ALD Maintenance Link Failure 26541

TROUBLESHOOTING GUIDE

ANTENNA LINE DEVICE COMPONENTS

REMOTE CONTROL UNIT

RET ANTENNA

AISG 2.0 CABLE

SMART BIAS TEE

TOWER MOUNTED AMPLIFIER

•OPEN LMT SOFTWARE• USER: admin• LMT IP: 17.21.2.15• PC IP: 17.21.2.10-18 • PASSWORD: NodeB

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PRESS BROWSE ALARM TO SEE ALARM DETAILS

DOUBLE CLICK ALARM TO SEE DETAILED INFORMATION.

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Click Solution tab to get moreHelp on troubleshooting procedure.

SOFTWARE SOLUTION

HARDWARE SOLUTION

HOW TO DEAL WITH THE PROBLEM

DSP ANTCON

NOTE: Power Supply Port default value for N0A, N2A & N4A is always ON state.

SOFTWARE SOLUTIONIn MML command line type in

SOFTWARE SOLUTION

SET ALDPWRSW to OFF and then to ON Check results using DSP ANTCON.ON STATE: SMBT HAS CURRENT

CONSUMPTIONOFF STATE: SMBT HAS ZERO

CONSUMPTION

Reset ALD POWER SWITCH

IF in ON STATE THERE IS ZERO CURRENT CONSUMPTION AND/OR CANNOT SWITCH OFF AND ON the status, THEN SMBT /TMA IS DEFECTIVE.

SOFTWARE SOLUTION

Remove and Add the affected ALD. RMV ALD

Example Remove the ALD named 0_0N0A0RET_3G.RMV ALD: NAME ="0_0N0A0RET_3G";

ADD ALDExample

1. Regular installation scenario: Add a single RET antenna named 0_0N0A0RET_3G to antenna connector N0A in subrack 3 of cabinet 0 corresponding to sector 0 in NodeB site 0.ADD ALD: NAME="0_0N0A0RET_3G", CASE=REGULAR, DEVTP=SINGLE_RET, CN=0, SRN=3, ACN=N0A;

Use the command SCN ALD to verify ALD status after using RMV ALD and/or ADD ALD commands.

SOFTWARE SOLUTION

CLB ANT Example

1. Calibrate the RET antenna named 0_0N0A0RET_3G.CLB ANT: OPMODE=NAME, NAME="0_0N0A0RET_3G";2. Calibrate the RET antenna connected to antenna connector N0A in subrack 3 of cabinet 0.CLB ANT: OPMODE=CSAT, SRN=3, ACN=N0A, DEVTP=SINGLE_RET;

SET ANTTILTExample

1. Set the tilt of the RET antenna named 0_0R0A0RET_3G to 2°.SET ANTTILT: OPMODE=NAME, NAME="0_0R0A0RET_3G", TILT=20;2. Set the tilt of the RET antenna connected to antenna connector R0A in subrack 60 of cabinet 0 to 2°.SET ANTTILT: OPMODE=CSAT, SRN=60, ACN=R0A, DEVTP=SINGLE_RET, TILT=20;

Check RCU functionality

Check Failure Cause:--Not Calibrated---------check HARDWARE--Motor Fault-------------check HARDWARE--RCU not in Position—check HARDWARE

SOFTWARE SOLUTION

Reset the affected ALD.

RST ALD Example

1. Reset the RET antenna named 0_0N0A0RET_3G.RST ALD: OPMODE=NAME, NAME="0_0R0A0RET_3G";

If alarm not cleared using SOFTWARE SOLUTION,then go to HARDWARE SOLUTION

CHECK AISG CABLE FUNCTIONALITY

USE MULTIMETER TO CHECK THE CONNECTIVITY OF EACH PINPINS 1, 3, 5, 6, 7 SHORTED = CABLE is OKIf one or more of the PINS 1, 3, 5, 6, 7OPEN = CABLE is defective

HARDWARE SOLUTIONHOW TO CHANGE AISG CABLE

1. SET ALDPWRSW to OFF2. Replace AISG cable.3. SET ALDPWRSW to ON

HARDWARE SOLUTIONHOW TO CHANGE/REMOVE RCU

1. RMV ALD and then SCN ALD to verify the ALD is removed

2. SET ALDPWRSW to OFF. 3. Remove RCU device and cable.4. Install RCU device and cable.5. SET ALDPWRSW to ON. Then, ADD ALD 6. SCN ALD to scan the new ALD device.7. DLD ALDCFG to load the configuration of RCU if new

RCU is used.

ALDCFG is located on the NodeB software.

HOW TO CHANGE SMBT/TMA

HARDWARE SOLUTION

1. BLK BRD ( N0A=SN 0, N2A=SN 2, N4A-SN 4)2. SET TXSW to OFF.3. Remove SMBT/TMA devices and cables.4. Install SMBT/TMA devices and cables.5. SET TXSW to ON.6. UBL BRD.

THANK YOU

THE END