fpma_nokia flexi wcdma base station

8/17/2019 FPMA_Nokia Flexi WCDMA Base Station

http://slidepdf.com/reader/full/fpmanokia-flexi-wcdma-base-station 1/31

Maintaining the Stand-alone BaseStation

DN7037846Issue 1 en

# Nokia Corporation 1 (31)

471449ANokia Flexi WCDMA Base Station



The information in this document is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This document is intended for the useof Nokia's customers only for the purposes of the agreement under which the document issubmitted, and no part of it may be reproduced or transmitted in any form or means without the

prior written permission of Nokia. The document has been prepared to be used by professionaland properly trained personnel, and the customer assumes full responsibility when using it.Nokia welcomes customer comments as part of the process of continuous development andimprovement of the documentation.

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

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

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

NOKIA logo is a registered trademark of Nokia Corporation.

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

Copyright © Nokia Corporation 2006. All rights reserved.

2 (31) # Nokia Corporation DN7037846Issue 1 en

Maintaining the Stand-alone Base Station



Contents

Contents 3

1 Performing routine maintenance tasks 5

2 Replacing module fans 72.1 Replacing module fans from the back 72.2 Replacing module fans from the front 9

3 Replacing modules 133.1 Replacing RF Module 133.2 Replacing System Module 163.3 Replacing transmission sub-module 193.4 Replacing FPMA power sub-modules 22

3.4.1 Replacing AC/DC sub-module FPAA 223.4.2 Replacing battery sub-modules FPBA 27

DN7037846Issue 1 en


Contents



1 Performing routine maintenance tasksPurpose

Perform these steps during normal site visits to ensure that the base station staysin good condition.

Steps

1. Check the fans and air circulation.

When needed, clean the fans of leaves and debris and free air inlets andoutlets of obstructions to maintain proper air circulation and prevent overheating of the BTS. Keep the BTS environment clean of dust.

2. Check the connector seals.

Check the connector seals visually. Replace worn or broken seals.

3. Check the cable connectors.

4. Check the screws.

Check the tightness of the module fixing screws. Replace all damaged or missing screws.

DN7037846Issue 1 en


Performing routine maintenance tasks



2 Replacing module fans

2.1 Replacing module fans from the back

Purpose

If a module fan fails, it must be replaced with a new one. Replacing the fan fromthe back of the module requires a back access and the minimum 200 mmmaintenance space behind the BTS. If there is not enough space for replacing thefans from the back, the fans can also be replaced from the front. See Replacing module fans from the front for more detailed instructions.

Before you start

Warning

Risk of personal injury. Do not touch the rotating fans.

Caution

The modules may be damaged if operated for a long time in the upper ambient temperature range. Replace a faulty unit as soon as possible.

DN7037846Issue 1 en


Replacing module fans



Summary

Figure 1. Replacing module fan from the back

Steps

1. Shut down the module.

Tip

It is also possible to replace the fans during operation, however, it has to be doneas quickly as possible as otherwise the module will shut down due to overheating.

2. Connect the ESD wrist strap on the plinth.

4

5

6

DN7037822

3





3. Detach the module back cover.

4. Disconnect the fan cables.

5. Detach the screws and the fan plate from the module core.

6. Remove the fan plate.

7. Install the new fan plate and connect the fan cable.

8. Reinstall the module back cover.

2.2 Replacing module fans from the front

Purpose

If a module fan fails, it must be replaced with a new one. Replacing the fan fromthe back of the module requires a back access and the minimum 200 mmmaintenance space behind the BTS. If the required space is not available, themodules can be replaced from the front of the base station by pulling out themodule core. The module core can be pulled out without dismounting the modulestack.

Before you start

Caution

The modules may be damaged if operated for a long time in the upper ambient temperature range. Replace a faulty unit as soon as possible.

Summary

DN7037846Issue 1 en





Figure 2. Replacing module fan from the front

3

Loosenthe screws4 5

7

6

87

9

10

11

12

DN7089078





Steps

1. If you are replacing an RF Module fan

Then

See Replacing RF Module for instructions how to remove the modulecore from the casing.

2. If you are replacing a System Module fan

Then

See Replacing System Module for instructions how to remove themodule core from the casing.

3. Disconnect the module front panel cables.

4. Loosen the cable entry screws and remove the cable entries.

5. Detach module fixing screws.

6. Pull out the module core from the casing.

7. Disconnect the fan cables.

8. Detach the screws and the fans from the module core.

9. Remove the fan plate.

10. Install the new fan plate.

11. Connect the fan cable.

12. Insert the core in the module casing.

13. Fix the core to the casing with screws.

Tighten the screws to 5 Nm.

14. Install cable entries.

15. Connect the cables to the module front panel.

16. Reroute and coil up the cabling.

DN7037846Issue 1 en





3 Replacing modules

3.1 Replacing RF Module

Purpose

If an RF Module fails and you have done troubleshooting, the RF Module coremust be replaced with a new one. The module core can be replaced without dismounting the module stack.

Before you start

The RF Module core can be replaced without shutting down the BTS; the SystemModule and the remaining RF Modules remain functional during the operation.

Summary

DN7037846Issue 1 en


Replacing modules



Figure 3. Replacing RF Module

5 6

Loosenthe screws8 9

DN7037776

10

11

15

Tightenthe screws

1213





Steps

1. Connect the ESD wrist strap to your wrist and then to the plinth.

2. Run down the faulty RF Module with Nokia WCDMA BTS SiteManager.

3. Loosen the screws and remove the module front panel cover (if installed).

4. Switch off the faulty RF Module fuse on the FPFA.

5. Disconnect the internal power cable on the RF Module front panel.

6. Disconnect the rest of the cables on the RF Module front panel.

Keep the optical cable connectors clean.

7. Pull aside all the cabling routed in front of the RF Module to bereplaced, if any.


9. Detach the module fixing screws.


Warning

The module is heavy. Take care when lifting the module.

11. Insert the new core in the module casing.

12. Fix the core to the casing with screws and tighten to 5 Nm.

13. Install the cable entries and tighten the screws.

14. Install the optical transceiver to the RF Module.

15. Connect the cables to the RF Module front panel as instructed in theCabling the BTS and Creating Configurations document.

DN7037846Issue 1 en


Replacing modules



a. Connect the antenna cables. b. Connect the optical cable.c. Connect the internal power cable.

16. Coil up and reroute the cabling.

17. Push the connector seals firmly in place.

18. Switch on the RF Module fuse on the System Module front panel.

19. Commission the BTS with Nokia WCDMA BTS Site Manager.

3.2 Replacing System ModulePurpose

If the System Module fails, the module core must be replaced with a new one.The module core can be replaced without dismounting the module stack.

Before you start

The BTS must be shut down when the System Module is replaced.

Summary





Steps

1. Run down the BTS with the Nokia WCDMA BTS Site Manager.

2. Shut down the BTS by pulling out the four fuses on the RF Module.

3. Disconnect the DC power mains breaker.


5. If you have the front panel cover installed

Then

loosen the screws and remove the module front panel cover.

6. Disconnect the cables in the System Module front panel.



9. Pull the module core out of the casing.

10. Disconnect the power cable.

11. Uninstall the transmission sub-module.

12. Install the transmission sub-module to the new module core.

13. Connect the power cable to the System Module (FPFA) of the newmodule core.

Check that the polarity is correct.

14. Insert the new core in the module casing.

15. Fix the core to the casing with screws and tighten to 5 Nm.

16. Install the cable entries and tighten the screws.

17. Install the optical transceivers to the System Module.

18. Connect the cables to the System Module front panel.

19. Reroute and coil up the cabling.






21. Switch the site mains breaker on.

22. Restart and commission the BTS.

3.3 Replacing transmission sub-module

Purpose

If the transmission sub-module fails, or the transmission configuration changes,the sub-module needs to be replaced with a new one.

Before you start

The BTS must be shut down when the System Module is replaced.

Summary

DN7037846Issue 1 en


Replacing modules



Figure 5. Replacing transmission sub-module

10

11

Tightenthe screws

1617

16

15

check that the connector is straight

12

12

14

DN7089081

6

Loosenthe screws8

9





Steps

1. Run down the BTS with Nokia WCDMA BTS Site Manager.

2. Shut down the BTS by pulling out the four fuses on the RF Module.

3. Disconnect the DC power mains breaker.


5. If you have the front panel cover installed

Then

loosen the screws and remove the module front panel cover.

6. Disconnect the cables on the System Module front panel (if needed).

7. Disconnect the transmission cables.




11. Loosen the 4 x M5 screws and detach the transmission sub-module.

12. Check that the FCM-FTM connection card on the System Module isstraight.

13. Align the new transmission sub-module with the two guide pins in theSystem Module, and push the sub-module in place.

14. Fix the transmission sub-module with 4 x M5 screws.

15. Insert the module core inside the module casing.

16. Fix the core to the casing with screws. Tighten to 5 Nm.

17. Install cable entries and tighten the screws.

18. Re-connect the disconnected cables to the System Module front panel(if needed).


DN7037846Issue 1 en


Replacing modules



20. Switch on the mains power.

21. Restart and reconfigure the BTS.

3.4 Replacing FPMA power sub-modules

3.4.1 Replacing AC/DC sub-module FPAA

Before you start

It is recommended that power be switched off from the AC mains breaker.However, there can still be hazardous voltage in case batteries are used.

Steps

1. Remove the FPMA module front cover.

2. Switch off the power from the stand-by switch.

3. Remove the ingress protection plate.

4. Pull out the AC terminal plate.

DN70142401

Detach

3

Loosen





5. Disconnect the AC cable of the faulty FPAA.

6. Disconnect the alarm cable, if used.

7. Disconnect the DC cable.

DN70142413

4

5

DN70142425

66

DN7037846Issue 1 en


Replacing modules



8. Remove the FPAA screws (2 pcs).

9. Replace the FPAA with a new one.

DN70142437

7

DN70142449

8





10. Fix the screws.

11. Re-connect the cables.a. Re-connect the AC cables.

b. Re-connect the alarm cables.

DN70142452

9

10

DN70142476

11a

DN7037846Issue 1 en


Replacing modules



c. Re-connect the DC cables.

Make sure that the LED is yellow at this point.

12. Re-install the ingress protection plate.

DN70142488

11b

DN70142491

11c





13. Turn on the unit by pushing the power switch for one second.

Make sure that the LED is stable green.

14. Install the FPMA module front cover.

3.4.2 Replacing battery sub-modules FPBA

Before you start

The FPBA is a Lithium-Ion battery and its transportation is classified asdangerous. Therefore only an approved brand-new UN class 9 package can beused for transportation of the FPBA unit. An opened package cannot be used anymore. An approved package can be ordered from the Nokia Service Center. If there are any visible damages in the FPBA unit, it cannot be transported at all. Inthat case, contact the Nokia Service Center.

Note

The transportation of the FPBA unit must be done according to the internationalDGR regulations.

DN70142507

Fix the screw

Tighten

12

DN7037846Issue 1 en


Replacing modules



Steps

1. Remove the FPMA module front cover.

2. Switch off the power from the FPAA stand-by switch.

3. Disconnect the DC cable from the faulty FPBA.

4. Disconnect the alarm cable, if used.

DN70142764

2

DN70142776

3





5. Remove the FPBA screws (2 pcs).

6. Replace the FPBA with a new one.

DN70142791

4

DN70142822

5

6

DN7037846Issue 1 en


Replacing modules



7. Fix the screws.

8. Re-connect the cables.

a. Re-connect the alarm cable.

b. Re-connect the DC cable.

DN70142846

7a

DN70143003

7b





Make sure that the LED is yellow at this point.

9. Turn on the unit by pushing the power switch for one second.

The LED is blinking slowly green as the FPBA goes into the chargingmode. Once the FPBA is fully charged (approx. 8 hours), the LED is stablegreen.

10. Install the FPMA module front cover.

Replacing modules

fpma_nokia flexi wcdma base station

Documents