
On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station Table of Contents
iii
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