Product Info

DN9913495 © Nokia Corporation Draft 5 (52)
Issue 3-0 en Nokia Proprietary and Confidential
Contents
Contents 5
List of tables 7
List of figures 8
1 About this document 11
2 Preparations for maintenance 13
2.1 Site folder 13
2.1.1 Fault reporting 13
2.2 Maintenance equipment 13
2.2.1 Nokia BTS Manager 14
2.3 Environmental precautions 14
2.4 Power supply precautions 14
2.5 Removing the BTS cover 15
3 Periodic maintenance 17
3.1 Maintaining the cabinet 17
3.1.1 Fan unit and air circulation 17
3.1.2 Cover 17
3.1.3 Seals 18
3.1.4 Lock 18
3.2 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 Replacing the master TRX in a single TRX BTS 34
6.5 Replacing the transmission unit 35
6.6 Replacing the interface unit 38
6.7 Replacing the power supply unit 39
6.8 Replacing the cooling fan 40
6.8.1 Replacing the HVMF cooling fan, version 1 40
6.8.2 Replacing the HVMF cooling fan, version 2 44