CRFU Maintenance Guide Issue 02 Date 2008-11-30 Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For any assistance, please contact our local office or company headquarters.
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Step 8 Unblock the carriers.................................................................................................... 7 Step 9 Ensure that the new CRFU module is functional.................................................. 7 Postrequisite......................................................................................................................................... 7 1 Replacing the CRFU This describes how to replace the faulty CRFU.
(1) RF jumpers (2) Cable connected to the CPRI port (3) (3) Power cable Procedure Step 1 Record information of the carriers. Run the DSP CBTSSECTORCARRIERINFO command to query the cell IDs, sector IDs, and carrier IDs. Step 2 Block the carriers. 1. Run the BLK RES command to block all carriers of the sectors where the CRFU is located. The recommended priority value is "low". 2. Run the DSP RES command to query whether the carriers are blocked. If the carriers are blocked, proceed with the next step.
Step 3 Power off the AC surge protection box. Set the air-break switch controlling the CRFU on the DCDU to OFF. Step 4 Remove the faulty CRFU. 1. Remove faulty cables of the CRFU. Disconnect power cables of the CRFU and attach temporary labels to the removed power cables. Use a torque wrench to loosen the DIN 7/16 angle male connector of the RF jumper, disconnect the RF jumper, and attach temporary labels to the RF jumper.
Step 5 Install the new CRFU. 1. Install the CRFU. Push the new CRFU along the guide rail into the subrack. 2. 3. Fasten the CRFU screws. Connect the CRFU cables. Insert the connector of the CPRI-port cable into the CPRI_0 port of the CRFU according to the temporary labels. Insert the DIN 7/16 angle male connector of the RF cable into the ANT port of the CRFU and use a torque wrench to tighten the DIN angle male connector. The force moment ranges 25 N·m to 35 N·m.
If the automatic loading function is enabled for the RRU3606, the RRU3606 automatically loads software from the BAM. If the auto-loading function of the RRU3606 is disabled, run the DLD CBTSSW command to load the software. Step 8 Unblock the carriers. Run the UBL RES command to unblock the carriers. Step 9 Ensure that the new CRFU module is functional. RUN indicator: ON for 1s and OFF for 1s. ----End Postrequisite After replacing the CRFU, perform the following steps: 1.
