Huawei Technologies PRRU3901 pico Remote Radio Unit User Manual Site Maintenance Guide

Huawei Technologies Co.,Ltd pico Remote Radio Unit Site Maintenance Guide

1. UserManual_LampSite Installation Guide(02)(PDF)-EN.pdf
2. UserManual_pRRU3901 Compliance and Safety Manual.pdf
3. UserManual_LampSite Site Maintenance Guide(02)(PDF)-EN.pdf

UserManual_LampSite Site Maintenance Guide(02)(PDF)-EN.pdf

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

Issue 02 (2014-05-27) Huawei Proprietary and Confidential

About This Document

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.

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)

V100R009C00 and later versions

Single-mode versions mapping

V100R009C00:

lNodeB: V200R016C00

leNodeB: V100R007C00

pRRU3901 (referred to as pRRU in this

document)

Intended Audience

This document is intended for:

lSystem engineers

lSite maintenance engineers

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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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.

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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iii

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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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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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

About This Document.....................................................................................................................ii

1 Changes in LampSite Site Maintenance Guide.......................................................................1

2 RHUB Maintenance Items...........................................................................................................4

3 pRRU Maintenance Items............................................................................................................8

4 Powering On and Powering Off the RHUB...........................................................................10

4.1 Powering On the RHUB...............................................................................................................................................11

4.2 Powering Off the RHUB..............................................................................................................................................12

5 Powering On and Powering Off the pRRU............................................................................13

5.1 Powering On the pRRU................................................................................................................................................14

5.2 Powering Off the pRRU...............................................................................................................................................15

6 Replacing the RHUB...................................................................................................................16

7 Replacing an Optical Module...................................................................................................20

8 Replacing the RF Daughter Board............................................................................................23

9 Replacing the Wi-Fi Daughter Board......................................................................................29

10 Replacing the pDock Mother Board......................................................................................35

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vii

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)

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.

01 (2014-04-26)

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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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:

lReplacing 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

after replacing.

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:

l9 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

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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Content Change Description

9 Replacing the Wi-Fi Daughter Board

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

lReplacing the pRRU

Draft A (2013-11-30)

This is a draft release.

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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

Daily Check whether any

power alarm, fire

alarm, or smoke

alarm is reported.

No power alarm, fire

alarm, or smoke

alarm is reported.

Temperature in the

equipment room

Each time

maintenance is

performed

Record temperatures

in the equipment

room measured by a

thermometer.

-5°C to 45°C

Humidity in the

equipment room

Each time

maintenance is

performed

Record humidity in

the equipment room

measured by a

hygrometer.

5%RH to 95%RH

Lighting system in

the equipment room

Every other month Check whether the

routine lighting

system and

emergency lighting

system are running

properly.

Air conditioner Every other month Check whether the

air conditioner is

running properly.

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Item Check Frequency Operation Reference

Standard

Disaster protection

devices

Every one month Check whether the

disaster protection,

equipment

protection, and

firefighting devices

are normal.

lThe equipment

room is equipped

with portable

foam-type

extinguishers,

and the pressure

and expiration

date must be

checked.

lThe equipment

room has no

mice, ants, flying

insects, or other

risks.

Cleanness Every one month Check whether the

cabinet, equipment

housing, equipment

interior, desktop,

floor, door, and

window are clean

and tidy.

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

Standard

Fan in the PSU Monthly or quarterly Check whether the

fan is working

properly.

The fan works

properly without any

abnormal smell or

sound.

Equipment surface Monthly or quarterly Check whether the

equipment surface is

intact.

The equipment

surface is intact and

the label of the

cabinet is legible.

Equipment cleanness Monthly or quarterly Check whether the

equipment is clean.

The equipment

surface is clean.

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Item Check Frequency Operation Reference

Standard

Indicators Monthly or quarterly Check whether the

indicators on the

equipment are

working properly.

For details about the

indicator status, see

RHUB Ports and

Indicators in

LampSite Hardware

Description.

Electrostatic

discharge (ESD)

wrist strap

Quarterly Check the ESD wrist

strap in either of the

following ways:

lUse an ESD wrist

strap tester to

check the ESD

wrist strap.

lUse a multimeter

to test the ground

resistance of the

ESD wrist strap.

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.

Maintenance Items for the Power System and Grounding System

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.

The power cables are

securely connected

and not deteriorating.

The joints are not

corroded.

Voltage Monthly or quarterly Use a multimeter to

measure the voltage

of the power supply.

The voltage is in the

permissible range.

PGND cables Monthly or quarterly Checks whether the

PGND cables and

ground bar are

securely connected.

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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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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3 pRRU Maintenance Items

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

Equipment 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.

The equipment

surface is intact and

the label of the

cabinet is legible.

Equipment cleanness Monthly or quarterly Check whether the

equipment is clean.

The equipment

surface is clean.

Indicators Monthly or quarterly Check whether the

indicators on the

equipment are

working properly.

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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Table 3-2 Power system maintenance items

Item Check Frequency Operation Reference

Standard

Power cables Monthly or quarterly Check the power

cable connections.

The power cables are

securely connected

and not deteriorating.

The joints are not

corroded.

Voltage Monthly or quarterly Use a multimeter to

measure the voltage

of the power supply.

The voltage is in the

permissible range.

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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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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 power-

off state cannot exceed 7 days during maintenance.

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.

Disable the power supply,

rectify the board fault, and

then power on the RHUB

again.

Steady off There is no power input, or an

alarm about the board is

reported.

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.

1s on and 1s off The RHUB is running

properly.

End the power-on check task.

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

loaded.

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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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

lNormal 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.

lEmergency power-off

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

----End

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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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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 power-

off state cannot exceed 7 days during maintenance.

Procedure

Step 1 Power on the pRRU.

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.

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

port.

lThe 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.

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

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

Go to Step 3. Otherwise, replace it. When the

input voltage is within the permissible range,

go to Step 3.

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

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

Steady on There is power input, but the

board is faulty.

Disable the power supply,

rectify the board fault, and

then power on the pRRU

again.

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

check the power input again.

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

properly.

End the power-on check task.

On for 0.125s and off for

0.125s

The board software is being

loaded.

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.

----End

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

lNormal 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.

lEmergency power-off

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

----End

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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.

Prerequisites

lA new RHUB is available.

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

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

mallet.

Context

It takes about 10 minutes to replace the RHUB.

Procedure

lReplace 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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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.

lReplace 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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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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Follow-up Procedure

lPlace 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.

lRecord the information about the faulty component in the fault card.

lContact the local Huawei office to deal with the faulty component.

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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.

Prerequisites

lThe number and type of faulty optical modules are confirmed, and new optical modules

are available.

lThe new optical modules to be installed must match CPRI rates.

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

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

ESD box or bag.

Context

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

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

CPRI port when the power supply is connected.

lReplacing 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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Site Maintenance Guide 7 Replacing an Optical Module

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CAUTION

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

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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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

lPlace 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.

lRecord the information about the faulty component in the fault card.

lContact the local Huawei office to deal with the faulty component.

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Site Maintenance Guide 7 Replacing an Optical Module

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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.

Prerequisites

The replacement takes approximately 5 minutes.

Context

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

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

lThe 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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lOn the UMTS side, log in to the LMT and run the BLK BRD command to block the RF

daughter board.

lOn 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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NOTE

lThe 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.

lKeep the Phillips screw secure for future use.

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

NOTICE

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

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

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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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

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

lThe 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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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.

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

the RF daughter board of the pRRU.

lOn 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

lPlace 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.

lRecord the information about the faulty component in the fault card.

lContact the local Huawei office to deal with the faulty component.

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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.

Prerequisites

The replacement takes approximately 5 minutes.

Context

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

Procedure

Step 1 Instruct the network operator to block the pRRU.

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

daughter board.

lOn 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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CAUTION

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.

NOTICE

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.

Figure 9-2 Removing the pRRU housing

NOTE

lThe 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.

lKeep the protection screw secure for future use.

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

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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

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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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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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.

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

the RF daughter board of the pRRU.

lOn 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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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.

Prerequisites

The process takes approximately 20 minutes.

Procedure

Step 1 Instruct the network operator to block the pRRU.

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

daughter board.

lOn 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.

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

Step 3 Put on ESD gloves.

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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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

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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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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Figure 10-5 Removing the pRRU housing

NOTE

lThe 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.

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

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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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.

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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Figure 10-11 Installing a new 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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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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NOTE

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

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

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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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.

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

the RF daughter board.

lOn 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

lPlace 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.

lRecord the information about the faulty component in the fault card.

lContact the local Huawei office to deal with the faulty component.

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Site Maintenance Guide 10 Replacing the pDock Mother Board

Issue 02 (2014-05-27) Huawei Proprietary and Confidential

Huawei Technologies PRRU3901 pico Remote Radio Unit User Manual Site Maintenance Guide

Huawei Technologies Co.,Ltd pico Remote Radio Unit Site Maintenance Guide

Contents

UserManual_LampSite Site Maintenance Guide(02)(PDF)-EN.pdf

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