microsoft powerpoint - 03 oeb104710 enodeb lte v100r006 field maintance issue 1

8/13/2019 Microsoft PowerPoint - 03 OEB104710 eNodeB LTE V100R006 Field Maintance ISSUE 1

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eNodeB LTE V100R006 Field

Maintenance

www.huawei.com

Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.

eNodeB V100R006 FieldMaintenance

Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved. Page1

Objectives Upon completion of this course, you will be able to:

Know the Local maintenance system

Grasp the procedure of Power on and Power off eNodeB

Grasp replacing of eNodeB components

Know the routine maintenance items of eNodeB




Maintenance


Contents

1. Local Operation and Maintenance Introduction

2. Power on and Power off Procedure of eNodeB

3. Replacing Components of eNodeB

4. Maintenance items for eNodeB


Operation and Maintenance SystemStructure

M2000 Server eNodeB

LMT

M2000

Client

Local Maintenance

Remote Maintenance




Maintenance


Locally Connecting to eNodeB(LMPT)

Page4

1. LMPT 2.EthernetCable

3. PC

Default Local OM IP

address:

192.168.0.49Setting PC IP same

segment, such as:

192.168.0.88


Locally Connecting to eNodeB (UMPT)

The USB port with the USB silkscreen is used for the software upgrade

of a base station using a Universal Serial Bus (USB) flash drive. This port

also functions as a commissioning Ethernet port

An adapter is used for local maintenance connects the USB port on the

UMPT to an Ethernet cable during local maintenance

Page5

Default Local OM IPaddress:

192.168.0.49Setting PC IP same

segment, such as:

192.168.0.88




Maintenance


Locally Logging to eNodeB

Local OM IP address:192.168.0.49

User name: admin

Default password: hwbs@com


WebLMT Panel Overview

Page7

Statusbar

Others

Menu bar

Functions




Maintenance


MML Commands Introduction

MML command structure : Action + Object

Main action: ADD/MOD/RMV/SET/DSP/LST/SWP/BLK/UBL

Main objective: BRD/RRU/CELL/SCTPLNK/IPPATH

Example:

DSP BRD

BLK BRD

UBL BRD

Black: optional

Red: compulsory


Contents1. Local Operation and Maintenance Introduction







Maintenance


Prerequisite of Power on BTS3900

Page10

The input power cables are correctly and securely connected.

The power supply to the BTS3900 meets the specifications

listed in Power Supply Requirements of the BTS3900

The Power switches on the DCDU panel are all set to OFF

BTS3900 (Ver.B) has DCDU-01

BTS3900 (Ver.C) has DCDU-11A

BTS3900(Ver.C) has DCDU-12A

The external power supply to the BTS3900 is shut down


Procedure of Power on BTS3900 Step 1 Use a multimeter to measure the resistance

between the external power supply and the ground to

ensure that there is no short circuit.

Step 2 Turn on the external power switch to power on the

BTS3900.

Step 3 Set the circuit breakers on the EPU or EPS for the

corresponding components to ON, and check the powersupply status of each component.

Page11




Maintenance


Procedure of Power on BTS3900

Step 4 (Optional) Set the circuit breakers for the

corresponding components on each DCDU in a BTS3900

cabinet to ON. Skip this step if there is no circuit breaker on

the DCDU, such as the DCDU-12A.

Step 5 Set the circuit breaker on the UPEU in the BBU to

ON.

Step 6 Check the power supply to each component

according to the indicator state.

Page12


Procedure of Power on BTS3900 Step 7 (Optional) If the power supply to a component fails

after the cabinet is powered on, handle the fault according

to the instructions in the following table.

Page13




Maintenance



Page14



Page15




Maintenance


Powering Off the BTS3900

You can power off the BTS3900 by two methods: normal

power-off and emergency power-off

Perform the normal power-off

before an equipment swap or a foreseeable regional blackout

Perform the emergency power-off

when a fire, smoke, or water immersion occurs in the equipment

room

Page16


Procedure of Normal Power offBTS3900 Modify the management status to block all the RFUs in the

cabinet

Set all the circuit breakers on the DCDU to OFF

Set all circuit breakers on the EPU, ETP, or EPS subrack to

OFF.

Shut off the external power supply. Set the power switch for the

batteries to OFF if the BTS3900 cabinet is configured with

external batteries or PS4890 cabinet which houses batteries

Page17




Maintenance


Procedure of Emergency Power offBTS3900 Shut off the external power supply

Set the power switch for the batteries to OFF if the BTS3900

cabinet is configured with external batteries or PS4890 cabinet

which houses batteries

Set all the DC power switches on the DCDU to OFF if time

permits

Emergency power-off may cause damage to the equipment

or boards. Therefore, this type of power-off is not

recommended in a normal situation

Page18


Power on Base Station Prerequisite

Input power cables for the DBS3900 are correctly connected.

The power supply to the DBS3900 meets the requirements of

the power system.

External power supply to the DBS3900 has been shut off.

All circuit breakers in the APM30H have been set to OFF.

Circuit breakers on the boards in the BBU have been set to

OFF.

Boards, modules, and cables have been installed in the cabinet

Page19




Maintenance


Procedure of power on BaseStation

Step 1 Use a multimeter to measure the resistance between

the external power supply and the ground to ensure that there

is no short circuit.

Step 2 Turn on the external power circuit breaker to power on

the cabinet.

Step 3 Set the circuit breakers for the corresponding

components on the DCDU-03B to ON.

Step 4 Set the circuit breaker on the UPEU in the BBU to ON,and check the power supply status of each component.

Page20


Procedure of power on Base Station Step 5 (Optional) If the power supply to a component fails after

the cabinet is powered on, handle the fault according to the

instructions in the following table. For the detail information, see

the remark.

Page21




Maintenance


Procedure of power on Base Station

Page22


Procedure of power on BaseStation

Page23




Maintenance


Procedure of Power off Base Station

Step 1 Determine whether to perform a normal power-off or

emergency power-off as required.

Page24

If... Then...

The base station needs to be powered

off in scenarios such as a planned

equipment swap or foreseeable

regional blackout

Proceed to 2 to perform a normal power-

off.

The base station needs to be

powered off in emergent scenarios

such as a fire, smoke, or water damage

occurred in the BBU3900

Proceed to 3 to perform an emergency

power off.


Procedure of Power off Base Station

Step 2 Turn off the power switch for the BBU3900, set all circuit

breakers on all power units to OFF, and switch off the external

power equipment.

Step 3 First switch off the external power equipment for the

DBS3900. If time permits, then turn off the power switches for the

BBU3900 and on all power units.

Page25




Maintenance


Powering On an RRU

Prerequisite

The RRU hardware is installed and RRU cable connections are

secure

The input voltage of a DC RRU ranges from -36 V DC to -57 V

DC

The input voltage of an AC RRU ranges from 100 V AC to 240 V

AC

Page26


Procedure of Power on RRU Step 1 On the power epuipment for the RRU, set the corresponding

circuit breaker to ON or insert a corresponding EPC connector and

ensure that the indicator on the EPC connector is on to power on the

RRU.

Step 2 Wait for three to five minutes, and then check the status of the

indicators on the RRU

Step 3 Take corresponding actions based on the status of the indicators.

Page27

If Then...

The RRU is operating properly End the power-on check task.

The RRU is faulty Set the circuit breaker to OFF, rectifythe fault, and go to 1.




Maintenance


Procedure of Powering Off an RRU

Power off the RRU in a normal situation

On the power equipment for the RRU, set the corresponding circuit

breaker to OFF or remove the corresponding EPC connector and ensure

that the indicator on the EPC connector is off.

If RRUs are cascaded, consider the impacts of power-off operations on

lower-level RRUs to prevent service interruption

Power off the RRU in an emergency

Shut off the external input power of the power equipment for the RRU.

If time permits, set the corresponding circuit breaker on the auxiliary

power device for the RRU to OFF

Emergent power-off may lead to damage on the RRU. Therefore, this

type of power-off is not recommended in normal cases

Page28









Maintenance


Replacing eNodeB Components

Replacing BBU3900 Components

Replacing the RFU

Replacing the RRU (For DBS3900)

Replacing a DCDU

Replacing the Fan Box

Replacing the Power Subrack

Page30

Query Electronic Label of the

Board

Replacing the BBU

Replacing the LMPT/UMPT

Replacing the LBBP

Replacing the FAN Unit

Replacing the UPEU

Replacing the UEIU

Replacing the USCU

Replacing the UBRI

Replacing the UTRP

Replacing the UCIU

Replacing the Optical Module


Query Electronic Label of theBoard Before replacing a board, you need to query the electronic

label of the board at the remote end to confirm the type of

board to be replaced

Run the DSP BRDMFRINFO command on the LMT

Page31




Maintenance


Replacing the BBU

As the core component of an eNodeB, the BBU3900

processes baseband signals for the entire eNodeB. It also

provides transmission ports between the eNodeB and the

MME/S-GW.

Replacing the BBU disrupts all the services carried by the

eNodeB. Therefore, the BBU should be replaced within 20

minutes

Page32


Procedure of Replacing BBU Step 1 Instruct the M2000 administrator to perform the

following operations for the replacement of the BBU

Back up the service data or transfer the service carried by the

BBU to be replaced if required

Modify the ESN in the DHCP management interface by referring

to the new BBU

Step 2 Power off the BBU according to BBU power offprocedure

Step 3 Wear an ESD wrist strap or a pair of ESD gloves

Page33




Maintenance


Procedure of Replacing BBU

Step 4 Record all the cable connections on the panels of the

boards in the BBU to be replaced

Step 5 Disconnect the power cables, transmission cables, CPRI

cables, and alarm cables from the panels of the boards in the BBU

Step 6 Loosen the four M6 screws on the BBU, and then remove

the BBU

Page34


Procedure of Replacing BBU Step 7 Remove all the boards in the faulty BBU, install the

boards in the corresponding slots of the new BBU, and then

install filler panels in the idle slots

Step 8 Install the new BBU, tighten the screws on the BBU

Step 9 Power on the BBU, for details, see power on BBU

procedure

Step 10 Check whether the new BBU is functional according to

the status of the LEDs on the BBU

Step 11 Reapply for a license, and then install the license for the

eNodeBPage35




Maintenance


Replacing the LMPT/UMPT The LMPT/UMPT manages the entire eNodeB system in terms of OM and

signaling processing and provides the clock for the BBU3900

LMPT/UMPT board is hot-swappable

LMPT and UMPT can not work as active and standby in the same BBU3900

If a standby LMPT/UMPT is not configured, replacing the LMPT /UMPT

disrupts all services carried by the LTE. Therefore, the LMPT /UMPT should

be replaced within 10 minutes

Page36


Prerequisite—See Remarks

Page37




Maintenance

2


Procedure of Replacing LMPT/UMPT

Step 1 Instruct the M2000 administrator to perform the following

operations before replacing the LMPT/UMPT

Back up NE configuration

Run the ULD LICENSE command to back up the license in the

LTE mode

Run the BLK CELL command to block all cells of the base station

working in LTE mode


Step 3 Record all the cable connections on the panel of the board

to be replaced

Page38



Step 3 Record all the cable connections on the panel of the


Step 4 Disconnect the cables from LMPT/UMPT

Step 5 Remove the two M3 screws on the panel, and then

pull out the LMPT/UMPT

Page39




Maintenance

2



Step 6 Install the new board, tighten the screws on the

board

Step 7 Check the status of the new board by observing the

status of indicators

Step 8 Perform the following operations according to onsite

conditions of the eNodeB as in the notes, then Step 9

Step 9 Take off the ESD wrist strap or ESD gloves, and

pack up all tools.

Page40


Replacing the LBBP The LTE Baseband Processing unit (LBBP) in the BBU3900

processes the baseband signals and CPRI signals

The LBBP board is hot-swappable

Page41




Maintenance

2


Procedure of Replacing LBBP

Step 1 Instruct the M2000 administrator to perform the

following operations before replacing the LBBP

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

LBBP


Page42


Procedure of Replacing LBBP Step 3 Record all the CPRI cable connections on the panel of the


Step 4 Disconnect the CPRI cable from LBBP

Step 5 Loosen the two M3 screws on the panel, raise the ejector

levers, and then pull out the LBBP

Step 6 Install the new board, lower the ejector levers, tighten the

screws on the board to 0.6 N·m , and then reconnect the cables

Page43




Maintenance

2


Procedure of Replacing LBBP

Step 7 Wait for about 15 minutes after the board is started, then

check the status of the new board by observing the status of

indicators

Step 8 Instruct the M2000 administrator to perform,

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

Check whether any new alarms are generated by the base station

and handle the alams

Synchronize the inventory information manually

Ask the onsite engineers to perform dialing tests to check whether

the cells can normally provide services

Step 9 Take off the ESD wrist strap or ESD gloves, and pack up all

toolsPage44


Replacing the FAN Unit Replacing the FAN unit may lead to overheating alarms due

to interruption of heat dissipation in the BBU. The services,

however, should not be affected

The FAN unit is hot-swappable

Replacing the FAN unit may lead to overheating alarms due

to interruption of heat dissipation in the BBU. Therefore, the

FAN unit should be replaced within three minutes

Page45




Maintenance

2


Procedure of Replacing FAN Unit


Step 2 Remove the two M3 screws from the panel, and then

remove the FAN unit

Step 3 Install the new unit, tighten the screws on the unit

Step 4 Check the status of the indicators to determine

whether the new module works properly

Page46


Procedure of Replacing FAN Unit Step 5 Instruct the M2000 administrator to,

Check whether any new alarms are generated by the base

station



pack up all tools

Page47




Maintenance

2


Replacing the UPEU

The Universal Power and Environment Interface Unit

(UPEU) is configured in the BBU and it converts -48 V DC

or +24 V DC power into +12 V DC

Replacing the UPEU interrupts power supply to the BBU,

and accordingly interrupts services carried by the BBU.

Therefore, the UPEU must be replaced within 10 minutes

Page48


Procedure of Replacing UPEU Step 1 Instruct the M2000 administrator to perform the

following operations before replacing the UPEU,

Run the BLK CELL command to block all cells of the base

station working in LTE mode

Replacing the UPEU interrupts all the services carried by the

base station if no standby UPEU is configured

Step 2 Power off the BBU

Step 3 Put on an ESD wrist strap or ESD gloves

Step 4 ecord all the cable connections on the panel of the

module to be replaced

Page49




Maintenance

2


Procedure of Replacing UPEU

Step 5 Disconnect the power cable, monitoring cable, and alarm

cable from the UPEU

Step 6 Loosen the two M3 screws

on the panel, and pull out the UPEU

Step 7 Install the new board, tighten the screws on the board to 0.6

N·m, and then reconnect the cables

Step 8 Power on the BBU according to the instructions in Powering

On the BBU3900

Page50


Procedure of Replacing UPEU Step 9 Check the status of the new board by observing the


Step 10 Instruct the M2000 to perform,

Run the UBL CELL command to unblock all the LTE cells


station


Ask the onsite engineers to perform dialing tests to check

whether the cells can normally provide services


pack up all toolsPage51




Maintenance

2


Replacing the UEIU

The Universal Environment Interface Unit (UEIU) provides

channels for transmitting the monitoring signals from external

equipment to the BBU

The UEIU is hot-swappable

Replacing the UEIU may cause the failure to monitor the

external equipment. Therefore, the UEIU must be replaced

within 5 minutes

Page52


Procedure of Replacing UEIU Step 1 Wear an ESD wrist strap or a pair of ESD gloves

Step 2 Record all cable connections on panel of the board to be

replaced

Step 3 Disconnect the monitoring cable and alarm cable from the

UEIU

Step 4 Loosen the two M3 screws on the panel, and pull out the

UEIU

Page53




Maintenance

2


Procedure of Replacing UEIU

Step 5 Install the new board, tighten the screws on the

board to 0.6 N·m, and then reconnect the cables

Step 6 Instruct the M2000 to perform,


station



pack up all tools

Page54


Replacing the USCU The Universal Satellite card and Clock Unit (USCU) in the

BBU receives clock signals such as the GPS, RGPS, BITS,

and M-1PPS signals. In addition, it transmits or receives

1PPS+TOD clock signals

The USCU board is hot-swappable

Page55




Maintenance

2


Procedure of Replacing USCU


Step 2 Record all cable connections on panel of the board to be

replaced

Step 3 Disconnect the GPS clock signal cable from the USCU

Step 4 Loosen the two M3 screws on the panel, raise the ejector

levers, and then pull out the USCU

Page56


Procedure of Replacing USCU Step 5 Install the new board, lower the ejector levers, tighten

the screws on the board to 0.6 N·m and then reconnect the

cables

Step 6 Check the status of the new board by observing the





Step 8 Take off the ESD wrist strap or ESD gloves, and pack

up all toolsPage57




Maintenance

3


Procedure of Replacing UTRP

Step 6 Set the DIP switches on the new board according to the settings of

the DIP switches on the replaced board. For details about the DIP switch

Step 7 Install the new board, lower the ejector levers, tighten the screws

on the board to 0.6 N·m and then reconnect the cables

Step 8 Check the status of the new board by observing the status of

indicators.


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



Ask the onsite engineers to perform dialing tests to check whether the cells can

normally provide services

Step 10 Take off the ESD wrist strap or ESD gloves, and pack up all tools

Page60


Replacing the UBRI The Universal BaseBand Radio Interface Board (UBRI)

provides ports for CPRI cables

Replacing the UBRI interrupts all the services carried on the

board

The UBRI board is hot-swappable

Page61




Maintenance

3


Procedure of Replacing UBRI

Step 1 Instruct the M2000 administrator to perform

On the eNodeB, run the BLK CELL command to block all the

cells

Step 2 Put on an ESD wrist strap or ESD gloves



Step 4 Disconnect CPRI cables from the board

Step5 Loosen the two M3 screws on the panel,

raise the ejector levers, and then pull out the UBRI

Page62


Procedure of Replacing UBRI Step 6 Install the new board, lower the ejector levers, tighten the

screws on the board to 0.6 N·m and then reconnect the cables


indicators


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



Ask the onsite engineers to perform dialing tests to check whether the

cells can normally provide services


tools Page63




Maintenance

3


Replacing the UCIU

The Universal inter-Connection Infrastructure Unit (UCIU)

interconnects BBUs. It forwards control and synchronization

information from one BBU to another

The UCIU is hot-swappable

Page64


Procedure of Replacing UCIU Step 1 Put on an ESD wrist strap or ESD gloves



Step 3 Disconnect the interconnection cable between the

optical ports on the UCIU

Step 4 Loosen the two M3 screws on the panel,

raise the ejector levers, and then pull out the UCIU

Page65




Maintenance

3


Procedure of Replacing UCIU

Step 5 Install the new board, lower the ejector levers, tighten the

screws on the board to 0.6 N·m and then reconnect the cables


indicators




Ask the onsite engineers to perform dialing tests to check whether the

cells can normally provide services


toolsPage66


Replacing the Optical Module The optical module is used for the optical transmission

between the BBU and other devices

Optical modules are hot-swappable

Replacing the optical module interrupts the services carried on

this port

Page67




Maintenance

3


Procedure of Replacing theOptical Module Step 1 Put on an ESD wrist strap or ESD gloves

Step 2 Loosen the screws on the cover plate of the

RRU cabling cavity using an M4 Phillips

screwdriver, and then open the cover plate.

Step 3 Record the connections of the optical

module and optical fibers.

Step 4 Press the latch on the optical fiber

connector, and then remove the connector from the

faulty optical module.

Page68


Procedure of Replacing the Optical

Module Step 5 Lower the puller on the faulty optical module, and then pull the

puller until the optical module is removed from the RRU.

Step 6 Choose the optical module of the same type as the faulty optical

module according to the label on the module. Install the new optical

module into the RRU.

Step 7 Insert the optical fiber connector into the new optical module.

Step 8 Check the operating status of the new RRU by observing the

status of RRU indicators.

Step 9 Reconnect the cables in the cabling cavity.

Page69




Maintenance

3


Procedure of Replacing the OpticalModule

Step 10 Close the cabling cavity of the RRU and use an M4

Phillips screwdriver to tighten the screws on the cover plate for

the cabling cavity.

Step 11 Take off the ESD gloves, and pack up all the tools.

Page70


Replacing the RFU The RFU is a radio frequency unit. Replacing

an RFU interrupts the services carried on the

RFU

Replacing an RFU disrupts the services

carried on the RFU

It takes about 6 to 10 minutes to replace an

RFU

The handle is used during the RFU

replacement. The handle is placed in the slot

at the upper right inside the cabinet door

Page71




Maintenance

3


Procedure of Replacing RFU Optional Step 1 If the RFU is functional and is to be replaced as a

spare part, check whether the maximum transmit power of the

RFU to be replaced is locked if it is functional

If the maximum transmit power of the RFU is locked, set the

maximum transmit power to 0 before placing the RFU in the

storehouse of spare parts

To check whether a maximum transmit power is locked for an

RFU,

Run the DSP RRU command to query the maximum output power of

the TX channels of the RFU

Set the maximum transmit power for the RFU to 0 to disable thelocking for the maximum transmit power

Run the LOC RRUTC command to disable the maximum output power

locking for TX channels of the RFU

Page72


Procedure of Replacing RFU Step 2 Instruct the M2000 administrator to

run the BLK BRD command to block the faulty RFU

Step 3 Verify that TX channels of the RFU are disabled. In this

situation, the ACT indicator on the RFU panel blinks at 0.5 Hz

Step 4 Wear the ESD wrist strap or ESD gloves

Step 5 Turn off the switch for DC power output for the RFU on

the direct current distribution unit (DCDU) to power off the

RFU

Page73




Maintenance

3


Procedure of Replacing RFU

Step 6 Label the power cable for the faulty RFU, and then

disconnect the cable

Step 7 Label the RF jumper of the faulty RFU, loosen the DIN

7/16 elbow male connector of the RF jumper, and disconnect

the RF jumper

Step 8 Label the common public radio interface (CPRI) cable

for the RFU, and disconnect the CPRI cable

Page74


Procedure of Replacing RFU Step 9 Loosen the screws at the four corners of

the RFU using a Phillips screwdriver, and then

pull the RFU using the handle to move it

outwards 50 mm to 100 mm

Use one hand to hold the RFU and use the other

hand to pull the RFU out of the cabinet.

Page75




Maintenance

3



Step 10 Put the faulty RFU into an ESD box, and then place the

handle back to the original position

Step 11 Place the new RFU on the corresponding guide rails,

and then slide it along the rails until it is in position

Step 12 Tighten the captive screws at the four corners of the

panel of the RFU to secure the RFU on the subrack

Page76


Procedure of Replacing RFU Step 13 Insert the CPRI cable into the panel of the new

RFU according to the labels

Step 14 Connect the labeled RF jumper to the new RFU,

and tighten the DIN male elbow connector to 25 N·m to 35

N·m using a torque wrench

Step 15 Connect the labeled power cable to the new RFU

and secure the cable

Page77




Maintenance

4



Step 16 Turn on the switch for DC output power on the DCDU to power

on the RFU

Step 17 Check the operating status of the RFU by observing indicator

status

Step 18 Optional: Set the maximum output power locking for TX

channels of the RFU

Run the LOC RRUTC command to set the maximum output power of the

RFU

Run the RST BRD command to reset the RFU

Run the DSP TXBRANCH command to check whether the maximum outputpower of each RFU is set successfully

Page78


Procedure of Replacing RFU Step 19 Instruct the M2000 administrator to

Run the BLK BRD command to unblock the RFU on the

eNodeB

Step 20 Take off the ESD wrist strap or gloves, and then

pack up all the tools

Page79




Maintenance

4


Replacing the RRU

A distributed base station consists of RRUs and a BBU

Replacing an RRU interrupts all the services carried by the

RRU, and alarms are generated

It takes about 6 to 10 minutes to replace an RRU, which

involves disconnecting the cables, removing screws,

removing the faulty RRU, inserting a new RRU, tightening

the screws, connecting the cables to the new RRU, and

loading the software

Page80


Procedure of Replacing RRU Optional Step 1 If an RRU to be replaced is not faulty, store

it in the spare parts inventory after the maximum output

power locking for TX channels is disabled for the RRU

Check the maximum output power locking for TX channels of

the target RRU

Run the DSP RRU command to query the maximum output power

of the TX channels of the RRU

Set the maximum output power of the TX channels of the RRUto 0 and disable the maximum output power locking

run the LOC RRUTC command to disable the maximum output

power locking for TX channels of the RRU

Page81




Maintenance

4


Procedure of Replacing RRU

Step 2 Instruct the M2000 administrator to

run the BLK BRD command to block the RRU On the eNodeB

Step 3 Power off the RRU by referring to Powering Off an

RRU

Step 4 Wear ESD gloves

Step 5 Loosen the screws on the cover plate of the RRU

cabling cavity using an M4 Phillips screwdriver for common

RRU or M5 Phillips screwdriver for 12L blade RRU, and then

open the cover plate

Page82


Procedure of Replacing RRU Step 6 Record all the cable connections on the module to be

replaced.

Step 7 Disconnect cables from the cabling cavity and bottom panel

Step 8 For the 12L blade RRU , If the RRU installed in centralized

mode is to be replaced, first use an M6 Phillips screwdriver to loosen

the two screws on the metal sheet of the RRU and remove the metal

sheet, as shown in following f igure. For the common RRU, Loosen

the captive screws on the two hoist clamps on the main mounting

bracket using an M4 Phillips screwdriver.

Page83




Maintenance

4


Procedure of Replacing RRU

Step 10 Tighten the captive screws on the two hoist clamps on the

main mounting bracket to 1.4 N·m (12.39 lbf·in.) using an M4 torque

screwdriver. Install a new RRU and then waterproof the RRU

Step 11 Reconnect all required cables, and verify that vacant cable

troughs in the cabling cavity are equipped by waterproof blocks

Step 12 Close the cover plate of the RRU cabling cavity, and then

tighten the protection screw on the cover plate of the RRU cabling

cavity using an M4 torque screwdriver

Step 13 Power on the RRU by referring to Powering On an RRU

Step 14 Check the operating status of the new RRU by observingthe status of RRU indicators. For details, see the description of

RRU indicators in the RRU Hardware Description

Page86


Procedure of Replacing RRU Step 15 Optional: Set the maximum output power locking

for TX channels of the RRU

Run the LOC RRUTC command to set the maximum output

power of the RRU

Run the RST BRD command to reset the RRU

Run the DSP TXBRANCH command to check whether the

maximum output power of each RRU is set successfully

Step 16 Unblock the RRU

run the UBL BRD command to unblock the RRU

Step 17 Take off the ESD gloves, and pack up all the tools

Page87




Maintenance

4


Replacing the DCDU

The DCDU, installed under the BBU3900, supplies DC

power for the cabinet.

DCDU-03B for BTS3900A(ver.B) and DBS3900;

DCDU-11B for BTS3900A(ver.C) and DBS3900;

DCDU-12B for BTS3900A(ver.D) and DBS3900;

Replacing the DCDU disrupts the services carried on the

corresponding cabinet.

It takes about 20 minutes to replace the DCDU.

Page88


Procedure of Replacing DCDU Step 1 Wear an ESD wrist strap or a pair of ESD gloves

Step 2 Modify the administrative state and block all RRUs

powered by the DCDU to be replaced.

Step 3 (Optional) Before replacing a DCDU-03B or DCDU-

11B, record the status of circuit breakers SW0 to SW9 on

the DCDU, and set all the circuit breakers to OFF. If a

DCDU-12B is to be replaced, skip this step.

Page89




Maintenance

4


Procedure of Replacing DCDU

Step 4 Disconnect the DCDU from power supply provided

by the power equipment.

Step 5 Record the installation positions (DC output ports) of

all connectors on the DCDU, and remove the connectors.

Page90


Procedure of Replacing DCDU Step 6 Use a Phillips screwdriver to remove the protective

cover from the DC input wiring terminal block of the DCDU,

as shown in the following figure.

Page91




Maintenance

4



Step 7 Record the connection of the DC input power cables, and

disconnect the power cables.

Step 8 Use a Phillips screwdriver to remove the two screws from each

side of the DCDU, and pull the DCDU out of the cabinet along the guide

rails gently, as shown in the following figure.

Page92


Procedure of Replacing DCDU Step 9 Place the new DCDU on the installation position, and

gently push it into the cabinet along the guide rails. Tighten

the two M6 screws on each side of the DCDU to 2 N·m

(17.7 lbf·in.).

Step 10 Remove the protective cover for the DC input wiring

terminal block from the new DCDU, reconnect the power

cables to the new DCDU according to the recordedinstallation positions, and then reinstall the protective cover.

Page93




Maintenance

4



Step 11 Reinstall the other cables to the new DCDU

according to the recorded installation positions.

Step 12 Turn on the switch on the power equipment for the

DCDU to power on the DCDU.

Step 13 According to the recorded status of the circuit

breakers on the DCDU, turn on the circuit breakers that

were set to OFF in 3.

Page94


Procedure of Replacing DCDU Step 14 Check the indicators on the RRUs according to the

following table to verify that these RRUs are properly powered by

the DCDU.

Step 15 Take off the ESD wrist strap or ESD gloves, and pack up

all tools.Page95

ITEM NORMAL STATUS

Indicators on the RRU panel • RUN indicator: blinking (on for 0.125s and off for 0.125s, or

on for 1s and off f or 1s)

• ALM indicator: steady off

Indicators on the BBU • UPEU: The RUN indicator is steady on.

• FAN: The STATE indicator is blinking green.

• The normal status of the indicators on the BBU is as

follows:

RUN indicator: blinking green (on for 1s and off f or 1s)

ALM indicator: steady off

ACT indicator: steady on




Maintenance

4


Replacing the Fan Box

The fan box works with the air inlet box in the cabinet to

form a ventilation loop, and provides forced ventilation

Replacing the fan box may result in over-temperature

alarms due to interruption of heat dissipation for the cabinet,

but services of the base station are not affected

It takes about 20 minutes to replace a fan box

Page96


Procedure of Replacing FAN Box Step 1 Wear an ESD wrist strap or a pair of ESD gloves

Step 2 Set the DC power switch labeled FAN on the DCDU-

01 to OFF. Below figure shows the position of the power

switch on the DCDU-01 for the fan box ear an ESD wrist

strap or a pair of ESD gloves

Page97




Maintenance

5


Procedure of Replacing FAN Box

Step 3 Label the cables on

the panel of the fan box and

then remove the cables

Step 4 Loosen the captive

screws on both sides of the

adjustable cable trough.

Then, raise the cable trough

and fix it at the upper

mounting hole, as shown in

Right figure

Page98


Procedure of Replacing FAN Box Step 5 Remove the four screws from the fan box. Pull out the

fan box by one-third of its length with one hand by using the

handle key, hold the fan box with the other hand, and then

pull the entire fan box out of the cabinet, as shown in Right

Figure . Then, put the faulty fan box into an ESD box

Page99




Maintenance

5


Procedure of Replacing FAN Box

Step 6 Install the new fan box. Then, secure the four screws

Step 7 Place the adjustable cable trough to its original

position, and then tighten the captive screws on both sides of

the adjustable cable trough

Step 8 Install the cables to the panel of the fan box based on

the labels

Step 9 Set the switch on the DCDU-01 for the fan box to ON


Page100


Replacing an EPS 01 Subrack Replacing an EPS subrack interrupts the services carried on

a base station.

Replacing an EPS takes about 30 minutes.

The following figure shows the position of the EPS subrack

in an APM30H.

Page101




Maintenance

5


Replacing an EPS 01 Subrack

Step 1 Put on an ESD wrist strap or a pair of ESD gloves.

Step 2 Set the BAT and PSU circuit breaker on the EPS

subrack to OFF.

Step 3 Switch off external AC power supply to the APM30H.

Step 4 Disconnect the ground cable for the EPS subrack

from the ground bar on the inner left wall of the cabinet.

Step 5 Remove the PMU and all PSUs from the EPS

subrack.

Page102


Replacing an EPS 01 Subrack Step 6 Use a Phillips screwdriver to remove the cable tray

from the right side of the EPS subrack.

Step 7 Label the cables delivered with the EPS subrack on

the right side of the EPS subrack, and remove the cables.

Step 8 Remove the screws from the AC protective cover on

the EPS subrack, and then remove the AC protective cover.

Step 9 Label the AC input and output power cables

delivered with the EPS subrack on the left side of the EPS

subrack, and remove the cables.

Page103




Maintenance

5



Step 10 bel the DC output power cables delivered with the

EPS subrack on the right side of the EPS subrack, and

remove the cables.

Step 11 Remove the remaining seven screws from both

sides of the EPS subrack, and pull the EPS subrack out of

the cabinet along the guide rails, as shown in the following

figure.

Step 12 Push the new EPS subrack into the cabinet alongthe guide rails, and tighten the seven screws on the EPS

subrack to 2 N·m (17.7 lbf·in.) and the one hexagonal screw

to 3 N·m (26.55 lbf·in.). Page104


Replacing an EPS 01 Subrack Step 13 (Optional) If the faulty EPS subrack uses 220 V AC

three-phase input power, the short-circuiting bars at the AC

INPUT terminals on the new EPS subrack must be

removed.

Step 14 Reinstall the PMU and all PSUs in the

corresponding slots in the EPS subrack.

Step 15 Connect the new power series 120 connector to theremoved cable tray, and reinstall the cable tray onto the

right inner side of the cabinet.

Page105




Maintenance

5



Step 16 Reinstall cables on the EPS subrack according to

attached labels.

Step 17 Install the AC protective cover on the left AC input

area of the EPS subrack, and tighten the screw on the

cover.

Step 18 Restore external AC power supply to the APM30H.

Step 19 Set the PSU and PSU circuit breakers on the EPS

subrack to ON.

Page106


Replacing an EPS 01 Subrack Step 20 Observe the status of indicators on the PMU and

PSUs to determine whether the new EPS subrack is

working properly.

When the PMU is working properly, the RUN indicator is

blinking green, and the ALM indicator is steady off.

When the PSUs are working properly, the power indicators are

steady green, and the protection indicators and alarm

indicators are steady off.


pack up all tools.

Page107




Maintenance

5


Replacing a PMU 01B

The PMU is hot-

swappable.

Replacing a PMU takes

about 5 minutes.

The position of the PMU

varies with the base

station type. The right

figure shows thepositions of the PMU.

Page108


Replacing a PMU 01B Step 1 Put on an ESD wrist strap or a pair of ESD gloves.

Step 2 Record the cable connections on the panel of the

PMU to be replaced and disconnect the cables from the

PMU.

Step 3 Use a Phillips screwdriver to remove the two screws

from the handle on the panel of the PMU.

Step 4 Gently pull the handle to slide the PMU out of the

subrack and remove the PMU from the subrack.

Page109




Maintenance

5


Replacing a PMU 01B

Step 5 Take out a new PMU, and set the DIP switch on the

PMU panel according to the setting of the DIP switch on the

faulty PMU. The following figure shows the position of the

DIP switch.

Step 6 Install the new PMU.

Step 7 Check the status of indicators on the new PMU to

determine whether the new PMU is working properly.

Step 8 Take off the ESD wrist strap or ESD gloves, andpack up all tools.

Page110


Replacing a PSU (EPW30-48A) The PSU is hot-

swappable.

Replacing a PSU takes

about 3 minutes.

The position of the PSU

varies with the base

station type. The rightfigure shows the position

of the PSU.

Page111




Maintenance

5


Replacing a PSU (EPW30-48A)

Step 1 Put on an ESD wrist strap or a pair of ESD gloves.

Step 2 Use a screwdriver to loosen the screws on the ejector lever

on the panel of the PSU.

Step 3 Gently pull the ejector lever to slide the PSU out of the

subrack and remove the PSU from the subrack.

Page112


Replacing a PSU (EPW30-48A) Step 4 Install a new PSU.

Use a screwdriver to loosen the screws on the ejector lever of

the PSU, and raise the ejector lever.

Slide the PSU along the guide rails into the subrack until it

snaps shut, and lower the ejector lever.

Slide the PSU along the guide rails into the subrack until it

snaps shut, and lower the ejector lever.

Page113




Maintenance

5


Replacing a PSU (EPW30-48A)

Step 5 Check the status of indicators on the new PSU to

determine whether the new PSU is working properly. When the

new PSU is working properly, the power indicator is steady green,

and the protection indicator and alarm indicator are steady off.

Step 6 Take off the ESD wrist strap or ESD gloves, and pack up

all tools.

Page114









Maintenance

5


Equipment Room MaintenanceItems

Item Interval Operation Instruction Reference Standard

Environmentalalarms

Daily Check whether powersupply alarms, fire alarms,

or smoke alarms are

reported

No power supplyalarms, fire alarms,

or smoke alarms are

reported.

Temperaturein

the equipmentroom

Weekly Record the temperatureshown on the thermometer

in the equipment room.

The normaltemperature

ranges from -20° Cto +55

°

C.

Humidity inthe

equipmentroom

Weekly Record the humidity shownon the hygrometer in the

equipment room.

The normal humidityranges from 5% RH

to 95% RH.

Illumination in

the equipment

room

Every

two

months

Check whether the routine

and emergency illumination

in equipment room isnormal

-

Page116


Equipment Room Maintenance ItemsItem Interval Operation Instruction Reference

Standard

Air

conditioner

Every

two

months

Check whether the air conditioner is

working normally.

-

Protectivedevices

Everytwo

months

Check whether anti-disasterdevices, equipment

protection devices, and fire

protectiondevices are in

good condition.

There is nodanger of

damage to

theequipment by

rats or insects.

EquipmentRoom

cleanlines

s

Everytwo

months

Check whether cabinets,equipment housing,

equipment interior, tables, floor,

doors, and windows are clean.

All the itemsto be checked

are clean.

Page117




Maintenance

6


Power Supply and Grounding SystemMaintenance Items

Page118

Item Interval OperationInstruction

Reference Standard

Powercables

Monthly Check theconnections of power

cables carefully.

The power cables are notaging, and there is no

corrosion on theconnection points

Voltage Monthly Measure the voltage

of the power supply

usinga multimeter.

The voltage is within

normal range

PGND

cables

Monthly Check whether the

PGND cable and

ground bar areconnected properly.

The connections of the

PGND cable are secure.

The cable is not aging.The connection points are

sound with no corrosionon them.


Power Supply and Grounding SystemMaintenance Items

Page119


CheckingEarth

resistance

Monthly Measure the earthresistance using an

electric earthresistance

tester and keep a

record.

The groundingresistance of the cabinet

is smallerthan 10 ohms.

Batteries Annually Check the batteriesand

rectifiers.

The battery capacity iswithin normal range and

the batteries arecorrectly

connected. Theperformance parametersof rectifiers are normal.




Maintenance

6


Main Components Maintenance Items

Page120

Item Interval OperationInstruction

Reference Standard

Fans Monthly Check whetherthe fans are

operational.

The fans work properlywithout exceptional sounds

generated by frictionsbetween the blades of the fan

and the subrack.

LEDs on the

boards

Monthly Check whether

the LEDs on theboards are normal.

For details about the status of

LEDs, see the hardwaredescription about the

corresponding boards.

Air filter Quarterl

y

If there is too

much dust on theair filter, clean the

air filter


Main Components MaintenanceItems

Page121


Exterior ofthe cabinet

Quarterly

Check whether there aredents, cracks, holes, or

corrosion on the surfaceof the cabinet and

whether the cabinet label

is legible.

-

Lock anddoor of the

Cabinet

Quarterly

Check whether the lock isnormal and the door can

beopened and closed easily.

-

Cabinetcleanliness

Quarterly

Check whether thecabinet is clean.

The cabinet surface isclean. The subracks

arenot dusty.




Maintenance

6


Main Components Maintenance Items

Page122


ESD wriststrap

Quarterly

Use either of the followingmethods:

Use an ESD wrist strap

tester to test the ESDwrist

strap.Use a multimeter to test

theearth resistance of the

ESD

wrist strap.

If you are using anESD wrist strap tester,

the LED GOOD is on.

If you are using amultimeter, the earth

resistance is between0.75 MΩ and 10 MΩ.

Fan box Annually If there is too much dust

on the surface of or insidethe fan box, clean the fan

box.

-


Summary Maintenance methods of eNodeB

Power on and Power off procedure and key points

Basic operations of local operation and maintenance

Routine maintenance items of equipment and evirement




Maintenance

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