Huawei Technologies CRFUD-AWS-CL Multi-Mode Transceiver User Manual Site Maintenance
Huawei Technologies Co.,Ltd Multi-Mode Transceiver Site Maintenance
Maintenance Manual
CRFUD maintenance Guide
Issue
Draft
Date
2012-01-10
HUAWEI TECHNOLOGIES CO., LTD.
CRFUD maintenance Guide
Issue Draft (2012-01-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
ii
Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
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Huawei Technologies Co., Ltd.
Address:
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CRFUD maintenance Guide
Contents
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Copyright © Huawei Technologies Co., Ltd.
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Contents
1.1 Replacing a CRFU ........................................................................................................................................... 4
1.1.1 Prerequisite ............................................................................................................................................. 4
1.1.2 Procedure ................................................................................................................................................ 5
1.1.3 Follow-up Procedure ............................................................................................................................... 7
1.2 Replacing a CRFUd ......................................................................................................................................... 7
1.2.1 Prerequisite ............................................................................................................................................. 7
1.2.2 Procedure ................................................................................................................................................ 8
1.2.3 Follow-up Procedure ............................................................................................................................. 10
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1.1 Replacing a CRFU
A CDMA RF unit (CRFU) processes radio frequency (RF) signals for a base transceiver
station (BTS). CDMA is short for Code Division Multiple Access. This section describes how
to replace a faulty CRFU.
1.1.1 Prerequisite
The following tools and materials are available: electrostatic discharge (ESD) wrist strap,
Phillips screwdriver, ESD box or bag, torque wrench, and keys to the front panel and
cabinet door.
A new intact CRFU is available.
Context
Figure 5-2 shows the CRFU cable connection.
Figure 1-1 CRFU cable connection
Table 1-1 Relationship between CRFU ports and cables
Port
Cable
R1 to R6
RF jumper
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1.1.2 Procedure
Step 1 Record carrier information.
Run the DSP CBTSSECTORCARRIERINFO command to query the IDs of the BTS cells,
sectors, and carriers.
Step 2 Block carriers.
1. Run the BLK RES command to block all carriers in the sector corresponding to the
CRFU. The recommended value of PRI is Low.
2. Run the DSP RES command to check whether the carriers are blocked.
If they are blocked, go to the next step.
Otherwise, go to Step 2.1.
Step 3 Power off the CRFU.
On the direct current distribution unit-11A (DCDU-11A), set the power switch controlling the
power supply for the CRFU to OFF.
Step 4 Remove the faulty CRFU.
1. Remove the cables from the faulty CRFU.
Attach a temporary label to the CRFU power cable and remove the cable.
Attach a temporary label to the RF jumper. Then, use a torque wrench to loosen the DIN
elbow male connector on the RF jumper and remove the cable.
Attach a temporary label to each common public radio interface (CPRI) cable and
remove the cables from the CRFU.
2. Loosen the screws on the CRFU panel.
Use a Phillips screwdriver to loosen the screws on the CRFU panel.
3. Remove the CRFU.
Pull out the key to the front panel to remove the CRFU, as shown in Figure 5-3.
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Figure 1-2 Pulling out the key to the front panel to remove the CRFU
Step 5 Install the new CRFU.
1. Push the new CRFU into the subrack along the guide rail.
2. Use a Phillips screwdriver to tighten the screws on the CRFU panel.
3. Connect previously removed cables to the CRFU.
Connect the connector of each CPRI cable to the CPRI_0 port on the CRFU according to
the temporary label.
Connect the DIN elbow male connector of the RF jumper to the ANT_TX port on the
CRFU and use a torque wrench to tighten the connector with a torque of 25 N·m to 35
N·m (221.27 lbf·in. to 309.78 lbf·in.).
Connect the CRFU power cable and use a Phillips screwdriver to tighten the screws.
Step 6 Power on the CRFU.
On the DCDU-11A, set the power switch controlling the power supply for the CRFU to ON.
Step 7 Load the CRFU software.
Run the LST BTSAUTOLD command to check whether auto load is enabled for the BTS.
If Auto Load Flag is ON, the CRFU automatically loads software from the back
administration module (BAM).
If Auto Load Flag is OFF, run the DLD CBTSSW command to load the CRFU
software.
Step 8 Unblock the carriers.
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Run the UBL RES command to unblock the carriers.
Step 9 Observe the RUN indicator on the CRFU to check whether the CRFU works properly.
If the RUN indicator blinks 1 second on and 1 second off, the CRFU works properly.
----End
1.1.3 Follow-up Procedure
After the replacement, perform the following operations:
1. Record the version, board name, slot number, and site name of the faulty board.
2. Check whether there is visible physical damage on the board, for example, mechanical
parts or plug-ins are distorted, pins are bent or missing, or the board is burnt.
3. Record the information about the fault location process, including the cause of the fault,
fault symptoms, alarm name, status of indicators on the board panel, and detailed
procedures for identifying and clearing the fault on site.
4. Place the faulty board in an antistatic bag. Then, place the onsite fault record and the
antistatic bag in the board box, and store them properly.
1.2 Replacing a CRFUd
A CDMA RF unit (CRFUd) processes radio frequency (RF) signals for a base transceiver
station (BTS). CDMA is short for Code Division Multiple Access. This section describes how
to replace a faulty CRFUd.
1.2.1 Prerequisite
The following tools and materials are available: electrostatic discharge (ESD) wrist strap,
Phillips screwdriver, ESD box or bag, torque wrench, and keys to the front panel and
cabinet door.
A new intact CRFUd is available.
Context
Figure 5-4 shows the CRFUd cable connection.
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Figure 1-3 CRFUd cable connection
Table 1-2 Relationship between CRFUd ports and cables
Port
Cable
R1 to R6
RF jumper
1.2.2 Procedure
Step 1 Record carrier information.
Run the DSP CBTSSECTORCARRIERINFO command to query the IDs of the BTS cells,
sectors, and carriers.
Step 2 Block carriers.
1. Run the BLK RES command to block all carriers in the sector corresponding to the
CRFUd. The recommended value of PRI is Low.
2. Run the DSP RES command to check whether the carriers are blocked.
If they are blocked, go to the next step.
Otherwise, go to Step 2.1.
Step 3 Power off the CRFUd.
On the direct current distribution unit-11A (DCDU-11A), set the power switch controlling the
power supply for the CRFUd to OFF.
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Step 4 Remove the faulty CRFUd.
1. Remove the cables from the faulty CRFUd.
Attach a temporary label to the CRFUd power cable and remove the cable.
Attach a temporary label to the RF jumper. Then, use a torque wrench to loosen the DIN
elbow male connector on the RF jumper and remove the cable.
Attach a temporary label to each common public radio interface (CPRI) cable and
remove the cables from the CRFUd.
2. Loosen the screws on the CRFUd panel.
Use a Phillips screwdriver to loosen the screws on the CRFUd panel.
3. Remove the CRFUd.
Pull out the key to the front panel to remove the CRFUd, as shown in Figure 5-5.
Figure 1-4 Pulling out the key to the front panel to remove the CRFUd
Step 5 Install the new CRFUd.
1. Push the new CRFUd into the subrack along the guide rail.
2. Use a Phillips screwdriver to tighten the screws on the CRFUd panel.
3. Connect previously removed cables to the CRFUd.
Connect the connector of each CPRI cable to the CPRI_0 port on the CRFUd according
to the temporary label.
Connect the DIN elbow male connector of the RF jumper to the ANT_TX/RXB port on
the CRFUd and use a torque wrench to tighten the connector with a torque of 25 N·m to
35 N·m (221.27 lbf·in. to 309.78 lbf·in.).
CRFUD maintenance Guide
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Connect the CRFUd power cable and use a Phillips screwdriver to tighten the screws.
Step 6 Power on the CRFUd.
On the DCDU-11A, set the power switch controlling the power supply for the CRFUd to ON.
Step 7 Load the CRFUd software.
Run the LST BTSAUTOLD command to check whether auto load is enabled for the BTS.
If Auto Load Flag is ON, the CRFUd automatically loads software from the back
administration module (BAM).
If Auto Load Flag is OFF, run the DLD CBTSSW command to load the CRFUd
software.
Step 8 Unblock the carriers.
Run the UBL RES command to unblock the carriers.
Step 9 Observe the RUN indicator on the CRFUd to check whether the CRFUd works properly.
If the RUN indicator blinks 1 second on and 1 second off, the CRFU works properly.
----End
1.2.3 Follow-up Procedure
After the replacement, perform the following operations:
1. Record the version, board name, slot number, and site name of the faulty board.
2. Check whether there is visible physical damage on the board, for example, mechanical
parts or plug-ins are distorted, pins are bent or missing, or the board is burnt.
3. Record the information about the fault location process, including the cause of the fault,
fault symptoms, alarm name, status of indicators on the board panel, and detailed
procedures for identifying and clearing the fault on site.
4. Place the faulty board in an antistatic bag. Then, place the onsite fault record and the
antistatic bag in the board box, and store them properly.