Note：Wearing an antistatic wrist strap and gloves when performs the operation.If the TRX that related to the faulty PBU board is responsible for the main BCCH, the replacement of the PBU board will interrupt the services of the cell.
1) Block the TRX that related to the faulty PBU.
2) Remove all the cables on the panel of the PBU board.
3) Remove the PBU board from the corresponding slot.
4) Insert the new PBU board into the slot of the faulty board.
5) Reconnect the cables to the panel of the new PBU board.
6) Unblock the TRX that related to the replaced PBU board.
End