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After replacing the faulty BBU3900 case, check the following items: On the M2000 or LMT, the related alarms are cleared. A UE can access the cell carried by the BBU3900. Contact the local Huawei office to handle the faulty BBU3900 case. Issue 07 (2009-08-30) Huawei Proprietary and Confidential...
If the version is earlier than the version in the existing network, upgrade the software. ----End Postrequisite Record the bar code of the replaced board. Contact the local Huawei office to handle the faulty board or module. 5.3 Replacing a WBBP Replacing a WBBP disrupts all the services carried by the NodeB. Prerequisite The tools and materials, such as an ESD wrist strap or a pair of ESD gloves, Phillips screwdriver, ESD box or bag, dustfree cloth, and key to the cabinet door are ready.
Step 7 On the LMT, run the UBL BRD command to unblock the new WBBP. ----End Postrequisite Contact the local Huawei office to handle the faulty WBBP. 5.4 Replacing a UPEU The UPEU is the power module of the BBU and provides power for the boards in the BBU. The UPEU supports the -48/+24V V DC input.
For details on the LED of the UPEU, see the UPEU. ----End Postrequisite Contact the local Huawei office to handle the faulty UPEU. 5.5 Replacing a UTRP The UTRP is the BBU3900 main control and transmission board, replacing the UTRP disrupts all the services carried by the NodeB.
For details on the LED of the UTRP, see the UTRP. ----End Postrequisite Contact the local Huawei office to handle the faulty board or module. 5.6 Replacing a UBFA The UBFA is the fan module in the BBU. The UBFA and the air inlet box in the BBU form a ventilation loop, implementing forced heat dissipation for the BBU.
For details on the LED of the UBFA, see the UBFA. ----End Postrequisite Contact the local Huawei office to handle the faulty UBFA. 5.7 Replacing a DCDU-01 Module The DCDU-01, installed under the BBU, supplies DC power for the cabinet and has the function of surge protection.
Ensure that the related alarms are cleared on the M2000 or LMT after the equipment is powered on. Contact the local Huawei office to handle the faulty DCDU-01 module. 5.8 Replacing the FAN Unit The FAN unit works with the air inlet box in the cabinet to form a ventilation path. The FAN unit provides forced ventilation and dissipation for the BBU and RFU.
Ensure that the related alarms are cleared after the equipment is powered on. Contact the local Huawei office to dispose of the faulty FAN unit. 5.9 Replacing the PMU When the PMU is faulty and cannot be repaired in time, you must replace it.
The RUN LED on the panel blinks green at 0.5 Hz after the PMU is powered on. On the M2000 or LMT, the related alarms are cleared. Contact the local Huawei office to handle the faulty PMU. 5.10 Replacing a PSU When a PSU is faulty and cannot be repaired in time, you must replace it.
The power LED on the PSU is ON (green) after the PSU is powered on. On the M2000 or LMT, the related alarms are cleared. Contact the local Huawei office to handle the faulty PSU. 5.11 Replacing a WRFU Module This describes how to replace WRFU.
On the M2000 or the LMT, the alarms related to the RFU module are cleared after the RFU module is powered on. Contact the local Huawei office to handle the faulty RFU module. 5.12 Replacing the Power Supply Subrack of the BTS3900 The power supply subrack is located in the lower cabinet of the BTS3900.
Check the cables and ensure that they are correctly and tightly connected. Ensure that the related alarms are cleared after the equipment is powered on. Contact the local Huawei office to handle the faulty power supply subrack. Issue 07 (2009-08-30)
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