GSM BTS S8006 Troubleshooting

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Global System for Mobile Communications (GSM)

Nortel GSM BTS S8006TroubleshootingRelease: V18.0 PC2Document Revision: 18.02

www.nortel.com

411-9001-085.




Release: V18.0 PC2

Publication: 411-9001-085

Document release date: 19 January 2010

Copyright © 2000-2008 Nortel Networks. All Rights Reserved.

While the information in this document is believed to be accurate and reliable, except as otherwise expressly

agreed to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF

ANY KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document aresubject to change without notice.

Nortel, Nortel Networks, the Nortel logo, and the Globemark are trademarks of Nortel Networks.

LEGAL NOTICE

Sourced in Canada, France, and the United States of America

While the information in this document is believed to be accurate and reliable, except otherwise expressly agreed

to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF ANY

KIND, EITHER EXPRESSED OR IMPLIED. The information and/or products described in this document are subject

to change without notice.

Nortel, the Nortel logo, the Globemark, and S8000 are trademarks of Nortel Networks.

All other trademarks are the property of their respective owners.

_ 17+ 18+

All other trademarks are the property of their respective owners.

.



3.

Contents

New in this release 7Features 7

Introduction 9

Chapter 1 Manual user guide 11

1.1 Introduction 111.1.1 Corrective maintenance 11

1.1.2 Preventive maintenance 11

1.1.3 Intervention restrictions 12

1.1.4 Personnel and equipment safety 12

Chapter 2 Description of the cabinet 172.1 Presentation 17

2.2 Composition of the S8006 BTS 17

2.2.1 Introduction 17

2.2.2 Description of an S8006 cabinet 17

2.2.3 Description of the S8006 BTS products 192.2.4 Location 19

2.2.5 Cross-reference between the equipment item and the replacement sheetsfor the S8006 BTS 23

Chapter 3 Description of a start-up 273.1 Introduction 27

3.2 S8006 BTS power supply 27

3.2.1 Power supplies 27

3.2.2 Distribution of power supplies 27

3.2.3 Batteries 27

3.3 S8006 BTS power-on/power-off 33

3.3.1 Power-on procedure 33

3.3.2 Power-off procedure 34

3.4 Start-up phases 35

Chapter 4 Preventive maintenance procedures 414.1 Introduction 41

4.1.1 Presentation 41

Global System for Mobile Communications (GSM)Nortel GSM BTS S8006 Troubleshooting411-9001-085 18.02 19 January 2010




4

4.1.2 Test schedule 42

4.1.3 Replacement schedule 43

4.1.4 Summary of the preventive maintenance schedule 44

4.1.5 Description of a preventive maintenance procedure sheet 45

4.2 On-site checks 46

4.2.1 Preliminary checks before performing preventive maintenanceprocedures 46

4.2.2 Final checks after having performed preventive maintenanceprocedures 46

4.3 Check at the OMC-R 47

4.3.1 Preliminary checks before performing preventive maintenanceprocedures 47

4.3.2 Final checks after having performed preventive maintenanceprocedures 47

4.4 Preventive maintenance procedure sheets 48

4.4.1 Test of the AC lightning protector 48

4.4.2 Test of the CMCF board 56

4.4.3 Test of the door gasket 61

4.4.4 Test of the lightning protectors of the 48 V box 66

4.4.5 Lock lubricating 71

Chapter 5 Replacement procedures 735.1 Introduction 73

5.1.1 Presentation 73

5.1.2 Description of a replacement procedure sheet 73

5.1.3 Preliminary operations 74

5.1.4 Tools 74

5.2 Replacement sheets 765.2.1 Replacement of a CMCF board 77

5.2.2 Replacement of a CPCMI board 81

5.2.3 Replacement of the RECAL board 85

5.2.4 Replacement of an AC box circuit breaker 88

5.2.5 LNS-DACS replacement 98

5.2.6 Replacement of the LNS-DACS control assembly 103

5.2.7 Replacement of the BTS filter 108

5.2.8 Replacement of a LNS-DACS twin blower 110

5.2.9 Replacement of the LNS-DACS gasket 115

5.2.10 Repair or replacement of the door gaskets 118

5.2.11 Replacement of a DRX (or e-DRX) module 131

5.2.12 Replacement of a F-type converter 136

5.2.13 Replacement of the lightning protectors of the 48 V 139

5.2.14 Replacement of a power amplifier (PA) 141

5.2.15 Replacement of the power supply rack 145

5.2.16 Replacement of a rectifier 154

5.2.17 Replacement of a RF-combiner module (H2D) 157





5

5.2.18 Replacement of a Rx-splitter 161

5.2.19 Replacement of the AC lightning protector 165

5.2.20 Replacement of the thermostats 169

Chapter 6 LNS-DACS technical manual 173

6.1 Installation 1736.1.1 Equipment inspection 173

6.1.2 Installation 173

6.1.3 Electrical connections (see label) 174

6.1.4 Filter clog switch connections (see label) 174

6.1.5 Commissioning 175

6.1.6 Other checks 175

6.1.7 Filter clog alarm 175

6.1.8 Air flow failure 175

6.1.9 Damper operation 175

6.1.10 Fan speed 176

6.1.11 Heater circuit failure 176

6.2 Technical aspects 176

6.2.1 Specification 176

6.2.2 Construction 176

6.2.3 Twin blowers 176

6.2.4 Air-directing damper 176

6.2.5 Damper modulating motor 177

6.2.6 Filter clog switch 177

6.2.7 Temperature control elements 177

6.2.8 Heater 178

6.2.9 Heater thermostat 1786.2.10 Rectifier/capacitor assembly 178

6.2.11 Transformer 178

6.2.12 Connection sockets 178

6.2.13 Printed circuit assembly (PCA) for control and power distribution 178

6.2.14 Alarm LEDs 178

6.3 LNS-DACS operation 179

6.3.1 General principles 179

6.3.2 Specific modes 179

6.3.3 Low temperature 179

6.3.4 Medium temperature 179

6.3.5 Normal temperature 1796.3.6 High temperature 179

6.3.7 Fan speed control 180

6.3.8 Control and power distribution assembly 180

6.3.9 Power distribution 180

6.3.10 Control power supplies 181

6.3.11 Temperature sensing 181





6

6.3.12 Ts reference 181

6.3.13 Error amplifier 181

6.3.14 Damper motor drive 181

6.3.15 Heater drive circuit 182

6.3.16 Alarms 182

6.3.17 Critical alarm 1: Heater failure 182

6.3.18 Critical alarm 2: Fan failure 182

6.3.19 Maintenance alarm: Filter clog 183

6.3.20 Controller options 183

6.4 Troubleshooting 183

6.5 Maintenance 185

6.5.1 Cabinet: Examine 185

6.5.2 Modulating motor and linkages: Check 185

6.5.3 Control Assembly: Examine 186

6.5.4 Connections: Examine 186

6.5.5 Blowers: Examine 186

Chapter 7 On-site TIL use 1897.1 Introduction 189

7.2 Preliminary actions 190

7.2.1 Actions at the OMC-R 190

7.2.2 On-site actions 190

7.3 Corrective action sheets 191

7.3.1 Alarm: High temperature alarm 191

7.3.2 Alarm: High power alarm 192

7.3.3 Alarm: Power cabinet alarm 193

7.3.4 Alarm: SWVR alarm 1947.3.5 Alarm: OOL REF alarm 196

7.3.6 Alarm: Asic external link 197

7.3.7 Alarm: OOL alarm 198

7.3.8 Alarm: Automatic level control 199

7.3.9 Alarm: MHD or COM alarm 202

7.3.10 Alarm: Power surge protection 205

7.3.11 Alarm: FH Bus alarm 206

7.4 TX test 207

7.4.1 Introduction 207

7.4.2 TX test procedure 207





7.

New in this release

The following section describe what is new in this release for Nortel GSM BTS S8006 Troubleshooting (411-9001-085) for V18.0 P&C 2 release.

“Features” (page 7)

FeaturesThis document contains no feature updates in this release.





8 New in this release





9.

Introduction

This document describes the corrective and preventive maintenanceprocedures applicable to the S8006 outdoor Base Transceiver Station(BTS).

PrerequisitesIt is recommended that the readers also become familiar with the followingtechnical documents:

• Nortel GSM BSS Documentation roadmap (411-9001-000)

• Nortel GSM BSS Overview (411-9001-001)

• Nortel GSM BSS Fault Management - Maintenance Principles (411-9001-039)

• Nortel GSM BTS S8000/S8002/S8003/S8006 Fault Clearing (411-9001-103)

Readers should also refer to the following:• Nortel GSM BSS Fault Clearing - Advanced Maintenance Procedures

(411-9001-105)

• Nortel GSM OMC-R Commands Reference Objects and Fault menus (411-9001-128)

• Nortel GSM OMC-R Commands Reference - Configuration,Performance, and Maintenance menus (411-9001-129)

• Nortel GSM OMC-R Commands Reference - Security, Administration,SMS-CB, and Help menus (411-9001-130)





10 Introduction

NavigationThis document consists of six chapters.

• Chapter 1 “Manual user guide” (page 11) describes how to use thismaintenance manual.

• Chapter 2 “Description of the cabinet” (page 17) provides a briefdescription of the boards and modules contained in S8006 BTSs.

• Chapter 3 “Description of a start-up” (page 27) describes the procedurefor starting up an S8006 BTS and for monitoring the BTS start-up. Italso provides a brief description of the BTS power supply.

• Chapter 4 “Preventive maintenance procedures” (page 41) provides aguide for maintenance personnel to perform preventive maintenancefor the S8006 BTS. Preventive maintenance allows you to takemandatory actions at scheduled intervals to decrease the number ofproblems that can affect the BTS.

• Chapter 5 “Replacement procedures” (page 73) provides a guide formaintenance personnel to perform replacement procedures to theS8006 BTS. Replacement procedures allow you to replace boards andmodules of the BTS. These procedures are applicable:

— when an item of equipment is faulty

— when an item of equipment has to be replaced according to thepreventive maintenance

• Chapter 6 “LNS-DACS technical manual” (page 173) describesinstallation, maintenance and technical description of the DACS.

• Chapter 7 “On-site TIL use” (page 189) presents the actions tobe taken in the case of the fault number 1067 on the DRX or PAequipment.





11.

Chapter 1 Manual user guide

1.1 Introduction1.1.1 Corrective maintenance

The network maintenance is based on the graphical supervision of thenetwork.

It is also based on the identification and the replacement of faulty items ofequipment, using the alarms and the notifications described in Nortel GSM BSS Fault Management - Maintenance Principles (411-9001-039).

This process is divided into two steps (see Figure 1 "Guide to using themaintenance manual" (page 14)).

• locating and identifying the faulty items of equipment, using informationgiven in Nortel GSM BTS S8000/S8002/S8003/S8006 Fault Clearing (411-9001-103).

• replacing the faulty items of equipment, using the replacement

procedures given in this manual (see Figure 2 "Corrective maintenancediagnostic" (page 15)).

When a faulty item of equipment sends an alarm to the OMC-R,this alarm is identified by a fault number. Nortel GSM BTS S8000/S8002/S8003/S8006 Fault Clearing (411-9001-103) gives theprocedures associated with the various fault numbers.

When a faulty item of equipment triggers several alarms, Nortel GSM BSS Fault Clearing - Advanced Maintenance Procedures (411-9001-105)enables the operator to locate this faulty item of equipment. It also helpsthe operator when an abnormal operation occurs in a BTS, a TCU, a BSC,

PCM links, or on BTS entities.

1.1.2 Preventive maintenanceThe implementation of the preventive maintenance procedures is theresponsibility of each customer.





12 Chapter 1 Manual user guide

Preventive maintenance is used to periodically test the items of equipmentthat do not directly trigger any alarm at the OMC-R. However, theexecution of these procedures may trigger alarms at the OMC-R.

This process is divided into two steps (see Figure 1 "Guide to using the

maintenance manual" (page 14)):

• the test procedures of the items of equipment

• the replacement procedures of the items of equipment

All these procedures are described in this manual.

1.1.3 Intervention restrictionsThere may be a lapse of time between the identification of the alarm at theOMC-R and the time the operator responsible for the intervention arrives atthe site.

The operator must be synchronized with the OMC-R (by telephone) beforean on-site intervention, in the following cases:

• isolating procedure

• intervention because alarms are triggered at the OMC-R

• completion of an on-site intervention

• return to service procedure

1.1.4 Personnel and equipment safety

1.1.4.1 General personnel safety instructionsThe personnel must obey the safety instructions specific to the installationsite:

• rules concerning the premises (see instructions posted on site or inthe building)

• rules linked to the general personnel safety instructions

The personnel working on the cabinet must be authorized to workaccording to the security standards.

The cabinet main external power supply is turned off by opening the circuitbreaker on the operator box.

The mains power supply supplying the cabinet means that no work mustbe done on the cabinet internal wiring without first cutting its externalmains power supply.





1.1 Introduction 13

This BTS has been evaluated under IEEE C95.1 (Institute of Electrical andElectronics Engineers C95.1) requirements, regarding safety levels withrespect to human exposure to radio frequency electromagnetic fields, 3kHz to 300 GHz.

The leakage fields and equivalent power densities are orders of magnitudeless than the maximum permissible exposures (MPEs) given in the IEEEsafety guidelines.

1.1.4.2 Equipment safety instructionsThe maintenance of an S8002 BTS is possible up to -40 C (~ -40 F).

The BTS stays operational with the open doors at -10 C (~ -14 F) duringthree hours, and at -40 C (~ -40 F) during one hour.

In the case of rainy or snowy weather, do not open the cabinet doors

without a tent set up beforehand.

CAUTIONESDS handling precautionsDuring every maintenance intervention, and especially whenhandling the boards, the operator must wear an antistaticbracelet.

DANGERElectric shockNever replace a power supply when energized.






Figure 1Guide to using the maintenance manual





1.1 Introduction 15

Figure 2Corrective maintenance diagnostic





17.

Chapter 2 Description of the cabinet

2.1 PresentationThe description of the cabinet is given for the S8006 outdoor BTS (forGSM 1800).

2.2 Composition of the S8006 BTS2.2.1 Introduction

The S8006 BTS contains one outdoor cabinet (no extension or externalcabinet).

2.2.2 Description of an S8006 cabinetThe S8006 cabinet contains two compartments (see Figure 4 "Overview ofan S8006 BTS cabinet" (page 20)):

• one main compartment

• one top compartment

2.2.2.1 Description of the main compartmentThe main compartment of the S8006 cabinet contains, in its maximumconfiguration, the following elements (see Figure 5 "Maximum equipmentof an S8006 BTS cabinet" (page 21)):

• one Compact BCF (CBCF) subsystem that contains the followingelements:

— one Compact PCM Interface board (CPCMI)

— one Compact Main Common Functions board (CMCF)

— one interconnection BCF ICO board

— one CBCF interconnection Back Panel module (CBP)

• one REmote Control and ALarm board (RECAL)

• six TRXs, made up:

— six DRXs (or e-DRXs)

— six Power Amplifiers (PAs)





18 Chapter 2 Description of the cabinet

• RF-combiner modules that are six H2D RF-combiners, each composedof:

— one duplexer

— one LNA-combiner module

— one hybrid coupler

— one VSWR-combiner module (optional)

• one COMbiner InterCOnnection panel (COMICO)

• one F-type converter

• six reception couplers (Rx-splitters)

• one power supply rack that contains the following elements:

— five rectifiers

— one Power Control Unit (PCU)

• one high temperature thermostat located above the CBCF

• one low temperature thermostat located under the power supply rack

• one single-phase AC box that contains the following elements (seeFigure 6 "AC box of the S8006 BTS" (page 22)):

— two supply filters

— the main circuit breaker

— the climatic system circuit breaker

— the rectifier circuit breaker

— one AC lightning protector

• lightning protection modules (optional):

— lightning protection modules type 1:

– one 48-V box (lightning protectors)

• the BTS filters located in the doors

• one SiteFlash cables kit (NTQA79CA) is mandatory whenimplementing a satellite ABIS connection. It is used to update thenominal software of theCBCF, DRX or eDRX modules, allowing theBTS to synchronize on the network. The kit includes:

— one cable dedicated to an eDRX or DRX connection (NTQA3372)

— one cable for a CBCF connection (through the CMCF board)(NTQA3370)






2.2.2.2 Description of the top compartmentThe top compartment contains one LNS-DACS that mainly includes thefollowing elements (see Figure 4 "Overview of an S8006 BTS cabinet"(page 20)):

• twin blowers• one air-directing damper

• one heater element

• one heater thermostat

• one transformer

• one printed circuit assembly (PCA) for control and power distribution

2.2.3 Description of the S8006 BTS productsThe S8006 BTS contains six DRXs (or e-DRXs) in maximum configuration.

Figure 3Maximum configuration of an S8006 BTS

2.2.4 LocationThe equipment is given a number according to its position in the cabinet,and the type of element (see Figure 5 "Maximum equipment of an S8006BTS cabinet" (page 21)).






Figure 4Overview of an S8006 BTS cabinet






Figure 5Maximum equipment of an S8006 BTS cabinet






Figure 6AC box of the S8006 BTS






2.2.5 Cross-reference between the equipment item and the replacementsheets for the S8006 BTS

Table 1LNS-DACS climatic system in the S8006 BTS

Equipmenttype

Equipment

numberLocation

Testsheet

Replacement sheet

LNS-DACS - Top compart

ment -

5.2.5 “LNS-DACS replacement”

(page 98)

Table 2DRX (or e-DRX) location in the S8006 BTS

Equipment type

Equip

mentnumber Location

Test

sheet Replacement sheet

DRX or e-DRXDRX or e-DRXDRX or e-DRXDRX or e-DRXDRX or e-DRXDRX or e-DRX

012345

DRX 0DRX 1DRX 2DRX 3DRX 4DRX 5

- 5.2.11 “Replacement of a DRX (or

e-DRX) module” (page 131)

Table 3F-type converter location in the S8006 BTS

Equipment type Equipmen

t number Location

Test


Converter_F 0 F power

supply 0 -

5.2.12 “Replacement of a F-type

converter” (page 136)

Table 4LNA-COMBINER location in the S8006 BTS

Equipment typeEquipment

number

Location Test


Combiner_LNACombiner_LNACombiner_LNACombiner_LNACombiner_LNACombiner_LNA

012345

LNA 0LNA 1LNA 2LNA 3LNA 4LNA 5

- 5.2.17 “Replacement of a RF-combiner

module (H2D)” (page 157)






Table 5Output RX-splitter D location in the S8006 BTS


number

LocationTestshe

et

Replacement sheet

D_Output_RX_SplitterD_Output_RX_SplitterD_Output_RX_SplitterD_Output_RX_SplitterD_Output_RX_Splitter

D_Output_RX_Splitter

0123

45

D_Output_RX_Splitter of DRX 0D_Output_RX_Splitter of DRX 1D_Output_RX_Splitter of DRX 2D_Output_RX_Splitter of DRX 3D_Output_RX_Splitter of DRX 4

D_Output_RX_Splitter of DRX 5

-

5.2.18“Replacement of a

Rx-splitter”(page 161)

Table 6Output RX-splitter M location in the S8006 BTS


numberLocation

Test sheet

Replacement sheet

M_Output_RX_SplitterM_Output_RX_SplitterM_Output_RX_Splitter

M_Output_RX_SplitterM_Output_RX_SplitterM_Output_RX_Splitter

012345

M_Output_RX_Splitter of DRX 0M_Output_RX_Splitter of DRX 1M_Output_RX_Splitter of DRX 2

M_Output_RX_Splitter of DRX 3M_Output_RX_Splitter of DRX 4M_Output_RX_Splitter of DRX 5

- 5.2.18“Replacement of a

Rx-splitter”(page 161)

Table 7

PA power amplifier location in the S8006 BTS

Equipmenttype

Equipmentnumber

LocationTestshe

etReplacement sheet

PAPAPAPAPAPA

0

12345

PA 0PA 1PA 2PA 3PA 4PA 5

- 5.2.14 “Replacement of a poweramplifier (PA)” (page 141)






Table 8Rectifier location in the S8006 outdoor BTS


number

Location Test sh

eet Replacement sheet

Rectifier 0 Rectifier 48

V -

5.2.16 “Replacement of a rectifier”(page 154)

Table 9VSWR-COMBINER location in the S8000 outdoor BTS (optional)


numberLocation

Testsheet

Replacement sheet

Combiner_VSWR

Combiner_VSWRCombiner_VSWRCombiner_VSWRCombiner_VSWRCombiner_VSWR

0

12345

VSWR 0

VSWR 1VSWR 2VSWR 3VSWR 4VSWR 5

- 5.2.17 “Replacement of a

RF-combiner module (H2D)”(page 157)

Table 10CMCF board location in the S8006 BTS

Equipment type

Equipment

number

Location

Test sheet Replacement sheet

CMCF 0 CMCF

04.4.2 “Test of the CMCF

board” (page 56)5.2.1 “Replacement of a CMCF

board” (page 77)

Table 11CPCMI board location in the S8006 BTS

Equipment type

Equipment

number

Location

Testsheet

Replacement sheet

CPCMI 0

CPCMI

0 - 5.2.2 “Replacement of a CPCMI board” (page 81)






Table 12Recal board location in the S8006 BTS

Equipment type

Equipment

number

Location

Testsheet

Replacement sheet

RECAL - RECAL - 5.2.3 “Replacement of the RECAL board” (page 85)





27.

Chapter 3 Description of a start-up

3.1 IntroductionThis chapter contains the procedure for starting up an S8006 BTS. A BTSstart-up is carried out in two steps. Perform them in the following order:

• Power on the cabinet (see 3.3 “S8006 BTS power-on/power-off” (page

33)). As a help, a brief description of the S8006 BTS power supply isprovided in 3.2 “S8006 BTS power supply” (page 27).

• Monitor the start-up phases (see 3.4 “Start-up phases” (page 35)).

ATTENTIONThe GPS synchronization feature must not be activated on the S8006 BTS.

3.2 S8006 BTS power supply3.2.1 Power supplies

3.2.1.1 F-type converterThe F-type converter supplies the +15 V and -15 V dc required by the

LNA-combiners and the VSWR-combiners.

3.2.2 Distribution of power supplies3.2.2.1 Mains power supplyFigure 7 "Mains power supply of the S8006 BTS" (page 31) shows theequipment supplied with the mains power supply.

3.2.2.2 -48 V power supplyFigure 8 "-48 V power supply of the S8006 BTS" (page 32) shows theequipment supplied with -48 V.

3.2.3 BatteriesThe batteries are used to keep the cabinet on after an AC failure.

3.2.3.1 Internal batteriesThe internal batteries are located at the bottom of the BTS cabinet.

The battery type is HAWKER CHLORIDE SBS 60 (string of four batteries12 V dc, in series).





28 Chapter 3 Description of a start-up

3.2.3.2 External batteriesThe external batteries are located in a dedicated cabinet.

This battery cabinet can house two types of batteries: SBS60 (50.8 Ah) orSBS-C11 (92 Ah) from HAWKER CHLORIDE (up to 4 strings in parallel,

each stack made of four 12 V dc-battery in series).

3.2.3.3 Discharge times of the batteriesThe Table 13 "Discharge times of the batteries" (page 28) presentsthe discharge times of the internal and external batteries for someconfigurations.

Table 13Discharge times of the batteries

External batteries

SBS 60 SBS C11Configu

ration

Internalbatt

eries(SBS

40)

1 string

2 strings

3 strings

4 strings

1 string

2 strings

3 strings

4 strings

O1 2 h 2 h 45 6 h 9 h 14 h 6 h 14 h 20 h 24 h

S111 1 h 1 h 15 3 h 5 h 7 h 2 h 45 7 h 11 h 16 h 30

S222 30 min 45 min 1 h 45 2 h 45 3 h 30 1 h 45 3 h 45 6 h 15 8 h 30

S233 20 min 30 min 1 h 15 2 h 2 h 30 1 h 15 2 h 45 4 h 30 6 h 45

The Table 16 "Charging times of the batteries" (page 29) presentsthe charging times of the internal and external batteries for someconfigurations.

However, these charging times depend on the following conditions:

• the temperature must be ambient (20 C-25 C or 68 F-77 F)

• the discharge depth must be respected (stopping voltage 42 V)

• the batteries must be practically new and correctly maintained inaccordance with the preventive maintenance procedure

• the initial capacity of batteries must be equal to 100%

• the remaining capacity of the batteries (before recharging) must bemore than 20%

• the outage duration (the time between discharge end and rechargebeginning) must be lower than one week

• there must not be any mains power supply cut when charging batteries

• the BTS must be in the optimal running conditions

The number of rectifiers in the cabinet must be:






Table 14Rectifier number in function of the configuration (1/2)

Configuration PA/ePA O1 S11 S111 S211 S221 S222 S322 S332

500W rectifiers of the

seven-rectifiers type

2 3 3 4 4 5 5 6

600W or 680W rectifiers ofthe six-rectifiers type

2 2 3 3 4 4 5 5

680W rectifiers of the GIPS 2 2 3 3 3 4 4 4

Table 15Rectifier number in function of the configuration (1/2)

Configuration mixed PA/ePA/ HePA

O1 S11 S111 S211 S221 S222

500W rectifiers of the

seven-rectifiers type 2 3 4

4 5 6

600W or 680W rectifiers ofthe six-rectifiers type

2 3 3 4

4 5

680W rectifiers of the GIPS 2 2 3 3 4 4

Table 16Charging times of the batteries

External batteries (SBS 60)Internal

batteries(SBS 40) 1 string 2 strings 3 strings 4 strings

Time needed for 80%

charging rate (*)1 to 3 h 1,5 to 4 h 2 to 5 h 2,5 to 7 h 3 to 10 h

Time needed for 100%charging rate (*)

Until 24 h Until 36 h Until 48 h Until 60 h Until 72 h

(*) These charging times depend on the conditions quoted in 3.2.3.3“Discharge times of the batteries” (page 28).

3.2.3.4 Storage of batteriesStorage duration is dependent of the last recharge date.

• For new batteries, the duration is calculated from the original chargedate. This date is indicated on a label under the format dd/mm/yy.

• For batteries which were already recharged by Nortel, the newduration is calculated from the last recharge cycle. The date of thislast recharge is manually noted on the label after each maintenanceoperation.






Table 17Storage duration depending of storage temperature

Data only used for HAWKER SBS Battery

Battery Temperature

during storage

20 C 25 C 30 C 35 C 40 C

Maximum StorageTime

20 months

15 months

10 months

7 months

5 months

To secure adequate storage/transportation and guarantee battery longterm performance, only one recharge cycle is allowed in the warehouse.

The discharge depth must be higher than 12.6V before the battery isrecharged otherwise battery may have defects, in which case maintenanceprocedure is applicable.






Figure 7Mains power supply of the S8006 BTS






Figure 8-48 V power supply of the S8006 BTS





3.3 S8006 BTS power-on/power-off 33

3.3 S8006 BTS power-on/power-off3.3.1 Power-on procedure

The procedure below describes the power-on for the S8006 BTS when itis completely powered off.

The order in which the power supplies of the cabinet are put into service isdefined in the procedure. This order must be respected.

Step Action

1 Switch on the cabinet power supply from the operator box.

ATTENTIONCheck that the following elements are OFF: the circuit breakers ofthe AC box, the switches located on the rectifiers, the circuit breakersfor PAs Fans DRXs (or e-DRXs) and CBCF, the switch of the F-typeconverter, the circuit breakers of the customer AC power supply box.

2 Put the main breaker in the "I" position.

3 Put the climatic system circuit breaker in the "I" position.

4 Listen to the fans starting up.

5 Check that each fan is operating: place a sheet of paper nearthe outlet (blowing way: interior to exterior).

6 Check that the three LEDs of the LNS-DACS are on (you cansee these LEDs through the window located on the front panelof the LNS-DACS).

7 Put the rectifier circuit breaker in the "I" position.

8 For each rectifier:

a Put the switch of the rectifier in the "I" position.

b Check that the green LED of the rectifier turns on (a shorttime after).

9 On the PCU front panel:

a Check that the five green LEDs (PA, FAN, DRX (or e-DRX),BCF, ON) are on.

b Check that the red LED (AL, temperature) is off.

10 Put the FAN circuit breaker of the PCU in the "I" position.

11 Check that the low noise is increasing.

12 Put the PA circuit breaker of the PCU the "I" position.

13 Check that the alarm LED located on each PA is red.

14 Put the switch of the F-type converter in the "I" position.






15 Check that the -15 V and +15 V green LEDs of the F-typeconverter are on.

16 Put the DRX (or e-DRX) circuit breaker of the PCU in the "I"position.

17 Check that each DRX (or e-DRX) is powered: the +5V LEDwhich is located on the front panel of each DRX (or e-DRX) isilluminated.

DANGERElectric shockThe BCF circuit breaker powers the CBCF, theRECAL, and the user compartment (if any). If a 48V dc module is connected to the user compartment,it is powered on, so take care while handling theequipment.

18 Put the BCF circuit breaker of the PCU in the "I" position.

19 Wait for one minute before checking the state of the LEDs onthe boards.

--End--

Check that the BTS starts correctly by monitoring the state of its LEDs(see 3.4 “Start-up phases” (page 35)).

3.3.2 Power-off procedure

Step Action

1 Put the switch of the F-type converter in the "O" position.

2 Put the four circuit breakers of the PCU in the "O" position in thefollowing order:

a the PA circuit breaker

b the FAN circuit breaker

c the DRX (or e-DRX) circuit breaker

d the BCF circuit breaker

3 Put the switch of each rectifier in the "O" position.

4 Put the rectifier circuit breaker on the "O" position.

5 Put the climatic system circuit breaker in the "O" position.

6 Put the main breaker in the "O" position.

7 Switch off the cabinet power supply from the operator box.

--End--






Check that the BTS starts correctly by monitoring the state of its LEDs(see 3.4 “Start-up phases” (page 35)).

3.4 Start-up phasesThe S8006 BTS start-up falls into a number of phases, that aresummarized in the following flowcharts (see Figure 9 "Start-up phasesof an S8006 BTS" (page 36)). The LEDs on the front panels of the BTSboards allow you to follow this start-up (see Figure 10 "States of the LEDsduring start-up phases of a S8006 BTS" (page 39)).

When the state of a btsSiteManager object goes to "unlocked", the BTScan send spontaneous messages to the controlling BSC (spontaneousmessages indicating the absence of certain items of equipment).

When a site starts up, the BTS does not know the hardware configuration,necessary for the site definition and chosen by the operator. The choice is

that the BTS does not make alarms active about elements:

• that make up the maximum configuration of a site

• that are absent from the configuration when the site starts up

This choice requires at the OMC-R:

• that the operator displays the hardware configuration of the site afterits start-up

• that the operator checks the conformity between the hardwareconfiguration and the chosen configuration

To do this, perform a "Display" or "Display all" command on thebtsSiteManager object and check that the range value of the"btsDescription" parameter is correct.






Figure 9Start-up phases of an S8006 BTS






Figure 10States of the LEDs during start-up phases of a S8006 BTS





41.

Chapter 4 Preventive maintenanceprocedures

4.1 Introduction4.1.1 Presentation

This chapter contains the preventive maintenance procedures applicable to

the S8006 BTS.

There are two types of procedure:

• test procedures, given in this chapter (the structure of a test procedureis described in 4.1.5 “Description of a preventive maintenanceprocedure sheet” (page 45))

• replacement procedures, given in Chapter 5 “Replacement procedures”(page 73)

These procedures must be performed following the schedule given below(twice a year, once a year, or every two years, etc..). Table 24 "Summaryof the preventive maintenance schedule of the S8006 BTS" (page44) presents a summary of the preventive maintenance schedule.

It is possible to group some procedures, which reduces the interventiontime. The provided intervention time corresponds to the intervention timefor only one item of equipment.





42 Chapter 4 Preventive maintenance procedures

4.1.2 Test scheduleThe following tables list the items of equipment according to their testschedule.

Table 18

Tests performed once a year

Equipment On-site interv

ention time

Impact of the teston service

Test sheet

AC lightningprotector

45 minutes loss of service 4.4.1 “Test of the AC lightningprotector” (page 48)

LNS-DACS two hours loss of service Chapter 6 “LNS-DACS technicalmanual” (page 173)

Door gasket 30 minutes none 4.4.3 “Test of the door gasket”(page 61)

Lightning

protectors ofthe 48-V box(optional)

20 minutes loss of the 48-V

service

4.4.4 “Test of the lightning protectors

of the 48 V box” (page 66)

Lock 5 minutes none Figure 22 "View of the 48-V lightningprotectors box of the S8006 BTS"

(page 70)

Table 19Test performed every two years

EquipmentOn-site

interventiontime

Impact of the teston service

Test sheet

CMCF board of theCBCF

5 minutes loss of service 4.4.2 “Test of the CMCF board”(page 56)





4.1 Introduction 43

4.1.3 Replacement scheduleThe following tables list the items of equipment according to theirreplacement schedule.

Table 20

Replacement performed once a year

EquipmentOn-site

interventiontime

Impact of thereplacement on

serviceReplacement sheet

BTS filter* 15 minutes none 5.2.7 “Replacement of the BTS filter”(page 108)

* means that the replacement of the BTS filter must be performed at leastonce a year and varies according to the environment of the BTS.

Table 21Replacements performed every five years

Equipment

On-siteintervention

time

Impact of the

replacementon service

Replacement sheet

LNS-DACS gasket

2 hours foreach gasket

loss of service 5.2.9 “Replacement of the LNS-DACSgasket” (page 115)

Door gasket

2 hours none 5.2.10 “Repair or replacement of the doorgaskets” (page 118)

Table 22

Replacement performed every six years

Equipment

On-siteinterventiontime

Impact of thereplacementon service

Replacement sheet

LNS-DACS

1h30 loss of service 5.2.5 “LNS-DACS replacement” (page 98)

Table 23Replacements performed every ten years

EquipmentOn-site

interventiontime

Impact of thereplacement on

serviceReplacement sheet

AC lightningprotector 15 minutes loss of service 5.2.19 “Replacement of the AClightning protector” (page 165)

Lightning protectorof the 48-V box(optional)

30 minutes loss of the 48-Vservice

5.2.13 “Replacement of thelightning protectors of the 48

V” (page 139)

Thermostats 4 hours loss of service 5.2.20 “Replacement of thethermostats” (page 169)






4.1.4 Summary of the preventive maintenance scheduleThe following tables summarize the preventive maintenance schedule ofthe S8006 BTS.

Table 24

Summary of the preventive maintenance schedule of the S8006 BTS

EquipmentRequired test

schedule

Mandatoryreplacement

schedule

Test sheet Replacement

sheet

AC lightningprotector

once ayear

every10 years

4.4.1 “Test of the AClightning protector”

(page 48)

5.2.19 “Replacement ofthe AC lightning protector”

(page 165)

CMCF board ofthe CBCF

every 2years

- 4.4.2 “Test of theCMCF board” (page

56)

5.2.1 “Replacement of aCMCF board” (page 77)

LNS-DACS once ayear

every6 years

Chapter 6 “LNS-DACS

technical manual”(page 173)

5.2.5 “LNS-DACS

replacement” (page 98)

BTS Filter - oncea year

- 5.2.7 “Replacement of theBTS filter” (page 108)

LNS-DACSgasket

- every5 years

- 5.2.9 “Replacement ofthe LNS-DACS gasket”

(page 115)

Door gasket once ayear

every4 years

4.4.3 “Test of the doorgasket” (page 61)

5.2.10 “Repair orreplacement of the door

gaskets” (page 118)

Lightningprotector ofthe 48-V box(optional)

once ayear

every10 years

4.4.4 “Test of thelightning protectors

of the 48 V box”(page 66)

5.2.13 “Replacement of thelightning protectors of the

48 V” (page 139)

Locks once ayear

- Figure 22 "View ofthe 48-V lightning

protectors box of theS8006 BTS" (page 70)

-

Thermostats - every10 years

- 5.2.20 “Replacement of thethermostats” (page 169)





4.1 Introduction 45

4.1.5 Description of a preventive maintenance procedure sheetA preventive maintenance procedure sheet is divided into the followingparagraphs:

• the title

• the main body composed of steps explaining how to test an item ofequipment

• the figure(s) if necessary

4.1.5.1 Main body of the procedure sheetThe main body contains the following information:

• the product reference

• the range of application, which explains which item of equipment isconcerned by the test procedure

• the schedule, which reminds how often the test procedure must beexecuted

• the intervention time

• the required tools

• the impact of the test procedure:

— on the operation of the cabinet

— at the OMC-R

— on the service

• the location of the equipment to be tested

• the action, which contains the step-by-step actions of the testprocedure. These actions are summarized in a flowchart presented atthe beginning of the sheet.

4.1.5.2 FiguresThe figures are provided to help the operator perform the actions. Theyshow the item of equipment schematically.






4.2 On-site checks4.2.1 Preliminary checks before performing preventive maintenanceprocedures

DANGERPersonal safety rulesPersonnel working on the cabinet must be authorized to workaccording to the safety standards.

CAUTIONESDS handling precautionsWear the antistatic bracelet when performing maintenanceprocedures, especially when handling board.

WARNINGRain, Snow or High Humidity Weather ConditionsMake sure that there is no water trapped on the top of the

door gasket prior to opening doors. If water is present, wipe orsponge off the water to avoid it from entering the BTS.

4.2.2 Final checks after having performed preventive maintenanceprocedures

After having performed the preventive maintenance procedures, leave thepremises clean and tidy.





4.3 Check at the OMC-R 47

4.3 Check at the OMC-R4.3.1 Preliminary checks before performing preventive maintenanceprocedures

Preventive maintenance procedures on equipment can be performed onlywhen no alarm is present.

Before taking any action, check the equipment status in the "OMC-RBrowser" window at the OMC-R, which provides a means of graphicallymonitoring the network.

If the graphical elements are gray, no alarm is active, so the preventivemaintenance can be performed.

4.3.2 Final checks after having performed preventive maintenanceprocedures

After performing a preventive maintenance procedure, check that thenetwork has resumed its correct operation.

The graphical objects must appear without any alarm in the "OMC-RBrowser" browser windows at the OMC-R. The preventive maintenanceprocedures are complete.

If there are alarms on the graphical objects concerned, check the conditionof the site using the "Display all" command on the btsSiteManager object:

• If the operationalState is "enabled", clear the alarms to complete thepreventive maintenance procedures.

• If the operationalState is "disabled", set the btsSiteManager object to

"locked" and then back to "unlocked", and then perform the "Displayhardware information" command of the btsSiteManager object:

— If all equipment is operating, clear the active alarms. Thepreventive maintenance procedures are complete.

— If certain items of equipment have failed, refer to the replacementprocedures.






4.4 Preventive maintenance procedure sheetsThese sheets are given in the following pages.

4.4.1 Test of the AC lightning protectorProduct reference

CPC codes

• single-phase AC lightning protector: A0797207

• neutral plug-in module for the AC lightning protectors: A0773608

• phase plug-in module for the AC lightning protectors: A0773606

Range of application

This procedure applies to the AC lightning protector of the S8006 BTS forGSM 1800.

Schedule

Perform this test once a year.

Intervention time

The intervention time is approximately 45 minutes according to theconfiguration.

Tools required

• Screwdriver• Box-spanner

• Adhesive isolate tape

• Joslyn tester: Surge Protector Test Set Model 4010-01

Impact of the test on service

DANGERElectric shockThe test is prohibited during thunderstorm conditions.

The BTS does not remain supplied.

CAUTIONService interruptionThe service is lost.

Location






The AC lightning protector is located in the AC box (see Figure 11"Location of the AC lightning protector of the S8006 BTS" (page 49)).

Figure 11Location of the AC lightning protector of the S8006 BTS






Figure 12Flowchart of the test procedure of the AC lightning protector of the S8006 BTS






Procedure

Refer to Figure 12 "Flowchart of the test procedure of the AC lightningprotector of the S8006 BTS" (page 50) for a flowchart of the procedure.

Step Action

1 Power off the BTS

Refer to 3.3.2 “Power-off procedure” (page 34).

2 Open the AC box

a Disconnect the alarm cable C01 from the AC box and therectifier cable.

b Undo the four quarter-turn screws no.4 on the AC box side

and remove the small cover (see Figure 13 "AC box of theS8006 BTS" (page 53)).

c Disconnect the input AC cable by removing the nuts from thefilters and the nut on the ground connection (see Figure 15"View of the AC lightning protector of the S8006 BTS" (page55)).

d Remove the input AC cable gland by unscrewing the largenut (see Figure 15 "View of the AC lightning protector of theS8006 BTS" (page 55)).

3 Perform the visual test of the AC lightning protector

a Check on signs of burns or damage to the case, cover andterminal blocks.

b Check on signs of burns to the cables.

c Check the state of the indicator of each plug-in module:

• If it is white, the lightning protector is correct. Go to step8.

• If it is white and red, the lightning protector is not correctand the corresponding plug-in module must be changed.Go to step 8.

• If it is red, the lightning protector is not correct and the

corresponding plug-in module must be changed. Go tostep 8.

4 Perform the electrical test of the AC lightning protector.

Observe the operating instructions for the Joslyn tester.

a Mark and disconnect the two wires (Phase and Neutral) ofthe AC lightning protector from the terminal block.






b Isolate the two lugs with the adhesive tape.

c Connect the red wire of the tester to the first varistor nut(black wire).

d Connect the black wire of the tester to the other varistor nut

(white wire).e Push the test button of the tester. The test value is

maintained on the display until the test button is released.

f Note the first value.

g Disconnect the red wire of the tester and connect it to theother varistor nut (the other black wire).

h Push the test button of the tester. The test value ismaintained on the display until the test button is released.

i Note the second value.

• If both values are above 210 V, go to step 5.

• If at least one of both values is below 210 V, go to step 7.

5 Close the AC box

a Install the input AC cable gland and tighten the large nut (seeFigure 15 "View of the AC lightning protector of the S8006BTS" (page 55)).

b Screw the nuts on the filters an the nut on the groundconnection.

c Connect the two AC lightning protector wires on the terminalblock (see Figure 15 "View of the AC lightning protector ofthe S8006 BTS" (page 55)).

d Insert the small cover.

e Tighten the four quarter-turn screws no.4 on the AC box side.

f Connect the rectifier cable.

g Connect the alarm cable to the AC box.

6 Power on the BTS

a Refer to 3.3.1 “Power-on procedure” (page 33).

b Go to step 9.

7 Replace the AC lightning protector

Replace the AC lightning protector according to the replacementprocedure (see 5.2.19 “Replacement of the AC lightningprotector” (page 165)).

8 Replace the faulty plug-in module of the AC lightning protector






Replace the plug-in module according to the replacementprocedure (see 5.2.19 “Replacement of the AC lightningprotector” (page 165)).

9 The procedure is complete.

--End--







Figure 14Side covers of the AC box of the S8006 BTS






Figure 15View of the AC lightning protector of the S8006 BTS






4.4.2 Test of the CMCF boardProduct reference

Equipment PEC codes CPC codes

CMCF board phase 1 NTQA66CA A0680711

CMCF board phase 2 NTQA66CB A0779822


This procedure applies to the only part to be verified in the CBCF, theoscillator of the CMCF board of the S8006 BTS.

Schedule

Perform this test every two years.

Intervention time

The intervention time is approximately 5 minutes.

Tools required

DC Voltmeter


None.

DANGERElectric shockThe BTS remains supplied, so take care while handling theequipment.

The operationalState of the btsSiteManager object is "enabled".

Location

The CMCF board is located in the CBCF subsystem (see Figure 17 "CBCF

module" (page 59)).






Figure 16Flowchart of the test procedure of the CBCF module CMCF board






Procedure

Refer to Figure 16 "Flowchart of the test procedure of the CBCF moduleCMCF board" (page 57) for a flowchart of the procedure.

Step Action

1 Open the doors.

2 Perform the electrical test

This test has to be made on the CMCF board which is runningsince at least 30 minutes.

Check the dc voltage between the pin 3 and the pin 5 of theTEST connector of the CMCF board: plug the positive terminalof the dc voltmeter to the pin 5 and plug the negative terminal of

the dc voltmeter to the pin 3 (see Figure 18 "CMCF board" (page60)).

• If the voltage is above 9 V or below 1 V, go to step 4.

• Otherwise, go to step 3.

3 Replace the CMCF board

Replace the CMCF board according to the replacementprocedure (see 5.2.1 “Replacement of a CMCF board” (page77)).

The CMCF board must be returned to the warehouse for the

oscillator change.4 Close the doors

a Close the doors.

b Go to step 5.


--End--






Figure 17CBCF module






Figure 18CMCF board






4.4.3 Test of the door gasketProduct reference

CPC codes:

• Left door gasket NTSB01HA / A0824989

• Right door gasket NTSB01GA / A0824987

• Door gasket for the LNS-DACS NTSB01JA / A0824991

• EMI gaskets for the bulkhead R0117841


This procedure applies to the door gaskets of the S8006 BTS.

Schedule


Intervention time

The intervention time is approximately 30 minutes for each gasket.

Tools required

None


None

DANGERElectric shockThe BTS remains supplied, so take care while handling the

equipment.


Location

The door gaskets are located on the doors (see Figure 19 "Location of thedoor gaskets of the S8006 BTS" (page 62)).






Figure 19Location of the door gaskets of the S8006 BTS






Figure 20Flowchart of the test procedure of the door gaskets of the S8006 BTS






Procedure

Refer to Figure 20 "Flowchart of the test procedure of the door gaskets ofthe S8006 BTS" (page 63) for flowchart of the procedure.

Step Action

1 Open the doors.

2 Perform the first visual test

Check the condition of the gaskets all along their length: pincheach gasket along its length to check its adherence to the metalframe (which is facing the doors of the BTS).

• If the gasket is well stuck, go to step 5.

• If there is less than 20 cm of the gasket that does not adhereto the metal frame, go to step 3.

• If there is more than 20 cm of the gasket that does notadhere to the metal frame, go to step 4.

3 Repair the gasket length

a Repair the gasket according to the repair procedure (see5.2.10.1 “Repair of the door gaskets” (page 118)).

b Go to step 5.

4 Replace the gasket

a Replace the gasket according to the replacement procedure(see 5.2.10.2 “Replacement of the door gaskets” (page 128)

b Go to step 7.

5 Perform the second visual test

Check the condition of the gasket corners.

• If the gasket corners are correct, go to step 7.

• If a hole is visible through one gasket corner (because of alack of silicone, or because the gaskets are not aligned ornot properly cut, which prevents a contact between the twogaskets), go to step 6.

• If a hole appears when the operator lightly presses his fingeron each side of the pre-cut gasket, go to step 6.

6 Repair the gasket corner

a Repair the gasket according to the repair procedure (see5.2.10.1 “Repair of the door gaskets” (page 118)).

b Go to step 7.






7 Close the doors. Go to step 8.


--End--






4.4.4 Test of the lightning protectors of the 48 V boxProduct reference

CPC code: A0681776


This procedure applies to the lightning protectors of the 48-V (optional)

Schedule


Intervention time


Tools required

• Flat screwdriver

• Box spanner

• Joslyn tester: Surge protector Test Set Model 4010-01


DANGERElectric shock

The BTS remains supplied with the mains power supply, sotake care while handling the equipment. The 48 V box does not

remained supplied.


Location

The lightning protectors of the 48-V are located under the BTS.






Figure 21Flowchart of the test procedure of the 48-V lightning protector of the S8006 BTS






Procedure

Refer to Figure 21 "Flowchart of the test procedure of the 48-V lightningprotector of the S8006 BTS" (page 67) for a flow chart of the procedure.

Step Action

1 Preliminary operations

These devices are located under the cabinet.

a Access to the 48-V box

b Remove the fuse that protects the 48-V (this fuse is locatedon the fuse panel, see Figure 5 "Maximum equipment of anS8006 BTS cabinet" (page 21)).

c Open the 48-V box.2 Perform the visual test of the 48-V lightning protectors

Check on signs of burns or damage to the case, cover andterminal blocks.

• If there is no damage, go to step 3.

• If there is damage, go to step 4.

3 Perform the electrical test of the 48-V lightning protectors

a Disconnect all the wires connected on the lightningprotectors.

b Connect the red wire of the tester to an input.

c Connect the black wire of the tester to the other input.

d Push the test button (the test value is maintained on thedisplay until the test button is released).

e Note the value and compare it to the supplier value.

• If the value is equal to 68 V +/- 10%, go to step 5.

• If the value is not equal to 68 V +/- 10%, go to step 4.

4 Replace a lightning protector

a Replace the lightning protectors according to the replacementprocedure (see 5.2.13 “Replacement of the lightningprotectors of the 48 V” (page 139).

b Go to step 5.

5 Leave the 48-V lightning protectors

a Close the 48-V box.






b Reinsert the fuse that protects the 48-V (this fuse is locatedon the fuse panel, see Figure 5 "Maximum equipment of anS8006 BTS cabinet" (page 21)).

c Put the 48-V box back in its place.

d Go to step 6.6 The procedure is complete.

--End--






Figure 22View of the 48-V lightning protectors box of the S8006 BTS






4.4.5 Lock lubricatingRange of application

This procedure applies to the locks of the S8006 BTS.

Schedule

Perform this procedure once a year.

Intervention time


Tools required

WD-40 oil

Impact of the lubricating on the service

None.

DANGERElectric shockThe BTS remains supplied, so take care while handling theequipment.


Lubricating

• Insert the exhaust pipe, delivered with the WD-40 oil, inside the lockbarrel.

• Spray the WD-40 oil.

• Remove the exhaust pipe from the lock barrel.

• Insert the key inside the lock barrel and turn it five times to allow agood diffusion of the oil.





73.

Chapter 5 Replacement procedures

5.1 Introduction5.1.1 Presentation

This chapter contains the replacement procedures applicable to theS8006 BTS. The operator must refer to the figures to locate the itemsof equipment (boards and modules) concerned by the replacement

procedures.

New equipment at OMC-R identify the type of equipment to replace incase of failure: DRX; PA or ePA or HePA; CMCF phase 1 or CMCF phase2.

If present in the network, an e-DRX must be replaced by an e-DRX. ADRX-ND3 must be replaced only by a DRX-ND3. Similarly, an (H)ePAmust be replaced by a (H)ePA, a CMCF phase 1 (resp. type 2) must bereplaced by a CMCF phase 1 (resp. type 2) on duplex S8002 BTS.

Two types of customers may be distinguished:• Customer using HePA/(e)PA mixed cell in concentric cell: a HePA

must be replaced by a HePA and an (e)PA must be replaced by an(e)PA.

• Other customers: an e-DRX or a DRX-ND3 can replace a failing DRX,an ePA (or a HePA) can replace a PA if the number of the (H)(e)PA inthe BTS respects the HePA supported configurations. A CMCF phase1 can replace a CMCF phase 2 (and vice versa).

5.1.2 Description of a replacement procedure sheet

A replacement procedure sheet is divided into the following paragraphs:

• the title

• four types of operation to be executed to replace an piece ofequipment

• the figure(s)





74 Chapter 5 Replacement procedures

5.1.2.1 Main body of the sheetThe main body contains the following information:

• the product reference(s)

• the intervention time

• the tools required

• the location of the piece of equipment to be replaced

• the procedure which contains the following steps:

— the safety instructions

— the preliminary operations, which precede the removal of the pieceof equipment

— the removal operations

— the reinsertion operations

— the additional operations, which include the return to service of thereplaced piece of equipment, and additional on-site checks on thestate of the replaced piece of equipment

5.1.2.2 FiguresThe figures are provided as a help for the maintenance operations.

5.1.3 Preliminary operationsMost of the operations on the S8006 BTS cabinet do not requireequipment shutdown.

DANGERRisk of personal injuryThe personnel working on the cabinet must be authorized to

work according to the applicable safety standards. Failure tofollow safety standards can result in serious personal injury ordeath.

CAUTIONRisk of equipment damageWear the antistatic bracelet when performing maintenanceprocedures, especially when handling boards.

5.1.4 Tools

• Extraction tool P0850747 (inside the cabinet door)

• Flat and Phillips screwdrivers

• Electrician knife





5.1 Introduction 75

• Wrenches

• Wrenches for hexagonal head

• Ty-wraps

• Crimping tool• Wire stripper

• Toolbox

• Adhesive tape






5.2 Replacement sheetsThe replacement sheets are given in the following pages.

The table below gives the numbers of the replacement sheets concerningeach piece of equipment.

Equipment Replacement sheet

CMCF boards 5.2.1 “Replacement of a CMCF board” (page 77)

CPCMI boards 5.2.2 “Replacement of a CPCMI board” (page 81)

RECAL board 5.2.3 “Replacement of the RECAL board” (page 85)

AC box circuit breakers 5.2.4 “Replacement of an AC box circuit breaker”(page 88)

LNS-DACS climatic system 5.2.5 “LNS-DACS replacement” (page 98)

LNS-DACS control assembly 5.2.6 “Replacement of the LNS-DACS controlassembly” (page 103)

BTS filters 5.2.7 “Replacement of the BTS filter” (page 108)

LNS-DACS twin blowers 5.2.8 “Replacement of a LNS-DACS twin blower” (page 110)

LNS-DACS gasket 5.2.9 “Replacement of the LNS-DACS gasket” (page 115)

Door gaskets 5.2.10 “Repair or replacement of the door gaskets” (page 118)

DRX (or e-DRX) modules 5.2.11 “Replacement of a DRX (or e-DRX)module” (page 131)

F-type converter 5.2.12 “Replacement of a F-type converter” (page 136)

Lightning protectors of the 48-V box 5.2.13 “Replacement of the lightning protectorsof the 48 V” (page 139)

PA modules 5.2.14 “Replacement of a power amplifier (PA)”(page 141)

Power supply rack 5.2.15 “Replacement of the power supply rack”(page 145)

Rectifiers 5.2.16 “Replacement of a rectifier” (page 154)

RF-combiner modules 5.2.17 “Replacement of a RF-combiner module(H2D)” (page 157)

Rx-splitters 5.2.18 “Replacement of a Rx-splitter” (page 161)

AC lightning protector 5.2.19 “Replacement of the AC lightning protector” (page 165)

Thermostats 5.2.20 “Replacement of the thermostats” (page 169)





5.2 Replacement sheets 77

5.2.1 Replacement of a CMCF boardProduct reference


CMCF board Type 1 NTQA66CA A0680711

CMCF board Type 2 NTQA66CB A0779822

Intervention time


Tools required


• Phillips screwdriver

Impact of the replacement on service

CAUTIONReplacement of a CMCF Type 1 by a CMCF Type 2Perform a lock/unlock command on the transceiverEquipmentobject to ensure the coherence of the notifications sent to theOMC-R.


Location

The CMCF boards are located in the CBCF (see Figure 5 "Maximumequipment of an S8006 BTS cabinet" (page 21)).






Procedure

Step Action

1 Safety instructionsCAUTIONRisk of equipment damageWear the antistatic bracelet when performing themaintenance procedure described below, especiallywhen handling boards.


Locate the defective board.

3 Removal of a CMCF board

a Undo the two fixing screws on the front panel of the board(see Figure 23 "CMCF board" (page 80)).

b Extract the board with the extraction tool and remove it.

4 Reinsertion of a CMCF board

a Ensure the hardware version number of the element iscorrect and coincides with the system release.

b Position the board into the slot guides.

c Tighten the two fixing screws.

5 Additional operations

Check the state of the LEDs. At start-up, they should turn on,then take the following states:

• "BIST" LED off (on during self-test)

• "+5 V" LED on

• "RDY" LED on

• "OL" LED on

• "ABIS" LED off

• "RUN" LED off

• one of these LEDs on (clock number)

— "CLK0"

— "CLK1"

— "CLK2"

• "OVEN" LED on

• "LOCKED" LED off

• "HLDVR" LED off






• "LNK" LED on

• "COL" LED off

• "RX" LED off

• "TX" LED off


--End--






Figure 23CMCF board






5.2.2 Replacement of a CPCMI boardProduct reference


CPCMI board for GSM 1800 NTQA66BA A0680710

Intervention time


Tools required





Location

The CPCMI boards are located in the CBCF (see Figure 5 "Maximumequipment of an S8006 BTS cabinet" (page 21)).






Procedure

Step Action

1 Safety instructionsCAUTIONESDS handling precautionsWear the antistatic bracelet when performing themaintenance procedure described below.

2 Preliminary operation

Locate the defective board.

3 Removal of the CPCMI board

a Undo the two fixing screws on the front panel of the board

(see Figure 24 "CPCMI board" (page 84)).

b Extract the board with the extraction tool and remove it.

4 Reinsertion of a new CPCMI board

a Ensure the hardware version number of the elementaccording to the current release of the system.

b Check the correctness of the settings of the board (position of jumpers and switches):

• S3 (0,1, 2, 3, 4, 5, 6, 7) = 120 Ohms or 75 Ohms,

• PCM0 or PCM1:

MT0 = "ON" and MT1 = "OFF" ==> No CRCMT0 = "OFF" and MT1 = "ON" ==> CRC4LS0 = "OFF", LS1 = "OFF", LS2 = ‘ON" (according to T1length)FSDL = "OFF", B8ZS = "OFF", RES = ‘OFF" (defaultconfiguration)

c Position the board into the slot guides.

d Tighten the two fixing screws.


Check the state of the LEDs. At start-up, they should turn on,then take the following states:


• "+5 V" LED on

• "RDY" LED on

• "SKP" LED off

• "LFA" LED off






• "NOS" LED off (if the pcm link between the BSC and the BTSis correct)

• "RRA" LED off


--End--






Figure 24CPCMI board






5.2.3 Replacement of the RECAL boardProduct reference

PEC code: NTQA66DA

CPC code: A0680712

Intervention time


Tools required





CAUTIONSupervision lossThe service is not supervised any more.

Location

The RECAL board is located on Figure 5 "Maximum equipment of anS8006 BTS cabinet" (page 21).






Procedure

Step Action

1 Safety instructionsCAUTIONRisk of equipment damageWear the antistatic bracelet when performing themaintenance procedure described below, especiallywhen handling boards.

2 Removal of the RECAL board

a Disconnect the following connectors on the front panel PWR,EXT NP, INT, PCM, PCM OUT, EXT P (see Figure 25 "Recalboard" (page 87)) and separate them from the board in order

to make the access to the board easier.b Undo the four fixing screws on the front panel of the board.

c Extract the board with the extraction tool and remove it.

3 Reinsertion of the new RECAL board

a Position the board into the slot guides.

b Tighten the four fixing screws.

c Reconnect the connectors on the front panel (EXT NP, INT,PCM, PCM OUT, EXT P, PWR).


Check the state of the LEDs on the board. When powering on,they should turn on, then take the following states:


• "+5 V" LED on

• "RDY" LED on


--End--






Figure 25Recal board






5.2.4 Replacement of an AC box circuit breakerRange of application

This procedure applies to the following breakers:

• main circuit breaker

• rectifier breaker

• climatic system breaker

Product reference

CPC codes:

• main circuit breaker: A0773540

• climatic system breaker: A0810978

• rectifier breaker: A0785933

Intervention time

The intervention time is approximately one hour.

Tools required

• Screwdriver

• Wrench


CAUTIONService interruptionThe cabinet does not remain supplied. The service is lost.

Location

The AC circuit breakers are located in the AC box (see Figure 5 "Maximumequipment of an S8006 BTS cabinet" (page 21)).






Procedure

Step Action

1 Safety instructionsCAUTIONRisk of equipment damageWear the antistatic bracelet when performing themaintenance procedure described below.


Power off BTS: refer to 3.3.2 “Power-off procedure” (page 34)

3 Removal of an AC box

a Disconnect the alarm cable C01 from the AC box and therectifier cable (see Figure 26 "AC box of the S8006 BTS"(page 92)).

b Undo the four quarter-turn screws no.4 on the AC box sideand remove the small cover.

c Disconnect the input AC cable by removing the nuts from thefilters and the nut on the ground connection (see Figure 27"Side view of the AC box of the S8006 BTS" (page 93)).

d Remove the gland from the input AC cable gland byunscrewing the large nut.

e Undo the two securing screws no.1 and no.2 on the AC box

top and on the front panel of the AC box (see Figure 26 "ACbox of the S8006 BTS" (page 92)).

f Disconnect the ground cable by removing the nut.

g Undo the lug located on top of the small part of the AC box.

h Remove the AC box.

i Undo all the screws on the left side cover of the AC box (seeFigure 28 "Side covers of the AC box of the S8006 BTS"(page 94)).

4 Removal of a circuit breaker

a If a main circuit breaker must be replaced, perform thefollowing actions.

• Locate and disconnect the circuit breaker cables (seeFigure 29 "Main circuit breaker of the AC box of the






S8006 BTS" (page 95)) by removing the four nuts at theback of the circuit breaker.

• Remove the two screws on the front of the circuit breaker.

• Remove the circuit breaker.

b If a climatic system circuit breaker must be replaced,perform the following actions.

• Locate and disconnect the cables of the climatic systembreaker (see Figure 30 "Climatic system breaker of the ACbox of the S8006 BTS" (page 96)) by removing the fourscrews no.1 located at the back of the circuit breaker.

• Remove the two screws no.2 located on the front of thecircuit breaker.


c If a rectifier circuit breaker must be replaced, perform thefollowing actions.

• Locate and disconnect the cables of the rectifier circuitbreaker (see Figure 31 "Rectifier circuit breaker of the ACbox of the S8006 BTS" (page 97)) by removing the four orfive screws no.1 located at the back of the circuit breaker.

• Remove the two screws no.2 located on the front of thecircuit breaker.


5 Reinsertion of a circuit breaker

a Connect all the previously marked wires on the new breakerby tightening the four screws no.1 or nuts at the back of thebreaker.

b Install the breaker.

c Tighten the two securing screws on the breaker front panel.

6 Reinsertion of an AC box

a Tighten the screws that fasten the side plate of the AC box(see Figure 28 "Side covers of the AC box of the S8006 BTS"(page 94)).

b Put the AC box in its place.

c Tighten the two screws no.1 and no.2 (see Figure 26 "AC boxof the S8006 BTS" (page 92)).

d Screw the lug located on top of the small part of the AC box.

e Connect the rectifier cable and the alarm cable.

f Connect the ground cable by tightening the nut.






g Put back the gland of the AC input cable on by tightening thelarge nut.

h Connect the AC input cable to the terminal block bytightening the screws no.3 and the nut on the groundconnection.

i Connect the ground cable to the ground terminal.

j Put the small cover back on and tighten the four no.4quarter-turn screws.

7 Additional operation

Power on the BTS: Refer to 3.3.1 “Power-on procedure” (page33)


--End--






Figure 27Side view of the AC box of the S8006 BTS






Figure 28Side covers of the AC box of the S8006 BTS






Figure 29Main circuit breaker of the AC box of the S8006 BTS






Figure 30Climatic system breaker of the AC box of the S8006 BTS






Figure 31Rectifier circuit breaker of the AC box of the S8006 BTS






5.2.5 LNS-DACS replacementProduct reference

PEC codes CPC codes

NTSB30AA A0804849

Intervention time


Tools required


• Wrench for M6 hexagonal head



DANGERHeavy liftingA DACS is very heavy (» 25kg).

DANGERRisk of personal injuryThe BTS does not remain supplied with the mains power supply.

DANGERRisk of electric shockThe personnel working on the cabinet must be authorized towork according to the security standards.

The operationalState of the btsSiteManager object is "disabled".

Location

The DACS climatic system is located on Figure 24 "CPCMI board" (page84)






Procedure

Step Action

1 Safety instructions

CAUTIONRisk of equipment damageWear the antistatic bracelet when performing themaintenance procedure described below.


a Open the doors of the cabinet.

b Power off the BTS: Refer to 3.3.2 “Power-off procedure”(page 34).

3 Removal of the LNS-DACS climatic system

a Remove the upright located in front of the LNS-DACS (1screw at the top of the upright (left hand), 1 screw at thebottom of the upright (right hand))

b Unscrew and remove the 4 screws that fasten theLNS-DACS.

c Two air pipes are located at the right hand of the LNS-DACS(see Figure 32 "S8006 - BTS - Replacement of theLNS-DACS (1/2)" (page 101) and Figure 33 "S8006 BTS -Replacement of the LNS-DACS (2/2)" (page 102)). Thesepipes are included in the LNS-DACS spare part. Extract them

carefully from the mechanical frame of the BTS.d Disconnect the three connectors located on the right side of

the LNS-DACS.

ATTENTIONTwo people are necessary to carry the LNS-DACS.

e Take the LNS-DACS by the handles (a handle for eachperson) and remove it.

4 Reinsertion of the LNS-DACS climatic system

ATTENTIONThe BTS is not powered.

a Place a LNS-DACS nearby.

b Check that the plate of the BTS which supports theLNS-DACS is clean.






CAUTIONRisk of equipment damageThe following step is the insertion of theLNS-DACS in the BTS. During this operation,take care of the gaskets which are located on the

plate which holds the LNS-DACS.

c Take the LNS-DACS by the handles (a handle for eachperson) and insert it carefully in the BTS.

d Tighten the 4 screws that fasten the LNS-DACS on its platein the BTS.

e Connect the 3 connectors located on the right side of theLNS-DACS.

f Insert the two air pipes in the mechanical frame of the BTS(see see Figure 32 "S8006 - BTS - Replacement of theLNS-DACS (1/2)" (page 101) and Figure 33 "S8006 BTS -

Replacement of the LNS-DACS (2/2)" (page 102)). Attach theair pipes to the mechanical frame with the ty-wraps.

g Install the upright in front of the LNS-DACS (1 screw at thetop of the upright (left hand), 1 screw at the bottom of theupright (right hand))


a Power on the BTS: Refer to 3.3.1 “Power-on procedure”(page 33).

b Check the state of the LEDs of the LNS-DACS. The red,yellow, and green LEDs are illuminated when the LNS-DACS

is healthy.c Shut the doors of the cabinet.


--End--






Figure 32S8006 - BTS - Replacement of the LNS-DACS (1/2)






Figure 33S8006 BTS - Replacement of the LNS-DACS (2/2)






5.2.6 Replacement of the LNS-DACS control assemblyTools required

Flat screwdriver

Location

The DACS control assembly is located in the Low Noise DACS.

CAUTIONRisk of equipment damageWear the antistatic bracelet when performing the maintenanceprocedure described below.

Product reference

PEC code: NTSB30BA

CPC code: A0805949

Intervention time


Tools required


• Allen wrench








Procedure

Step Action


DANGERRisk of electric shockThe BTS does not remain supplied.



a Remove the LNS-DACS (see 5.2.5 “LNS-DACS replacement”(page 98))

DANGERRisk of electric shockEnsure that all power supply cables of the

LNS-DACS are disconnected.

b Unscrew the four screws that fasten the cover of theLNS-DACS.

c Lift slowly the cover while disconnecting the ground wire

(the ground wire is located inside the LNS-DACS and it isconnected to the cover). Remove the LNS-DACS cover.

d Remove the front access plate of the LNS-DACS.

3 Removal of the LNS-DACS control assembly

a Identify and clearly label all the connectors on the LNS-DACScontrol assembly (see Figure 34 "Control assembly of theLNS-DACS of the S8006 BTS" (page 106)).

b Remove all the connectors from the LNS-DACS controlassembly.

c Lift the LNS-DACS control assembly off from the four plasticstandoffs (by depressing the top end of the standoffs).

4 Reinsertion of the LNS-DACS control assembly

a Ensure that controller options are set right:

• The switch SW1 has three positions (see Figure 34"Control assembly of the LNS-DACS of the S8006 BTS"(page 106)):






— The first two define the cabinet working temperature.For 35 degrees C operation, set SW1/1 to ’OFF’ andSW1/2 to ’ON’. For 25 degrees C operation, set bothpositions to ’ON’. The choice of cabinet temperature issite dependant.

— The third position over-rides the fan speed control andconstrains the blowers to run always at high-speed.

• The header H1 has four positions and is used to definethe high and low fan speeds. For the LNS-DACS, theshorting links should be in positions 2 and 4.

b Insert the LNS-DACS control assembly on the four plasticstandoffs by pushing the board firmly on the standoffs.

c Insert and connect all the connectors on the LNS-DACScontrol assembly (see Figure 35 "Wiring for the LNS-DACS"(page 107) for the DACS control assembly and "P7"

connectors wiring indications).5 Additional operations

a Replace the front access plate of the LNS-DACS.

b Connect the ground wire between the LNS-DACS and itscover and place the cover on the LNS-DACS.

c Tighten the four screws that fasten the cover of theLNS-DACS.

d Install the LNS-DACS in the cabinet (see 5.2.5 “LNS-DACSreplacement” (page 98))


--End--






Figure 34Control assembly of the LNS-DACS of the S8006 BTS






Figure 35Wiring for the LNS-DACS






5.2.7 Replacement of the BTS filterProduct reference

PEC code: NTSB01FA

CPC code: A0806059

Intervention time


Tools required

Screwdriver


None.

DANGERRisk of electric shockThe BTS remains supplied with the mains power supply.

Location

The BTS filters are located on the doors of the BTS (one BTS filter oneach door).

Procedure

Step Action




Open the doors of the cabinet.

3 Removal of the filter located on the right door

a Remove the part of the air pipe which is located in front of themetallic frame of the filter.






b Remove the eight quarter turns that fasten the metallic frameof the filter.

c Remove the filter.

4 Reinsertion of the filter located on the right door

a Insert a new filter in the metallic frame. Take care to put thefilter in the right way.

b Install this assembly (frame and filter) on the door bytightening the eight quarter turns.

c Install the air pipe in front of the metallic frame (using thety-wraps). Take care to put the end of the air pipe inside theframe (near the filter).

5 Removal of the filter located on the left door

a Remove the eight quarter turns that fasten the metallic frameof the filter.

b Remove the filter.

6 Reinsertion of the filter located on the left door

a Insert a new filter in the metallic frame. Take care to put thefilter in the right way.

b Install this assembly (frame and filter) on the door bytightening the eight quarter turns.


Close the doors of the cabinet.


--End--






5.2.8 Replacement of a LNS-DACS twin blowerTools required

Flat screwdriver

Location

The DACS twin blower is located in the Low Noise DACS.

CAUTIONRisk of equipment damageWear the antistatic bracelet when performing the maintenanceprocedure described below.

Product reference

PEC code: NTSB30CA

CPC code: A0785387

Intervention time


Tools required


• Allen wrench



Location

The DACS twin blowers are located on Figure 37 "LNS-DACS twin blowers

of the S8006 BTS" (page 114).






Procedure

Step Action





a Remove the LNS-DACS (see 5.2.5 “LNS-DACS replacement”(page 98))

DANGERRisk of electric shockEnsure that all power supply cables of the

LNS-DACS are disconnected.

b Unscrew the four screws that fasten the cover of theLNS-DACS.

c Lift slowly the cover while disconnecting the ground wire

(the ground wire is located inside the LNS-DACS and it isconnected to the cover). Remove the LNS-DACS cover.

d Remove the front access plate.

3 Removal of a LNS-DACS twin blower

a Unscrew the four screws which fix the bracket to the basesheetmetal.

b Remove the cover from the plastic wire tray, by lifting up andpulling the cover top out.

c Remove the connector labeled "P4B" for the right blower orthe connector labeled "P4A" for the left blower (see Figure 36"Wiring of the blowers" (page 113)).

d Remove the blower.

4 Reinsertion of a LNS-DACS twin blower

a Insert the twin blower.

b Tighten the four screws that fix the bracket to the basesheetmetal.






c Connect the connector labeled "P4B" to the right blower orthe connector labeled "P4A" to the left blower (see Figure 36"Wiring of the blowers" (page 113)).

d Ensure that any extra wire is located inside the trunking(away from the moving parts of the LNS-DACS, i.e. the

damper).

e Insert the cover on the plastic wire tray.


a Replace the front access plate.

b Connect the ground wire between the LNS-DACS and itscover and place the cover on the LNS-DACS.

c Tighten the four screws that fasten the cover of theLNS-DACS.

d Install the LNS-DACS in the cabinet (see 5.2.5 “LNS-DACS

replacement” (page 98))6 The procedure is complete.

--End--






Figure 36Wiring of the blowers






Figure 37LNS-DACS twin blowers of the S8006 BTS






5.2.9 Replacement of the LNS-DACS gasketProduct reference

CPC codes:

• gasket between the cabinet and the LNS-DACS P0875234

• LNS-DACS environmental gasket R0117842

Intervention time

The intervention time is approximately two hours per gasket.

Tools required

• Lint free cloth

• Solvents MEK or Acetone IPA

• Knife

• Quick set adhesive Permabond 105

• Roller hand 3/4’’ wide 60 durometer

• Rubber gloves talcum free

• Safety glasses


DANGERRisk of electric shockThe BTS does not remain supplied with the mains power supply.


Location

The LNS-DACS gaskets are located between the cabinet and theLNS-DACS.






Procedure

Step Action



Remove the LNS-DACS (see 5.2.5 “LNS-DACS replacement”(page 98)).

3 Removal of a gasket

a Remove the old gasket from the aluminium surface.

DANGERRisk of personal injuryWear gloves and safety glasses for protectionagainst ejection.

b Clean the surface as follows:

1. Use a lint free cloth applicator moistened with solventsMEK or Acetone IPA to wash the aluminium surface untilthe pressure sensitive adhesive is removed.

2. Continue cleaning until all the traces of the pressuresensitive adhesive and the film residue are removed.

3. Let the surface dry for five minutes at ambienttemperature.

c Determine the length of the gasket required and cut it with aknife to the size with a 45 angle at each extremity.

4 Reinsertion of a gasket

a Remove the release liner three to four inches at a time.

b Put the gasket adhesive in place by pressing firmly on the

surface.c Roll the gasket with a moderate pressure to glue it with a

rubber roller 3/4’’ wide.

d Repeat the last operation this time with enough force tocollapse the ‘D’ portion of the gasket. This pressure willensure a full contact of the pressure sensitive adhesive to thealuminium surface.






CAUTIONRisk of equipment damageEnsure the alignment of the roller to the top of thegasket surface. This rolling of the gasket shall bedone at least two times on the entire length of the

gasket.

e Achieve a full adhesive strength of the bond within 12 hours.

f Join the corners by using a quick set adhesive (Permabond105).

g Inspect visually if the unbounded areas of the gasket areremaining.


Reinstall the LNS-DACS (see 5.2.5 “LNS-DACS replacement”(page 98)).


--End--






5.2.10 Repair or replacement of the door gaskets5.2.10.1 Repair of the door gasketsTools required

• Tube of silicone, reference LOCTITE AS310 or equivalent, provided

with a 2-3 mm diameter injector and a mastic gun• Tube of glue, reference LOCTITE 454 or equivalent

• Anti-stick agent, reference LOCTITE DM4 or equivalent

• Solvents MEK or Acetone IPA

• Roller (supplier: Grolleau, reference 0985A)


None.

DANGERRisk of electric shockThe BTS remains supplied.

Location

The door gaskets are located on the doors of the cabinet.






Procedure

Gasket length (procedure applicable on site and in the warehouse)

Step Action

1 Inject a spot of glue LOCTITE 454 on the gasket about every 2cm.

2 Put the gasket in place and press on each spot of glue with yourfinger for at least ten seconds.

3 Use the roller all along the gasket length.

4 Close the doors.

--End--






Gasket corners (procedure applicable in the warehouse)

Step Action

1 Inject the LOCTITE AS310 silicone or an equivalent, with a 2 - 3

mm diameter injector and a mastic gun, in the corner hole. Donot damage the gaskets and do not increase the hole diameter.

2 Apply a light pressure on the corner to avoid the concentration ofa thick silicone layer and to have the silicone excess overflowed(inward and outward side).

3 Check that there is no hole left.

4 Remove the silicone overflow with a clean rag (if possible, try toavoid contact with the skin).

5 Avoid spreading the silicone on the gasket outer surface. Theremust not be any remaining mark of silicone beyond a 5 mm widthon both sides of the 455 cut of the gasket (see Figure 38 "Viewof the door gaskets" (page 122)).

6 Exceptional case:

• If there is no contact between the two gaskets, pour somesilicone with the injector on the two gaskets (see Figure 39"Silicone deposit at a door gasket corner" (page 123)).

• Then, with the finger, press lightly on the gaskets towardsthe gap, r, to concentrate the silicone in the gap. This actionallows not to have a silicone excess inside the gasket.

7 Repeat for each of the other seven gasket corners.

8 Apply a light pressure on each repaired corner, and check thatthe silicone does not overflow anymore. Place your fingers onthe gasket to check that the silicone is quite dry and does nottend to stick.

CAUTIONRisk of equipment damageIf the silicone (on the corners) is not completely drywhen closing the doors, it can stick to the oppositemetal frame of the door. So, when opening the

doors the next time, the gaskets may be damagedirremediably.

--End--






Gasket corners (procedure applicable on site)

Step Action

1 In the case of an in-warehouse retrofit, it is recommended to

perform the above procedure even if the below procedure isapplicable.

ATTENTIONIf the corner join between the vertical and horizontal gaskets is notcompletely closed, it is not a problem, as the silicone barrier ensurescomplete impermeability.

2 Apply the anti-stick agent LOCTITE DM4 (or an equivalent) tothe inner skin of the door in front of the damaged corner. Coveran area of 20 mm square (see Figure 40 "Front view of an innercorner of a door" (page 124)).

3 Apply a line of a LOCTITE AS310 silicone or an equivalent alongthe edge of the gasket :

• For the corners located on the side of the cabinet, applya silicone line along the top and side edge of the gasketextending 10 mm in both directions from the corner (seeFigure 41 "Front view of a door gasket corner" (page125) and Figure 42 "Side view of a door gasket corner" (page126)).

• For the corner located in the middle of the cabinet, apply asilicone line only along the top edge of the gasket extending10 mm in both directions from the center of the door axis (seeFigure 42 "Side view of a door gasket corner" (page 126) and

Figure 43 "Front view of two door gaskets" (page 127)).

4 Close the doors.

--End--






Figure 38View of the door gaskets






Figure 39Silicone deposit at a door gasket corner






Figure 40Front view of an inner corner of a door






Figure 41Front view of a door gasket corner






Figure 42Side view of a door gasket corner






Figure 43Front view of two door gaskets






5.2.10.2 Replacement of the door gasketsProduct reference

CPC codes:

Left door gasket NTSB01HA / A0824989

Right door gasket NTSB01GA / A0824987

Door gasket for the LNS-DACS NTSB01JA / A0824991

Tools required

• Clean lint free cloths

• Non-metallic low abrasive pad

• Gasket PSA roller (Chomerics Ref. C589R1, Grolleau Ref. 0985A)

• Rubber gloves (Talcum free)• One of the following : 3M Natural Cleaner, Acetone, or MEK

• Wooden Tongue Depressor or Equivalent

• Distilled water

• 90% or higher concentration alcohol

• Flat and Phillips head screwdriver


None

DANGERRisk of electric shockThe BTS remains supplied with the mains power supply, so takecare while handling the equipment.

The operationalState of the btsSiteManager object is "enabled’’.

Location

The door gaskets are located on the doors of the cabinet.

Intervention time

The intervention time is approximately two hours.






Procedure

Step Action



If not done yet, open the doors.

3 Gasket removal

ATTENTIONIn all of the following procedures, it is important that the Alodine orgold colored Chromate conversion coating is not removed from thealuminum surfaces.

a Pull out the grounding cables from the Fast-on lugs near thetop hinge side of the doors.

b Remove the two door stay bars by removing the screw andthe retaining piece from the door end of the bars.

c Peel off the existing two door gaskets, either from the doorsor the cabinet.

DANGERRisk of personal injuryObserve the instructions and precautions for theabove products, as they may be hazardous toyour health.

d Use 3M Natural Cleaner, Acetone, or MEK, and a cloth ornon-metallic low abrasive pad to remove all PSA residuewhich remains on the surface. Ensure that the gold Chromateplating is not removed. Repeat as necessary.

e Any excess silicone which remains on the door or cabinetsurface should be peeled off, or scraped off carefully with awooden tongue depressor or equivalent. DO NOT REMOVEthe silicone used to fill the gaps between the differentsections of the cabinet.

f Wash with distilled water and dry with a clean lint free cloth.

4 Gasket preparation

The new gaskets will be applied to the doors, regardless ofwhere they were mounted previously. They mount on the gold






colored aluminum panels riveted to the doors, hereafter referredto as door panels.

NTSB01HA is installed on the left door (as viewed from thefront) so that it is flush with the top, left, and right edges of thedoor panel. NTSB01GA is installed on the right door in the

same manner. NTSB01JA is installed on the door in front of theLNS-DACS.

5 Gasket application

a Put on talcum free rubber gloves.

b On each door panel, clean an area approximately 75 mmwide from each edge with Acetone, MEK, or alcohol anddry with a clean lint free cloth. Allow the surface to drycompletely.

c DO NOT TOUCH this surface with bare hands since the oilfrom the skin will have a detrimental effect on the adhesion

of the new gasket.

d Remove 75-100 mm of the protective backing from the PSAat a time. Start in the upper non-hinge corner of the panel,and press down on the gasket to tack it in place, as you workaround the perimeter. AVOID any finger contact with theadhesive.

e Ensure the strip is in correct position, then press down firmlyto ensure a good mechanical bond over the contact surface.Avoid repositioning, since it will hamper the effectiveness ofthe adhesive and may bend or kink the strip.

f Use the gasket roller with moderate pressure to further tackthe gasket in place. Repeat with enough force to collapse thegasket.

g Reinstall the door stay bars to the doors.

h Reconnect the grounding lugs to the doors.


--End--






5.2.11 Replacement of a DRX (or e-DRX) moduleProduct reference


DRX module for GSM 1800-108dBm NTQA01HA A0666904

DRX module for GSM 1800-110dBm NTQA01KA A0679760

DRX module for GSM 1800 (newdesign)

NTQA01LA A0723996

e-DRX for GSM 1800 NTQA88DA A0797868

Intervention time


Tools required

• Extraction tool P0850747 (inside the cabinet door)• Phillips screwdriver

• 8-mm SMA torque wrench


CAUTIONReplacement of a DRX by an eDRXA lock/unlock TRX must be performed to ensure the coherence

of the notifications sent to the OMC-R.

CAUTIONService interruptionThe service is reduced: in fact, the service is lost for the callsdepending on the faulty DRX (or e-DRX). There is no impact onthe service in case of redundant DRXs or eDRXs.

The service is lost in the case of a configuration O1.

Location

The DRX (or e-DRX) modules are located on Figure 5 "Maximumequipment of an S8006 BTS cabinet" (page 21)






Procedure

Step Action



a Locate the defective module.

b If it has not done yet, set the transceiverEquipment objectassociated with the faulty DRX (or e-DRX) to "locked" at the

OMC-R.c Disconnect the coaxial cables and the connectors on the front

panel (PWR, FH-PCM, TX, RXM, RXD). Disconnect the PWRpower lead first (cable on the DRX INTERCO panel first, thenon the DRX (or e-DRX)).

d In the case of the left DRX (or e-DRX), cut the "Rilsan" ties.

3 Removal of a DRX (or e-DRX) module

a Undo the four fixing screws on the front panel of the DRX (ore-DRX) module.

b Extract the DRX (or e-DRX) with the extraction tool and

remove it.

4 Reinsertion of a DRX (or e-DRX) module

a Check the hardware version number of the DRX (ore-DRX), identified by its PEC code, is compatible with thesWVersionRunning parameter on the transceiverEquipmentobject at the OMC-R. DO NOT TRY to put the DRX (ore-DRX) into service if that condition is not fulfilled.

CAUTIONWorking instructionsCheck Check that the software version of the

DRX (or e-DRX) is compatible with the COAM.

b Insert the DRX (or e-DRX) into the cabinet with the extractiontool.

c Tighten the four fixing screws (see Figure 44 " DRX module"(page 134) and Figure 45 "e-DRX module" (page 135)).







a Reconnect the coaxial cables and the connectors on the frontpanel.

CAUTIONWorking instructionsConnect the cables imperatively in the givenorder.

CAUTIONTightening torquesThe tightening torque of the terminals (TX, RXD,RXM) must be 0.7 N-m ± 0.1. Use the 8-mmSMA torque wrench.

b Connect the following cables: FH-PCM, TX, RXM, RXD,PWR.

c Reconnect the PWR power lead part (cable on the DRX (or

e-DRX) final, then on the DRX INTERCO panel).

d In the case of the left DRX (or e-DRX), attach the cables with"Rilsan" ties.

e Set the transceiverEquipment object to "unlocked" at theOMC-R.

f Check that the DRX (or e-DRX) is up on the MMI and that nounexpected notification has appeared during the maintenanceaction.

g Check the state of the LEDs. They should turn on, then takethe following states:

• "5 V" LED on

• "RES1" LED off

• "AMNU" LED off

• "BDT" LED off

• "LI" LED off

• "TX" LED off

• "ALA" LED off

• "DRX (or e-DRX)" LED on

• "SPU" LED off• "TX" LED off

• "CL" LED off

• "RX" LED off







--End--

Figure 44

DRX module






Figure 45e-DRX module






5.2.12 Replacement of a F-type converterProduct reference

PEC code: NTQA57AA

CPC code: A0651999

Intervention time


Tools required






Location

The F-type converter is located on Figure 5 "Maximum equipment of anS8006 BTS cabinet" (page 21)






Procedure

Step Action




b Put the switch of the F-type converter in the "O" position.

3 Removal of a F-type converter

a Disconnect all the cables on the front panel of the F-typeconverter.

b Undo the four fixing screws on the front panel of the F-typeconverter (see Figure 46 "F-type converter" (page 138)).

c Extract the F-type converter with the extraction tool andremove it.

4 Reinsertion of a F-type converter

a Insert the F-type converter into the cabinet.


c Reconnect all the cables.


Put the switch of the F-type converter in the "I" position.


--End--






Figure 46F-type converter






5.2.13 Replacement of the lightning protectors of the 48 VProduct reference

CPC code: A0681776

Intervention time


Tools required

• Two flat screwdrivers

• One tubular socket wrench size 6

• One screwdriver for recessed-head screws


CAUTIONService interruptionThe 48-V service is lost.

DANGERElectric shockThe BTS remains supplied, so take care while handling the

equipment.


Location

The lightning protectors of the 48-V are located under the cabinet.






Procedure

Step Action



a Access to the 48-V box (this box is located under thecabinet).

b Remove the 48-V fuse (this fuse is located in the fuse panel,

see Figure 5 "Maximum equipment of an S8006 BTS cabinet"(page 21)).

c Open the 48-V box.

3 Removal of a lightning protector

a Disconnect the two wires of a lightning protector and markthem.

b Undo the ground nut.

c Remove a lightning protector.

4 Reinsertion of a lightning protector

a Insert a new lightning protector.

b Tighten the ground nut.

c Reconnect the two wires, following the marks made on thembeforehand.


a Close the 48-V box.

b Put the 48-V fuse back in its place.

c Put the 48-V box back in its place.


--End--






5.2.14 Replacement of a power amplifier (PA)Product reference


PA for GSM 1800 NTQA50FA A0875359

PA for GSM 1800 NTQA50HA A0655060

PA for GSM 1800 NTQA50HB A0800541

Intervention time


Tools required




• 0.7N-m ± 0.1 SMA torque wrench

• 1.5N-m ± 0.1 N torque wrench


CAUTIONReplacment of a (H)(e)PAA lock/unlock or a reset TRX must be made to ensure thecoherence of the control of the number of HePA and PA in the

BTS.

CAUTIONService interruptionThe service is reduced: in fact, the service is lost for the calls ofthe faulty PA.

The service is lost in the case of a configuration O1.

Location

The power amplifiers are located on Figure 5 "Maximum equipment of anS8006 BTS cabinet" (page 21).






Procedure

Step Action




b If it has not done yet, set the transceiverEquipment objectassociated with the faulty DRX (or e-DRX) to "locked" at the

OMC-R.c Disconnect, imperatively in the following order, the coaxial

cables and the connectors on the front panel:

1. the "POWER IN" power lead (cable on the PA INTERCOpanel first, then the PA)

2. then the "DATA I/0", "RF IN", "RF OUT" cables andconnectors

3 Removal a power amplifier

a Undo the four fixing screws on the front panel of the power

amplifier (see Figure 47 "Power amplifier" (page 144)).b Extract the power amplifier with the extraction tool and

remove it.

4 Reinsertion of a power amplifier

a Check the hardware version number of the element accordingto the current release of the system.

b Before putting the power amplifier in place, check that the dcpower cable is above the PCM link.

c Insert the power amplifier into the cabinet.

d Tighten the four fixing screws.5 Additional operations

a Reconnect, imperatively in the following order, the coaxialcables and the connectors on the front panel:






1. the "DATA I/O", "RF IN", "RF OUT" cables andconnectors

2. and last, the "POWER IN" power lead (cable on the PAfirst, then on the PA INTERCO panel)

CAUTIONTightening torquesThe tightening torque of the terminal "RF IN" mustbe 0.7 N-m ± 0.1. Use the 8-mm SMA torquewrench.

The tightening torque of the terminal "RF OUT"must be 1.5 N-m ± 0.1. Use the 19-mm N torquewrench.

b Reset the corresponding DRX (or e-DRX) with its reset button(see Figure 44 " DRX module" (page 134))

c Set the transceiverEquipment object to "unlocked" at theOMC-R.


--End--






Figure 47Power amplifier






5.2.15 Replacement of the power supply rackProduct reference

PEC code: NTQA9101

CPC code: A0651996

Intervention time

The intervention time is approximately 3 hours.

Tools required






Location

The power supply rack is located in the power system compartment onFigure 5 "Maximum equipment of an S8006 BTS cabinet" (page 21).






Procedure

Step Action



Power off the BTS: Refer to 3.3.2 “Power-off procedure” (page34).

3 Removal of the power supply rack

a Disconnect the rectifier cable from the AC box.

b Remove each rectifier as described in 5.2.16 “Replacementof a rectifier” (page 154).

c Disconnect the ground cable.

d Unscrew the two fixing screws no.1 (see Figure 50 "S8006BTS - Power supply rack (type 1)" (page 150) and Figure 51"S8006 BTS - Power supply rack (type 2)" (page 151)).

e Unscrew the fixing screw for the cable "Probe 2".

f Unscrew the six fixing screws no.2 on the fuse panel.

g Remove the fuse panel.h From the top of the power supply rack, disconnect the eight

cables of the PCU, taking care to mark them (see Figure52 "Top view of the PCU of the S8006 BTS (type 1)" (page152) and Figure 53 "Top view of the PCU of the S8006 BTS(type 2)" (page 153)).

i Unscrew the eight screws, fixing the cables.

j Unscrew the four screws of the Rx-splitter panel and pull itlightly.

k Disconnect the two D-sub connectors.

l Unscrew the four fixing screws of the power supply rack.

m Remove the two fillers.

n Disconnect the Abis board.

o Remove the power supply rack.

4 Reinsertion of the power supply rack

a Insert the power supply rack in the cabinet.






b Put the fillers in their place.

c Screw the four fixing screws of the power supply rack.

d Connect the Abis board.

e Connect the two D-sub connectors.

f Screw the four screws of the Rx-splitter panel.

g Reinsert the DRX (or e-DRX)s as described in 5.2.11“Replacement of a DRX (or e-DRX) module” (page 131).

h Insert the fuse panel.

i Tighten the six fixing screws no.2.

j Screw the ground cable.

k Reconnect the cable "Probe 2".

l Insert all the rectifiers.

m Reconnect the rectifier cable on the AC box.5 Additional operation

Power on the BTS: Refer to 3.3.1 “Power-on procedure” (page33).


--End--






Figure 48Power supply rack of the S8006 BTS (type 1)






Figure 49Power supply rack of the S8006 BTS (type 2)






Figure 50S8006 BTS - Power supply rack (type 1)






Figure 51S8006 BTS - Power supply rack (type 2)






Figure 52Top view of the PCU of the S8006 BTS (type 1)






Figure 53Top view of the PCU of the S8006 BTS (type 2)






5.2.16 Replacement of a rectifierProduct reference

PEC code: NTQA91AA

CPC code: A0651991

Intervention time


Tools required




None.

Location

The rectifiers are located in the power system compartment on (see Figure5 "Maximum equipment of an S8006 BTS cabinet" (page 21)).

Procedure

Step Action




On the front panel of the failed rectifier, put the switch of thefaulty rectifier in the "O" position.

3 Removal of a rectifier

a Undo the four fixing screws on the front panel of the rectifier(see Figure 54 " Rectifier of the S8006 BTS" (page 156)).

b Extract the rectifier with the extraction tool and remove it.

4 Reinsertion of a rectifier






a Insert the rectifier with its switch in "O" position, into thecabinet and put it in place by pushing on the top and bottomedges.


5 Additional operationPut the switch of the rectifier in the "I" position.


--End--






Figure 54Rectifier of the S8006 BTS






5.2.17 Replacement of a RF-combiner module (H2D)Product reference

Equipment PEC codes

1800 RF-Combiner Module H2D LNA:

without VSWR NTQA51HA

with VSWR NTQA51JA

without VSWR NTQA55JA

with VSWR NTQA55KA

1800 RF-Combiner Module 2H2D_2SPT 1x4(Outdoor)

NTDS33BB

1800 RF-Combiner Module 2H2D_2SPT 1x4(Indoor)

NTDS33FB

1800 RF-Combiner Module 2H2D_2SPT 1x4 w/ VSWR (Outdoor)

NTQA82JB

1800 RF-Combiner Module 2H2D_2SPT 1x4 w/ VSWR (Indoor)

NTQA82JN

Intervention time


Tools required



• 7/16" torque wrench

• 8-mm SMA torque wrench

• 19-mm N torque wrench


CAUTIONService interruptionThe service is reduced: in fact, the service is lost for the calls of

the faulty RF-combiners.

Location

The RF-combiners modules are located on Figure 5 "Maximum equipmentof an S8006 BTS cabinet" (page 21).






Procedure

Step Action




b Before disconnecting the cables, take care to mark them.

c Disconnect the following cables on the front panel:

CAUTIONWorking instructionsThe connections of the other RF-combiners canhamper the disconnection of the cables.

• the power cable (Pwr/Alarm VSWR)

• the coaxial cables (PA in, Int_0, Antenna)

3 Removal of a RF-combiner module

a Undo the four fixing screws on the front panel (see Figure 55"RF-combiner (H2D)" (page 160)).

b Extract the module with the extraction tool and remove it.

4 Reinsertion of a RF-combiner module


b Insert the RF-combiner module into the cabinet.

c Tighten the four fixing screws.


a Reconnect the coaxial cables.

CAUTIONWorking instructionsConnect the cables imperatively in the givenorder.






CAUTIONTightening torquesThe tightening torque of the terminal "Antenna"must be 25 N-m -0.1/+0.2. Use the 7/16" torquewrench.

The tightening torque of the terminals "Int_0","Int_1", "Ext_0" and ‘‘Ext_1’’ must be 0.7 N-m +0.1. Use the 8-mm SMA torque wrench.

The tightening torque of the terminal "TX_in" ofthe duplexer, of the terminals "PA in" of the H2DRF-combiners must be 1.5 N-m + 0.1. Use the19-mm N torque wrench.

Connect the following cables on the front panel:

• the power cables (LNA Pwr/Alarm, Pwr/Alarm VSWR)

• the coaxial cables (PA_in, Int_0 Antenna)


--End--






Figure 55RF-combiner (H2D)






5.2.18 Replacement of a Rx-splitterProduct reference


Rx-splitter S4 for GSM 1800 NTQA10HA A0666906

Intervention time


Tools required


• Torque wrench


CAUTIONService interruptionThe service is reduced: in fact, the service is lost for the calls ofthe faulty RF-combiners.

Location

The Rx-splitters are located on Figure 5 "Maximum equipment of an S8006BTS cabinet" (page 21).






Procedure

Step Action




b Unscrew the RF cables from the right side to the left side tohave some place to put the extraction tool.

c Undo the two fixing screws no.1 on the higher Rx-splitter, if itis to be replaced.

d Undo the two fixing screws no.2 on the lower Rx-splitter. DONOT DISCONNECT THE RF CABLES.

e Grasp and pull the lower splitter using the top and bottomedges.

f Grasp and pull the higher splitter using the top and bottomedges, if it is to be replaced.

3 Removal of a Rx-splitter

a Disconnect the RF cables on the faulty Rx-splitter.b Remove the Rx-splitter.

4 Reinsertion of a Rx-splitter


b Insert the module into the cabinet.

c Reconnect the RF cables.


a Push the lower and possibly the higher Rx-splitter into the

cabinet.

b Tighten the two fixing screws no.2 on the lower Rx-splitter.

c Tighten possibly the two fixing screws no.1 on the higherRx-splitter.

d Tighten the RF cables from the left side to the right side.







--End--

Figure 56

RX-splitter






Figure 57Higher and lower RX-splitter






5.2.19 Replacement of the AC lightning protectorProduct reference

CPC codes

single-phase AC lightning protector A0797207

neutral plug-in module for the AC lightning protectors A 0773608

phase plug-in module for the AC lightning protectors A07 73606

Intervention time


Tools required

• Screwdriver

• Wrench


CAUTIONService interruptionThe cabinet does not remain supplied: the service will be lost.

Location

The AC lightning protector is located inside the AC box.






Procedure

Step Action



a Power off the BTS: Refer to 3.3.2 “Power-off procedure”(page 34).

b Disconnect the alarm cable from the AC box and the rectifier

cable.c Undo the four quarter-turn screws no.4 on the AC box side

and remove the small cover (see Figure 58 "AC box of theS8006 BTS" (page 167)).

3 Removal of the lightning protector

Unplug the plug-in modules (phase and neutral lightningprotectors) (see Figure 59 "AC lightning protector of the S8006BTS" (page 168)).

4 Reinsertion of the lightning protector

Plug the new plug-in modules.


a Put the small cover back on.

b Tighten the four quarter-turn screws (see Figure 58 "AC boxof the S8006 BTS" (page 167)).

c Connect the alarm cable on the AC box and the rectifiercable.

d Power on the BTS: Refer to 3.3.1 “Power-on procedure”(page 33).


--End--






Figure 59AC lightning protector of the S8006 BTS






5.2.20 Replacement of the thermostatsProduct reference

CPC codes: high temperature thermostat: A0664132

low temperature thermostat: A0664133

Intervention time

The intervention time is approximately four hours.

Tools required

• Stepladder


• Allen wrench


DANGERRisk of electric shockThe BTS does not remain supplied


Location

The thermostats are located on Figure 5 "Maximum equipment of anS8006 BTS cabinet" (page 21).






Procedure

Step Action



a Power off the BTS: Refer to 3.3.2 “Power-off procedure”(page 34).

b Remove the LNS-DACS (see the replacement procedure in

5.2.5 “LNS-DACS replacement” (page 98)) in order to haveaccess to the first thermostat.

c Unscrew the fixing screws on the fuse panel in order to haveaccess to the other thermostat.

d Remove the fuse panel.

e If necessary, remove:

• some DRX (or e-DRX) (see the replacement procedure in5.2.11 “Replacement of a DRX (or e-DRX) module” (page131))

• some Rx-splitters (see the replacement procedure in

5.2.18 “Replacement of a Rx-splitter” (page 161))• the power supply rack (see the replacement procedure

in 5.2.15 “Replacement of the power supply rack” (page145))

3 Removal of the thermostats

a Unscrew the two fixing screws holding the high temperaturethermostat.

b Disconnect the two lugs fixed on the high temperaturethermostat.

c Remove the high temperature thermostat.d Unscrew the two fixing screws holding the low temperature

thermostat.

e Disconnect the two lugs fixed on the low temperaturethermostat.

f Remove the low temperature thermostat.

4 Reinsertion of the thermostats






a Insert the high temperature thermostat.

b Connect the two lugs fixed on the high temperaturethermostat.

c Screw the two fixing screws holding the high temperature

thermostat.d Insert the low temperature thermostat.

e Connect the two lugs fixed on the low temperaturethermostat.

f Screw the two fixing screws holding the low temperaturethermostat.


a If necessary, insert the DRX (or e-DRX) modules, theRx-splitters and the power supply rack.

b Insert the fuse panel.c Screw the fixing screws on the fuse panel.

d Install the LNS-DACS (see the replacement procedure in5.2.5 “LNS-DACS replacement” (page 98)).

e Power on the BTS: Refer to 3.3.1 “Power-on procedure”(page 33).


--End--





173.

Chapter 6 LNS-DACS technical manual

This manual covers installation, maintenance and technical description forthe Low Noise Direct Ambient Cooling System of BTS cabinets, deployedat street level.

6.1 Installation6.1.1 Equipment inspection

Upon receipt, the unit should be inspected immediately for both externaland internal damage. Any such damage should be reported at once tothe carrier and the factory responsible for the unit’s manufacture. Theinspection should be carried out as follows.

Remove the lid by means of the four countersunk screws, disconnect theearthing strap and place carefully to one side. Inspect the inside of the unitfor obvious damage and ensure that all plugs are properly inserted andthat all connections are tight, especially those to the storage capacitor, C1and rectifier bridges, BR1 and BR2.

Reconnect the earthing strap and replace the lid.

6.1.2 InstallationThe unit is now ready for installation and should be positioned carefullyinto place in the BTS cabinet, making sure that the gaskets are not scuffedor damaged in the procedure. Secure the unit into position by means ofM6 screws through the fixing holes located on the two side flanges.





174 Chapter 6 LNS-DACS technical manual

6.1.3 Electrical connections (see label)

Wiring to the unit is effected by connecting the three wire harnesses intotheir corresponding sockets. SKT1 is for dc power, SKT2 for AC powerand SKT3 for alarm outputs c the plugs are all different, so incorrectconnection is not possible.

The unit is factory set to run at an internal cabinet temperature of 25 C andfor fan speed operation. Should alternative settings be desired, remove theaccess plate at the left front of the unit and make adjustments as detailedlater in "Control Options".

Replace the access plate.

6.1.4 Filter clog switch connections (see label)





6.1 Installation 175

Connections to the filter clog switch are made by means of the two plastichoses that exit from the top, right-hand side of the LNS-DACS. The fronthose is the low pressure and the rear the high pressure connection. Theseshould be uncoiled and routed to the appropriate positions on the BTS

cabinet.

The unit is now ready for commissioning.

6.1.5 CommissioningTurn on power to the BTS cabinet; the fans in the LNS-DACS unit willramp up slowly to their normal operational speed. Provided the internaltemperature of the BTS cubicle is below the set temperature (see controloperation), there should be virtually no air exiting from the exhaust ductsat the front of the BTS cabinet. After a while, determined by conditionsof internal cabinet load and external temperature, the internal cabinettemperature will reach the set temperature and the damper will start toopen. This may be inferred by an increase of air from the exhaust portsat the front of the BTS cabinet. After equilibrium has been established, athermocouple or similar device, inserted in the exit duct, should register atemperature close to the chosen set point.

6.1.6 Other checksThere are various other quick tests that can be made to check the correctoperation of the unit.

6.1.7 Filter clog alarmShort circuit the filter clog switch with a suitable wire link. The green LED

should extinguish and the external alarm connection AL2-AL GND shouldgo open circuit.

Remove plug P7 - the blowers should revert to high speed and shortingthe filter clog switch should not generate an alarm.

6.1.8 Air flow failureThis may be tested by disconnecting a blower by removal of either plugP4A or P4B. The red LED should extinguish and the external alarmconnection AL1-AL GND should go open circuit.

If the system is running at the lower fan speed, the other blower shouldrevert to high-speed operation.

6.1.9 Damper operationRemoval of plug P1 simulates a low cabinet temperature and the dampershould close to outside air; shorting plug P7 (with a suitable wire)simulates a high temperature and the damper should open to outside air.






6.1.10 Fan speedFor normal room ambients, the blowers should run at low speed. A shortcircuit on plug P7 simulates a high ambient temperature and should causethe blower speed to increase. A blower failure should cause the otherblower to run at high speed.

6.1.11 Heater circuit failureRemoval of plug P1 will simulate a low temperature condition: the damperwill close (if not already closed) and the heater will energize. To check thealarm, remove power and disconnect one wire from the heater thermostatHRS. Re-apply power and disconnect P1. The heater will not energize, theyellow LED should extinguish and the external alarm connection AL1-ALGND should go open circuit.

6.2 Technical aspects6.2.1 Specification

The range of input supplies is as follows:• AC: 207 to 253 V ac 50Hz (nominal voltage 230 V ac)

• DC: -40.5 to -60 V dc (nominal -54.5 V dc)

6.2.2 ConstructionThe LNS-DACS cabinet is constructed from sheet steel, coated with analuminium/zinc/silicon alloy (Aluzinc 185). The metalwork is left unpaintedto ensure good electrical bonding between the component parts, essentialfor the control of electromagnetic radiation from and into the unit. To avoidcorrosion, no parts are welded.

6.2.3 Twin blowersThe blowers serve to circulate air through the BTS cabinet, to cool theinternal loads. The blowers are brushless dc types, powered either by theinternal transformer/rectifier unit at low temperatures or by the BTS rectifierat normal temperatures.

They incorporate a soft-start feature that ramps up their speed slowlyand minimizes inrush currents. Each provides a fan running signal (5 Vsquare wave), employed to annunciate a fan failure. The blower speed iscontrolled by means of a 0-10 V dc signal.

6.2.4 Air-directing damperThe damper, which rotates around a pivot point close to the base, is usedto control air movement within the LNS-DACS unit. When fully closed, thedamper excludes outside air and air is circulated within the BTS cabinet; atthe other extreme, when the damper is fully open, there is no recirculation





6.2 Technical aspects 177

and the cooling unit operates by drawing in outside air which is then routedthrough the BTS cabinet and ejected via the outlet ducts at the front of theBTS cabinet.

At intermediate positions, the damper is adjusted automatically to

give a mix of recirculated and fresh air to achieve the internal workingtemperature.

6.2.5 Damper modulating motorThe damper is controlled directly by the modulating motor. Operation ofthe damper between extreme positions is achieved within a motor rotationof approximately 45 degrees, so that the motor is not limited by its endstops in either direction. This guarantees a very good seal against outsideor recirculated air, since the motor can apply maximum pressure to thesealing gaskets.

The dc motor that drives the gearbox of the actuator is brushed and ratedfor continuous operation under stalled conditions; its life expectancyis in excess of five years. The actuator is equipped with a feedbackpotentiometer that is used by the controller to control damper position. Thedamper motor can exert a maximum closing force of 5.6 Nm.

6.2.6 Filter clog switchThe filter, located in the BTS cabinet, is monitored by the filter clog switchwhich functions by operating a micro-switch in response to movements ofa large area diaphragm induced by pressure differences either side of it. Itis factory-adjusted to provide a contact closure to the control board whenthe pressure drop across the filter exceeds 50 Pascals.

6.2.7 Temperature control elementsTemperature control of the unit is effected by two high quality thermistors,having an accuracy of +/-0.2 C between 0 and 70 C. The elements areencased in epoxy resin within an aluminium case.

The first device (connected to plug P1 on the control board) is locatedabove a hole on the left-hand side panel. This hole, which communicateswith the exhaust port, ensures that the thermistor is always in a movingair stream, regardless of damper position. The thermistor measures thetemperature of the internal equipment cabinet.

The other thermistor (connected to plug P7 on the control board), islocated in the air inlet duct and measures the ambient air temperature.This information is used to control the speed of the blowers.






6.2.8 HeaterThe heater element, used to maintain the BTS cabinet above +5 C, islocated in the fan outlet duct. It has a rating of 1.25kW at the nominal inputof 230 V ac and is equipped with stainless steel fins, to maximize heattransfer. The element is turned off at +10 C, for rising temperature, and

energized at 5

C for falling temperature.

6.2.9 Heater thermostatThe heater element is protected against over temperature, generatedby air failure or blockage within the BTS cabinet, by a manual-resetthermostat located on the top of the fan discharge duct and over theelement. It is set to alarm at 106.5 C.

6.2.10 Rectifier/capacitor assemblyThe transformer/rectifier unit consists of two rectifier bridges and storagecapacitor, situated towards the front of the cabinet. This arrangement,which is powered by the main transformer, provides approximately 42 Vdc, and is used to supply the blowers at temperatures below 0 C when themain BTS rectifier is inactive.

6.2.11 TransformerThe transformer is a torroidal type. It is encased in epoxy resin that offersprotection against the effects of high humidity likely in the interior of theLNS-DACS. It has an output of 35 V at 4.5 A and a voltage regulation ofless than 5%.

6.2.12 Connection socketsThere are three sockets, positioned on the right-hand side of the unit, for

interconnection to the BTS cabinet.

The top socket (two way) is for dc power, the next (three way) for ACpower, while the bottom socket (4 way) is for alarm outputs from the unit.

6.2.13 Printed circuit assembly (PCA) for control and power distributionControl of the LNS-DACS and power distribution therein is accomplishedby this assembly and is described below in later sections. The controlassembly is tropicalized to afford protection against the effects of highhumidity.

6.2.14 Alarm LEDsThe alarm LEDs, which may be viewed from the front of the LNS-DACSthrough a window in the access plate, are normally illuminated whenhealthy and extinguish on alarm. They are red for fan failure, yellow forheater circuit failure and green for clogged filter.






6.3 LNS-DACS operation6.3.1 General principles

For ’normal’ outside temperatures, the inner cabinet aims to run at aconstant temperature, as defined by the setting on the control assembly.Once achieved, the air damper opens to admit external air, and controls

the inner cabinet environment by mixing appropriate amounts of outsideand recirculated air. The blowers drive air down the rear duct and into theequipment enclosure via slots at the rear. Return air to the LNS-DACS isrouted through the set of holes in the base, with excess air being rejectedfrom the exhaust ducts at the front of the BTS cabinet.

6.3.2 Specific modesThe LNS-DACS functions in four operational modes, dictated solelyby information from the cabinet temperature thermistor (plug P1). Therequired cabinet temperature is defined as Ts.

6.3.3 Low temperature-40 degrees Celsius < Tcab < 10 degrees Celsius

In this region, the heater is energized, the damper is closed to the outside,and air is recirculated via the holes in the base of the LNS-DACS. Thetotal area of these holes is chosen to maintain a near-constant staticpressure on the blowers, irrespective of damper position.

6.3.4 Medium temperature10 degrees Celsius < Tcab < Ts

Once the cabinet temperature has reached 10 C, the heater is switched

off, the damper remains closed, and further heating of the equipmentenclosure is achieved solely by the internal equipment loading.

6.3.5 Normal temperatureTcab = Ts

The control circuitry aims to run the cabinet at Ts, whenever the conditionsof load and external temperature allow. In this regime, the damperposition is controlled automatically by the modulating motor, mixingappropriate amounts of recirculated and external air to maintain a constanttemperature. Excess air is ejected from the vents at the front of the BTScabinet.

6.3.6 High temperatureTcab > Ts






At higher outside temperatures, although the damper is fully open, theLNS-DACS is unable to maintain the cabinet temperature to Ts which nowrises in sympathy with the external temperature. At an outside temperatureof 45 C, the internal cabinet will rise to a nominal 55 C under fully loadedconditions.

6.3.7 Fan speed controlAs long as the cabinet temperature is at, or below, Ts, the fans will berunning at their lower speed setting. However, for ambient temperaturesabove Ts, the damper will be fully open and, when it reaches 35 C, the fanspeed will be increased automatically to minimize the temperature rise inthe internal equipment cubicle. As the outside temperature falls, the fanswill revert to low speed operation at an ambient of 30 C.

This feature is important, since it reduces the acoustic noise for themajority of the year and, more especially at night, when the call density (or

cabinet loading) and outside temperature are likely to be at their lowest.

6.3.8 Control and power distribution assemblyThis section deals with the detailed workings of the printed circuitassembly (PCA). This assembly is responsible not only for control andsupervision of the LNS-DACS, but also for directing both ac and dc powerwithin the equipment.

6.3.9 Power distributionThe alternating supply is routed to plug P2 on the PCA. It then passesthrough an EMC filter, to feed the heater element and main transformerT1. The heater is protected against over temperature by a manual reset

thermostat, HRS.

The secondary winding of T1 feeds bridge rectifier BR1, the dc output ofwhich is smoothed by the computer-grade electrolytic capacitor C1. Theresulting voltage level (approximately 42 V dc at the nominal 230 V acinput) is used to provide power to the direct-drive, dc blowers, the PCAcontrol and supervisory circuitry.

DC power from the BTS rectifier also feeds the PCA on plug P3; thepositive pole (grounded in the BTS cabinet) is connected directly, whilstthe negative pole is routed via a diode of bridge rectifier BR2. For cabinettemperatures between -40 and +7 C, dc power to the LNS-DACS issupplied by the internal transformer-rectifier unit (TRU). Above 0 C, themain TRU in the BTS cabinet becomes active. Because of its higheroutput voltage and the diode effect of the two rectifiers, this TRU nowtakes over the running of the unit and the internal TRU is left on, but idling.






The blowers, fed from plugs P4A and P4B, are fused individually so that acatastrophic failure of one blower will not affect the other. The fuse linksF1 and F2, which are 10 A, fast blow ceramic types, must be replaced byexact equivalents.

6.3.10 Control power suppliesThe control board operates from a 24 V dc supply, produced from the rawrectified supplies by regulator REG1 and associated components. Settingup of the 24 V level is effected by means of potentiometer VR1, the onlyadjustment on the board; this level may be measured on tests points TP1and TP2. The voltage level is factory set and should not be altered exceptin extraordinary circumstances. A center supply of 12 V is also used.

6.3.11 Temperature sensingMeasurement of the cabinet temperature is carried out by aclose-tolerance thermistor (+/-0.2 C in the range 0 to 70 C), linearized bya parallel resistor. The combination is driven by a constant current of 0.5mA. The resulting temperature-dependent voltage is buffered to give anoutput of 46 mV/ C. To ensure a rapid response from the thermistor, itis mounted over a hole in the left-hand side panel of the LNS-DACS, toguarantee a supply of cabinet exhaust air across the device at all times.

6.3.12 Ts referenceThe reference voltage relevant to the cabinet internal temperature isselectable by means of DIL switch SW1. SW1/1 off and SW1/2 on willrun the cabinet at 35 C, whilst SW1/1 on and SW1/2 on will give a Ts of25 C. The actual setting is defined by the user and is dependent on theprevailing weather conditions in the operational area.

6.3.13 Error amplifierInformation from the cabinet temperature thermistor is offset against thevoltage from the actuator feedback potentiometer and fed to an erroramplifier. The output of the error amplifier controls the damper motor drivecircuitry.

6.3.14 Damper motor driveThis circuit is capable of driving the motor in either direction as well asstopping it at any position, as directed by the output of the error amplifier.This balance occurs when the voltage from the error amplifier matches thebuffered output from the feedback potentiometer of the damper motor.

Diodes D1 and D2 provide dynamic braking to the actuator motor. Thisaction prevents unwanted damper movements by forces imposed onthe damper by the static pressure generated at the suction inlets of theblowers.






The temperature change required to move the damper from one extremeto the other is approximately 2 C. To prevent the damper from respondingto very small changes, the control also incorporates a dead zone of 0.6 C.This, and the current limiting imposed by the series resistor during stalledmotor conditions, serves to maximize the life of the actuator motor.

Connections to the modulating motor are effected via connector P5.

6.3.15 Heater drive circuitInformation from the cabinet sensor is also used to control the operationof the heater. For rising cabinet temperature, the heater is de-energizedat +10 C and re-energized at +5 C as the temperature falls. The 5 Chysteresis prevents erratic operation of the heater. The element ispowered by means of relay HTR via the current transformer CT1 andheater safety thermostat HRS. The thermostat must be manually resetfollowing a trip.

6.3.16 AlarmsThe control board features three alarm circuits, two critical and onemaintenance. The alarm relays (RA1, RA2) and respective LEDs areenergized when healthy. The alarm LEDs may be viewed through awindow at the front of the unit.

Volt-free, normally closed contacts for the alarms are routed, via connectorP6, to the customer terminal block. The maintenance alarm appears onterminal AL2, whilst the critical alarms are summarized and fed to terminalAL1. Both outputs are with respect to the AL GND terminal. The alarmcontacts open to alarm. In the event of power failure to the PCA, both

alarms will be activated.

6.3.17 Critical alarm 1: Heater failureOn a call for heating, generated by cabinet temperatures below 5 C, thealarm relay RA1 is held in an energized state provided that current isdetected in the heater element; if there is no current, the relay drops outand an alarm is given. Since this alarm requires current in the heater,it registers any fault in the heater circuit, including element failure,open-circuit thermostat or fractured wire.

6.3.18 Critical alarm 2: Fan failureThe dc blowers, connected to plugs P4A and P4B, each generate a squarewave signal during healthy operation. These signals are used to reset thecounters IC6 and IC7; should either counter time out, the alarm relay RA1is de-energized and an alarm given.

ATTENTIONIf either fan fails, the other one is automatically driven at the higher speed.





6.4 Troubleshooting 183

6.3.19 Maintenance alarm: Filter clogThe pressure drop across the air filter, mounted in the BTS cabinet,is monitored by an adjustable diaphragm switch (factory preset to thespecified static pressure drop). When the filter is deemed to be clogged,the switch closes, de-energizes alarm relay RA2 and an alarm is given.

This alarm is inhibited at high fan speed if the unit is running in the fanspeed option.

6.3.20 Controller optionsSwitch SW1 has three positions - the first two define the cabinet workingtemperature. For 35 C operation, set SW1/1 to off and SW1/2 to on;for 25 C operation, set both positions to on. The choice of cabinettemperature is site-dependent.

The third position over-rides the fan speed control and constrains the

blowers to run always at high speed - with this set-up, the filter clog switchis not inhibited.

The header H1 has four positions and is used to define the high andlow fan speeds. For the LNS-DACS unit, the shorting links should be inpositions 2 and 4. Positions 1 and 3 are reserved for other DACS typeunits.

6.4 TroubleshootingThis section is included to assist the service person - it is not meant tobe an exhaustive list of possible faults since it is anticipated that servicepersonnel will be well trained on the functioning of the unit.

WARNINGIsolate all power supplies to the unit before removing the lid.Lethal voltages are present when the unit is operating, so takecare while handling the equipment.

Symptom Possible Cause Check or Remedy

Heater alarm Thermostat HRS tripped

Fractured or disconnected wire

Faulty control board

Heater element open circuit

Reset HRS, find cause

Make good connection

Change board

Replace element







Filter clog alarm Blocked filter

Maladjusted switch

Faulty clog switch

Change filter

Re-adjust switch

Change switch

Fan failurealarm

Blown fuse on board

Broken connection

Faulty blower

Faulty board

Change fuse, check cause

Check plugs, wires

Change blower

Change board

Fans inoperative

Check ac/dc supplies

Both fuses blown

Faulty board

Rectify

Change and check cause

Change board

Damper notopen

Loose linkage

Open circuit thermistor

Faulty board

Faulty actuator

Reset and tighten

Check thermistor/plug P1

Change board

Check/change

Damper notclosed

Loose linkage

Short circuit thermistor

Faulty board

Faulty actuator

Reset and tighten

Check thermistor/plug P1

Change board

Check/change





6.5 Maintenance 185


Poor tempregulation

Loose linkage

Faulty board

Intermittent thermistor

Faulty actuator

Thermistor location

Reset and tighten

Change board

Check plug P1

Check/change

Check location(s)

Incorrect cabtemp

Board 24 V dc incorrect

Thermistor location

Check TP1,TP2/adjust

Check location(s)

6.5 MaintenanceThe following checks represent the minimal acceptable maintenanceprocedures; failure to carry them out on a regular basis may invalidate thewarranty.

DANGERElectric shockIsolate all power supplies to the unit before removing the lid.Lethal voltages are present when the unit is operating, so takecare while handling the equipment.

6.5.1 Cabinet: Examine

• Examine the cabinet exterior for any obvious defects and repair asnecessary.

• Record and report any defects found.

6.5.2 Modulating motor and linkages: Check

DANGERElectric shock

Isolate all power supplies to the unit before removing the lid.Lethal voltages are present when the unit is operating, so takecare while handling the equipment.

• Depress the clutch on the side of the actuator motor and check, byhand, for smooth operation of the damper. Check that motor rotation






is limited by the extreme damper positions and not by the end stopson the motor.

• Check that linkages are tight and adjust if necessary.

• Check the nylon bush on the actuator rod for wear and replace if

necessary.

• Record and report any defects found.

6.5.3 Control Assembly: Examine

DANGERElectric shockIsolate all power supplies to the unit before removing the lid.Lethal voltages are present when the unit is operating, so takecare while handling the equipment.

• Examine control board for excessive deposits of dust/salts.

• Remove board, if necessary, clean and dry.

• Replace assembly and reconnect plugs.

• Record and report any actions taken.

6.5.4 Connections: Examine

DANGERElectric shockIsolate all power supplies to the unit before removing the lid.

Lethal voltages are present when the unit is operating.

• Examine all electrical connections. Look for any signs of heating(hardened wire ends).

• Change defective wire harness and/or connections.

• Record and report any defects.

6.5.5 Blowers: Examine

DANGERElectric shockIsolate all power supplies to the unit before removing the lid.Lethal voltages are present when the unit is operating.

• Inspect the fan impellers and remove any debris.

• Check that the fan impellers are securely mounted on the fan shafts.Rotate the impellers and ensure freedom of movement.





6.5 Maintenance 187

• In order to check the running operation of the blowers, replace thelid of the LNS-DACS and remove the front access plate. To ensureadequate static pressure on the blowers, the damper must be closed.This may be achieved by disconnecting plug P1. Note! this action willalso energize the heater and should not be prolonged. Restore power

to the LNS-DACS and check that the blowers are running smoothlyand that the bearings are not making excessive noise.

• Blowers deemed faulty should be replaced.

• Replace P1 and access plate.

• Record and report actions taken.





189.

Chapter 7 On-site TIL use

7.1 IntroductionThis chapter presents the actions to be taken in the case of the faultnumber 1067 on the DRX (or e-DRX) or PA equipment.

The TIL can be used on site to confirm the faults at the OMC-R.

The available TIL menus are described in Nortel GSM TML (BTS)Commissioning and Configuration - TML User Guide (411-9001-051).

This chapter presents the actions of an on-site maintenance for thefollowing causes of the 1067 fault number:

• causes for the PA equipment:

— (6815745) Hardware

— (6815746) DRX (or e-DRX) / PA connection

• causes for the DRX (or e-DRX) equipment

— (9437185) RX fault — (9437190) BBFILTER ASIC fault

— (9437193) Self test failed

— (9437194) Major fault on TX

— (9437206) DRX (or e-DRX) link

— (9437216) The TX has not acknowledged the power consignrequest

— (9437217) PA DRX (or e-DRX) control loop fault





190 Chapter 7 On-site TIL use

7.2 Preliminary actions7.2.1 Actions at the OMC-R

Before any intervention, confirm the alarm at the OMC-R:

• Switch the transceiverEquipment to "locked".

• Switch the transceiverEquipment to "unlocked".

• Check that the alarm is identical.

7.2.2 On-site actionsPerform the following actions to identify the alarms.

7.2.2.1 TIL connectionLog on to the TIL (via the link Ethernet connected to the active CMCFboard). Refer to Nortel GSM TML (BTS) Commissioning and Configuration - TML User Guide (411-9001-051).

7.2.2.2 Alarm identificationWhen the cabinet is displayed, perform the following actions.

• click the "DRX" (or e-DRX) object

• display the options

• choose "Alarms"

Eleven different alarms are possible:

• high temperature alarm

• high power alarm• power cabinet alarm

• SWVR alarm

• OOL alarm

• OOL REF alarm

• FH Bus alarm

• dialog problem between ASIC and peripherals

• automatic level control alarm

• MHD or COM alarm

• power amplifier out of order






7.3 Corrective action sheetsThese sheets are given in the following pages.

7.3.1 Alarm: High temperature alarmReaction of the system

This alarm indicates an exceeding of the PA temperature.

PEC code: NTQA21AA

On-site maintenance

Step Action

1 Checks

Check the running of the LNS-DACS climatic system.a If it is correct, go to step 2.

b If it is not correct, perform a corrective action on theLNS-DACS.

2 PA replacement

a Switch the transceiverEquipment corresponding to the faultyPA to "locked".

CAUTIONService interruptionIn most cases, the TRX and one TDMA are lost.

The service is reduced.

b Replace the faulty PA according to the replacementprocedure (see 5.2.14 “Replacement of a power amplifier(PA)” (page 141)).

c Switch the transceiverEquipment corresponding to thereplaced PA to "unlocked".

d Make sure that the fault has been cleared (the alarms aretransferred to the alarm history file of the OMC-R).

e Go to step 3.


--End--






7.3.2 Alarm: High power alarmReaction of the system

This alarm indicates errors concerning the PA power supply.

It concerns the following errors:

• errors on the dc/dc converters of the PA

• errors of an excessive power consumption of the PA

On-site maintenance

Step Action

1 FRU replacement





c Switch the transceiverEquipment corresponding to the

replaced PA to "unlocked".


e Go to step 2.


--End--






7.3.3 Alarm: Power cabinet alarmReaction of the system

This alarm indicates a too weak transmission level at the PA output.

The alarm threshold is equal to the nominal cell power (-6dB).

On-site maintenance

Step Action

1 Checks

a Check the RF cables between the DRX (or e-DRX) and thePA.

b Using the TIL, have the DRX (or e-DRX) transmit in BCCH

mode at the cell frequency (see 7.4 “TX test” (page 207)).

• If the problem persists, go to step 2.

• If the problem disappears, go to step 3.

2 FRU replacement







e Go to step 3.


--End--






7.3.4 Alarm: SWVR alarmReaction of the system

This alarm indicates SWVR errors at the PA output.

On-site maintenance

Step Action

1 Checks

a Check all the cables of the chain: PA-duplexer-feeder-antenna.

b If necessary, tighten the cables at the PA output.

CAUTION

Tightening torquesThe tightening torque of the terminal "RF IN" mustbe 0.7 N-m ± 0.1. Use the 8-mm SMA torquewrench.

The tightening torque of the terminal "RF OUT"must be 1.5 N-m ± 0.1. Use the 19-mm N torquewrench.

c Using the TIL, have the TX transmit in BCCH mode at the cellfrequency (see 7.4 “TX test” (page 207)).


• If the problem persists, go to step 2.

2 FRU replacement



The service is reduced

b Replace the faulty PA according to the replacement

procedure (see 5.2.14 “Replacement of a power amplifier(PA)” (page 141)).



e Go to step 3.







--End--






7.3.5 Alarm: OOL REF alarmReaction of the system

This alarm indicates errors concerning the PLLs that control the DRX (ore-DRX) reference frequencies.

On-site maintenance

Step Action

1 FRU replacement

a Switch the transceiverEquipment corresponding to the faultyDRX (or e-DRX) to "locked".



b Replace the faulty DRX (or e-DRX) according to thereplacement procedure (see 5.2.11 “Replacement of a DRX(or e-DRX) module” (page 131)).

c Switch the transceiverEquipment corresponding to thereplaced DRX (or e-DRX) to "unlocked".


e Go to step 2.2 The procedure is complete.

--End--






7.3.6 Alarm: Asic external linkReaction of the system

This alarm indicates hardware errors concerning the TX in the DRX (ore-DRX).

On-site maintenance

Step Action

1 FRU replacement







e Go to step 2.2 The procedure is complete.

--End--






7.3.7 Alarm: OOL alarmReaction of the system

This alarm indicates errors concerning the PLLs that control the RFtransmission frequency.

On-site maintenance

Step Action

1 Checks

Reset the DRX (or e-DRX) and the PA.

• If the alarm persists, go to step 2.


2 FRU replacement




b Replace the faulty DRX (or e-DRX) according to thereplacement procedure (see 5.2.11 “Replacement of a DRX

(or e-DRX) module” (page 131)).



• If the alarm persists, look for the fault in the boards of theCBCF.

• Otherwise, go to step 3.


--End--






7.3.8 Alarm: Automatic level controlReaction of the system

This alarm indicates that the power closed-loop control of the DRX (ore-DRX)/PA couple is reaching saturation (high or low).

The alarm cause can be:

• a problem in the DRX (or e-DRX)

• a problem on the RF cable between the DRX (or e-DRX) and the PA

• a problem in the PA

• a problem on the "DATA" cable between the PA and the DRX (ore-DRX)

On-site maintenance

Step Action

1 Checks

a Check the "RF" and "DATA" cables.

b If necessary, tighten the "RF" cable.

CAUTIONTightening torques

The tightening torque must be 0.7 N-m ± 0.1. Usethe 8-mm SMA torque wrench.

c Using the TIL, have the TX transmit in BCCH mode at the cellfrequency (see 7.4 “TX test” (page 207)).


• If the alarm disappears, go to step 6.






2 PA replacement


CAUTION

Service interruptionIn most cases, the TRX and one TDMA are lost.




d Using the TIL, have the TX transmit in BCCH mode at the cellfrequency (see 7.4 “TX test” (page 207)).



3 DRX (or e-DRX) replacement









4 Cable replacement

a Replace the following cables:






1. the "FH-PCM" cable between the DRX (or e-DRX) andthe DRX-ICO

2. the "DATA I/O" cable between the DRX (or e-DRX) andthe PA

3. the "RF" cable

CAUTIONTightening torquesThe tightening torque of the terminals of the RF

cables must be 0.7 N-m ± 0.1. Use the 8-mmSMA torque wrench.

b Go to step 1.

5 New PA replacement

a Switch the transceiverEquipment corresponding to the PA to

"locked".CAUTIONService interruptionIn most cases, the TRX and one TDMA are lost.


b Replace the new PA with the old one according to thereplacement procedure (see 5.2.14 “Replacement of a poweramplifier (PA)” (page 141)).

c Switch the transceiverEquipment corresponding to the PA to"unlocked".


• If the alarm persists, the old PA and the old DRX (ore-DRX) are not correct. Go to step 2.

• If the alarm disappears, the old PA is correct and the oldDRX (or e-DRX) is not correct. Go to step 6.


--End--






7.3.9 Alarm: MHD or COM alarmReaction of the system

This alarm indicates a problem on the "DATA" interface between the DRX(or e-DRX) and the PA.

It deals with:

• the loss of the serial connection

• the parity errors

• the checksum errors

On-site maintenance

Step Action

1 Checks

a Check the connection of the "DATA" cables between the DRX(or e-DRX) and the PA (FH-PCM cable between DRX (ore-DRX) and DRXICO and DATA I/O cable between DRXICOand PA).

b Using the TIL, have the TRX transmit in BCCH mode at thecell frequency (see 7.4 “TX test” (page 207)).



2 PA replacement





















• If the alarm persists, replace the "DATA" cables. Go tostep 1.

• if the alarm disappears, go to step 4.

4 New PA replacement

a Switch the transceiverEquipment corresponding to the PA to"locked".



b Replace the new PA with the old one according to thereplacement procedure (see 5.2.14 “Replacement of a poweramplifier (PA)” (page 141)).

c Switch the transceiverEquipment corresponding to the PA to"unlocked".


• If the alarm persists, the old PA and the old DRX (ore-DRX) are not correct. Go to step 1.

• If the alarm disappears, the old PA is correct. Go to step5.







--End--






7.3.10 Alarm: Power surge protectionReaction of the system

This alarm indicates an excessively high input level on the PA.

On-site maintenance

Step Action

1 Checks

a Check the RF wiring between the DRX (or e-DRX) and thePA.

b Using the TIL, have the DRX (or e-DRX) transmit in BCCHmode at the cell frequency (see 7.4 “TX test” (page 207)).

• If the alarm persists, go to step 2.• If the alarm disappears, go to step 3.

2 FRU replacement







e Go to step 3.


--End--






7.3.11 Alarm: FH Bus alarmReaction of the system

This alarm indicates an error on the FH bus.

On-site maintenance

Step Action

If the alarm is systematic

1 Checks

a Check the FH feedback cable of the cabinet.

b Return the DRX (or e-DRX) into service.










e Return the DRX (or e-DRX) into service.

• If the alarm persists, call the BSS manufacturer.



--End--





7.4 TX test 207

7.4 TX test7.4.1 Introduction

This test enables a TX to be configured in a special test mode in order tomonitor its transmission power in a given channel.

The following procedure is performed either in standalone mode (BTSnot operational) or in connected mode after TX isolation (see Nortel GSM TML (BTS) Commissioning and Configuration - TML User Guide (411-9001-051).

7.4.2 TX test procedure

Step Action

1 Equipment installation

Install the measuring equipment on the transmission channel

and check that the transmitter load is correct (see Figure 60"Installation for the TX test procedure" (page 208)).

2 TX isolation

a Isolate the TX.

b Install the test bench of the power measurement.

3 Checks

a For the TX to be examined, run the "BCCH configuration"menu of the PA object.

b Enter the value "44" (maximum output power in dBm).

c Enter the value of the selected channel (either the value ofthe frequency of the TX being measured, or the value "699"that is the central value of the DSC 1800 band).

A message indicates the correct configuration, once the TXreceived the information. The TX begins to transmit.

d Read the value displayed by the measuring device.

e Add the attenuation caused by the measurement and theother one caused by the combiner and the internal cables.

f Check that the final result corresponds to the theoreticalvalue.

4 TX de-isolation

De-isolate the TX.

ATTENTIONThe transmission is stopped during the de-isolation operation.






5 The procedure is complete

--End--

Figure 60

Installation for the TX test procedure



GSM BTS S8006 Troubleshooting

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