Huawei Technologies PRRU3916 pico Remote Radio Unit User Manual Site Maintenance Guide

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DBS3900 LampSite

Site Maintenance Guide

Issue 07

Date 2016-05-30

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 07 (2016-05-30) Huawei Proprietary and Confidential

About This Document

Overview

This document describes routine maintenance items for a BBU, DCU3900, RHUB3908,

pRRU3901, pRRU3902, pRRU3907 and pRRU3911, such as equipment maintenance, and

power-on and power-off operations. It also explains how to replace the components and

modules.

NOTE

lUnless otherwise specified, BBU in this document refers to BBU3900 and BBU3910. For details of the

BBU site maintenance guide, see DBS3900 Site Maintenance Guide.

lDCU3900 referred to as DCU in this document. For details about the hardware maintenance guide of the

DCU, see DCU3900 Hardware Maintenance Guide.

lRHUB3908 referred to as RHUB in this document.

lUnless otherwise specified, pRRU in this document refers to pRRU3901, pRRU3902, pRRU3907 and

pRRU3911.

Product Version

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

Product Name Solution Version Product Version

DBS3900 LampSite lSRAN10.1 and later versions

lRAN17.1 and later versions

leRAN8.1 and later versions

leRAN TDD 8.1 and later

versions

V100R010C10 and later

versions

Intended Audience

This document is intended for:

lSystem engineers

DBS3900 LampSite

Site Maintenance Guide About This Document

Issue 07 (2016-05-30) Huawei Proprietary and Confidential

lSite maintenance engineers

Organization

1 Changes in DBS3900 LampSite Site Maintenance Guide

This chapter provides information about the changes in different document versions of

DBS3900 LampSite Site Maintenance Guide.

2 Device Maintenance Items

This chapter describes the device maintenance items.

3 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.

4 Powering On and Powering Off the pRRU3901

After the pRRU3901 is powered on, check the power supply voltage and indicator status.

Power off the pRRU3901 based on the power supply mode.

5 Replacing the Devices

This chapter describes the procedures and cautions when replacing the devices.

Conventions

Symbol Conventions

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

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.

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iii

Symbol Description

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.

[ ] 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

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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.

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 DBS3900 LampSite Site Maintenance Guide..................................................... 1

2 Device Maintenance Items.......................................................................................................... 4

2.1 RHUB Maintenance Items..............................................................................................................................................5

2.2 pRRU Maintenance Items.............................................................................................................................................. 8

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

3.1 Powering On the RHUB............................................................................................................................................... 11

3.2 Powering Off the RHUB.............................................................................................................................................. 12

4 Powering On and Powering Off the pRRU3901....................................................................13

4.1 Powering On the pRRU................................................................................................................................................14

4.2 Powering Off the pRRU............................................................................................................................................... 16

5 Replacing the Devices................................................................................................................ 17

5.1 Replacing the RHUB.................................................................................................................................................... 18

5.2 Replacing an Optical Module....................................................................................................................................... 21

5.3 Replacing the pRRU.....................................................................................................................................................23

DBS3900 LampSite

Site Maintenance Guide Contents

Issue 07 (2016-05-30) Huawei Proprietary and Confidential

1 Changes in DBS3900 LampSite Site

Maintenance Guide

This chapter provides information about the changes in different document versions of

DBS3900 LampSite Site Maintenance Guide.

07 (2016-05-30)

This is the seventh commercial release.

Compared with 05 (2015-10-30), no information is added.

Compared with 05 (2015-10-30), this issue incorporates the following changes:

Content Change Description

2.2 pRRU Maintenance Items Added the informations of pRRU3902,

pRRU3907, pRRU3911.

5.3 Replacing the pRRU

Compared with 05 (2015-10-30), this issue deletes the following new topics:

lpRRU3902 Maintenance Items

lpRRU3907 Maintenance Items

lpRRU3911 Maintenance Items

lReplacing the pRRU3902

lReplacing the pRRU3907

lReplacing the pRRU3911

06 (2015-12-30)

This is the sixth commercial release.

Compared with 05 (2015-10-30), this issue includes the following new topics:

lpRRU3911 Maintenance Items

lReplacing the pRRU3911

DBS3900 LampSite

Site Maintenance Guide 1 Changes in DBS3900 LampSite Site Maintenance Guide

Issue 07 (2016-05-30) Huawei Proprietary and Confidential

Compared with 05 (2015-10-30), no information is changed.

Compared with 05 (2015-10-30), no information is deleted.

05 (2015-10-30)

This is the fifth commercial release.

Compared with 04 (2015-07-30), this issue includes the following new topics:

lpRRU3907 Maintenance Items

lReplacing the pRRU3907

Compared with 04 (2015-07-30), no information is changed.

Compared with 04 (2015-07-30), no information is deleted.

04 (2015-07-30)

This is the fourth commercial release.

Compared with 03 (2015-06-30), no information is added.

Compared with 03 (2015-06-30), this issue incorporates the following change:

Content Change Description

Entire document Added the RHUB that has no electrical

transmission port.

Compared with 03 (2015-06-30), no information is deleted.

03 (2015-06-30)

This is the third commercial release.

Compared with 02 (2015-05-08), no information is added.

Compared with 02 (2015-05-08), this issue incorporates the following change:

Content Change Description

Entire document Added the descriptions about the DCU.

Compared with 02 (2015-05-08), no information is deleted.

02 (2015-05-08)

This is the second commercial release.

Compared with 01 (2015-03-23), no information is added.

Compared with 01 (2015-03-23), this issue incorporates the following change:

DBS3900 LampSite

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Content Change Description

2.2 pRRU Maintenance Items Deleted the descriptions about voltage

measuring of the pRRU.

Compared with 01 (2015-03-23), no information is deleted.

01 (2015-03-23)

This is the first commercial release.

Compared with draft A (2015-01-15), no information is added.

Compared with draft A (2015-01-15), this issue incorporates the following change:

Content Change Description

Entire document Added the descriptions about the

pRRU3902.

Compared with draft A (2015-01-15), no information is deleted.

Draft A (2015-01-15)

This is a draft release.

Compared with Issue 05 (2014-12-30) of V100R009C00, no information is added.

Compared with Issue 05 (2014-12-30) of V100R009C00, this issue incorporates the following

change:

Content Change Description

Entire document The base station in the LampSite solution is

renamed DBS3900 LampSite.

Compared with Issue 05 (2014-12-30) of V100R009C00, no information is deleted.

DBS3900 LampSite

Site Maintenance Guide 1 Changes in DBS3900 LampSite Site Maintenance Guide

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2 Device Maintenance Items

About This Chapter

This chapter describes the device maintenance items.

2.1 RHUB Maintenance Items

This chapter describes the RHUB maintenance items, involving the equipment room,

equipment, power system, and grounding system.

2.2 pRRU Maintenance Items

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

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2.1 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 +50°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

DBS3900 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.

2.2 pRRU Maintenance Items

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

Equipment Maintenance Items

Table 2-4 lists the equipment maintenance items for the pRRU.

Table 2-4 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

the chapter of Ports

and Indicators in

DBS3900 LampSite

Hardware

Description.

NOTE

For details about the ports and indicators of different pRRU models, see:

lpRRU: pRRU3901 Ports and Indicators

lpRRU (TDD): pRRU3901 Ports and Indicators

lpRRU3902: pRRU3902 Ports and Indicators

lpRRU3907: pRRU3907 Ports and Indicators

lpRRU3911: pRRU3911 Ports and Indicators

lpRRU3911: pRRU3916 Ports and Indicators

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Power System Maintenance Items

Table 2-5 lists the power system maintenance items for the pRRU.

Table 2-5 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.

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3 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.

3.1 Powering On the RHUB

The RHUB is powered by AC input.

3.2 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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3.1 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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3.2 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.

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

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

external power device.

lEmergency power-off

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

----End

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4 Powering On and Powering Off the

pRRU3901

About This Chapter

After the pRRU3901 is powered on, check the power supply voltage and indicator status.

Power off the pRRU3901 based on the power supply mode.

4.1 Powering On the pRRU

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

4.2 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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4.1 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

NOTE

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 PoE mode. The RHUB adopts the PoE power supply to provide

power for the pRRU over the CPRI_E0 port.

Step 2 Wait 3 to 5 minutes. Then Check the status of the RUN indicator on the pRRU3901 or 3GPP

indicator on the pRRU3902, pRRU3907 and pRRU3911.

Module If the RUN

Indicator Is...

It Indicates that... Then...

pRRU3901 Steady on There is power

input, but the board

is faulty.

Disable the power

supply, rectify the

board fault, and then

power on the

pRRU3901 again.

Steady off There is no power

input.

Disable the power

supply and check the

power input again.

On for 1s and off for

The pRRU3901 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

pRRU3901 again.

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Module If the RUN

Indicator Is...

It Indicates that... Then...

pRRU3902/

pRRU3907/

pRRU3911/

pRRU3916

Blinks white at 4 Hz The pRRU is

loading software,

configuring data, or

it is not running.

Wait until the

software is loaded.

If the loading is not

completed in five

minutes, power off

the pRRU and check

whether the data

configuration file is

correct. After the

fault is rectified,

power on the pRRU

again.

Blinks white at 0.5

Hz (on for 1s and off

for 1s)

The pRRU is

working properly

and does not

transmit power.

Check whether the

services have been

configured and

power amplification

have been enabled

on the pRRU.

Is steady white The cell is set up

and transmits power

properly.

No further action is

required.

Is steady orange. There is power

input, but the

hardware is faulty.

Power off the

pRRU, rectify the

hardware fault, and

then power it on

again.

Blinks orange at 0.5

Hz (on for 1s and off

for 1s)

A minor alarm

(indicating an

HDLC link

disconnection, for

example) is

generated.

Troubleshoot based

on the alarm

information.

Is off The board is not

powered on.

Turn off the power

supply switch and

check whether the

power input is

normal. If the power

input is normal,

check for and rectify

board faults, and

turn on the power

supply switch again.

----End

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4.2 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.

a. Remove the Ethernet cable.

lEmergency power-off

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

----End

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5 Replacing the Devices

About This Chapter

This chapter describes the procedures and cautions when replacing the devices.

5.1 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. RHUBs are classified into

those with electrical transmission ports and those with no electrical transmission ports. Unless

otherwise specified, this document uses the RHUBs with no electrical transmission ports as an

example.

5.2 Replacing an Optical Module

An optical module provides a port for opto-electronic conversion. This enables the

transmission between the RHUB and BBU3900 through the optical fiber. Replacing the

optical module requires removing the optical fibers. This interrupts all the services.

5.3 Replacing the pRRU

pRRU is an indoor remote radio unit. It processes RF signals. Replacing the pRRU interrupts

all the services carried on it.

DBS3900 LampSite

Site Maintenance Guide 5 Replacing the Devices

Issue 07 (2016-05-30) Huawei Proprietary and Confidential

5.1 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. RHUBs are classified into

those with electrical transmission ports and those with no electrical transmission ports. Unless

otherwise specified, this document uses the RHUBs with no electrical transmission ports as an

example.

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.

a. Power off the RHUB by referring to 3.2 Powering Off the RHUB.

b. Record the cable connections.

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

d. Use a torque screwdriver or Phillips screwdriver to remove the four screws on the

mounting ear of the RHUB, as shown in Figure 5-1.

Figure 5-1 Removing the mounting ear

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e. Remove the RHUB from the rack.

f. Install the new RHUB. For details, see DBS3900 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.

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

h. Power on the RHUB by referring to 3.1 Powering On the RHUB.

i. 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 DBS3900 LampSite Hardware Description.

lReplace the RHUB installed on a wall.

a. Power off the RHUB by referring to 3.2 Powering Off the RHUB.

b. Record the cable connections.

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

d. 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 5-2.

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Figure 5-2 Removing the mounting ear

e. Install the new RHUB on a wall. For details, see DBS3900 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.

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

g. Power on the RHUB by referring to 3.1 Powering On the RHUB.

h. 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 DBS3900 LampSite Hardware Description.

----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.

5.2 Replacing an Optical Module

An optical module provides a port for opto-electronic conversion. This enables the

transmission between the RHUB and BBU3900 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. The 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.

NOTE

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 3.2 Powering Off the RHUB.

NOTE

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 5-3.

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Figure 5-3 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, as shown in

Figure 5-4.

Figure 5-4 Removing the optical module

Step 6 Install the new optical module onto the corresponding CPRI port, as shown in Figure 5-5.

Figure 5-5 Installing the new 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, as shown in Figure 5-6.

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Figure 5-6 Installing the optical fiber

Step 8 Power on the RRU according to the instructions in 3.1 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.

5.3 Replacing the pRRU

pRRU is an indoor remote radio unit. It processes RF signals. Replacing the pRRU interrupts

all the services carried on it.

Prerequisites

lReplacing the pRRU when:

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–The functional modules inside a pRRU or the housing of pRRU is damaged.

–Adding the RF daughter board or Wi-Fi daughter board.

lThe hardware type is confirmed and a new pRRU is available.

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

lThe following tools are available: an electrostatic discharge (ESD) wrist strap and ESD

gloves.

Context

It takes about 5 minutes to replace the pRRU.

NOTE

The pRRU can be installed on a metal pole, wall, or ceiling, and the procedures for replacing the pRRU

are almost the same. The following uses a ceiling-mounted pRRU as an example.

Procedure

Step 1 Instruct the network operator to block the pRRU.

NOTE

The DBS3900 LampSite solution supports immediate block, idle block, and delayed block. Application of

idle block and delayed block produces the same effect as application of immediate block.

lpRRU3901:

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

the RF daughter board of the pRRU.

–On the LTE side, log in to the LMT and run the BLK BRD command to block the

RF daughter board of the pRRU.

lpRRU3902/pRRU3907/pRRU3911/pRRU3916:

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

pRRU.

–On the LTE side, log in to the LMT and run the BLK BRD command to block the

pRRU.

Step 2 Wear ESD gloves.

NOTE

lTake proper ESD protection measures, such as wearing ESD gloves to prevent electrostatic damage to the

boards, modules, or electronic components.

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

pRRU.

Step 3 Power off the pRRU. For details, see 4.2 Powering Off the pRRU.

Step 4 Removing the pRRU to be replaced.

1. Record the cable connections.

2. Take insulation measures, and then remove all cables from the pRRU.

3. Removing the pRRU.

–Removing the pRRU3901. Hold the pRRU3901 case in one hand and pull the hoist

clamp on the mounting bracket with the other hand, as shown in step a in Figure

5-7. Then, remove the mounting bracket from the pRRU3901, as shown in step b in

Figure 5-7.

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Figure 5-7 Removing the pRRU3901

–Removing the pRRU3902or pRRU3911. Hold the pRRU case in one hand and

apply force to the hoist clamp on the mounting bracket with the other hand, as

shown in step a in Figure 5-7. Then, remove the mounting bracket from the pRRU,

as shown in step b in Figure 5-8.

Figure 5-8 Removing the pRRU

–Removing the pRRU3907or pRRU3916. Remove the two dowels on the top of the

attachment plate from the mounting kit, and push the pRRU upwards, as shown by

illustrations b and c in Figure 5-9.

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NOTICE

When removing the pRRU, hold the pRRU handle with one hand and support the

bottom of the pRRU with the other hand. This prevents personnel injury caused by

any falling pRRU.

Figure 5-9 Removing the pRRU

Step 5 Install the new pRRU.

1. Install the new pRRU. The installation must be based on different scenarios. For details,

see DBS3900 LampSite Installation Guide.

2. Connect the cables to the pRRU according to the recorded positions.

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.

Step 6 Optional: Instruct the network operator to run MOD AP, change the faulty pRRU WIFI

MAC to the new pRRU WIFI MAC in AC Window, when pRRU with three transmission

ports is configured with Wi-Fi daughter board.

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Step 7 Power on the pRRU by referring to 4.1 Powering On the pRRU.

Step 8 Check whether the new pRRU is working properly according to the indicator status on the

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

DBS3900 LampSite Hardware Description.

NOTE

For details about the ports and indicators of different pRRU models, see:

lpRRU: pRRU3901 Ports and Indicators

lpRRU (TDD): pRRU3901 Ports and Indicators

lpRRU3902: pRRU3902 Ports and Indicators

lpRRU3907: pRRU3907 Ports and Indicators

lpRRU3911: pRRU3911 Ports and Indicators

lpRRU3911: pRRU3916 Ports and Indicators

Step 9 Instruct the network operator to unblock the pRRU.

lpRRU3901:

–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.

–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.

lpRRU3902/pRRU3907/pRRU3911/pRRU3916:

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

unblock the pRRU.

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

unblock the pRRU.

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

----End

DBS3900 LampSite

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Issue 07 (2016-05-30) Huawei Proprietary and Confidential

Huawei Technologies PRRU3916 pico Remote Radio Unit User Manual Site Maintenance Guide

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

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