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Troubleshooting

DN9913495

© Nokia Corporation

Draft

23 (52)

Issue 3-0 en

Nokia Proprietary and Confidential

Note

Note

5

Troubleshooting

This chapter gives advice on how to identify and rectify possible faults in the
operation of the Nokia MetroSite EDGE Base Station.

Troubleshooting instructions related to BTS commissioning are given in

Nokia

MetroSite EDGE Base Station: Commissioning

.

Detailed descriptions of BTS alarms are presented in

Nokia MetroSite EDGE

Base Station: Alarm Descriptions

. Descriptions of the LED unit status indicators

are presented in Chapter 7 of this document.

Whenever problems occur in the operation of the BTS, connect the Nokia BTS
Manager PC to the interface unit. The LED conditions and the alarm window
usually indicate where and what the problem is. To obtain more information on
the BTS’s status, it is also advisable to be in contact with the BSC by mobile
phone (MS).

5.1

Testing the BTS

If there is any reason to assume that the quality of calls in a cell is degraded, or
that the number of calls in a cell is reduced, the Abis loop test and the TRX test
can be run remotely from the BSC/NMS. A TRX test can also be run locally with
Nokia BTS Manager.

Further troubleshooting tests can also be done locally at the BTS. See the

Troubleshooting checklist

in Section 5.2 of this document and the

LED indicator

conditions

 reference information in Chapter 7 of this document.

All manuals and user guides at all-guides.com

Содержание MetroSite

Страница 1: ...Nokia MetroSite EDGE Base Station DN9913495 Nokia Corporation Draft 1 52 Issue 3 0 en Nokia Proprietary and Confidential Maintenance All manuals and user guides at all guides com a l l g u i d e s c o m ...

Страница 2: ...ftware products cannot be considered binding but shall be defined in the agreement made between Nokia and the customer However Nokia has made all reasonable efforts to ensure that the instructions contained in the documentation are adequate and free of material errors and omissions Nokia will if necessary explain issues which may not be covered by the documentation Nokia s liability for any errors...

Страница 3: ...are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equip...

Страница 4: ...Maintenance 4 52 Nokia Corporation Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en All manuals and user guides at all guides com ...

Страница 5: ...Periodic testing of the BTS 18 4 Adjusting the 13 MHz clock 19 5 Troubleshooting 23 5 1 Testing the BTS 23 5 2 Troubleshooting checklist 24 6 Replacing units 27 6 1 ESD protection 27 6 2 Removing units 28 6 3 Recycling of units 30 6 4 Replacing TRXs 30 6 4 1 TRX slot identification 30 6 4 2 Replacing a slave TRX 31 6 4 3 Replacing the master TRX in BTS configurations with two or more TRXs 33 6 4 4...

Страница 6: ... and Confidential Issue3 0en 7 LED indicator conditions 47 7 1 Transceiver unit LED 47 7 2 Transmission unit LED 48 7 3 Interface unit LED 48 7 4 Power supply unit LED 49 7 5 Fan unit LED 49 Index 51 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Страница 7: ...oubleshooting checklist 24 Table 3 LED conditions for TRX units 47 Table 4 LED conditions for a transmission unit 48 Table 5 LED conditions for an RRI transmission unit s Flexbus LED 48 Table 6 LED conditions for an interface unit 49 Table 7 LED conditions of the power supply unit 49 Table 8 LED conditions for the fan unit 50 All manuals and user guides at all guides com ...

Страница 8: ...e 5 Electro static sensitive device symbol 27 Figure 6 Connecting the antistatic wrist strap 28 Figure 7 Removing the units 29 Figure 8 TRX slot numbering 31 Figure 9 Example Object Properties window in Nokia BTS Manager can be used for blocking a TRX 32 Figure 10 Displacing the sealing strip and releasing the cables 41 Figure 11 HVMF cooling fan assembly and mounting screws 42 Figure 12 HVMF fan ...

Страница 9: ...z clock adjustment procedure Version 3 30th June 2001 Updated for EDGE Added power supply rules new fan controller module BTS chaining Improved 13 MHz clock adjustment illustration Harmonised style Version 3 July 2002 Note added to 13 MHz clock adjustment chapter that a high stability frequency counter is required Version 3 October 2002 BTS Manager 3 0 commands added for replacing transmission uni...

Страница 10: ...Maintenance 10 52 Nokia Corporation Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en All manuals and user guides at all guides com ...

Страница 11: ...okia MetroSite EDGE Base Station Warnings and Cautions before starting the maintenance work This document covers the following preparations for maintenance periodic maintenance measures 13 MHz clock adjustment troubleshooting replacing units LED conditions of the MetroSite EDGE BTS units Refer to the specific software release documentation for software updating instructions All manuals and user gu...

Страница 12: ...Maintenance 12 52 Nokia Corporation Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en All manuals and user guides at all guides com ...

Страница 13: ...lity of the customer to maintain and archive site specific documents 2 1 1 Fault reporting Where possible correct all damage failures and faults and report them to Nokia using the Failure Report Form provided by Nokia Customer Services You can save the alarm information to a log file on your PC with Nokia BTS Manager 2 2 Maintenance equipment Check which tools are needed for the type of maintenanc...

Страница 14: ... cover of the Nokia MetroSite EDGE Base Station is removed to allow for maintenance work the following conditions must be considered 1 Rain or snow must not be allowed to fall on the internal surfaces of the equipment 2 The cover must not be removed during conditions where dust can be blown into the cabinet 2 4 Power supply precautions Potentially lethal voltages The BTS power must be switched OFF...

Страница 15: ...nance procedures Procedure Power supply rule Replacing a power supply unit or PSU cable Power OFF at main disconnect device PSU switch to Stand by Replacing a grounding connection Power OFF at main disconnect device PSU switch to Stand by Disconnecting or connecting antenna or diversity cables on a TRX PSU can be switched to ON but TRX must be blocked Replacing a TRX PSU can be switched to ON but ...

Страница 16: ...ssis 3 When the cover is free pull it away from the cabinet and hang it on the hook at the top left side of the chassis You can also remove the cover completely to place it on the floor Remove the safety strap before pulling the cover away see Figure 1 Figure 1 Safety strap on the MetroSite EDGE BTS cover Fixing point for safety strap under the cover top All manuals and user guides at all guides c...

Страница 17: ... proper circulation of air through the cabinet air inlets and outlets must not be obstructed 3 1 2 Cover Clean the BTS cover of stains and dust whenever necessary Wipe the surface of the cover with a piece of cloth moistened with water and a washing agent Do not use any washing agents that contain alkalis esters ketones or aromatic chlorinated or fluorinated hydrocarbons since these may damage the...

Страница 18: ...of cloth Replace worn or broken seals 3 1 4 Lock Lubricate the lock during site visits with lubricating oil If the cabinet is used in temperatures below 0ºC 32ºF lubricate the lock with lubricating anti freeze oil or use both anti freeze oil and lubricating oil 3 2 Periodic testing of the BTS The condition of the hardware in the MetroSite EDGE BTS can be tested periodically by running the Abis loo...

Страница 19: ... adjustment procedure switch ON the frequency counter and allow for a stabilising time of about 15 minutes or as recommended by the instrument s manufacturer Use only a high stability frequency counter for this procedure Adjusting the 13 MHz clock 1 Remove the rubber dust shield from the side of the interface unit 2 Connect the frequency counter to the X7 connector on the interface unit first sock...

Страница 20: ...top PC 5 Open the calibration menu by selecting OBJECTS on the BTS Manager main menu 6 Select CLOCK CONTROL from the drop down menu 7 In the Clock Control window enter a DAC digital to analogue converter value which will tune the clock to 13 MHz 1 Hz VIFA Unit Frequency counter Laptop fitted with Nokia BTS Manager X7 LMP All manuals and user guides at all guides com ...

Страница 21: ... the box see Figure 3 To increase the frequency increase the DAC value The range of DAC values is from 0 to 4095 providing an adjustment of 25 Hz Figure 3 Clock control window coarse adjustment Fine adjustment of the DAC value slider is achieved by clicking the Use Fine Scale check box in the Clock Control window see Figure 4 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Страница 22: ...he DAC value by clicking the SAVE CURRENT PERMANENTLY button in the Clock Control window Click the CLOSE button or press Enter on your keyboard Saving the DAC value permanently will ensure that it remains in the clock memory after reset 9 When asked if you want to continue select YES in the dialogue box All manuals and user guides at all guides com ...

Страница 23: ...ion of the BTS connect the Nokia BTS Manager PC to the interface unit The LED conditions and the alarm window usually indicate where and what the problem is To obtain more information on the BTS s status it is also advisable to be in contact with the BSC by mobile phone MS 5 1 Testing the BTS If there is any reason to assume that the quality of calls in a cell is degraded or that the number of cal...

Страница 24: ...nection before replacing the cable No power to the BTS 1 Fault in the site mains power supply 1 Check the site s mains power source and fuses Replace if necessary 2 Broken power cable 2 Replace the cable 3 Power supply unit broken 3 Replace the power supply unit 4 Short circuit in one of the BTS units 4 Pull the units out one by one until the power comes back on Start from the TRXs and proceed to ...

Страница 25: ...X connector If the green LED is lit the line interface is OK Otherwise change the transmission unit 4 Transmission unit broken 4 Replace the transmission unit Transmission connection works but there is a yellow LED lit on the transmission unit No real time connection from the network to the transmission unit Establish the BSC connection The device status report in the BTS Manager indicates that th...

Страница 26: ...Maintenance 26 52 Nokia Corporation Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en All manuals and user guides at all guides com a l l g u i d e s c o m ...

Страница 27: ... add units to the Nokia MetroSite EDGE Base Station 6 1 ESD protection Some units in the MetroSite BTS contain electro static sensitive devices The BTS is labelled with an electro static sensitive device symbol as shown in Figure 5 Always use an anti static wrist strap connected to the cabinet ESD stud whenever handling electro static sensitive units The wrist strap and connection stud is shown in...

Страница 28: ...nits out If you are replacing BTS units keep the units protected in their delivery packages until they are needed After installation keep some of the packaging material for packing the removed units when sending them for service Recycle any remaining packaging material Handle the units with care Do not knock the units or place them with their connectors facing the ground Prevent dirt water or snow...

Страница 29: ...ing units If there are any traces of aluminium burrs on the thread replace the screw Spare counterparts for unit retaining screws can be found attached to the uppermost TRX guide beam on the top of the BTS see Figure 7 Power supply unit Interface unit Transmission unit Transceiver units Spare counterparts for unit retaining screws All manuals and user guides at all guides com ...

Страница 30: ...ronmental data package including disassembly instructions and a material balance document is also available via Nokia Professional Services 6 4 Replacing TRXs This section provides instructions on how to replace faulty TRXs There are three different scenarios for replacing TRXs as follows replacing a slave TRX replacing the master TRX replacing the master TRX in a single TRX BTS 6 4 1 TRX slot ide...

Страница 31: ...eplacing a slave TRX 1 Connect your Nokia BTS Manager PC to the LMP connector on the interface unit 2 Block the TRX using Nokia BTS Manager if the sector is not already locked from the BSC In the Supervision Equipment View window right click on the TRX image and select the BLOCK button in the Object Properties dialogue window see Figure 9 T R X 3 T R X 4 T R X 1 T R X 2 All manuals and user guides...

Страница 32: ...ack the new TRX 8 Insert the TRX into the free slot 9 Tighten the TRX retaining screws to 1 5 Nm 11 1 lb ft with a T10 Torx driver 10 Reconnect the TRX cabling 11 Run the TRX test from Nokia BTS Manager optional 12 With Nokia BTS Manager right click the BCF object in the Equipment View window and carry out a BCF Object Reset or if locked from the BSC NMS request an unlock from the BSC NMS the BCF ...

Страница 33: ...ntry block 4 Make a note of the TRX cabling 5 Disconnect the cabling from the faulty master TRX 6 Disconnect the cabling from one of the slave TRXs 7 Open the master TRX retaining screws with Torx T10 driver Loosen the screws enough to remove the unit but leave them engaged in the thread to allow easy refitting 8 Remove the master TRX 9 Open the slave TRX retaining screws with a Torx T10 driver 10...

Страница 34: ... the LMP connector on the interface unit 2 Block the BCF locally with Nokia BTS Manager or request a BCF lock from the BSC NMS 3 If the manager connection can still be established open Traffic Manager from the Transmission menu and export the TS allocation information to your PC s hard disk 4 Open the cable entry block 5 Make a note of the TRX cabling 6 Disconnect the TRX cabling 7 Open the TRX re...

Страница 35: ... type of transmission unit If the transmission unit to be replaced is an FXC RRI type the BTS power must be switched to the stand by position from the switch on the BTS power supply unit before disconnecting the Flexbus cable If the transmission unit to be replaced is an FXC E1 or FC E1 T1 type the outer conductor of the 75 Ohm RX connector can either be grounded capacitively or directly When the ...

Страница 36: ...p then pull the unit out from the side See Figure 7 8 Unpack the new transmission unit 9 Insert the new transmission unit to the unit slot from the side of the cabinet Push the unit towards the backplane Do not use excessive force 10 Tighten the upper and lower retaining screws to 1 5 Nm 1 11 lb ft with a T10 Torx driver 11 Reconnect the unit s cabling 12 Switch the BTS power supply unit to the ON...

Страница 37: ...anager application Nokia BTS Manager restarts automatically Importing cross connection information after replacing an FXC E1 or FXC E1 T1 unit 1 Select TRANSMISSION OPEN from the main menu in Nokia BTS Manager BTS Manager closes and the E1 T1 Manager Transmission Unit Manager application starts and connects to the transmission unit 2 Select CONFIGURATION CROSS CONNECTIONS from the main menu The Cr...

Страница 38: ... 6 Remove the interface unit Pull the unit out from the front until the unit comes to stop then pull the unit out from the side See Figure 7 7 Unpack the new interface unit 8 Insert the new interface unit to the unit s slot from the side of the cabinet Push the unit towards the backplane Do not use excessive force 9 Tighten the interface unit retaining screws to 1 5 Nm 1 11 lb ft with a T10 Torx d...

Страница 39: ...to remove the unit but leave them engaged in the threads to allow easy refitting 5 Remove the power supply unit Pull the unit out from the front until the unit comes to stop then pull it out from the side See Figure 7 6 Unpack the new power supply unit 7 Insert the new power supply unit to the unit s slot from the side of the cabinet Push the unit towards the backplane Do not use excessive force 8...

Страница 40: ... a controller module which is fixed by tapper screws which are accessed from the top of the fan mounting see Figure 12 Version 2 has a controller module which can be removed by accessing the tapper screws from the bottom of the fan mounting see Figure 13 The BTS power must be switched off before replacing the fan unit Turn the switch on the PSU to the stand by position and turn off the power suppl...

Страница 41: ...t be removed in order to remove the fan mounting assembly 5 Detach the outer sealing gasket at the point where it covers the cable entry block see A in Figure 10 6 Remove the two 4 mm 0 157 in Allen screws on the cable entry block See B in Figure 10 7 Open the cable entry block at the point where the cables are routed 8 Disengage the cables from the cable entry block Figure 10 Displacing the seali...

Страница 42: ...e the mounting assembly sideways and disconnect the fan unit s connector from the backplane 2 Remove the three M4 x 60 Torx screws from the fan unit see Figure 12 to release the fan unit and the lower fan guard 3 Remove the two 3 x 10 self tapper screws from the fan controller module see Figure 12 4 Remove the fan unit the fan controller module and the lower fan guard 5 To replace the fan reverse ...

Страница 43: ...Replacing units DN9913495 Nokia Corporation Draft 43 52 Issue 3 0 en Nokia Proprietary and Confidential Figure 12 HVMF fan assembly version 1 All manuals and user guides at all guides com ...

Страница 44: ...laced from the underside the fan assembly mounting must also replaced with a version 2 compatible fan assembly mounting Replacing the HVMF fan version 2 1 Make sure that the PSU is switched to the stand by position and that the power to the BTS is switched off at the main circuit breaker 2 Remove the three M4 x 60 Torx screws from the fan unit to release the fan unit and the lower fan guard See Fi...

Страница 45: ...prietary and Confidential Legend 1 Lower fan guard 2 Fan unit HVMF 3 Fan assembly mounting 4 Fan controller module 5 Tapper screws 3x10 2 pieces 6 Torx screws M4x60 3 pieces Figure 13 HVMF fan assembly version 2 1 2 3 4 6 DN0186406 5 All manuals and user guides at all guides com ...

Страница 46: ...Maintenance 46 52 Nokia Corporation Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en All manuals and user guides at all guides com a l l g u i d e s c o m ...

Страница 47: ... the following units transceiver unit transmission unit power supply unit interface unit fan unit Inform your Operations Manager of any error situations detected on the units and enter the details in the site report 7 1 Transceiver unit LED The conditions on the transceiver unit s LED indicators are specified in Table 3 Table 3 LED conditions for TRX units LED Colour Lit continuously Flashing Gree...

Страница 48: ...onditions for a transmission unit LED colour Lit continuously Flashing Green Power is on and the operation is continuous and error free Unit is currently being accessed with a transmission management device Yellow Orange Control or test ongoing or fault in incoming signal Configuring not in service Red Serious fault or an active test interfering with normal traffic Table 5 LED conditions for an RR...

Страница 49: ...ur Indication Green OCXO operating Yellow OCXO warming up Red OCXO broken Table 7 LED conditions of the power supply unit LED colour Condition Green Unit operating Yellow 1 Output voltage OK switch on the power supply unit is in the ON position BTS in cold start mode 2 Power shut down signal sent from the BSC NMS 3 Output voltage OFF because of a detected overtemperature Red Unit broken or short c...

Страница 50: ...on Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en Table 8 LED conditions for the fan unit LED colour Conditions Green Unit operating Yellow Operation degraded Red Unit broken All manuals and user guides at all guides com ...

Страница 51: ...wer supply unit 49 transceiver unit 47 transmission unit 48 lock lubrication 18 M maintenance periodic 17 Manager software 14 master TRX replacing 33 34 N Nokia BTS Manager 14 P power supply precautions 14 power supply unit LED 49 replacing 39 R recycling 28 removing the cover 15 replacing cooling fan 40 HVMF fan unit version 1 40 HVMF fan unit version 2 44 interface unit 38 power supply unit 39 t...

Страница 52: ...Maintenance 52 52 Nokia Corporation Draft DN9913495 Nokia Proprietary and Confidential Issue3 0en TRX slots 30 TRX test 18 23 U units replacing 27 All manuals and user guides at all guides com ...

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