AAU3940 Hardware Maintenance Guide Issue 01 Date 2015-01-15 HUAWEI TECHNOLOGIES CO., LTD.
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AAU3940 Hardware Maintenance Guide About This Document About This Document Overview This document describes routine maintenance for an AAU3940 such as equipment maintenance and power-on and power-off operations. It also describes how to replace the AAU, modules in it, and optical modules. Product Version The following table lists the product versions related to this document. Product Name Solution Version Product Version DBS3900 l SRAN10.0 and later V100R010C00 and later l RAN17.
AAU3940 Hardware Maintenance Guide About This Document This section describes the process and precautions for powering on and powering off an AAU. 4 Replacing an AAU This section describes how to replace a faulty AAU. Replacing an AAU interrupts all the services carried by the AAU and causes alarms. 5 Replacing the Optical Module You must disconnect the fiber optic cable from an optical module before replacing the optical module. Disconnecting the fiber optic cable interrupts transmission of CPRI signals.
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AAU3940 Hardware Maintenance Guide Contents Contents About This Document.....................................................................................................................ii 1 Changes in AAU3940 Hardware Maintenance Guide............................................................1 2 Routine Hardware Maintenance Items.....................................................................................2 3 Powering On and Powering Off an AAU.................................................
AAU3940 Hardware Maintenance Guide 1 Changes in AAU3940 Hardware Maintenance Guide 1 Changes in AAU3940 Hardware Maintenance Guide This chapter describes changes in AAU3940 Hardware Maintenance Guide. 01 (2015-01-15) This is the first commercial release. Compared with issue Draft A (2014-10-30), no information is added to or deleted from this issue. Compared with issue Draft A (2014-10-30), this issue includes the following changes.
AAU3940 Hardware Maintenance Guide 2 2 Routine Hardware Maintenance Items Routine Hardware Maintenance Items Routine hardware maintenance for an AAU improves reliability of the AAU. You are advised to perform routine hardware maintenance yearly. DANGER While working at heights, be careful not to drop any tools, equipment, or other objects. Falling objects may cause serious injury or death. Always wear a helmet and avoid standing in the danger area.
AAU3940 Hardware Maintenance Guide 2 Routine Hardware Maintenance Items No. Item 12 All RET cables (optional) are free from wear, cuts, cracks, or other damage. 13 All RET cable (optional) connectors are sealed properly. If any of the statements in the checklist cannot be complied with, perform the following corrective actions: 1. Tighten all connections. 2.
AAU3940 Hardware Maintenance Guide 3 3 Powering On and Powering Off an AAU Powering On and Powering Off an AAU About This Chapter This section describes the process and precautions for powering on and powering off an AAU. 3.1 Powering on an AAU This section describes the procedure and precautions for powering on an AAU. 3.2 Powering off an AAU An AAU can be powered off in two ways: normal power-off and emergency power-off.
AAU3940 Hardware Maintenance Guide 3 Powering On and Powering Off an AAU 3.1 Powering on an AAU This section describes the procedure and precautions for powering on an AAU. Context DANGER l Before powering on a base station, check that the positive and negative wires of all power cables are correctly connected. Any incorrect power cable connection may cause damage to equipment or unexpected injuries of human body.
AAU3940 Hardware Maintenance Guide 3 Powering On and Powering Off an AAU Figure 3-1 Process of powering on an AAU NOTE l The normal input voltage of an AAU is 220 V AC and should range from 200 V AC to 240 V AC. l When an AAU is working properly, the RUN indicator is blinking (on for 1s and off for 1s), and the ALM indicator is steady off. For details about indicators, see AAU3940 Hardware Description. 3.
AAU3940 Hardware Maintenance Guide 3 Powering On and Powering Off an AAU 1. Shut off the external input power of the power equipment for the AAU. 2. If time permits, set the corresponding circuit breaker on the power equipment for the AAU to OFF. ----End Issue 01 (2015-01-15) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU 4 Replacing an AAU This section describes how to replace a faulty AAU. Replacing an AAU interrupts all the services carried by the AAU and causes alarms. Prerequisites l The following tools and materials are available: an ESD wrist strap or a pair of ESD gloves, a flat-head screwdriver, a Phillips screwdriver, a torque screwdriver, a hex key, and an ESD box or bag.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU Figure 4-1 Removing the landscaping cover from the AAU 2. Loosen the screws on the cover of the maintenance cavity, and open the cover. 3. Record cable connections on the AAU and remove all cables, including the power cable, CPRI fiber optic cable, and PGND cable. NOTE l If the AAU is installed on a pole or a wall, the PGND cable connects to the ground bolt on the attachment plate. In this case, remove the PGND cable.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU l If the AAU is installed on a pole or wall, use a torque screwdriver to loosen the captive bolts on the attachment plate and remove the AAU with both hands, as shown in Figure 4-2. l If the AAU is installed on a pole top, use a torque screwdriver to loosen the four bolts securing the AAU, and remove the AAU with both hands, as shown in Figure 4-3.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU Figure 4-3 Removing an AAU from a Pole Top Step 6 Install a new AAU. l Issue 01 (2015-01-15) In the pole installation or wall mounting scenario: 1. Place the attachment plate on the maintenance cavity of the AAU, and use a torque screwdriver to tighten the screws to 7 N·m (61.95 lbf·in.), as shown in Figure 4-4. 2.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU Figure 4-4 Installing the attachment plate NOTE The following figure shows the installation in the wall mounting scenario, installing an AAU on a pole is the same. Issue 01 (2015-01-15) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU Figure 4-5 Securing the AAU l Issue 01 (2015-01-15) In the pole top installation scenario: 1. Hold the AAU tightly with both hands and insert it into the mounting bracket on the pole top, and use four M6 hexagon socket-head cap bolts to secure the AAU to 7 N·m (61.95 lbf·in.), as shown in the following figure. 2. Install the landscaping cover. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU Figure 4-6 Installing an AAU on a pole top Step 7 Install AAU cables. 1. Open the cover for the maintenance cavity of the AAU. 2. Reconnect cables to the AAU according to the previous record, and ensure that waterproof blocks are inserted into vacant ports. 3. Close the cover for the maintenance cavity of the AAU. Step 8 Set the corresponding circuit breaker on the power equipment for the AAU to ON.
AAU3940 Hardware Maintenance Guide 4 Replacing an AAU NOTE The status of indicators on an AAU that works normally is as follows: l RUN indicator: blinking l ALM indicator: steady off l ACT indicator: steady on For details about indicators, see section "Ports and Indicators" in AAU3940 Hardware Description. Step 9 Take off the ESD wrist strap or ESD gloves, and pack up all tools. Step 10 Inform the remote engineer that the AAU has been replaced.
AAU3940 Hardware Maintenance Guide 5 Replacing the Optical Module 5 Replacing the Optical Module You must disconnect the fiber optic cable from an optical module before replacing the optical module. Disconnecting the fiber optic cable interrupts transmission of CPRI signals. Prerequisites l To confirm the type of a faulty module, perform the following steps: – Run the DSP BTSOPTMODULE command on the BSC LMT. – Run the DSP OPTMODULE command on the NodeB LMT. – Run the DSP SFP command on the eNodeB LMT.
AAU3940 Hardware Maintenance Guide 5 Replacing the Optical Module l Optical modules are hot-swappable. l It takes about five minutes to replace an optical module on the AAU, which involves disconnecting the fiber optic cable, removing the faulty optical module, inserting a new optical module, reconnecting the fiber optic cable, and waiting for CPRI links to restore. Procedure Step 1 Put on an ESD wrist strap or a pair of ESD gloves.
AAU3940 Hardware Maintenance Guide 5 Replacing the Optical Module Step 6 Insert the optical connector into the new optical module. Step 7 Check the transmission of CPRI signals by observing the status of CPRI0 and CPRI1 indicators. For details about the status of the indicators, see the ports and indicators on an AAU of related manuals of RRU hardware descriptions. Step 8 Take off the ESD wrist strap or ESD gloves, and pack up all tools.
