described in the previous steps.

Step 11 Connect the RF jumper to the antenna system. Step 12 Wrap the joint at the RF ports of the antenna system with the waterproof insulation tape. Step 13 Stick the color rings. The new color rings should have the same color as the color rings on the old RF jumpers.

Step 14 Turn on the switch of the external power supply to the RRU3701C. Step 15 Lock the door of the RRU3701C case or reinstall the RRU3701C shell after ensuring that the RRU3701C is operational. ----End

Postrequisite

11-18

l


l

Fill the fault card to record the i nformation of the replaced cables. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Issue 02 (2010-10-22)

DBS3900 WiMAX Site Maintenance Guide(V300R003C00_02)

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