Table of Contents
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On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
I.
External check
1)
Power supply
Mainly check if the - 48 DC power input is normal, see "1.2
Maintenance Instructions" for details.
2)
Transmission link
Check if the transmission link between the BCIM of the BTS and
the XIE board of the BSC is secure, see "3.3 BTS Control Interface
Module (BCIM )" for details.
3)
GPS receiving signal
GPS signal is directed into the BCKM and processed by the
clock unit after received by the GPS antenna and feeder system, see
"3.4 BTS Control & Clock Module (BCKM)" for details.
II.
Cabinet components
First check the PSU of the power subrack, and then the boards
(including BCIM, BCKM, BCPM, BRDM and BTRM), and finally the
RF units (including the BHPA, CDU/DFU/DDU, RLDU and the
antenna and feeder system).
1)
Power supply
Mainly check the PSU in the power subrack. If a PSU failure is
spotted, you should check if the - 48V DC power inlet on top of the
cabinet is in normal condition while going through the "3.10
Supply Unit (PSU)" for solutions.
Chapter 3 Component Failure
3-2
Handling
Power
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Table of Contents
Troubleshooting
