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On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
3.12 Satellite Antenna and Feeder ..................................... 3-28
3.12.1 Fault Description ............................................. 3-28
3.12.2 Troubleshooting............................................... 3-28
Chapter 4 Component Replacement ........................................ 4-1
4.1 Common Procedure of Replacement .............................. 4-1
4.1.1 Board Replacement ............................................. 4-1
4.1.2 Backplane Replacement ...................................... 4-4
4.2 Exceptional Procedure of Replacement .......................... 4-8
4.2.1 BTS E1 Surge Protector (BESP) .......................... 4-8
4.2.2 BTS Control & Clock Module (BCKM) ................... 4-9
4.2.3 BTS Control Interface Module (BCIM) ................. 4-10
4.2.4 BTS Channel Process Module (BCPM) ............... 4-10
4.2.5 BTS Resource Distribution Module (BRDM) ........ 4-11
4.2.6 BTS FAN Module (BFAN) .................................. 4-11
4.2.7 Power Supply Unit (PSU) ................................... 4-12
4.2.8 BTS RF Fan Module (BRFM) ............................. 4-12
4.2.9 BTS High Power Amplifier Unit (BHPA)............... 4-13
4.2.10 BTS Transceiver Module (BTRM) ..................... 4-14
4.2.11 Receive LNA Distribution Unit (RLDU) .............. 4-15
4.2.12 Duplexer Unit (CDU, DFU, DDU) ...................... 4-16
4.2.13 Optical Fiber Replacement ............................... 4-18
Chapter 5 Component Indicators............................................. 5-1
5.1 BTS Control & Clock Module (BCKM) ............................. 5-1
5.2 BTS Control Interface Module (BCIM)............................. 5-2
5.3 BTS Channel Process Module (BCPM)........................... 5-3
5.4 BTS Resource Distribution Module (BRDM) .................... 5-4
5.5 BTS Transceiver Module (BTRM) ................................... 5-5
5.6 BTS RF Fan Module (BRFM) ......................................... 5-6
5.7 Receive LNA Distribution Unit (RLDU)............................ 5-7
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Troubleshooting
