Maintenance Dn99177651

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Maintenance

dn99177651Issue 5-1 en

# Nokia CorporationNokia Proprietary and Confidential

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468956A.505_NOLS

Nokia UltraSite EDGE Base Station User Manual



The information in this document is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This document is intended for the useof Nokia's customers only for the purposes of the agreement under which the document issubmitted, and no part of it may be reproduced or transmitted in any form or means without theprior written permission of Nokia. The document has been prepared to be used by professionaland properly trained personnel, and the customer assumes full responsibility when using it.Nokia welcomes customer comments as part of the process of continuous development andimprovement of the documentation.

The information or statements given in this document concerning the suitability, capacity, or performance of the mentioned hardware or software products cannot be considered binding butshall be defined in the agreement made between Nokia and the customer. However, Nokia hasmade all reasonable efforts to ensure that the instructions contained in the document areadequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the document.

Nokia's liability for any errors in the document is limited to the documentary correction of errors.NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS DOCUMENTOR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARYLOSSES), that might arise from the use of this document or the information in it.

This document and the product it describes are considered protected by copyright according tothe applicable laws.

NOKIA logo is a registered trademark of Nokia Corporation.

Other product names mentioned in this document may be trademarks of their respectivecompanies, and they are mentioned for identification purposes only.

Copyright © Nokia Corporation 2002. All rights reserved.

Hereby, Nokia Corporation declares that this Nokia UltraSite

EDGE Base Station is in compliance with the essential

requirements and other relevant provisions of Directive:1999/5/EC.

The product is marked with the CE marking and Notified Body

number according to the Directive 1999/5/EC.

This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference in a residential installation.

This equipment generates, uses and can radiate radio frequency energy and, if not

installed and used in accordance with the instructions, may cause harmful interference

to radio communications. However, there is no guarantee that interference will not

occur in a particular installation.

Changes or modifications not expressly approved by the party responsible for

compliance could void the user s authority to operate the equipment.

The term IC: before the radio certification number only signifies that Industry Canada

technical specifications were met.

0523

2 (115) # Nokia CorporationNokia Proprietary and Confidential


Maintenance



Contents

Contents 3

List of tables 6

List of figures 7

Summary of changes 9

1 About this document 111.1 Images 12

2 Performing preventive maintenance 132.1 General maintenance procedure 13

2.2 Checking the cabinet seals 142.3 Checking the Temperature Control System 142.4 Lubricating the door lock 152.5 Checking the hinges 152.6 Checking the cable connections 152.7 Checking the screws 172.8 Checking the dummy panels 172.9 Checking the power supply 182.10 Running system tests 182.10.1 Running GSM/EDGE system tests 182.10.2 Running WCDMA system tests 19

3 Reading LED indicators 213.1 GSM/EDGE units 213.2 Reading Transceiver unit LEDs 223.2.1 Transceiver RF unit 223.2.2 Transceiver Baseband unit 223.3 Reading Transmission unit LEDs 233.4 Reading the Dual Variable Gain Duplex Filter unit LED 243.5 Reading the Base Operations and Interfaces unit LED 243.6 Reading the Power Supply unit LED 243.7 Reading the Remote Tune Combiner LED 253.8 WCDMA units 263.9 Reading Transceiver unit LEDs 273.10 Reading System Clock unit LEDs 27

3.11 Reading Antenna Filter unit LEDs 283.12 Reading remaining WCDMA unit LEDs 29

4 Troubleshooting and fault reporting 314.1 GSM/EDGE Troubleshooting 314.1.1 Troubleshooting the BTS Manager connection 314.1.2 Troubleshooting electrical power to the BTS 324.1.3 Troubleshooting Transmission unit operation 334.1.4 Troubleshooting Transceiver unit operation 334.1.5 Troubleshooting Fan units 34



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Contents



4.2 WCDMA Troubleshooting 354.2.1 Troubleshooting the BTS Manager connection 354.2.2 Troubleshooting electrical power to the BTS 354.2.3 Troubleshooting Transmission unit operation 36

4.2.4 Troubleshooting WCDMA Transceiver unit (WTR) operation 374.2.5 Troubleshooting WTCA Fan Module 374.3 Reporting faults 38

5 Replacing GSM/EDGE units 395.1 Handling units 395.2 Replacing Transceiver units 415.2.1 Replacing the TSxx 425.2.2 Replacing the BB2x unit 445.3 Replacing Transmission units 465.3.1 Removing Transmission units 475.3.2 Installing a new Transmission unit 48

5.3.3 Replacing a slave (other unit than in slot 1) Transmission unit 495.3.4 Replacing a master (slot 1) Transmission unit 505.3.5 Saving node information to a backup file 515.3.6 Importing FC E1/T1 Transmission unit information 515.4 Replacing Base Operations and Interfaces unit 525.5 Replacing Power Supply units 535.5.1 Replacing PWSA/PWSB units 535.5.2 Replacing PWSC units 555.6 Replacing combiner units 575.6.1 Replacing Wideband Combiner units 575.6.2 Replacing Remote Tune Combiner units 595.7 Replacing Multicoupler units 605.8 Replacing Duplexer units 63

5.9 Replacing IBBU components 655.9.1 Replacing the ADUx unit 665.9.2 Replacing the CCUx unit 665.9.3 Replacing the BATx unit 675.9.4 Replacing the BBAx 67

6 Replacing WCDMA units 696.1 WCDMA unit positions 706.2 Replacing units without affecting ongoing traffic 726.3 Replacing the units 726.4 Replacing a WAF unit 746.5 Replacing a WMP unit 75

6.6 Replacing a WTR unit 776.7 Replacing a WIC unit 796.8 Replacing a WSM unit 816.9 Replacing a WAM unit 836.10 Replacing a WSP unit 846.11 Replacing a WPS unit 856.12 Replacing a WSC unit 876.13 Replacing the AXU unit 896.14 Replacing the IFU unit 916.15 Replacing the WTCA Fan Module 92



Maintenance



7 Replacing parts of the cabinet core 957.1 Replacing GSM/EDGE fans 957.1.1 Replacing Unit Cooling fans 967.1.2 Replacing the Cabinet Cooling fan 100

7.2 Replacing a WCDMA unit cooling fan 1027.3 Replacing the GSM/EDGE heater (HETA) unit 1037.4 Replacing the WCDMA Heat Exchanger Fan 1067.5 Replacing the WCDMA Heat Exchanger Cell 1087.6 Replacing a faulty RF backplane 1107.7 Replacing a faulty BB rack 1127.8 Replacing a faulty WAF rack 113



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Contents



List of tables

Table 1. Common backplane/Interface Module connections 15

Table 2. TSxx unit LED indications 22

Table 3. BB2x unit LED indications 22

Table 4. Transmission unit three-colour status LED 23

Table 5. Flexbus DC LEDs on FXC RRI 23

Table 6. DVxx unit LED indications 24

Table 7. BOIx unit LED indications 24

Table 8. PWSx unit LED indications 25

Table 9. RTxx unit LED indications 25

Table 10. WTR unit LED indications 27

Table 11. WSC unit LED indications 28

Table 12. WAF unit LED indications 28

Table 13. WCDMA unit LED indications 29

Table 14. Troubleshooting BTS Manager connection 32

Table 15. Troubleshooting lack of power 32

Table 16. Troubleshooting Transmission unit operation 33

Table 17. Troubleshooting Transceiver unit operation 34

Table 18. Troubleshooting Fan unit operation 34

Table 19. Troubleshooting WCDMA BTS Manager connection 35

Table 20. Troubleshooting electrical power to the BTS 36

Table 21. Troubleshooting transmission unit operation 36

Table 22. Troubleshooting WTR unit operation 37

Table 23. Troubleshooting WTCA Fan Module unit operation 38



Maintenance



List of figures

Figure 1. Common backplane bottom row cabling 16

Figure 2. Common backplane upper row cabling 17

Figure 3. Antistatic wrist strap connection 41

Figure 4. TSxx unit replacement 44

Figure 5. BB2x unit installation 45

Figure 6. Transmission unit cover removal 48

Figure 7. Transmission unit replacement 49

Figure 8. BOIx unit replacement 53

Figure 9. PWSA unit replacement 54

Figure 10. PWSB unit replacement 55

Figure 11. PWSC unit replacement 57

Figure 12. WCxx unit replacement 58

Figure 13. RTxx unit replacement 60

Figure 14. M2xA unit replacement 62

Figure 15. M6xA unit replacement 63

Figure 16. DVxx unit replacement 65

Figure 17. Nokia UltraSite EDGE BTS with WCDMA units in the lower compartmentof the cabinet 71

Figure 18. Using the ejectors when installing units in the baseband section 73

Figure 19. WAF unit replacement 75

Figure 20. WMP replacement 77

Figure 21. WTR replacement 79

Figure 22. WIC replacement 80Figure 23. WSM replacement 82

Figure 24. WAM replacement 84

Figure 25. WSP replacement 85

Figure 26. WPS replacement 87

Figure 27. WSC replacement 89



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List of figures



Figure 28. AXU replacement 90

Figure 29. IFU replacement 92

Figure 30. WTCA Fan replacement 93Figure 31. Unit cooling fan locations 99

Figure 32. Cabinet Cooling fan replacement 101

Figure 33. HETA unit cables 104

Figure 34. HETA mounted in OAKx door 105

Figure 35. Sensor cable installation 106

Figure 36. Heat Exchanger Fan replacement 107

Figure 37. Heat Exchanger Cell replacement 109



Maintenance



Summary of changes

Summary of changes

First Release, 30 June 2000

Second Release, 12 January 2001

Third Release, 01 August 2001

Fourth Release, 31 December 2001

Fifth Release, 22 May 2002



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Summary of changes





Maintenance



1 About this document

Purpose

The Maintenance document provides information and procedures on how to

perform maintenance tasks for Nokia UltraSite EDGE Base Station (BTS)

products.

Content

This document contains the following information:

. Chapter 2 Performing preventive maintenance tasks

. Chapter 3 Reading LED indicators

. Chapter 4 Troubleshooting and reporting faults

. Chapter 5 Replacing GSM/EDGE units

.

Chapter 6 Replacing WCDMA units

. Chapter 7 Replacing parts of the cabinet core

Readership

The following specialists should be familiar with this document before starting

site planning or installation:

. network planners

. installation planners

. installation and commissioning personnel

. operation and maintenance (O&M) personnel

Prerequisites

Nokia requires that personnel who perform installation, commissioning, and

maintenance tasks have a basic knowledge of base station systems and

equipment.



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About this document



Pay careful attention to all Warnings and Cautions in this document.

1.1 Images

Readers should note that all images in this document are typical in nature and are

for general reference only.

For hardware, the versions depicted may differ from the latest version of

equipment.

For software, any version numbers shown in any of the windows/screens/dialog

boxes may not be the same as the actual software that is to be installed. It is

important to remember that the procedure steps must be followed, as these will

give advice on the correct software to be installed and the correct text that will bedisplayed in each window/screen/dialog box.



Maintenance



2 Performing preventive maintenance

This chapter describes how to perform preventive maintenance for Nokia

UltraSite GSM/EDGE and WCDMA BTS.

Warning

Potentially lethal voltages!

Switch the BTS power OFF from a disconnecting device or circuit breaker

before starting the maintenance work whenever the nature of maintenance

work causes a risk of electric shocks!

Warning

Be careful of the edges of the cabinet when performing any maintenance

work. The edges of the cabinet are sharp and may cause personal injury.

2.1 General maintenance procedure

General maintenance procedure:

1. Check the specific tools needed for the maintenance task in question. You

should always have installation tools, the BTS key, antistatic wrist strap

and Nokia Element Manager PC and PC cable with you.



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Performing preventive maintenance



Note

For installation tools and equipment, see Nokia UltraSite WCDMA Base Station

Requirements for Installation and Operation.

2. Keep the units in their delivery package until installation.

3. Perform the maintenance actions as specified in this document.

4. After installation, keep some of the packaging material for sending units to

service. Recycle the packaging material.

5. Keep a site folder to contain all the required site-specific information.

The site folder should include installation, commissioning and integration

check lists. Note however that the exact contents of a site folder is defined

by the customer project.

It is the responsibility of the customer to maintain and archive site-specific

documents.

2.2 Checking the cabinet seals

The cabinet seals (rubber gasket strips) are under the roof and around the door.

Check the seals periodically and clean with a cloth when necessary. Replace worn

or broken seals when necessary.

2.3 Checking the Temperature Control System

To maintain proper air circulation and prevent overheating of Nokia UltraSite

EDGE BTS, periodically clear the BTS cabinet interior of debris and free all air

inlets and outlets of obstructions. Remove accumulated dust and debris from unit cooling fins and unit fan blades to ensure adequate heat dissipation.

For additional product information, see Nokia UltraSite EDGE Temperature

Control System Product Description.



Maintenance



2.4 Lubricating the door lock

During site visits you may need to lubricate the door lock. If the Outdoor cabinet

is operating in temperatures below 0° C (32° F), lubricate the lock with a light,non-freezing, spray lubricant.

Apply lubricating oil to moving parts of the lock assembly and within the lock

cylinder by applying oil to the key and inserting it in the cylinder repeatedly.

2.5 Checking the hinges

Lubricate the hinges with lubricating oil and check that they work properly.

If the Outdoor cabinet is operating in temperatures below 0°C (32°F), lubricate

the hinges with a light, non-freezing spray lubricant.

2.6 Checking the cable connections

Perform a visual check of the cables and the cable connections. Replace all worn

or broken cables.

The Common backplane (CBP), Rectifier backplane (RFBP), and Interface

module (IFM) cable connections are defined in Table 1 for reference during cable

replacement.

Figures 2 and 1 illustrate the cable connections of the Common backplane.

Table 1. Common backplane/Interface Module connections

Cable Assem-

bly Description From To

993760 Common rack fans (signal/power) CBP - X22 Fan 1, 2, 3

993761 Common backplane/RFU fan

(signal/power)

CBP - X21 Fan 4, 5

993754 Common backplane/Rectifier

backplane

CBP - X23/X24 RFBP - X1

993740 Common backplane/Interface

module

CBP - X25 IFM - X5



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Table 1. Common backplane/Interface Module connections (cont.)

Cable Assem-

bly Description From To

993828 Interface module/Bias Tee IFM - X6 Bias Tee - X28

993741 Rectif ier backplane/DVxx/RTxx RFBP - X5/X14/X23 RTxx/DVxx - Power In

Figure 1. Common backplane bottom row cabling



Maintenance



Figure 2. Common backplane upper row cabling

2.7 Checking the screws

Check the tightness of the fixing screws on the front panels of the plug-in units.

Replace all worn or missing screws.

See Nokia UltraSite EGDE Base Station Cabinet Installation for the torque

recommendations.

2.8 Checking the dummy panels

Check the dummy panels which cover the empty slots not equipped with units.

For cooling and EMC to function satisfactorily, cover the empty slots with

dummy panels.



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Store any extra dummy panels in case of future changes to the configuration.

2.9 Checking the power supply

Periodically check the batteries of the Integrated Battery Backup (IBBU) for the

following defects:

. external damage

. pressure spots

. deformities

. terminal corrosion

. acid escape

The preceding conditions indicate that the battery is problematic.

Before you install new batteries, measure the voltage to ensure that the batteries

are charged. Battery testing should be accomplished periodically to ensure they

are functioning properly.

For more information about the IBBU and Nokia UltraSite Support, see Nokia

UltraSite EDGE Site Support User Manual .

2.10 Running system tests

2.10.1 Running GSM/EDGE system tests

To ensure the quality and maximum number of calls in a cell, run the Abis loop

test and the TRX test remotely from the BSC, NMS/2000 or NetAct. The tests

verify the condition of the hardware and help identify appropriate maintenance

tasks.

You can run the TRX test locally with Nokia BTS Manager, but you need to

block the TRX during the test. For more information, see Nokia BTS Manager

Online Help .



Maintenance



2.10.2 Running WCDMA system tests

To ensure the quality and maximum number of calls in a cell, run the Abis loop

test and the TRX test remotely from the RNC or NetAct. The tests verify thecondition of hardware and help identify appropriate maintenance tasks.

You can run the TRX test locally with Nokia WCDMA BTS Manager, but you

need to block the WTR during the test. For more information, see Nokia

WCDMA BTS Manager Online Help .



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Maintenance



3 Reading LED indicators

This chapter describes how to read the LED indicators of Nokia UltraSite GSM/

EDGE and WCDMA BTS units.

3.1 GSM/EDGE units

Every active unit has at least one tri-colour LED indicator. The LEDs on the front

of the unit indicate the unit s operational status or the potential fault of a unit in

the BTS.

The following units are equipped with LED indicators:

. Transceiver RF unit

. Transceiver Baseband unit

. Transmission unit

. Dual Variable Gain Duplex Filter unit

. Base Operations and Interfaces unit

. Power Supply unit

. Remote Tune Combiners

Note

When units are powered on, the LEDs should always be lit. When an LED is not lit, either the unit or the LED may be faulty, or there is no power to the unit.



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Reading LED indicators



3.2 Reading Transceiver unit LEDs

3.2.1 Transceiver RF unit

The TSxx unit has one LED that indicates its status.

Table 2 describes the LED colours and indications of the TSxx unit.

Table 2. TSxx unit LED indications

LED colour Steady Flashing

RED Fault or alarm TRX test

YELLOW Unit is on; transmitter off (no

calls at any time slot)

NA

GREEN Unit is on and transmitting (call

and/or BCCH)

NA

3.2.2 Transceiver Baseband unit

The BB2x unit has two LEDs (A&B) that indicate the status of each baseband

section. The first indicator shows the status of the first baseband module and the

lower indicates that of the second.

Table 3 describes the LED colours and indications of the BB2x unit sections.

Table 3. BB2x unit LED indications


RED Fault or alarm TRX test

YELLOW No Abis LAPD link Configuring

GREEN Unit is on and operating Software downloading



Maintenance



3.3 Reading Transmission unit LEDs

FC and FXC units have a three-colour LED indicator. This indicator displays the

current state of the Transmission unit as a quick on-site reference.

Table 4. Transmission unit three-colour status LED

Indicator Static Slow flashing Fast flashing

GREEN Operation Upon Master s command1); no alarms active

Software is downloading

YELLOW Major or minor alarm ac-

tive

Upon Master s command;

major or minor alarm(s)

active


RED Critical alarm active Upon Master s command;

critical alarms active


1) When the Q1 Master unit sends the Functional Entity

Indication Command (3 kHz)

Note

In FXC RRI there are also two green LEDs that display the current state of theassociated FlexBus interface.

Table 5. Flexbus DC LEDs on FXC RRI

LED Situation

No light No power feed or Tx signal

Flashing GREEN DC power feed to the outdoor unit active, Tx signal not active

Steady GREEN DC power feed to the outdoor unit and Tx signal active



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3.4 Reading the Dual Variable Gain Duplex Filter unitLED

The DVxx unit has one LED, common for both LNAs, that indicates their status.

Table 6 describes the LED colours and indications of the DVxx unit.

Table 6. DVxx unit LED indications

LED colour Steady

RED Unit LNA module major fault, no RX gain available

YELLOW Unite LNA module minor fault, partial RX gain available

GREEN LNA is on and operating

3.5 Reading the Base Operations and Interfaces unitLED

The BOIx unit has one LED that indicates its status.

Table 7 describes the LED colours and indications of the BOIx unit.

Table 7. BOIx unit LED indications


RED Unit faulty NA

YELLOW No LAPD connection or loss of

clock synchronisation (slave)

Configuring

GREEN Unit is on and operating Software downloading

3.6 Reading the Power Supply unit LED

The PWSx unit has an operating switch with two positions (ON and STAND

BY).



Maintenance



Table 8 describes the LED colour indications of the Power Supply unit.

Table 8. PWSx unit LED indications

LED colour Steady

RED . Unit faulty, major alarm, or short circuit in one of Nokia

UltraSite EDGE BTS units

. Output voltage is off because of a detected PWSx over

temperature

. Input voltage out of range

YELLOW . Output voltage off, power supply unit switch in ON position,

BTS in cold-start mode

.

Power shutdown signal sent from the BSC, NMS/2000 or NetAct

. Input voltage OK, switch on the power supply unit in STAND

BY position

GREEN Unit is on and operating

3.7 Reading the Remote Tune Combiner LED

The RTxx has one LED that indicates its status.

Table 9 describes the LED colours and indications of the RTxx unit.

Table 9. RTxx unit LED indications


RED Unit faulty NA

YELLOW Waiting for external input Configuring

GREEN

Unit is on and operating

Software downloading



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3.8 WCDMA units

Each WCDMA unit within the Nokia UltraSite EDGE BTS has one LED to

indicate its operational status, with the exception of the WAF and WSC unitswhich have two LEDs.

The LEDs are tricolour (yellow, red, green) and display seven different status

indications. Tables 10 to 13 show the meaning of these indications.

The following units are equipped with LED indicators:

. Transceivers, WTRs

. System clock units, WSCs

.

Antenna filters, WAFs

. Power amplifiers, WMPs

. Input combiner, WIC

. Summing and multiplexing unit, WSM

. Application manager, WAM

. Signal processor units, WSP

. ATM cross-connect unit, AXU

. Interface unit, IFU

Note

When WCDMA units are powered on, the LEDs should always be lit. If an LED

is not lit, either the unit or the LED is faulty or there is no power to the unit

Note

If one of the WSC units in a cabinet is on standby, its upper LED will not be lit.

This is an exception to the general LED interpretation and does not indicate that

the unit is faulty.



Maintenance



3.9 Reading Transceiver unit LEDs

Table 10 lists the LED indications for a WTR unit.

Table 10. WTR unit LED indications


RED Unit self-test on startup or

reset (LED appears red for a

second or less)

Or

Major alarm

Minor alarm

YELLOW Unit on and waiting (unit

should be in this state for 10

seconds or less)

Or

RF Transmission blocked (for

maintenance purposes)

or

Unit received a remote or

manual power-off (for main-

tenance purposes)

Software download or con-

figuration ongoing (unit non-

operational)

GREEN Unit On & working Local maintenance access

(unit operational)

or

Unit receiving parameters

while in operation

or

Software downloading from

the WAM or from the Network

during operation

3.10 Reading System Clock unit LEDs

Table 11 shows the LED indications for a WSC unit.



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Table 11. WSC unit LED indications




very brief moment - a second

or less)

Or

Major alarm

Minor alarm

YELLOW Unit on & waiting (unit should

be in this state for 10 sec-

onds or less)



operational)

GREEN Unit On & working

or

Unit in "Active" mode

Local maintenance access

(unit operational)

or


while in operation

or



during operation

3.11 Reading Antenna Filter unit LEDs

Table 12 lists the LED indications for a WAF unit.

Table 12. WAF unit LED indications





or less)

Or

Major alarm

Minor alarm

YELLOW Unit on & waiting (unit should Software download or con-



Maintenance



Table 12. WAF unit LED indications (cont.)



onds or less)


operational)


(unit operational)

or


while in operation

or


the WAM or from the Networkduring operation

Alternating RED

and GREEN

MHA Faulty

3.12 Reading remaining WCDMA unit LEDs

Table 13 lists the LED indications for the following units:

. Power Amplifiers (WMPs)

. Input Combiner (WIC)

. Summing and Multiplexing unit (WSM)

. Application Manager (WAM)

. Signal processor units (WSP)

. ATM Cross-connect unit (AXU)

. Interface unit (IFU)

Table 13. WCDMA unit LED indications





Minor alarm



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Table 13. WCDMA unit LED indications (cont.)


or less)

Or

Major alarm

YELLOW Unit on & waiting (unit should


onds or less)



operational)


(unit operational)

or Unit receiving parameters

while in operation

or



during operation



Maintenance



4 Troubleshooting and fault reporting

This chapter provides examples of how to locate and interpret faults in the

operation of Nokia UltraSite GSM/EDGE and WCDMA BTS and gives

instructions on how to correct the faults and report them to Nokia.

4.1 GSM/EDGE Troubleshooting

Note

For instructions on troubleshooting during commissioning of Nokia UltraSite

EDGE BTS, see BTS Commissioning in this manual.

For descriptions of alarms, see Nokia UltraSite EDGE Base Station Alarm Descriptions document in the latest Nokia UltraSite Software Release Binder .

If a fault occurs during BTS operation, connect the Nokia BTS Manager laptop

PC to the BOIx unit. BTS Manager windows; Supervision, BTS Events, and

Alarms, can help you identify the problem.

For additional information on Nokia UltraSite EDGE BTS status when

troubleshooting, use a mobile phone to contact Base Station Controller (BSC)

personnel.

4.1.1 Troubleshooting the BTS Manager connection

Fault Cannot connect to Nokia BTS Manager.

Table 14 shows how to troubleshoot the BTS Manager connection.



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Troubleshooting and fault reporting



Table 14. Troubleshooting BTS Manager connection

Potential cause Corrective action

Wrong BTS Manager port setting (COM1,

COM2)

Correct the settings.

LMP cable broken or not properly con-

nected

Check the connection, or replace/repair

the cable.

Faulty or damaged BOIx unit Reset or replace the BOIx.

Old or incorrectly installed BTS Manager

software

Check the software version and install

latest BTS software, if required. Re-install

correct software version, if CD is avail-able.

4.1.2 Troubleshooting electrical power to the BTS

Fault No power to Nokia UltraSite EDGE BTS.

Table 15 shows how to troubleshoot lack of electrical power.

Table 15. Troubleshooting lack of power


power supply unit is in STAND BY mode Turn the switch to the ON position.

Site mains power supply fault (power

supply LED is OFF)

. Replace if necessary.

. Check the site mains power source

and fuses.

Defective power cable Replace the power cable.

Cold-start function activates (power sup-

ply LED is YELLOW)

Close the door to allow the units to warm

up to a temperature of -5° C (20° F).

Defective power supply unit (LED is RED

may indicate the unit is overheated)

Replace the power supply unit.

Short in one of the plug-in units . Pull the units out one by one until the

power comes back on.

. Return the units one by one and

replace the faulty unit(s).



Maintenance



Table 15. Troubleshooting lack of power (cont.)


Wrong power supply type Install correct power supply units.

4.1.3 Troubleshooting Transmission unit operation

Fault No transmission connection to the BSC.

Table 16 shows how to troubleshoot Transmission unit operation.

Table 16. Troubleshooting Transmission unit operation


Abis cable not connected (LED is RED) Check the connection of the Abis cable

on the Transmission unit and at the BSC.

Defective Abis cable (LED is RED) Repair or replace the cable.

Line interface disconnected (LED is RED) . Connect a jumper cable from the TX

connector of each transmission inter-

face to its RX connector.

. If the GREEN LED is Steady, the line

interface is OK.

. Otherwise, replace the transmission

unit.

Incorrect transmission card setting (LED is

GREEN or YELLOW)

. Check the alarm with the Transmis-

sion Manager software.

. Check cross-connection and ensure

the interface is enabled.

. Check line interface settings.

Master Transmission unit is not in slot 1 Check location of transmission units.

Defective Transmission unit (LED is RED) Replace the Transmission unit.

4.1.4 Troubleshooting Transceiver unit operation

Fault The device status report in Nokia BTS Manager indicates that both the

BCCH TRX and the TCH TRXs are in Supervisory state.



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Note

When calls are ongoing normal TSxx LED indication is GREEN for both the

BCCH TRX and TCH TRXs. Normal TSxx LED indication with no ongoing

calls is GREEN for BCCH TRX and YELLOW for TCH TRX.

Table 17 shows how to troubleshoot Transceiver unit operation.

Table 17. Troubleshooting Transceiver unit operation


Objects are locked from the BSC, NMS/

2000 or NetAct

. Request the state from the BSC,

NMS/2000 or NetAct.

. Request an unlock from the BSC,

NMS/2000, NetAct or by using BTS

Manager, if necessary.

4.1.5 Troubleshooting Fan units

Fault The fan is not rotating.

Table 18 shows how to troubleshoot Fan unit operation.

Table 18. Troubleshooting Fan unit operation

Potential Cause Corrective Action

Fan cable not properly connected Verify proper cable connection.

OAK electronics module cable not prop-

erly connected to cabinet fan

Verify proper cable connection.

Fan rotor blocked Clear rotor.

Door switch faulty or not engaged

(cabinet fan)

. Replace switch.

. Engage door switch button.



Maintenance



4.2 WCDMA Troubleshooting

For instructions on troubleshooting during commissioning of the WCDMA part

of Nokia UltraSite EDGE BTS, see Nokia UltraSite WCDMA BTS Commissioning.

For descriptions of alarms, see Nokia UltraSite WCDMA BTS Alarm

Descriptions.

If a fault occurs during BTS operation, connect the Nokia WCDMA BTS

Manager laptop PC to the WAM unit. The LED indications and the WCDMA

BTS Alarm Manager window can help you to identify the problem.

For additional information on the WCDMA status of Nokia UltraSite EDGE BTS

when troubleshooting, use a mobile phone to contact Radio Network Controller (RNC) personnel.

4.2.1 Troubleshooting the BTS Manager connection

Fault

Cannot connect to Nokia WCDMA BTS Manager.

Table 19. Troubleshooting WCDMA BTS Manager connection


Wrong WCDMA BTS Manager port set-

ting (COM1, COM2)

Correct the settings

LMP cable broken or not properly con-

nected

Check the connection, or replace/repair

the cable

Faulty or damaged WAM unit Reset or replace the WAM unit.

4.2.2 Troubleshooting electrical power to the BTS

Fault:

No power to the WCDMA part of the Nokia UltraSite EDGE BTS.



35 (115)




Table 20. Troubleshooting electrical power to the BTS


WCDMA Power supply is in STAND BY

mode

Turn the switch to the ON position.

Site mains power supply fault (power

supply LED is OFF)

. Check the site mains power source

and fuses.

. Replace the WPS unit if necessary.

Defective power cable Replace the power cable.

Cold-start function activates (power sup-

ply LED is YELLOW)

Close the cabinet door to allow the units

to warm up to a temperature of -5°C (20°F).

Defective power supply unit (LED is RED

may indicate the unit is overheated)

Replace the WPS unit.

Short in one of the plug-in units . Pull the units out one by one until the

power comes back on.

. Return the units one by one and

replace the faulty unit(s).

Wrong power supply type Install correct power supply units.

4.2.3 Troubleshooting Transmission unit operation

Fault:

No transmission connection to the RNC.

Table 21. Troubleshooting transmission unit operation


Abis cable not connected (LED is RED) Check the connection of the Abis cable

on the Transmission unit and at the RNC.

Defective Abis cable (LED is RED) Repair or replace the cable.

Line interface disconnected (LED is

RED)

. Connect a jumper cable from the TX

connector of each transmission inter-

face to its RX connector.



Maintenance



Table 21. Troubleshooting transmission unit operation (cont.)


. If the GREEN LED is Steady, the line

interface is OK.

. Otherwise, replace the transmission

unit.

Incorrect transmission card setting (LED

is GREEN or YELLOW)

. Check the alarm with the Transmis-

sion Manager Software.

. Check the cross-connection and en-

sure the interface is enabled.

. Check the interface settings.

Master Transmission unit is not in slot 1 Check location of transmission units.

Defective Transmission unit (LED is

RED)

Replace the Transmission unit.

4.2.4 Troubleshooting WCDMA Transceiver unit (WTR) operation

Fault

The device status report in Nokia WCDMA BTS Manager indicates that the

WTR unit is in Supervisory state.

Table 22. Troubleshooting WTR unit operation


Objects are locked from the RNC or

NetAct

. Request the state from the RNC or

NetAct.

. Request an unlock from the RNC or

NetAct.

4.2.5 Troubleshooting WTCA Fan Module

Fault:

The fan is not rotating.



37 (115)




Table 23. Troubleshooting WTCA Fan Module unit operation


Fan cable not properly connected Verify proper cable connection.

Fan rotor blocked Clear rotor.

4.3 Reporting faults

If you identify any damage, failure, or fault in a unit, notify Nokia using theFailure Report Form (FRF) provided by your local Nokia representative.

Note

You can save the alarm information to a log file on your laptop with Nokia BTS

Manager software. Remember to attach the alarm log file with the FRF.



Maintenance



5 Replacing GSM/EDGE units

This chapter describes how to replace the units of Nokia UltraSite EDGE BTS.

5.1 Handling units

Figure 3 illustrates the antistatic wrist strap connection.

Warning

Always use the antistatic wrist strap, as shown in Figure 1, when handling

units marked with the Electrostatic Sensitive Device (ESD) sign. Units

carrying the ESD sign are sensitive to electrostatic discharge!

Caution

Keep the units in their packages before installation to protect the units from

humidity.

Caution

Take care when handling units due to their significant weight. For unit

dimensions and weights, see Nokia Ultrasite EDGE Product Descriptions

Manual.



39 (115)

Replacing GSM/EDGE units



Caution

Do not use excessive force when installing units to the RFU backplane

connectors.

Caution

Notify BSC personnel before you replace or add units to Nokia UltraSite BTS.

Note

Before installing replacement units, ensure the new units are the same type and

version as those being removed.

Figure 3 illustrates the antistatic wrist strap connection.



Maintenance



Figure 3. Antistatic wrist strap connection

5.2 Replacing Transceiver units

This section describes how to replace faulty TSxx and BB2x plug-in units.

Power

F r o n t o f c a b i n e t

00111124

Grounding stud

behind front flange

Common

units area

Wrist st r ap

supplies area

To ESD snap

Transmission

units area

ESD snap



41 (115)




Caution

To prevent damage to the backplane connector when removing Transceiver units,

ensure the unit is pulled straight out from the backplane with no upward force.

Note

Over tightening causes stress on the connectors. For the TSxx, BB2x, and BOIx

units, make sure a gap of 1.0 to 3.0 mm exists between the front flange of the unit

and the cabinet when tightened to 1.0 Nm (maximum).

Note

If you want to run the TRX test locally, the TRX must be blocked during the test.

If you want to run the TRX test remotely, you must do it after you unblock the

site.

5.2.1 Replacing the TSxx

This section provides detailed procedures on how to replace a faulty TSxx.

Figure 4 illustrates the order of the TSxx slots.

To remove a TSxx plug-in unit:

1. Unpack the replacement TSxx plug-in unit from its protective package and

check for visible damage.

2. Block the TRX associated with the TSxx with Nokia BTS Manager or

request TRX lock from the BSC.

3. Note the TSxx unit cable configuration.

4. Disconnect the TSxx unit cables.

5. Loosen the unit retaining screws with a T20 Torx driver.



Maintenance



6. Remove the faulty TSxx.

To install a new TSxx unit:

1. Insert the new TSxx unit into the cabinet slot.

2. Tighten the TSxx retaining screws to 1.0 Nm (0.74 ft lb) with a T20 Torx

driver.

3. Connect the TSxx cables.

4. Run the TRX test from Nokia BTS Manager.

5. Use Nokia BTS Manager to unblock the TRX associated with the TSxx. If

the TRX is locked from the BSC, NMS/2000 or NetAct, unlock from the

BSC, NMS/2000 or NetAct (in this case, the reset is automatic).

6. Make a test call.

If the LED is GREEN on the new TSxx unit when you place a test call, the new

TSxx unit is in service. If the LED is YELLOW or RED, check the alarms and

run the TRX test from the BSC, NMS/2000 or NetAct.

Note

Normal TSxx LED indication, when calls are ongoing, is GREEN for both theBCCH TRX and TCH TRX. Normal TSxx LED indication with no ongoing calls

is GREEN for BCCH TRX and YELLOW for TCH TRX.



43 (115)




Figure 4. TSxx unit replacement

5.2.2 Replacing the BB2x unit

Figure 5 illustrates how to replace the BB2x unit.

To remove the BB2x unit:

1. Unpack the BB2x replacement unit from its protective package and check

for visible damage.

Note

Use Nokia BTS Manager to read the BB2x TSxx cross-connection in the BOIx to

determine the TRXs you need to block.

Cabinet front view

00119261

TSxxTSxx

slots

1

2

3

4

5

6

7

8

9

10

11

12



Maintenance



2. Block the TRXs associated with the BB2x with Nokia BTS Manager or

request BCF lock from the BSC.

3. Loosen the upper and lower unit retaining screws.

4. Remove the faulty BB2x unit.

To install a new BB2x unit:

1. Insert the new BB2x unit, pushing it toward the connector.

2. Tighten the unit retaining screws to 1.0 Nm (0.74 ft lb) with a T20 Torx

driver.

3. Use Nokia BTS Manager to run the TRX test for both TRXs.

4. Use Nokia BTS Manager to unblock the TRX associated with the BB2x. If



5. Make a test call on both TRXs.

Figure 5. BB2x unit installation

Cabinet front view

BB2x

1 2 3 4 5 6 BB2x

00119219



45 (115)




5.3 Replacing Transmission units

This section describes how to replace a faulty Transmission unit with the same

type of Transmission unit (for example, FC E1/T1 with FC E1/T1).

Caution

If replacing the FXC RRI, power off Flexbus interface with transmission unit

Manager Software.

Caution

If disconnecting the Flexbus cable, power off Flexbus interface with transmission

unit Manager Software.

Note

Before you disconnect a transmission card, notify the network operator.

Disconnecting transmission units can drop all traffic from Nokia UltraSite EDGE

BTS and affect other Nokia UltraSite EDGE BTSs chained or connected to the

same transmission trunk line.

Note

When replacing the FXC E1 or FC E1/T1, you can ground the outer conductor of

the 75 & RX-connector capacitively or directly. If you remove the grounding

bridge connecting the TX and RX connectors, the grounding becomes capacitive.



Maintenance



Note

You can install only one FC E1/T1 Transmission unit per cabinet, and you must

use slot 1 (far left). You can install up to four FXC transmission units and you

must install one of the units in slot 1. FC and TXC E1/T1 units cannot be used

together in the same cabinet.

5.3.1 Removing Transmission units

To remove an old Transmission unit:

1. Block the BCF locally with Nokia BTS Manager or request BCF lock from

the BSC.

2. If required, save the node file before removing the unit to save the settings.

3. Remove the two screws from the Transmission unit cover (see Figure 6 ).

4. Pull the bottom of the Transmission unit cover away from the EMC Shield

box while you pull down to release the tab. Set the cover aside until you

reconnect the interface cables.

5. Disconnect the Transmission unit cables.

6. Loosen the upper and lower retaining screws of the unit with a T10 Torx

driver.

7. Uninstall the unit logically so that all the unit settings are removed from the

node.

8. Remove the Transmission unit by pulling the unit out from the front.



47 (115)




Figure 6. Transmission unit cover removal

5.3.2 Installing a new Transmission unit

To install a new Transmission unit:

1. Unpack the Transmission replacement unit from its protective package and


2. Insert the new Transmission unit into the unit slot, and push the unit

towards the connector of the backplane.

Caution

You may have to slightly lift the rear of the Transmission unit to ensure proper

positioning of the connectors. Do not force the unit into the cabinet as it may

damage the unit or the backplane

00200016

Transmissionunit cover

Transmissionunit cover, removed

Tab

Slot

Cablesleeve

Cabinet front view

Screws



Maintenance



3. Tighten the upper and lower retaining screws to 1.0 Nm (0.74 ft lb) with a

T20 Torx driver.

4. Reconnect the unit cables.

5. Replace the Transmission unit cover on the EMC Shield box.

6. Replace the two screws in the Transmission unit cover and tighten them

until the cover is flush on the EMC Shield box.

7. Use Nokia BTS Manager to unblock the TRX associated with the TSxx. If



Figure 7. Transmission unit replacement

5.3.3 Replacing a slave (other unit than in slot 1) Transmission unit

To replace a slave Transceiver unit:

1. Remove the slave unit without unistalling it, and insert the new unit. This

replacement method retains the cross-connections and other node settings

from the unit being replaced.

Cabinet front view

VXxx units

1 2 3 4

VXxx unit

00119234



49 (115)




Note

If the replacement unit has been previously used in a node, the unit must be reset

to Factory defaults before the setting can be restored with the Restore Backup

Settings function.

2. Select Maintenance Â Restore Backup Settings... and select the node

backup file, node offline or site configuration file for the node.

3. Select only the unit for which the settings should be sent and click Send.

Note

The Restore Backup Settings feature requires that the equipping of the

transmission units in UltraSite BTS hub matches the node file. Units cannot be

added or removed while using Restore Backup Settings command.

5.3.4 Replacing a master (slot 1) Transmission unit

To replace a master Transmission unit:

1. Remove the master unit without uninstalling it, and insert the new unit.

Because all nod settings are saved in the master unit, both the node and

unit settings must be restored from the backup file.

2. Reset node to Factory defaults from MaintenanceÂ Resets... and wait for

the process to finish and for the units to become installed again.

Note

If the replacement unit has been previously used in a node, the unit must be reset

to Factory defaults before the setting can be restored with the Restore Backup

Settings function.

3. Select Maintenance Â Restore Backup Settings... and select the node

backup file, node offline or site configuration file for the node.



Maintenance



4. Choose Select All for retrieval of all settings and click Send.

Note

The Restore Backup Settings feature requires that the equipping of the

transmission units in UltraSite BTS hub matches the node file. Units cannot be

added or removed while using Restore Backup Settings command.

5.3.5 Saving node information to a backup file

All node information can be saved in a file for later use, regardless of the mode.

This file can then be used to restore settings to an individual unit or the wholenode, if required. For the ITN release, C2.0 transmission unit software to site

configuration file formats are supported. It can be saved with the extension .dat

(for the node offline file) or the new extension .xml. It is recommended that the

backup node file is saved in .dat format.

To save node information to a backup file:

1. Connect to the transmission node locally with Nokia UltraSite BTS Hub

Manager software. The software unit starts and connects to the node.

2. Click each unit once in the Equipment window so that the information isread and can be saved.

3. Choose Save As from the File menu and specify a name and location for

the node file.

4. Quit Nokia UltraSite BTS Hub Manger.

5.3.6 Importing FC E1/T1 Transmission unit information

The following procedure describes how to import configuration information after

replacing the FC E1/T1 Transmission unit.

To import FC E1/T1 configuration information:

1. In Nokia UltraSite BTS Manager choose Open on the Transmission menu.

The Manager software starts and connects to the transmission unit.

2. Choose Open from the File menu. Nokia E1/T1 Manager asks if you want

to disconnect the current connection.



51 (115)




3. Click Yes.

4. Select the node file and click Open. The equipment view opens on the

screen.

5. Choose Send All from the Connection menu.

6. Nokia E1/T1 Manager asks if you want to send all management data to the

node, click Yes. The Nokia E1/T1 Manager starts and sends the

information to the node.

7. Quit Nokia E1/T1 Manager.

5.4 Replacing Base Operations and Interfaces unit

The BOIx unit monitors the control functions common to all other units: O&M

functions, main clock functions, and external alarm collection.

Figure 8 illustrates how to replace the BOIx unit.

To remove the BOIx unit:

1. Unpack the replacement BOIx unit from its protective package and check

for visible damage.

2. Block the BCF locally with Nokia BTS Manager, or request BCF lock

from the BSC.

3. Loosen the upper and lower retaining screws on the unit.

4. Remove the faulty BOIx unit.

To install a new BOIx unit:

1. The BOIx unit may be installed only in the extreme right slot of the

common rack area. Insert the new BOIx unit, pushing it toward theconnector.

2. Attach the rubber cover to the BOIx unit (in outdoor installations).


driver.



Maintenance



4. Unblock the BCF with Nokia BTS Manager and make BCF reset. If the

BCF is locked from the BSC, NMS/2000 or NetAct, unlock from the BSC,

NMS/2000 or NetAct (in this case, reset is automatic).

Figure 8. BOIx unit replacement

5.5 Replacing Power Supply unitsThis section describes how to replace faulty power supply units.

5.5.1 Replacing PWSA/PWSB units

Figures 9 and 10 illustrate how to replace faulty PWSA (AC) and PWSB (-48

VDC) power supply units.

Note

Removing all PWSA/PWSB units from a BTS drops all traffic from Nokia

UltraSite BTS and affects other BTSs chained or connected to the same

transmission node. If one PWSx unit is defective but working, install the new

PWSx in the open slot and power it on before you remove the faulty PWSx. This

prevents interruption of service.

Common

rack areaBOIx

Rubber

cover

00119222

Cabinet front view

BOIx



53 (115)




To remove a PWSA/PWSB unit:

1. Unpack the replacement PWSA/PWSB unit from its protective package

and check for visible damage.

2. Turn the faulty PWSA/PWSB unit to the STAND BY mode.

3. Loosen the PWSx unit retaining screws with a T20 Torx driver.

4. Remove the faulty PWSA/PWSB unit from the cabinet.

To install a new PWSA/PWSB unit:

Caution

Ensure the new unit is in STAND BY mode.

1. Insert the new PWSA/PWSB unit in the unit slot from the front of the

cabinet. Push the unit toward the connector.

2. Tighten the retaining screws to 1.0 Nm (0.74 ft lb) with a T20 Torx driver.

3. Turn the PWSA/PWSB unit ON.

Figure 9. PWSA unit replacement

PWSA

Cabinet front view

PWSA units

1 2

00119191



Maintenance



Figure 10. PWSB unit replacement

5.5.2 Replacing PWSC units

Figure 11 illustrates how to replace faulty PWSC (+24 VDC) power supply units.

Warning

Mains power must be removed from the BTS prior to servicing PWSC units.

To remove a PWSC unit:

1. Notify the appropriate personnel and block the BCF either locally using

Nokia BTS Manager or request BCF lock from the BSC.

2. Switch the PWSC units to standby mode.

3. Switch the mains power breaker OFF.

4. Remove the protective rubber boots from the power input cable terminals

and remove the cables from the front of the PWSC.

5. Loosen the PWSC unit retaining screws with a T20 Torx driver.

PWSB

Cabinet front view

PWSB units

00119207

3 2 1



55 (115)




6. Remove the faulty PWSC unit from the cabinet.

To install a new PWSC unit:

1. Remove the PWSx unit from its protective package and check for visible

damage.

2. Ensure the power supply switch of the PWSC unit is in STAND BY

position.

3. Slide the PWSC unit into the cabinet. Ensure the locating pins are within

the cabinet locating holes.

Note

Ensure the locating pin for the power supply connector engages with the locating

hole in the rack.

4. Tighten the PWSC retaining screws to 1.0 Nm (0.74 ft lb).

5. Install the power input cables on the new PWSC unit.

6. Torque power input fasteners to 10 Nm (7.0 ft lb).

7. Install protective rubber boots over the input cable terminal connections.

Ensure complete coverage of the terminal hardware.

8. Switch mains power breaker ON.

9. Switch the PWSC units to ON.

10. Unblock the BCF either locally using Nokia BTS Manager or from the

BSC.

11. Recycle the packing material.



Maintenance



Figure 11. PWSC unit replacement

5.6 Replacing combiner units

This section describes how to replace the WCxx and RTxx units

5.6.1 Replacing Wideband Combiner units

Figure 12 illustrates how to replace WCxx units.

To remove WCxx units:

1. Unpack the replacement WCxx unit from its protective package and check

for visible damage.

2. Block the TRXs associated with the WCxx unit to be replaced either locally with Nokia BTS Manager, or request TRX lock from the BSC.

3. Note the unit cable configuration.

4. Disconnect the unit cables.


PWSC

Cabinet front view

2 x PWSC

1 2

0122388



57 (115)




6. Remove the faulty unit.

To install new WCxx units:

1. Insert the new unit into the cabinet slot.


driver.

3. Connect the unit cables.


BSC.

5. Make a test call on the TRXs.

Figure 12. WCxx unit replacement

Cabinet front view

00119297

WCxA

WCxA



Maintenance



5.6.2 Replacing Remote Tune Combiner units

This section describes how to replace RTxx units.

Note

To prevent traffic interruption following replacement of RTxx units, Nokia

recommends that Hot insertion of RTxx units is not performed.

Figure 13 illustrates how to replace RTxx units.

To remove RTxx units:

1. Unpack the replacement RTxx unit from its protective package and check

for visible damage.



3. Switch the PWSx units to standby mode.





To install a new RTxx unit:



driver.


4. Switch the PWSx units to ON.


BSC.



59 (115)




6. Make a test call to the associated TRXs.

Figure 13. RTxx unit replacement

5.7 Replacing Multicoupler units

This section describes how to replace Multicoupler units.

Figures 14 and 15 illustrate how to replace M2xA and M6xA units.

To remove Multicoupler units:

1. Unpack the new Multicoupler unit from its protective package and check

for visible damage.

2. Block the TRXs associated with the M2xA or M6xA to be replaced locally

with Nokia BTS Manager or request TRX lock from the BSC.

00119316

RTxx #1

RTxx #2

Cabinet front view

RTxx



Maintenance







To install new Multicoupler units:



driver.


4. Use Nokia BTS Manager to unblock the TRXs associated with the

replaced M2xA or M6xA unit and reset the TRXs. If the TRX is locked

from the BSC, NMS/2000 or NetAct, unlock from the BSC, NMS/2000 or

NetAct (in this case, reset is automatic).




61 (115)




Figure 14. M2xA unit replacement

00119246

M2xA M2xA

Cabinet front view

1

2

3

4

5

6

7



Maintenance



Figure 15. M6xA unit replacement

5.8 Replacing Duplexer units

This section describes how to replace DVxx units.

Note

To prevent traffic interruption following replacement of DVxx units, Nokia

recommends that Hot insertion of DVxx units is not performed.

Figure 16 illustrates how to replace DVxx units.

00119258

M6xA #1

M6xA #2

M6xA

Cabinet front view



63 (115)




To remove DVxx units:

1. Unpack the replacement DVxx unit from its protective package and check

for visible damage.



3. Switch the PWSx units to standby mode.





To install a new DVxx unit:



driver.


4. Switch the PWSx units to ON.


BSC.




Maintenance



Figure 16. DVxx unit replacement

5.9 Replacing IBBU components

This section describes how to replace the following IBBU components:

.

ADUx. CCUx

. BATx

00119304

Cabinet front view

DVxx

slots

DVxx

1

2

3

4

5

6



65 (115)




5.9.1 Replacing the ADUx unit

To replace the ADUx unit in the IBBU:

1. Block the BCF locally with Nokia BTS Manager or request BCF lock from

the BSC.

2. Loosen the four M4 screws that secure the ADUx unit cover to the ADUx

unit, and remove the cover.

Warning

Failure to switch off all AC and DC breakers prior to ADUx removal can

result in hazardous voltage discharges.

3. Switch off all AC and DC breakers on the ADUx.

4. Remove the four M4 screws on the ADUx front.

5. Slide the ADUx unit out of the cabinet, ensuring that the cables do not

become entangled.

6. Remove all cables from the ADUx.

7. To install the ADUx unit see Unit Installation in this manual.

8. Unblock the BCF.

5.9.2 Replacing the CCUx unit

To replace the CCUx unit:

1. Remove the CCUA unit fuse (glass tube) on the front of the ADUx.

2. Remove the faulty CCUA unit.

3. Insert a new CCUA unit into the ADUx unit.

4. Replace the CCUA fuse.



Maintenance



5.9.3 Replacing the BATx unit

To replace the BATx unit:

1. Remove the two M4 screws on the BATx unit.

2. Slide the BATx out of the cabinet.

3. To install the BATx unit see Unit Installation in this manual.

5.9.4 Replacing the BBAx

Warning

Ensure the battery circuit breaker is in the OFF position before starting this

procedure.

Warning

Never connect or disconnect the battery cable from the ADUx when the

other end of the lead is connected to the batteries.

Warning

Always disconnect the positive battery lead before the negative lead.

Warning

As the cabinets are positive earthed, to minimise the risk of short circuits

while the battery leads are loose, always connect the negative battery lead

before the positive lead.



67 (115)




To remove the BBAx unit:

1. Switch the battery circuit breaker to the OFF position.

2. Disconnect the lead of the bridging cable connected to the positive terminal

of the BBAx unit in the upper battery box.

3. Disconnect the remaining lead of the bridging cable from the negative

terminal of the BBAx unit in the lower battery box.

4. Remove the vent tube from the BBAx units in the battery box you need to

remove.

5. Remove the two M4 screws securing the battery box to the cabinet shelf.

6. Slide the battery box out of the cabinet.

7. Disconnect the remaining lead connected to the BBAx unit in the battery

box and route the lead clear of the battery terminals.

8. Remove the terminal bridge between the BBAx units.

9. Remove the cover plate from the BBAx you are replacing.

10. Carefully lift the BBAx unit from the battery box.

11. To install the BBAx unit see Unit Installation in this manual.



Maintenance



6 Replacing WCDMA units

Warning

Always use the antistatic wrist strap when handling units marked with the

Electrostatic Sensitive Device (ESD) sign. Units carrying the ESD sign are

sensitive to electrostatic discharge.

Caution

Keep the WCDMA units in their packages until installation to protect the unit

against humidity.

Caution

Handle heavy units with care. The following WCDMA units are considered

heavy: WAF, WTR, WPS and WTCA Fan Module.

Caution

Do not use excessive force when installing WCDMA units to the RF rack

backplane connectors.



69 (115)

Replacing WCDMA units



Caution

Notify RNC personnel you replace or add WCDMA units to Nokia UltraSite

EDGE BTS.

6.1 WCDMA unit positions

Figure 17 shows the WCDMA unit positions in the lower compartment of Nokia

UltraSite EDGE Base Station.



Maintenance



Figure 17. Nokia UltraSite EDGE BTS with WCDMA units in the lower

compartment of the cabinet

1 WCDMA Transceiver unit (WTR)2 WCDMA Power Amplifier unit (WMP)3 WCDMA Input Combiner unit (WIC)4 WCDMA Antenna Filter unit (WAF)

5 WCDMA Summing and Multiplexing unit (WSM)6 WCDMA Application Manager unit (WAM)7 WCDMA Signal Processor unit (WSP)8 WCDMA Power Supply unit (WPS)9 WCDMA System Clock unit (WSC)10 ATM Multiplexer unit (AXU)11 Interface unit (IFU)12 WTCA Fan Module13 Transmission unit (VXxx)14 Bias Tee unit (Bias-T)

KEY:

8

5

6 7

1

2

9

2

2

1

1

11

12

14

10

31

3

4 4 4

DN0124686



71 (115)




6.2 Replacing units without affecting ongoing traffic

To replace units and not affect traffic:

1. Before replacing the units, lock the WCDMA BTS sector affected by the

maintenance work.

2. After maintenance work, unlock the WCDMA BTS sector.

3. If the whole WCDMA section of the BTS is concerned, unlock the

WCDMA BTS sectors one by one, then unlock the whole WCDMA

section of the BTS.

6.3 Replacing the units

To remove the WCDMA units with handles (the units in the RF section):

1. Lock the sector affected by the maintenance work.

2. Disconnect the unit front cables.

3. Remove the fixing screws of the unit.

4. Carefully remove the plug-in unit from the rack holding from the handle.

To install the WCDMA units with handles:

1. Take the new unit and line up the unit s left and right guide trails to the

guide trails of the rack.

2. Slide the unit in until the rear connector(s) are fully engaged.

Caution

When installing the units, be careful not to damage the backplanes andconnectors.

3. When the unit is in the rack, slightly lift the unit and tighten the screws on

the unit front panel. Lifting the unit eases the tightening. Use a TORX bit

T10 screwdriver.



Maintenance



4. Connect the possible unit front cables.

5. Unlock the sector.

To remove the WCDMA units with ejectors (the units in the baseband

section):

1. Lock the sector affected by the maintenance work.

2. Disconnect the possible unit front cables.


4. Open the ejectors and carefully remove the plug-in unit from the rack. See

Figure 18 how to use the ejectors.

To install the units with ejectors:

1. Take the new unit and carefully slide it into the rack holding the ejectors in

an open position.

2. When the unit is in place, close the ejectors. The ejectors fix the unit

completely so that the rear connector(s) are fully engaged. See Figure 18.

Figure 18. Using the ejectors when installing units in the baseband section

DN0225439

Ejectorsin a closed

position

2

Close theejectors Ejector

Ejector

1



73 (115)




3. When the unit is in place, slightly lift the unit and tighten the screws on the

unit front panel. Lifting the unit eases the tightening. Use a TORX bit T10

screwdriver.

4. Connect the possible unit front cables.

5. Unlock the sector.

6.4 Replacing a WAF unit

The cabinet provides 3 slots for WAF units (WCDMA Antenna Filter units). See

Figure 19.

To remove the WAF unit:

1. Unpack the replacement WAF unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WAF with Nokia WCDMA BTS

Manager or request sector lock from the RNC.



5. Carefully remove the unit from the rack holding from the handle.

To install a new WAF unit:

1. Line up the new WAF unit left and right guide trails to the guide trails of

the rack.


Caution

When installing the WAF, be careful not to damage the backplanes and

connectors.



T10 screwdriver.



Maintenance



4. Connect the unit front cables.

5. Unlock the BTS sector associated with the WAF with BTS Manager or

request an unlock from the RNC.

Figure 19. WAF unit replacement

6.5 Replacing a WMP unit

The cabinet provides 3 slots for WMP units (WCDMA Mini-Linear Power

Amplifier units). See Figure 20.

To remove the WMP unit:

1. Unpack the replacement WMP unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WMP unit with Nokia WCDMA BTS


DN0127177

WAFx

2 31



75 (115)







To install a new WMP unit:

1. Line up the new WMP unit right and left guide trails to the guide trails of

the rack.


Caution

When installing the WMP, be careful not to damage the backplanes and

connectors.



T10 screwdriver.


5. Unlock the BTS sector associated with the WMP with BTS Manager or




Maintenance



Figure 20. WMP replacement

6.6 Replacing a WTR unit

The cabinet provides 3 slots for WTR units (WCDMA Transmitter and Receiver

unit). See Figure 21.

To remove the WTR unit:

1. Unpack the replacement WTR unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WTR unit with Nokia WCDMA BTSManager or request sector lock from the RNC.




DN0127465

WMPx

1

2

3



77 (115)




To install a new WTR unit:

1. Line up the new WTR unit right and left guide trails to the guide trails of

the rack.


Caution

When installing the WTR, be careful not to damage the backplanes and

connectors.

3. When the unit is in the rack, slightly lift the unit and tighten the screws onthe unit front panel. Lifting the unit eases the tightening. Use a TORX bit

T10 screwdriver.


5. Unlock the BTS sector associated with the WMP with BTS Manager or


6. Make a test call.



Maintenance



Figure 21. WTR replacement

6.7 Replacing a WIC unit

The cabinet provides 1 slot for WIC units (WCDMA Input Combiner units). See

Figure 22.

To remove the WIC unit:

1. Unpack the replacement WIC unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WIC unit with Nokia WCDMA BTSManager or request sector lock from the RNC.




1

2

3

DN0127453

WTRx



79 (115)




To install a new WIC unit:

1. Line up the new WIC unit right and left guide trails to the guide trails of

the rack.


Caution

When installing the WIC, be careful not to damage the backplanes and

connectors.

3. When the unit is in the rack, slightly lift the unit and tighten the screws onthe unit front panel. Lifting the unit eases the tightening. Use a TORX bit

T10 screwdriver.


5. Unlock the BTS sector associated with the WIC with BTS Manager or


Figure 22. WIC replacement

DN0127477

WICx



Maintenance



6.8 Replacing a WSM unit

The cabinet provides 1 slot for WSM units (WCDMA Summing and

Multiplexing units). See Figure 23.

To remove the WSM:

1. Unpack the replacement WSM unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WSM unit with Nokia WCDMA BTS




5. Open the ejectors and carefully remove the unit from the rack.

To install a new WSM unit:

1. Insert the new WSM unit into the cabinet slot holding the ejectors in an

open position.


completely so that the rear connector(s) are fully engaged.



screwdriver.


5. Unlock the BTS sector associated with the WSM with BTS Manager or




81 (115)




Figure 23. WSM replacement

DN0127508

WSMx

WSMx

Bus Cabledn994106from connector X92in the RF Rack

Bus Cabledn994106from connector X93in the RF Rack



Maintenance



6.9 Replacing a WAM unit

The cabinet provides 2 slots for WAM (WCDMA Application Manager) units.

See Figure 24.

To remove the WAM:

1. Unpack the replacement WAM unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WAM unit with Nokia WCDMA BTS




To install a new WAM unit:

1. Insert the new WAM unit into the cabinet slot holding the ejectors in an

open position.





screwdriver.

4. Re-commission the WCDMA BTS. Refer to Nokia WCDMA BTS

Commissioning .

5. Unlock the BTS sector associated with the WSP with BTS Manager or




83 (115)




Figure 24. WAM replacement

6.10 Replacing a WSP unit

The cabinet provides 5 slots for WSP (WCDMA Signal Processor) units. See

Figure 25.

To remove the WSP:

1. Unpack the replacement WSP unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WSP unit with Nokia WCDMA BTS




DN0127492

WAMx

21



Maintenance



To install a new WSP unit:

1. Insert the new WSP unit into the cabinet slot holding the ejectors in an

open position.





screwdriver.



Figure 25. WSP replacement

6.11 Replacing a WPS unit

The cabinet provides 1 slot for WPS (WCDMA Power Supply) unit. See Figure

26 .

DN0127489

WSPx

12345



85 (115)




To remove the WPS:

1. Unpack the replacement WPS unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WPS unit with Nokia WCDMA BTS


3. Switch the BTS power OFF from the WPS unit switch.

4. Disconnect the power cable from the unit front panel.



To install a new WPS unit:

1. Insert the new WPS unit into the cabinet slot holding the ejectors in an

open position.





screwdriver.

4. Connect the power cable to unit front panel.

5. Switch the BTS power ON from the WPS unit switch.





Maintenance



Figure 26. WPS replacement

6.12 Replacing a WSC unit

The cabinet provides one slot for a WSC (WCDMA System Clock) unit and one

slot for a redundant WSC. See Figure 27 .

DN0124698

WPSx

Power Cable extension

Blue

Black

WPSx



87 (115)




To remove the WSC:

1. Unpack the replacement WSC unit from its protective package and check

for visible damage.

2. Lock the sector associated with the WSC unit with Nokia WCDMA BTS




To install the WSC unit:

1. Insert the new WSC unit into the cabinet slot holding the ejectors in an

open position.





screwdriver.

4. Unlock the BTS sector associated with the WSC with BTS Manager or




Maintenance



Figure 27. WSC replacement

6.13 Replacing the AXU unit

The cabinet provides 1 slot for the AXU unit (ATM Cross-connect unit). See

Figure 28.

To remove the AXU:

1. Unpack the replacement AXU unit from its protective package and check

for visible damage.

2. Lock the sector associated with the AXU unit with Nokia WCDMA BTS





WSCx

DN0127511

2

1



89 (115)




To install a new AXU unit:

1. Insert the new AXU unit into the cabinet slot holding the ejectors in an

open position.





screwdriver.


5. Commission the AXC. Refer to Nokia AXC Commissioning .

6. Unlock the BTS sector associated with the AXU with BTS Manager or


Figure 28. AXU replacement

AXUx

DN0127438



Maintenance



6.14 Replacing the IFU unit

The cabinet provides 1 slot for the IFU unit (Interface unit). See Figure 29.

To remove the IFU:

1. Unpack the replacement IFU unit from its protective package and check for

visible damage.

2. Lock the sector associated with the IFU unit with Nokia WCDMA BTS





To install a new IFU:

1. Insert the new IFU unit into the cabinet slot holding the ejectors in an open

position.





screwdriver.


5. Unlock the BTS sector associated with the IFU with BTS Manager or




91 (115)




Figure 29. IFU replacement

6.15 Replacing the WTCA Fan Module

The cabinet provides 1 slot for the WTCA Fan Module. See Figure 30.

To remove the WTCA Fan Module:

1. Unpack the new WTCA Fan Module from its protective package and


2. In Outdoor installation, remove the WTCA Fan Module front cover.

3. Lock the sector associated with the WTCA Fan Module with Nokia

WCDMA BTS Manager or request sector lock from the RNC.

4. Switch the BTS power OFF from the WPS unit switch.

5. Disconnect the WTCA Fan Module front cables.

IFUx

DN0127441



Maintenance



6. Remove the fixing screws of the WTCA Fan Module.

7. Remove the faulty WTCA Fan Module.

To install a new WTCA Module:

1. In Outdoor installation, make sure the WTCA Fan Module front cover is

removed.

2. Fit the new WTCA Fan Module to the BTS cabinet.

3. Tighten the fixing screws of the WTCA Fan Module.

4. Connect the WTCA Fan front cables.

5. Unlock the BTS sector associated with the WTCA Fan Module with BTS

Manager or request an unlock from the RNC.

6. Switch the BTS power ON from the WPS unit switch.

Figure 30. WTCA Fan replacement

DN0129109

WTCA Fan Modulefor Outdoor cabinet

cover plate removed

WTCA Fan Modulefor Indoor cabinet

cover plate installed



93 (115)






Maintenance



7 Replacing parts of the cabinet core

This chapter describes how to replace parts of the Nokia UltraSite GSM/EDGE

and WCDMA BTS cabinet core.

Warning

Potentially lethal voltages!

Switch OFF the BTS power from a disconnecting device or circuit breaker

before starting the maintenance work whenever the nature of maintenance

work causes a risk of electric shocks!

7.1 Replacing GSM/EDGE fans

Warning

When replacing fans within the BTS, the new fans may start operation when

the power/signal cable is connected.

The Temperature Control System (TCS) of Nokia UltraSite GSM/EDGE BTS

consists of the following components:

. Unit Cooling fans 11 units in the cabinet core (seven unit fans in Midi

cabinet)

. Cabinet Cooling fan one unit in the OAKx door

. Heater one optional unit for the OAKx door

This section describes how to replace unit fans and the Cabinet Cooling fan.



95 (115)

Replacing parts of the cabinet core



For additional product information, see Nokia UltraSite EDGE Temperature

Control System Product Description.

7.1.1 Replacing Unit Cooling fans

Eleven Unit Cooling fans in the cabinet (seven fans in the Midi cabinet) maintain

proper airflow to the Power Supply units, common unit and transmission area,

Transceivers and RF filter units. Four screws secure each fan to the cabinet core

and two finger screws with moulded connectors secure the power/signal cable.

This section describes how to replace the Power Supply cooling fans.

Figure 31 illustrates the location of the Unit Cooling fans in the cabinet.

To remove Power Supply Unit Cooling fans:

1. Before you remove a unit fan, unpack the replacement unit fan from its

protective package and check for visible damage.



3. Switch the Power Supply units to standby mode.

4. Carefully remove the Power Supply units.

5. Disconnect the power/signal cable for the fan.

6. Remove the four securing screws in the fan box with a T15 Torx driver.

7. Remove the faulty fan unit.

To install new Power Supply Unit Cooling fans:

1. Insert the new fan into the cabinet and align with the screw holes.

2. Insert and tighten the four screws in the corners of the fan box with a T15Torx driver.

3. Connect the power/signal cable.

4. Replace the Power Supply units.

5. Switch the Power Supply units to ON.



Maintenance



6. Unblock the BCF.

To remove the Common Unit Cooling fan:

1. Before you remove the Common Unit Cooling fan, unpack the

replacement unit fan from its protective package and check for visible

damage.


BTS Manager or request BCF lock from the BSC.

3. Carefully remove the BB2x units and the BOIx unit.


5. Remove the four retaining screws in the corners of the fan box with a T15Torx driver.


To install a new Common Unit Cooling fan:


2. Insert and tighten the four retaining screws in the corners of the fan box

with a T15 Torx driver.

3. Connect the power/signal cable for the fan.

4. Replace the BB2x units and the BOIx unit.

5. Unblock the BCF.

To remove the RF Filter Unit Cooling fan:

1. Before you remove the RF Filter Unit Cooling fan, unpack the new unit fan

from its protective package and check for visible damage.

2. Notify the appropriate personnel and block the appropriate sector/TRXs

locally using Nokia BTS Manager.


4. Carefully remove the DVxx, RTC, or WCxx unit.




97 (115)




6. Remove the four retaining screws in the corners of the fan box with a T15

Torx driver.


To install a new RF Filter Unit Cooling fan:


2. Replace and tighten the four screws in the corners of the fan box with a

T15 Torx driver.


4. Replace the DVxx, RTC, or WCxx unit in the cabinet.

5. Connect the cables to the unit.

6. Unblock the TRXs for the sector.

To remove the Transceiver Unit Cooling fans:

1. Before you remove the Transceiver Unit cooling fan, unpack the new unit

fan from its protective package and check for visible damage.

2. Notify the appropriate personnel and block the appropriate sector/TRXs

using Nokia BTS Manager.


4. Carefully remove TSxx units making note of the cable routing.


6. Remove the four screws in the corners of the fan box with a T15 Torx

driver.


To insert a new Transceiver Unit Cooling fan:


2. Replace and tighten the four screws in the corners of the fan box with a

T15 Torx driver.



Maintenance




4. Replace the TSxx units into the cabinet.

5. Connect the cables to the units.

6. Unblock the TRXs for the sector.

Figure 31. Unit cooling fan locations

00130035

TSxx fan 1*

TSxx fan 2*

TSxx fan 3*

TSxx/IBBU fan 4

TSxx/IBBU fan 5

TSxx/IBBU fan 6

UltraSite cabinet core UltraSite MIDI cabinet core

Common units fan*

RF Filter fan 1, horizontal

mount*

Power fan, 1*

Power fan, 2*

*Same location in MIDI cabinet

RF Filter fan 2, horizontal

mount (not used in IBBU

configurations)



99 (115)




7.1.2 Replacing the Cabinet Cooling fan

This section describes how to replace the Cabinet Cooling fan.

Figure 32 illustrates how to replace the Cabinet Cooling fan in the OAKx door.

To remove the Cabinet Cooling fan:

1. Before you remove the Cabinet Cooling fan, unpack the new Cabinet Fan

from its protective package and check for visible damage.

2. Open the cabinet door to access the cabinet fan assembly.

3. Disconnect the power/alarm cable for the fan and disconnect the cable

from the cable clips.

Warning

Ensure the fan has stopped rotating before removing the cabinet fan cover.

4. Remove the five T25 screws securing the cabinet fan cover to the door and

set the cover aside.

5. Remove the cable from the cable clip inside the fan box and cut the cabletie.

6. Remove the four remaining T25 screws on the back side of the box to

remove the cabinet fan.

To install a new Cabinet Cooling Fan:

1. Insert the new Cabinet Fan into the Cabinet Fan box.

2. Replace the four T25 screws to secure the Cabinet Fan assembly.

3. Route the power/alarm cable through the cable clips and replace the cable

tie.

Caution

The power/alarm cable will be damaged if not properly cable tied.



Maintenance



4. Route the cable through the guide in the Cabinet Fan cover and replace the

T25 screws to secure the Cabinet Fan cover.

5. Connect the power/alarm cable for the fan.

Figure 32. Cabinet Cooling fan replacement

00159448

Location for cabinet fan

Cabinet fanassembly

Cabinet fan cover,with finger guard

Wiring to fan power and control door switch



101 (115)




7.2 Replacing a WCDMA unit cooling fan

To remove the faulty fan:

1. Unpack the new unit cooling fan from its protective package and check for

visible damage.

2. Lock the units for the sector.

3. Remove the WCDMA plug-in unit/s (WTR and WMP) directly in front of

the faulty fan. Place the unit/s aside on an anti-static mat.

Note

For detailed instructions on how to remove WCDMA plug-in units, see section 6

of this document.

4. Disconnect the power/signal cable for the fan with a small flathead

screwdriver.

5. Remove the four securing screws in the corners of the fan box with a T15

Torx driver.


To install a new cabinet cooling fan:

1. Fit the new fan into the BTS cabinet.

2. Connect the fan cable to the cabinet interface connector.

3. Insert the new fan into the cabinet and align with the mounting holes.

4. Re-insert and tighten the four securing screws in the corners of the fan box

with a T15 Torx driver.

5. Connect the power/signal cable for the fan with a small flathead

screwdriver.

6. Re-install the plug-in units into the cabinet.

7. Re-connect the cables to the units.



Maintenance



8. Unlock the units for the sector.

7.3 Replacing the GSM/EDGE heater (HETA) unit

This section describes how to replace the heater (HETA) unit.

Figure 33 illustrates the location of the HETA unit cables.

Warning

Do not open a faulty HETA unit. Return HETA unit to Nokia Service.

To remove the heater (HETA) unit:

1. Before you remove the heater unit, unpack the new unit from its protective

package and check for visible damage.

2. Disconnect the HETA signalling interface from the door switch box.

3. Remove the cold-start temperature sensor cable from the cabinet.

4. Disconnect the AC power cable for the HETA.

5. Cut any cable ties and remove the cables from the support clips.

6. Unscrew the 12 T25 mounting screws and remove the faulty HETA unit.



103 (115)




Figure 33. HETA unit cables

Figure 34 illustrates how to install the HETA into the OAKx door.

To install a new heater (HETA) unit:

1. Insert the bottom of the new HETA into the OAKx door.

2. Tilt the top of the HETA into the OAKx door.

3. Secure the unit with the 12 T25 retaining screws.

4. Connect the HETA signalling interface to the door switch box.

5. Install the HETA unit cold-start temperature sensor, as illustrated in Figure

35, using cable clamps.

99614804

Cables to CRMx:

- Cold-start sensor

- BOIx/PWSx interfacedoor switch unit (D-9)

- HETA power (IEC)



Maintenance



6. Connect the HETA to the AC Power Supply (IEC plug located behind the

AC Filter unit).

7. Redo the cable ties and clamps.

Figure 34. HETA mounted in OAKx door

00276806Install bottom of HETA unit first

Wiring to HETApower and control

D-9

IEC

Sensor



105 (115)




Figure 35. Sensor cable installation

7.4 Replacing the WCDMA Heat Exchanger Fan

To replace the Heat Exchanger Fan in the Outdoor cabinet door:

1. Unpack the new Heat Exchanger Fan from its protective package and


2. Disconnect the Fan Control Cable from the WTCA Fan Module.

3. Remove the Heat Exchanger cover plate from the Outdoor cabinet door.

See Figure 36 .

4. Unscrew the screws in the fan mounting plate and remove the plate and the

fan.

5. Remove the fan from the mounting plate.

6. Take the new fan and attach it to the fan mounting plate.

7. Connect the Fan Control Cable to the WTCA Fan Module.

8. Install the fan.

Sensor cable from door

mounted HETA unit

Front flange

Route cable behind front flange

of upper rack and secure with

plastic cable clamps

00299331

Upper rack



Maintenance



9. Install the Heat Exchanger cover plate.

Figure 36. Heat Exchanger Fan replacement

Heat Exchanger Fan

Heat Exchanger FanMounting Plate

Heat Exchanger

Cover Plate

DN0223838



107 (115)




7.5 Replacing the WCDMA Heat Exchanger Cell

To replace the Heat Exchanger Cell in the Outdoor cabinet door:

1. Unpack the new Heat Exchanger Cell from its protective package and


2. Remove the Heat Exchanger cover plate from the Outdoor cabinet door.

See Figure 37 .

3. Take hold of the faulty cell from its sides and remove the cell.

4. Check the seals and replace any worn or broken seals.

5. Install the new cell.

6. Install the Heat Exchanger cover plate.



Maintenance



Figure 37. Heat Exchanger Cell replacement

DN0223841

Heat Exchanger Cell

Heat Exchanger Cover Plate



109 (115)




7.6 Replacing a faulty RF backplane

Warning

Permanently wire Nokia UltraSite EDGE BTS to a disconnect device, such

as a circuit breaker.

Warning

Disconnect Nokia UltraSite EDGE BTS from the mains power network with

a dedicated switch. Turning OFF Nokia UltraSite EDGE BTS using the BTS

power supply (PWSx) switch leaves it in STANDBY mode.

Warning

Follow national regulations when working with power supply and power

cables.

To switch the WCDMA BTS power off:

1. At the RNC or NetAct, reroute the traffic from the WCDMA section of the

BTS to the neighbouring BTSs.

2. At the RNC or NetAct, lock the BCF.

3. Switch off the power supply from the Nokia UltraSite Support (Optional).

4. On the BTS site, switch BTS power off from the WPS unit switches.

To replace a faulty RF backplane:

1. Unpack the new RF rack backplane from its protective package and check

for visible damage.

2. Make sure the WCDMA BTS power is OFF.



Maintenance



3. Remove all the plug-in units from the RF rack (WTRs, WMPs and WIC).

Place them aside on an anti-static mat.

Note

For detailed instructions on how to remove plug-in units, see Chapter 6 of this

document.

4. Disconnect the unit cooling fan cables from the front of the RF rack

backplane with a small flathead screwdriver.

5. Unscrew the RF rack mounting screws.

6. Pull the RF rack carefully forward so that you have access to the cables and

to the main busbar at the back.

7. Carefully disconnect each cable and the main busbar from the RF rack

backplane in any order.

8. Take the faulty RF rack out of the BTS.

9. Unscrew and remove the screws holding the RF front IP shield.

10. Remove the RF front IP shield.

11. Remove the faulty RF backplane from the RF rack.

12. Take the new RF backplane and install it to the RF rack.

13. Install the RF rack front IP shield.

14. Install the RF rack. Refer to Nokia UltraSite EDGE Base Station,

WCDMA Upgrade Kit Installation.

15. Re-install the plug-in units. Refer to Nokia UltraSite EDGE Base Station,WCDMA Unit Installation.

To switch power on the WCDMA section of the BTS:

1. Switch on the power supply from Nokia UltraSite Support to the BTS.

2. Switch the BTS power on to the WCDMA section of the BTS from the

WPS unit switch



111 (115)




3. At the RNC or NetAct, unlock the BCF (the GSM/EDGE part of the BTS).

4. At the RNC or NetAct, route the traffic back to the WCDMA section of the

BTS.

7.7 Replacing a faulty BB rack







To replace a faulty BB backplane:

1. Unpack the new BB rack backplane from its protective package and check

for visible damage.


3. Remove all the plug-in units in the RF rack.

Note


document.

4. Remove the RF rack. Refer to Section6

in this document.

5. Remove all the plug-in units from the BB rack (WSM, WAM, WSM,

WPS, WSC, AXU, IFU, WTCA Fan). Place them aside on an anti-static

mat.

6. Pull the BB rack carefully forward so that you have access to the cables at

the back.



Maintenance



7. Carefully disconnect each cable from the RF backplane in any order.

8. Take the faulty BB rack out of the BTS.

9. Remove the faulty BB backplane from the BB rack.

10. Take the new BB backplane and install it to the BB rack.

11. Install the BB rack. Refer to Nokia UltraSite EDGE Base Station,




13. Re-install the plug-in units to the RF rack and to the BB rack. Refer to

Nokia UltraSite EDGE Base Station, WCDMA Unit Installation.




WPS unit switch


4. At the RNC or NetAct, route the traffic back to the WCDMA section of theBTS.

7.8 Replacing a faulty WAF rack









113 (115)




To replace a faulty WAF backplane:

1. Unpack the new WAF backplane from its protective package and check for

visible damage.


3. Remove all the plug-in units in the RF rack.

Note


document.

4. Remove the RF rack. Refer to Section 6 in this document.

5. Remove all the WAF units from the WAF rack. Place them aside on an

anti-static mat.

6. Unscrew and remove the screws holding the WAF rack.

7. Pull the WAF rack carefully forward so that you have access to the cables

at the back.

8. Carefully disconnect each cable from the WAF rack in any order.

9. Take the faulty WAF rack out of the BTS.

10. Remove the faulty WAF backplane from the WAF rack.

11. Take the new WAF backplane and install it to the WAF rack.

12. Install the WAF rack. Refer to Nokia UltraSite EDGE Base Station,




14. Re-install the plug-in units to the WAF rack and to the RF rack. Refer to

Nokia UltraSite EDGE Base Station, WCDMA Unit Installation.



Maintenance






WPS unit switch


4. At the RNC or NetAct, route the traffic back to the WCDMA section of the

BTS.


Maintenance Dn99177651

Documents