Huawei PRRU3901 Users Guide

LampSite

Site Maintenance Guide

Issue 02

Date 2014-05-27

HUAWEI TECHNOLOGIES CO., LTD.

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

Trademarks and Permissions

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

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

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a 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: support@huawei.com

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LampSite Site Maintenance Guide

Overview

This document describes routine maintenance items for a RHUB3908 and pRRU3901, such as equipment maintenance, and power-on and power-off operations. It also explains how to replace the components and modules.

About This Document

Product Version

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

Product Name Product Version

RHUB3908 (referred to as RHUB in this document)

pRRU3901 (referred to as pRRU in this document)

Intended Audience

This document is intended for:

l System engineers

l Site maintenance engineers

V100R009C00 and later versions

Single-mode versions mapping V100R009C00:

l NodeB: V200R016C00

l eNodeB: V100R007C00

Organization

1 Changes in LampSite Site Maintenance Guide

This chapter provides information about the changes in different document versions of LampSite Site Maintenance Guide.

2 RHUB Maintenance Items

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LampSite Site Maintenance Guide

This chapter describes the RHUB maintenance items, involving the equipment room, equipment, power system, and grounding system.

3 pRRU Maintenance Items

This chapter describes the pRRU maintenance items, involving equipment and power system.

4 Powering On and Powering Off the RHUB

After the RHUB is powered on, check the indicator status. Power off the RHUB in normal or emergency mode as required.

5 Powering On and Powering Off the pRRU

After the pRRU is powered on, check the power supply voltage and indicator status. Power off the pRRU based on the power supply mode.

6 Replacing the RHUB

The RHUB is an indoor convergence unit. It converges multiple pRRUs to the BBU. Replacing the RHUB interrupts services carried on the serving cell.

About This Document

7 Replacing an Optical Module

An optical module provides a port for opto-electronic conversion. This enables the transmission between the RHUB and BBU through the optical fiber. Replacing the optical module requires removing the optical fibers. This interrupts all the services.

8 Replacing the RF Daughter Board

This section describes the procedures for replacing the RF daughter board of the pRRU. A pRRU can have two transmission ports or three transmission ports, requiring the same installation operations. This section uses the pRRU with three transmission ports as an example. Replacing an RF daughter board interrupts all the services carried on the pRRU.

9 Replacing the Wi-Fi Daughter Board

This section describes the procedures for replacing the Wi-Fi daughter board, which applies only to a pRRU with three transmission ports.Replacing an Wi-Fi daughter board interrupts all the services carried on the pRRU.

10 Replacing the pDock Mother Board

This section describes the procedure for replacing the pDock mother board. Replacing the pDock mother board of a pRRU will interrupt all services carried on the pRRU. A pDock mother board can have two transmission ports or three transmission ports, requiring the same installation operations. This section uses the pDock mother board with three transmission ports as an example.

Conventions

Symbol Conventions

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

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LampSite Site Maintenance Guide About This Document

Symbol Description

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results.

NOTICE is used to address practices not related to personal injury.

Calls attention to important information, best practices and tips.

NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration.

General Conventions

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

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New

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

Command Conventions

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

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

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LampSite Site Maintenance Guide

About This Document

Convention Description

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

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

vertical bars. One item is selected.

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

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

{ x | y | ... }

*

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

[ x | y | ... ]

*

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

GUI Conventions

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

Convention Description

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

are in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder.

Keyboard Operations

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

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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LampSite Site Maintenance Guide About This Document

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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LampSite Site Maintenance Guide Contents

LampSite Site Maintenance Guide 1 Changes in LampSite Site Maintenance Guide

1 Changes in LampSite Site Maintenance

Guide

This chapter provides information about the changes in different document versions of LampSite Site Maintenance Guide.

02 (2014-05-27)

01 (2014-04-26)

This is the second commercial release.

Compared with 01 (2014-04-26), no information is added.

Compared with 01 (2014-04-26), this issue incorporates the following change:

Content Change Description

Entire document Added the descriptions about the LTE FDD

+LTE FDD mode.

Compared with 01 (2014-04-26), no information is deleted.

This is the first commercial release.

Compared with Draft C (2014-03-26), no information is added.

Compared with Draft C (2014-03-26), this issue incorporates the following change:

Content Change Description

Entire document Changed the pRRU name from pRRU with

two Ethernet ports to pRRU with two transmission ports, and pRRU with three Ethernet ports to pRRU with three transmission ports.

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LampSite Site Maintenance Guide 1 Changes in LampSite Site Maintenance Guide

Content Change Description

10 Replacing the pDock Mother Board Changed the pDock name from pDock with

two Ethernet ports to pDock with two transmission ports, and pDock with three Ethernet ports to pDock with three transmission ports.

Compared with Draft C (2014-03-26), this issue excludes the following topic:

l Replacing a PSU

Draft C (2014-03-26)

This is a draft release.

Compared with Draft B (2014-02-28), no information is added.

Compared with Draft B (2014-02-28), this issue incorporates the following change:

Content Change Description

6 Replacing the RHUB Deleted the operation of resetting the RHUB

Compared with Draft B (2014-02-28), no information is deleted.

Draft B (2014-02-28)

This is a draft release.

Compared with draft A (2013-11-30), this issue includes the following new topic:

l 9 Replacing the Wi-Fi Daughter Board

Compared with draft A (2013-11-30), this issue incorporates the following changes:

Content Change Description

Entire document Added descriptions about pRRUs with three

after replacing.

transmission ports. Such pRRUs support integrated Wi-Fi services.

Added the descriptions about the UMTS, LTE FDD and UMTS+LTE FDD mode.

About This Document Optimized descriptions about matching

product versions.

8 Replacing the RF Daughter Board Added the procedures for removing and

attaching labels.

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LampSite Site Maintenance Guide 1 Changes in LampSite Site Maintenance Guide

Content Change Description

9 Replacing the Wi-Fi Daughter Board

Compared with draft A (2013-11-30), this issue excludes the following topic:

l Replacing the pRRU

Draft A (2013-11-30)

This is a draft release.

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LampSite Site Maintenance Guide 2 RHUB Maintenance Items

2 RHUB Maintenance Items

This chapter describes the RHUB maintenance items, involving the equipment room, equipment, power system, and grounding system.

Equipment Room Maintenance Items

Table 2-1 lists the equipment room maintenance items.

Table 2-1 Equipment room maintenance items

Item Check Frequency Operation Reference

Standard

Environment alarms in the equipment room

Temperature in the equipment room

Humidity in the equipment room

Lighting system in the equipment room

Daily Check whether any

power alarm, fire alarm, or smoke alarm is reported.

Each time maintenance is performed

Every other month Check whether the

Record temperatures in the equipment room measured by a thermometer.

Record humidity in the equipment room measured by a hygrometer.

routine lighting system and emergency lighting system are running properly.

No power alarm, fire alarm, or smoke alarm is reported.

-5°C to 45°C

5%RH to 95%RH

-

Air conditioner Every other month Check whether the

air conditioner is running properly.

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LampSite Site Maintenance Guide 2 RHUB Maintenance Items

Item Check Frequency Operation Reference

Standard

Disaster protection devices

Cleanness

Every one month Check whether the

disaster protection, equipment protection, and firefighting devices are normal.

Every one month Check whether the

cabinet, equipment housing, equipment interior, desktop, floor, door, and window are clean and tidy.

l The equipment

room is equipped with portable foam-type extinguishers, and the pressure and expiration date must be checked.

l The equipment

room has no mice, ants, flying insects, or other risks.

All these items are clean and tidy.

Equipment Maintenance Items

Table 2-2 lists the equipment maintenance items.

Table 2-2 Equipment maintenance items

Item Check Frequency Operation Reference

Fan in the PSU Monthly or quarterly Check whether the

Equipment surface Monthly or quarterly Check whether the

Equipment cleanness Monthly or quarterly Check whether the

fan is working properly.

equipment surface is intact.

equipment is clean.

Standard

The fan works properly without any abnormal smell or sound.

The equipment surface is intact and the label of the cabinet is legible.

The equipment surface is clean.

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LampSite Site Maintenance Guide 2 RHUB Maintenance Items

Item Check Frequency Operation Reference

Standard

Indicators Monthly or quarterly Check whether the

indicators on the equipment are working properly.

Electrostatic discharge (ESD) wrist strap

Quarterly Check the ESD wrist

strap in either of the following ways:

l Use an ESD wrist

strap tester to check the ESD wrist strap.

l Use a multimeter

to test the ground resistance of the ESD wrist strap.

Maintenance Items for the Power System and Grounding System

For details about the indicator status, see RHUB Ports and Indicators in

LampSite Hardware Description.

If you use an ESD wrist strap tester, the GOOD indicator is on. If you use a multimeter, the ground resistance of the ESD wrist strap ranges from 0.75 ohms to 10 ohms.

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

Table 2-3 Maintenance items for the power system and grounding system

Item Check Frequency Operation Reference

Standard

Power cables Monthly or quarterly Check the power

cable connections.

Voltage Monthly or quarterly Use a multimeter to

measure the voltage of the power supply.

PGND cables Monthly or quarterly Checks whether the

PGND cables and ground bar are securely connected.

The power cables are securely connected and not deteriorating. The joints are not corroded.

The voltage is in the permissible range.

The joints are secure and not corroded. The PGND cables and ground bar are not deteriorated and are protected from corrosion.

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LampSite Site Maintenance Guide 2 RHUB Maintenance Items

Item Check Frequency Operation Reference

Standard

Ground resistance Monthly or quarterly Use a ground

resistance tester to measure the ground resistance and record the measurement result.

The ground resistance is equal to or less than 10 ohms.

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LampSite Site Maintenance Guide

This chapter describes the pRRU maintenance items, involving equipment and power system.

Equipment Maintenance Items

3 pRRU Maintenance Items

Table 3-1 lists the equipment maintenance items for the pRRU.

Table 3-1 Equipment maintenance items

Item Check Frequency Operation Reference

Standard

Equipment surface Monthly or quarterly Check whether the

equipment surface is intact.

Equipment cleanness Monthly or quarterly Check whether the

equipment is clean.

Indicators Monthly or quarterly Check whether the

indicators on the equipment are working properly.

The equipment surface is intact and the label of the cabinet is legible.

The equipment surface is clean.

For details about the indicator status, see pRRU Ports and Indicators in

LampSite Hardware Description.

Power System Maintenance Items

Table 3-2 lists the power system maintenance items for the pRRU.

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LampSite Site Maintenance Guide 3 pRRU Maintenance Items

Table 3-2 Power system maintenance items

Item Check Frequency Operation Reference

Standard

Power cables Monthly or quarterly Check the power

cable connections.

Voltage Monthly or quarterly Use a multimeter to

measure the voltage of the power supply.

The power cables are securely connected and not deteriorating. The joints are not corroded.

The voltage is in the permissible range.

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LampSite Site Maintenance Guide 4 Powering On and Powering Off the RHUB

4 Powering On and Powering Off the RHUB

About This Chapter

After the RHUB is powered on, check the indicator status. Power off the RHUB in normal or emergency mode as required.

4.1 Powering On the RHUB

The RHUB is powered by AC input.

4.2 Powering Off the RHUB

An RHUB can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios.

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LampSite Site Maintenance Guide

4.1 Powering On the RHUB

The RHUB is powered by AC input.

Prerequisites

The power cable of the RHUB is not connected to power, that is, the power plug is removed.

Context

NOTICE

The RHUB must be powered on within 7 days after it is unpacked, and the period of its poweroff state cannot exceed 7 days during maintenance.

4 Powering On and Powering Off the RHUB

Procedure

Step 1 Insert the power plug to power on the RHUB.

Step 2 Wait 3 to 5 minutes. Then check the status of the RUN indicator.

If the RUN Indicator Is... It Indicates that... Then...

Steady on There is power input, but the

board is faulty.

Steady off There is no power input, or an

alarm about the board is reported.

1s on and 1s off The RHUB is running

properly.

0.125s on and 0.125s off The board software is being loaded.

Disable the power supply, rectify the board fault, and then power on the RHUB again.

Disable the power supply and check the power input again. If the power input is normal, rectify the board fault, and then power on the RHUB again.

End the power-on check task.

If the loading is not complete after 5 minutes, disable the power supply and check whether the data in the configuration file is correct. Rectify the fault and then power on the RHUB again.

----End

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LampSite Site Maintenance Guide 4 Powering On and Powering Off the RHUB

4.2 Powering Off the RHUB

An RHUB can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios.

Procedure

l Normal power-off

NOTICE

Powering off the RHUB interrupts services, and therefore perform associated operations before a power-off.

1. Remove the power plug to disconnect the RHUB with the external power input.

2. If the RHUB is equipped with an external power device, turn off the switch of the external power device.

l Emergency power-off

1. Turn off the switch of the external power device.

----End

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LampSite Site Maintenance Guide 5 Powering On and Powering Off the pRRU

5 Powering On and Powering Off the pRRU

About This Chapter

After the pRRU is powered on, check the power supply voltage and indicator status. Power off the pRRU based on the power supply mode.

5.1 Powering On the pRRU

After the pRRU is powered on, check its running status by observing the indicator status.

5.2 Powering Off the pRRU

A pRRU can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios.

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LampSite Site Maintenance Guide

5.1 Powering On the pRRU

After the pRRU is powered on, check its running status by observing the indicator status.

Prerequisites

The pRRU and the cables are correctly installed.

Context

NOTICE

The pRRU must be powered on within 7 days after it is unpacked, and the period of its poweroff state cannot exceed 7 days during maintenance.

5 Powering On and Powering Off the pRRU

Procedure

Step 1 Power on the pRRU.

Step 2 Optional: Check the power supply status for the pRRU. This operation is required when AC/

The pRRU can be powered in either of the following modes, which cannot be used at the same time. It is recommended that you use power over Ethernet (PoE) power supply.

l The RHUB adopts the PoE power supply to provide power for the pRRU over the CPRI_E0

port.

l The pRRU can also be powered by the AC/DC adapter connecting to the local AC power

module.

NOTICE

If PoE is used and AC/DC adapter is connected to the AC power module, the pRRU automatically uses AC/DC adapter to obtain power supply. Note that the pRRU will be powered off and then powered on again if you pull the plug of the AC/DC adapter power cable to use the PoE for power supply.

DC power adapter is used.

If... Then...

The input voltage of the pRRU AC/DC adapter ranges from 100 V AC to 240 V AC

Step 3 Wait 3 to 5 minutes. Then Check the status of the RUN indicator.

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Go to Step 3. Otherwise, replace it. When the input voltage is within the permissible range, go to Step 3.

14

LampSite Site Maintenance Guide

5 Powering On and Powering Off the pRRU

If the RUN Indicator Is... It Indicates that... Then...

Steady on There is power input, but the

board is faulty.

Steady off There is no power input. Disable the power supply and

On for 1s and off for 1s The pRRU is running

properly.

On for 0.125s and off for

0.125s

----End

The board software is being loaded.

Disable the power supply, rectify the board fault, and then power on the pRRU again.

check the power input again.

End the power-on check task.

If the loading is not complete after 5 minutes, disable the power supply. Check whether the data in the configuration file is correct. Rectify the fault and then power on the pRRU again.

5.2 Powering Off the pRRU

A pRRU can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios.

Procedure

l Normal power-off

NOTICE

Powering off the pRRU interrupts services, and therefore perform associated operations before a power-off.

– If the pRRU is powered in PoE mode, remove the Ethernet cable.

– If the pRRU is powered by an AC/DC adapter, disconnect the power cable of the AC/

DC adapter.

l Emergency power-off

1. Turn off the switch of the external power device.

----End

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LampSite Site Maintenance Guide

The RHUB is an indoor convergence unit. It converges multiple pRRUs to the BBU. Replacing the RHUB interrupts services carried on the serving cell.

Prerequisites

6 Replacing the RHUB

Context

Procedure

l A new RHUB is available.

l The labels and connections of the cables connected to the RHUB are recorded.

l The following tools are available: a Phillips screwdriver, an ESD wrist strap, and a rubber

mallet.

It takes about 10 minutes to replace the RHUB.

l Replace the RHUB installed on a 19-inch rack, in a 19-inch cabinet or in a 19-Inch Shelf.

NOTE

The procedures for replacing the RHUB installed on a 19-inch rack are the same for replacing the RHUB installed in a 19-inch cabinet or in a 19-Inch Shelf. The following uses the RHUB installed on a 19-inch rack as an example.

1. Power off the RHUB by referring to 4.2 Powering Off the RHUB.

2. Record the cable connections.

3. Take insulation measures, and then remove all cables from the RHUB.

4. Use a torque screwdriver or Phillips screwdriver to remove the four screws on the mounting ear of the RHUB, as shown in Figure 6-1.

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LampSite Site Maintenance Guide

6 Replacing the RHUB

Figure 6-1 Removing the mounting ear

5. Remove the RHUB from the rack.

6. Install the new RHUB. For details, see LampSite Installation Guide.

NOTICE

Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components.

7. Connect all the cables to the new RHUB according to the recorded installations.

8. Power on the RHUB by referring to 4.1 Powering On the RHUB.

9. Determine whether the new RHUB is working properly according to the indicator status on the RHUB. For details about the indicator status, see RHUB Ports and Indicators in LampSite Hardware Description.

10. Instruct the network operator to run the RST BRD command to reset the RHUB. No further action is required.

l Replace the RHUB installed on a wall.

1. Power off the RHUB by referring to 4.2 Powering Off the RHUB.

2. Record the cable connections.

3. Take insulation measures, and then remove all cables from the RHUB.

4. Use a torque wrench or socket wrench to remove the four expansion bolts on the mounting ear, and then remove the RHUB, as shown in Figure 6-2.

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LampSite Site Maintenance Guide

6 Replacing the RHUB

Figure 6-2 Removing the mounting ear

5. Install the new RHUB on a wall. For details, see LampSite Installation Guide.

NOTICE

Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components.

6. Connect all the cables to the new RHUB according to the recorded installations.

7. Power on the RHUB by referring to 4.1 Powering On the RHUB.

8. Determine whether the new RHUB is working properly according to the indicator status on the RHUB. For details about the indicator status, see RHUB Ports and Indicators in LampSite Hardware Description.

9. Instruct the network operator to run the RST BRD command to reset the RHUB. No further action is required.

----End

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LampSite Site Maintenance Guide 6 Replacing the RHUB

Follow-up Procedure

l Place the replaced RHUB into an ESD box or bag. Then, place the ESD box or bag into a

foam-padded carton or the packing box of the new optical module.

l Record the information about the faulty component in the fault card.

l Contact the local Huawei office to deal with the faulty component.

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LampSite Site Maintenance Guide

An optical module provides a port for opto-electronic conversion. This enables the transmission between the RHUB and BBU through the optical fiber. Replacing the optical module requires removing the optical fibers. This interrupts all the services.

7 Replacing an Optical Module

Prerequisites

Context

l The number and type of faulty optical modules are confirmed, and new optical modules

are available.

l The new optical modules to be installed must match CPRI rates.

l The position for installing an optical module and the cable connection are recorded.

l The following tools and materials are available: an ESD wrist strap or ESD gloves, and an

ESD box or bag.

l The optical modules are connected to the CPRI0 and CPRI1 ports on the RHUB panel.

l An optical module or CPRI fiber optic cable cannot be inserted into or removed from this

CPRI port when the power supply is connected.

l Replacing an optical module involves removing an optical fiber and the faulty optical

module, installing a new optical module, connecting the optical fiber to the optical module, and recovering the links. The operation takes about 10 minutes.

NOTICE

Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components.

Procedure

Step 1 Wear ESD gloves.

Step 2 Record the optical module and fiber connections.

Step 3 Power off the RHUB according to the instructions in 4.2 Powering Off the RHUB.

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LampSite Site Maintenance Guide

After removing the optical fiber from the optical module, do not look directly at the optical modules without eye protection.

Step 4 Press the latch on the connector of the optical fiber connector, and remove the connector from

the faulty optical module, use the dust-proof cap to protect the optical fiber, as shown in Figure

7-1.

Figure 7-1 Removing the optical fiber

7 Replacing an Optical Module

CAUTION

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 CPRI0 or CPRI1 port.

Step 6 Connect a new optical module to the corresponding CPRI port, as shown in Figure 7-2.

Figure 7-2 Removing the optical module

Step 7 Remove the dust-proof caps from the optical module and optical fiber, and connect the optical

fiber connector to the new optical module.

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LampSite Site Maintenance Guide 7 Replacing an Optical Module

Step 8 Power on the RRU according to the instructions in 4.1 Powering On the RHUB.

Step 9 Check whether CPRI signal transmission recovers by observing the CPRI indicator on the RHUB

panel.

If... Then...

The CPRI indicator is green CPRI signal transmission recovers and the

optical fiber replacement is successful.

The CPRI indicator is red or in another color CPRI signal transmission is abnormal. Check

whether the optical fiber and optical module are securely installed.

Step 10 Take off the ESD gloves and pack up all the tools.

----End

Follow-up Procedure

l Place the replaced optical module into an ESD box or bag. Then, place the ESD box or bag

into a foam-padded carton or the packing box of the new optical module.

l Record the information about the faulty component in the fault card.

l Contact the local Huawei office to deal with the faulty component.

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LampSite Site Maintenance Guide

This section describes the procedures for replacing the RF daughter board of the pRRU. A pRRU can have two transmission ports or three transmission ports, requiring the same installation operations. This section uses the pRRU with three transmission ports as an example. Replacing an RF daughter board interrupts all the services carried on the pRRU.

8 Replacing the RF Daughter Board

Prerequisites

Context

The replacement takes approximately 5 minutes.

The preferred slot for an RF daughter board depends on the mode of the RF daughter board.

Figure 8-1 shows the slot for installing the RF daughter boards.

Figure 8-1 Slot for installing the RF daughter boards

NOTE

l Unless otherwise specified, LTE mode in this document refers to LTE TDD and LTE FDD.

l The procedures for replacing an RF daughter board in different slots on the pRRU are the same. The

following section uses the procedures for replacing an RF daughter board in slot S1 as an example.

Procedure

Step 1 Instruct the network operator to block the pRRU.

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LampSite Site Maintenance Guide 8 Replacing the RF Daughter Board

l On the UMTS side, log in to the LMT and run the BLK BRD command to block the RF

daughter board.

l On the LTE side, log in to the LMT and run the BLK BRD command to block the RF daughter

board.

CAUTION

A pRRU that has just been powered off has afterheat. Take scald-proof measures when removing the modules.

Step 2 Power off the pRRU by referring to 5.2 Powering Off the pRRU.

Step 3 Wear ESD gloves.

NOTICE

Take proper ESD protection measures. For example, wear ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components.

Step 4 Use the M4 Phillips screwdriver to loosen the Phillips screw on the pRRU housing. Wrench and

remove the housing from the installation position of the Phillips screw hole, as shown in Figure

8-2.

Figure 8-2 Removing the pRRU housing

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LampSite Site Maintenance Guide

Step 5 Remove the RF daughter board installed in slot S1.

Hold the RF daughter board tightly when pulling the handle to prevent the RF daughter board from falling.

1. Use the M4 Phillips screwdriver to loosen the Phillips screws on the RF daughter board in

8 Replacing the RF Daughter Board

NOTE

l The pRRU housing and the RF daughter board can be secured using either Phillips screws or protection

screws, requiring the same installation operations. This section uses Phillips screws as an example to describe the installation operations.

l Keep the Phillips screw secure for future use.

NOTICE

slot S1, as shown in Figure 8-3.

Figure 8-3 Loosen the Phillips screws

2. Use the left hand to hold the RF daughter board and the right hand to hold the right handle of the RF daughter board to remove the RF daughter board and put it into an ESD box or bag, as shown in Figure 8-4.

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LampSite Site Maintenance Guide

Figure 8-4 Removing the RF daughter board installed in slot S1

8 Replacing the RF Daughter Board

Step 6 Install a new RF daughter board in slot S1.

Level the handles of an RF daughter board of the required mode, and insert the handles separately in the two dowels of slot S1, and use the M4 Phillips screwdriver to tighten the Phillips screws on the RF daughter board with a torque of 1.4 N•m, as shown in Figure 8-5.

Figure 8-5 Installing the RF daughter board in slot S1

Step 7 Remove the SN label and mode label on the surface of the RF daughter board, as shown in

Figure 8-6.

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LampSite Site Maintenance Guide 8 Replacing the RF Daughter Board

Figure 8-6 Removing the SN label and mode label

Step 8 Attach the removed SN label to the corresponding position for S1 label on the nameplate side

of the pRRU housing, as shown in Figure 8-7.

NOTE

l If an SN label has been attached to the position for S1 label, remove this label first.

l The RF daughter board replacement described herein does not involve any mode change. Therefore,

the removed mode label can be discarded

Figure 8-7 Attaching the SN label

Step 9 Close the pRRU housing and tamp each side of the housing until a click is heard. Ensure that

the groove gaps between the front and back housings are evenly distributed. Use the M4 Phillips screwdriver to tighten the Phillips screw on the housing with a torque of 1.4 N•m, as shown in

Figure 8-8.

Figure 8-8 Installing the pRRU housing

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LampSite Site Maintenance Guide 8 Replacing the RF Daughter Board

NOTE

The Phillips screw is the one removed and kept in Step 4.

Step 10 Power on the pRRU by referring to 5.1 Powering On the pRRU.

Step 11 Instruct the network operator to unblock the pRRU.

l On the UMTS side, log in to the NodeB LMT and run the UBL BRD command to unblock

the RF daughter board of the pRRU.

l On the LTE side, log in to the eNodeB LMT and run the UBL BRD command to unblock

the RF daughter board of the pRRU.

Step 12 Take off the ESD gloves and pack up all the tools.

----End

Follow-up Procedure

l Place the replaced RF daughter board into an ESD box or bag. Then, place the ESD box or

bag into a foam-padded carton or the packing box of the new optical module.

l Record the information about the faulty component in the fault card.

l Contact the local Huawei office to deal with the faulty component.

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LampSite Site Maintenance Guide

9 Replacing the Wi-Fi Daughter Board

This section describes the procedures for replacing the Wi-Fi daughter board, which applies only to a pRRU with three transmission ports.Replacing an Wi-Fi daughter board interrupts all the services carried on the pRRU.

9 Replacing the Wi-Fi Daughter Board

Prerequisites

Context

Procedure

The replacement takes approximately 5 minutes.

On a pRRU with three transmission ports, a Wi-Fi daughter board can be installed only in slot S3, as shown in Figure 9-1.

Figure 9-1 Slot for installing the Wi-Fi daughter board

Step 1 Instruct the network operator to block the pRRU.

l On the UMTS side, log in to the LMT and run the BLK BRD command to block the RF

daughter board.

l On the LTE side, log in to the LMT and run the BLK BRD command to block the RF daughter

board.

Step 2 Ask the AC administrator to change on the AC the MAC address of the corresponding Wi-Fi

daughter board.

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LampSite Site Maintenance Guide

A pRRU that has just been powered off has afterheat. Take scald-proof measures when removing the Wi-Fi daughter board.

Step 3 Power off the pRRU by referring to 5.2 Powering Off the pRRU.

Step 4 Wear ESD gloves.

Take proper ESD protection measures. For example, wear ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components.

Step 5 Use the M4 Phillips screwdriver to loosen the Phillips screw on the pRRU housing. Wrench and

remove the housing from the installation position of the Phillips screw hole, as shown in Figure

9-2.

9 Replacing the Wi-Fi Daughter Board

CAUTION

NOTICE

Figure 9-2 Removing the pRRU housing

NOTE

l The pRRU housing and the Wi-Fi daughter board can be secured using Phillips screws or protection

screws, requiring the same installation operations. This section uses Phillips screws as an example.

l Keep the protection screw secure for future use.

Step 6 Remove the Wi-Fi daughter board installed in slot S1.

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LampSite Site Maintenance Guide 9 Replacing the Wi-Fi Daughter Board

NOTICE

Hold the Wi-Fi daughter board tightly when pulling the handle to prevent the Wi-Fi daughter board from falling.

1. Use the M4 Phillips screwdriver to loosen the Phillips screws on the Wi-Fi daughter board in slot S3, as shown in Figure 9-3.

Figure 9-3 Loosen the four fastening screws

2. Use the left hand to hold the Wi-Fi daughter board and the right hand to hold the right handle of the Wi-Fi daughter board to remove the Wi-Fi daughter board and put it into an ESD box or bag, as shown in Figure 9-4.

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Figure 9-4 Removing the Wi-Fi daughter board installed in slot S3

9 Replacing the Wi-Fi Daughter Board

Step 7 Install a new Wi-Fi daughter board in slot S3.

Level the handles of a Wi-Fi daughter board of the required mode, and insert the handles separately in the two dowels of slot S3, and use the M4 Phillips screwdriver to tighten the Phillips screws on the Wi-Fi daughter board with a torque of 1.4 N•m, as shown in Figure 9-5.

Figure 9-5 Installing the Wi-Fi daughter board in slot S1

Step 8 Remove the SN label and WIFI MAC labels on the surface of the Wi-Fi daughter board, as

shown in Figure 9-6. Keep the labels secure.

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LampSite Site Maintenance Guide 9 Replacing the Wi-Fi Daughter Board

Figure 9-6 Removing the SN label and WIFI MAC labels

Step 9 Attach one WIFI MAC label to MAC Collection Template and report the WIFI MAC

information to the commissioning personnel.

Step 10 Attach the removed SN label to the corresponding position for S3 label on the nameplate side

of the pRRU housing and the other WIFI MAC label to a position (for the label of slot S3 on the side of the pRRU housing) between antenna ports ANT4 and ANT5, as shown in Figure

9-7.

NOTE

If an SN label has been attached to the position for S3 label, remove this label first.

Figure 9-7 Attaching the SN label and WIFI MAC label

Step 11 Close the pRRU housing and tamp each side of the housing until a click is heard. Ensure that

the groove gaps between the front and back housings are evenly distributed. Use the M4 Phillips screwdriver to tighten the Phillips screw on the housing with a torque of 1.4 N•m, as shown in

Figure 9-8.

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LampSite Site Maintenance Guide 9 Replacing the Wi-Fi Daughter Board

Figure 9-8 Installing the pRRU housing

NOTE

The Phillips screw is the one removed and kept in Step 5.

Step 12 Power on the pRRU by referring to 5.1 Powering On the pRRU.

Step 13 Instruct the network operator to unblock the pRRU.

l On the UMTS side, log in to the NodeB LMT and run the UBL BRD command to unblock

the RF daughter board of the pRRU.

l On the LTE side, log in to the eNodeB LMT and run the UBL BRD command to unblock

the RF daughter board of the pRRU.

Step 14 Take off the ESD gloves and pack up all the tools.

----End

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LampSite Site Maintenance Guide

10 Replacing the pDock Mother Board

This section describes the procedure for replacing the pDock mother board. Replacing the pDock mother board of a pRRU will interrupt all services carried on the pRRU. A pDock mother board can have two transmission ports or three transmission ports, requiring the same installation operations. This section uses the pDock mother board with three transmission ports as an example.

10 Replacing the pDock Mother Board

Prerequisites

Procedure

Step 1 Instruct the network operator to block the pRRU.

Step 2 Power off the pRRU by referring to 5.2 Powering Off the pRRU.

Step 3 Put on ESD gloves.

The process takes approximately 20 minutes.

l On the UMTS side, log in to the LMT and run the BLK BRD command to block the RF

daughter board.

l On the LTE side, log in to the LMT and run the BLK BRD command to block the RF daughter

board.

CAUTION

A pRRU that has just been powered off is till very hot on the surface. Take scald-proof measures when removing the modules.

NOTICE

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

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LampSite Site Maintenance Guide

Step 4 Record connection positions of all pRRU cables, and then remove the cables.

Step 5 Removing the pRRU. Hold the pRRU case in one hand and pull the hoist clamp on the mounting

bracket with the other hand, as shown in step a in Figure 10-1. Then, remove the mounting bracket from the pRRU, as shown in step b in Figure 10-1.

Figure 10-1 Removing the pRRU

10 Replacing the pDock Mother Board

Step 6 Optional: Remove the rubber plug from the Ethernet port, as shown in Figure 10-2.

Figure 10-2 Removing the rubber plug from the Ethernet port

Step 7 Remove the four rubber plugs from holes of the installation support, as shown in Figure 10-3.

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LampSite Site Maintenance Guide 10 Replacing the pDock Mother Board

Figure 10-3 Removing rubber plugs from the installation support

Step 8 Use an M4 Phillips screwdriver to loosen the Phillips screws for the installation support, and

remove the support, as shown in Figure 10-4.

Figure 10-4 Removing the installation support

Step 9 Use an M4 Phillips screwdriver to loosen the Phillips screw on the pRRU housing, and remove

the housing, as shown in Figure 10-5.

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LampSite Site Maintenance Guide

Figure 10-5 Removing the pRRU housing

10 Replacing the pDock Mother Board

NOTE

l The pRRU housing and the RF daughter board can be secured using either Phillips screws or protection

screws, requiring the same installation operations. This section uses Phillips screws as an example to describe the installation operations.

l Keep the Phillips screw secure for future use.

Step 10 Record positions of the RF daughter boards on the pRRU mother board, as shown in Figure

10-6. The following section assumes that the pRRU has two RF daughter boards.

Figure 10-6 Recording the installation positions of RF daughter boards

Step 11 Remove the RF daughter board in slot S1 and that in slot S2 in the same way.

NOTICE

Hold the RF daughter board tightly when pulling the handle to prevent the RF daughter board from falling.

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LampSite Site Maintenance Guide

1. Use an M4 Phillips screwdriver to loosen the Phillips screws on the RF daughter board, as

10 Replacing the pDock Mother Board

shown in Figure 10-7.

Figure 10-7 Removing Phillips screws

2. Hold the RF daughter board with one hand and pull its handle with another hand to remove the board, and place the board in an ESD bag, as shown in Figure 10-8.

Figure 10-8 Removing the RF daughter board in slot1 and slot2

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LampSite Site Maintenance Guide

Step 12 Use an M3 Phillips screwdriver to loosen the two fastening screws of the light pipe, and remove

the light pipe, as shown in Figure 10-9.

Figure 10-9 Removing the light pipe

Step 13 Use the M3 Phillips screwdriver to loosen the four fastening screws of the pDock mother board,

and remove the pDock mother board, as shown in Figure 10-10.

10 Replacing the pDock Mother Board

Figure 10-10 Removing the pDock mother board

Step 14 Install a new pDock mother board, and use the M3 Phillips screwdriver to tighten the four

fastening screws to 0.8 N•m, as shown in Figure 10-11.

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LampSite Site Maintenance Guide

Figure 10-11 Installing a new pDock mother board

10 Replacing the pDock Mother Board

Step 15 Install the light pipe, and use the M3 Phillips screwdriver to tighten the two fastening screws to

0.8 N•m, as shown in Figure 10-12.

Figure 10-12 Installing the light pipe

Step 16 Install the RF daughter boards in slots S1 and S2, and use the M4 Phillips screwdriver to tighten

the two fastening screws always carried on each daughter board to 1.4 N•m, as shown in Figure

10-13.

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LampSite Site Maintenance Guide 10 Replacing the pDock Mother Board

Figure 10-13 Installing the RF daughter boards

NOTICE

The installation positions of the RF daughter boards must be consistent before and after the replacement.

Step 17 Close the pRRU housing and tamp each side of the housing until a click is heard. Ensure that

the groove gaps between the front and back housings are evenly distributed. Then, use the M4 Phillips screwdriver to tighten the Phillips screw on the housing to 1.4 N•m, as shown in Figure

10-14.

Figure 10-14 Installing the pRRU housing

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LampSite Site Maintenance Guide

Step 18 Assemble the installation support, and use the M4 Phillips screwdriver to tighten the four

fastening screws to 2 N•m, as shown in Figure 10-15.

Figure 10-15 Assembling the installation support

10 Replacing the pDock Mother Board

NOTE

The Phillips screw is the one removed and kept in Step 9.

Step 19 Neatly insert four rubber plugs into the holes of the installation support, as shown in Figure

10-16.

Figure 10-16 Assembling the installation support

Step 20 Connect all the cables to the pRRU according to the recorded installations.

Step 21 Optional: Insert the rubber plug into the Ethernet port, as shown in Figure 10-17.

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LampSite Site Maintenance Guide 10 Replacing the pDock Mother Board

Figure 10-17 Assembling the installation support

Step 22 Install the pRRU. The installation must be based on different scenarios. For details, see LampSite

Installation Guide.

Step 23 Power on the pRRU by referring to 5.1 Powering On the pRRU.

Step 24 Instruct the network operator to unblock the pRRU.

l On the UMTS side, log in to the NodeB LMT and run the UBL BRD command to unblock

the RF daughter board.

l On the LTE side, log in to the eNodeB LMT and run the UBL BRD command to unblock

the RF daughter board.

Step 25 Take off the ESD gloves and pack up all the tools.

----End

Follow-up Procedure

l Place the replaced pDock Mother Board into an ESD box or bag. Then, place the ESD box

or bag into a foam-padded carton or the packing box of the new optical module.

l Record the information about the faulty component in the fault card.

l Contact the local Huawei office to deal with the faulty component.

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Huawei PRRU3901 Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Document

Contents

LampSite Site Maintenance Guide 1 Changes in LampSite Site Maintenance Guide

2 RHUB Maintenance Items

3 pRRU Maintenance Items

4 Powering On and Powering Off the RHUB

4.1 Powering On the RHUB

4.2 Powering Off the RHUB

5 Powering On and Powering Off the pRRU

5.1 Powering On the pRRU

5.2 Powering Off the pRRU

6 Replacing the RHUB

7 Replacing an Optical Module

8 Replacing the RF Daughter Board

9 Replacing the Wi-Fi Daughter Board

10 Replacing the pDock Mother Board