Huawei Technologies RRU3201-B13 Remote Radio Unit User Manual Hardware Maintenance Guide

Huawei Technologies Co.,Ltd Remote Radio Unit Hardware Maintenance Guide

UserManual_Hardware.pdf

RRU3201Hardware Maintenance GuideIssue 04Date 2011-09-15HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial BaseBantian, LonggangShenzhen 518129People's Republic of ChinaWebsite: http://www.huawei.comEmail: support@huawei.comIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.i
About This DocumentPurposeThis document describes routine maintenance procedures for an RRU3201 (referred to as RRUin this document), such as equipment preventive maintenance and power-on and power-offoperations. It also explains how to replace the RRU and optical modules.Product VersionsThe following table lists the product versions related to this document.Product Name Product VersionDBS3900 V100R004 and later versionsDBS3900 LTE V100R003C00 and later versions Intended AudienceThis document is intended for:lSystem engineerslSite maintenance engineersOrganization1 Changes in the RRU3201 Hardware Maintenance GuideThis chapter describes the changes in the RRU3201 Hardware Maintenance Guide.2 Preventative Maintenance Items for an RRUPreventative maintenance for an RRU improves the reliability of the RRU. You are advised toperform scheduled maintenance yearly.3 Powering On and Off an RRURRU3201Hardware Maintenance Guide About This DocumentIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.ii
After an RRU is powered on, check the status of RRU indicators and voltage. Before the RRUis powered off, follow the normal power-off or emergency power-off procedure as required.4 Replacing an RRUA distributed base station consists of RRUs and a BBU. Replacing an RRU interrupts all theservices carried by the RRU, and alarms are generated.5 Replacing an Optical ModuleAn optical module implements optical-electrical conversion, enabling optical transmissionbetween an RRU and other devices. You must disconnect fiber optic cables from an opticalmodule before replacing the optical module. Disconnecting the fiber optic cables interrupts thetransmission of CPRI signals.ConventionsSymbol ConventionsThe symbols that may be found in this document are defined as follows.Symbol DescriptionIndicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.Indicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.Indicates a tip that may help you solve a problem or savetime.Provides additional information to emphasize or supplementimportant points of the main text. General ConventionsThe general conventions that may be found in this document are defined as follows.Convention DescriptionTimes New Roman Normal paragraphs are in Times New Roman.Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.Italic Book titles are in italics.Courier New Examples of information displayed on the screen are inCourier New.RRU3201Hardware Maintenance Guide About This DocumentIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iii
Command ConventionsThe command conventions that may be found in this document are defined as follows.Convention DescriptionBoldface The keywords of a command line are in boldface.Italic Command arguments are in italics.[ ] Items (keywords or arguments) in brackets [ ] are optional.{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.{ x | y | ... }*Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.[ x | y | ... ]*Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected. GUI ConventionsThe GUI conventions that may be found in this document are defined as follows.Convention DescriptionBoldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.>Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder. Keyboard OperationsThe keyboard operations that may be found in this document are defined as follows.Format DescriptionKey Press the key. For example, press Enter and press Tab.Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn. RRU3201Hardware Maintenance Guide About This DocumentIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iv
Mouse OperationsThe mouse operations that may be found in this document are defined as follows.Action DescriptionClick Select and release the primary mouse button without movingthe pointer.Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.Drag Press and hold the primary mouse button and move thepointer to a certain position.RRU3201Hardware Maintenance Guide About This DocumentIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.v
ContentsAbout This Document.....................................................................................................................ii1 Changes in the RRU3201 Hardware Maintenance Guide.....................................................12 Preventative Maintenance Items for an RRU...........................................................................33 Powering On and Off an RRU....................................................................................................53.1 Powering On an RRU.........................................................................................................................................63.2 Powering Off an RRU........................................................................................................................................64 Replacing an RRU.........................................................................................................................85 Replacing an Optical Module...................................................................................................11RRU3201Hardware Maintenance Guide ContentsIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vi
1 Changes in the RRU3201 HardwareMaintenance GuideThis chapter describes the changes in the RRU3201 Hardware Maintenance Guide.04 (2011-09-15)This is the fourth official release.Compared with issue 03 (2011-04-15), this issue does not add any information.Compared with issue 03 (2011-04-15), this issue incorporates the following change:Topic Change Description5 Replacing an Optical Module Optimized the description of the feature thatoptical modules are hot-swappable. Compared with issue 03 (2011-04-15), this issue does not remove any information.03 (2011-04-15)This is the third official release.Compared with issue 02 (2011-03-15), this issue does not add any information.Compared with issue 02 (2011-03-15), this issue incorporates the following change:Topic Change Description4 Replacing an RRU Added the commands for querying electroniclabels of boards online. Compared with issue 02 (2011-03-15), this issue does not remove any information.RRU3201Hardware Maintenance Guide 1 Changes in the RRU3201 Hardware Maintenance GuideIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.1
02 (2011-03-15)This is the second official release.Compared with issue 01 (2011-01-20), this issue does not add any information.Compared with issue 01 (2011-01-20), this issue incorporates the following change:Topic Change Description4 Replacing an RRU Added the procedures for querying electroniclabels of boards. Compared with issue 01 (2011-01-20), this issue does not remove any information.01 (2011-01-20)This is the first official release.Compared with draft A (2010-12-15), this issue does not add any information.Compared with draft A (2010-12-15), this issue incorporates the following change:Topic Change Description4 Replacing an RRU Optimized the figure of replacing an RRU. Compared with draft A (2010-12-15), this issue does not remove any information.Draft A (2010-12-15)This is the draft.Compared with issue 02 (2010-07-30) of V100R002C00, this issue does not add any information.Compared with issue 02 (2010-07-30) of V100R002C00, this issue does not incorporate anychange.Compared with issue 02 (2010-07-30) of V100R002C00, this issue does not remove anyinformation.RRU3201Hardware Maintenance Guide 1 Changes in the RRU3201 Hardware Maintenance GuideIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.2
2 Preventative Maintenance Items for an RRUPreventative maintenance for an RRU improves the reliability of the RRU. You are advised toperform scheduled maintenance yearly.DANGERWhile working at heights, be careful not to drop any tools, equipment, or other objects. Fallingobjects may cause serious injury or death. Always wear a helmet and avoid standing in the dangerarea.The items in the following checklist are not mandatory but strongly recommended. Table 2-1lists the preventative maintenance items for an RRU.Table 2-1 Preventative maintenance items for an RRUSN Item1All RRUs are properly installed and in good condition.2 Cables are sealed properly at the entry points of the cabinet.3 All radio frequency (RF) cables are free from wear, cuts, cracks, or other damage.4 All RF cable connectors are sealed properly.5 All RF cable conduits are in good condition.6 All power cables are free from wear, cuts, cracks, or other damage.7 All power cable connectors are in good condition.8 All power cable conduits are in good condition.9 All shield layers of power cables are in good condition.10 All power cables are sealed properly.11 All CPRI fiber optic cables are free from wear, cuts, cracks, or other damage.12 All screws are tightened on the cover plate of the maintenance cavity.RRU3201Hardware Maintenance Guide 2 Preventative Maintenance Items for an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.3
SN Item13 All RET cables (optional) are free from wear, cuts, cracks, or other damage.14 All RET cable (optional) connectors are sealed properly. If any of the statements in the checklist cannot be complied with, perform the followingcorrective actions:1. Tighten all connections.2. Report any other faults found when filling in the checklist to the supervisor, because onlytechnically-qualified and trained field engineers are permitted to climb towers for furtherrepairs.RRU3201Hardware Maintenance Guide 2 Preventative Maintenance Items for an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.4
3 Powering On and Off an RRUAbout This ChapterAfter an RRU is powered on, check the status of RRU indicators and voltage. Before the RRUis powered off, follow the normal power-off or emergency power-off procedure as required.3.1 Powering On an RRUSet the corresponding circuit breaker on the auxiliary power device for the RRU to ON, andcheck the operating status of the RRU by observing the status of RRU indicators.3.2 Powering Off an RRUAn RRU can be powered off in two ways: normal power-off and emergency power-off. Youmust power off an RRU in a normal situation such as moving the equipment or anticipating aterritorial blackout. You must also power off an RRU in an emergency such as a fire, smoke, orwater immersion occurs in the equipment room.RRU3201Hardware Maintenance Guide 3 Powering On and Off an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.5
3.1 Powering On an RRUSet the corresponding circuit breaker on the auxiliary power device for the RRU to ON, andcheck the operating status of the RRU by observing the status of RRU indicators.PrerequisitelThe RRU hardware is installed and RRU cable connections are secure.lThe input voltage of the RRU ranges from -36 V DC to -57 V DC.ContextCAUTIONAfter you unpack an RRU, you must power on it within 24 hours. If you power off the RRU formaintenance, you must restore power to the RRU within 24 hours.ProcedureStep 1 Set the corresponding circuit breaker on the auxiliary power device for the RRU to ON to poweron the RRU.DANGERDo not look into the optical module without eye protection after the RRU is powered on.Step 2 Keep the RRU running for three to five minutes to check the status of RRU indicators. Fordetails, see RRU Indicators.Step 3 Take corresponding actions based on the status of the indicators.If... Then...The RRU is working properly End the power-on check task.The RRU is faulty Set the circuit breaker to OFF. Rectify thefault, and then go to Step 1. ----End3.2 Powering Off an RRUAn RRU can be powered off in two ways: normal power-off and emergency power-off. Youmust power off an RRU in a normal situation such as moving the equipment or anticipating aRRU3201Hardware Maintenance Guide 3 Powering On and Off an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.6
territorial blackout. You must also power off an RRU in an emergency such as a fire, smoke, orwater immersion occurs in the equipment room.ProcedurelNormal power-off1. Set the corresponding circuit breaker on the auxiliary power device for the RRU toOFF.lEmergency power-offCAUTIONEmergency power-off may damage the RRU. Therefore, this type of power-off is notrecommended in normal cases.1. Shut off the external input power of the auxiliary power device for the RRU.2. If time permits, set the corresponding circuit breaker on the auxiliary power devicefor the RRU to OFF.----EndRRU3201Hardware Maintenance Guide 3 Powering On and Off an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.7
4 Replacing an RRUA distributed base station consists of RRUs and a BBU. Replacing an RRU interrupts all theservices carried by the RRU, and alarms are generated.PrerequisitelThe test UE communicates with the base station properly.lThe types of faulty RRUs are confirmed as follows:–If RRUs can be queried online, run the DSP BRDMFRINFO command on the LMTto query the electronic labels of the RRUs.–If RRUs cannot be queried online, the information about the RRUs can be queried offlineon the M2000. For details, see the procedure for querying inventory data in the M2000documentation.lTools and materials, such as ESD gloves, M4 Phillips screwdrivers, M6 Phillipsscrewdrivers, waterproof tape, and PVC insulation tape, are ready.lThe number and type of RRUs to be replaced are confirmed, and new RRUs are ready.ProcedureStep 1 Run the BLK BRD command to block the RRU.Step 2 Power off the RRU by referring to 3.2 Powering Off an RRU.Step 3 Wear ESD gloves.CAUTIONlTake proper ESD protection measures, for example, wear ESD gloves, to prevent electrostaticdamage to the boards, modules, or electronic components.lPay attention to the high temperature while replacing an RRU without housing.Step 4 Loosen the six screws on the cover plate of the RRU cabling cavity using an M4 Phillipsscrewdriver, and then open the cover plate.Step 5 Record all the cable connections on the panel of the module to be replaced.RRU3201Hardware Maintenance Guide 4 Replacing an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.8
Step 6 Disconnect cables from the cabling cavity and bottom panel.Step 7 Loosen the captive screws on the two hoist clamps on the main mounting bracket using an M4Phillips screwdriver, as shown in Figure 4-1.NOTEIn scenarios where RRUs are installed in centralized mode, the RRU in the middle can be removed withoutremoving the two RRUs on its right and left sides, in the same procedure as that for removing a single RRU.Figure 4-1 Loosening captive screws on the main mounting bracket Step 8 Tighten the screws on the attachment plate of the RRU using an M6 Phillips screwdriver, asshown in Figure 4-2. Use the screw only for removing the RRU to loosen the connection betweenthe attachment plate and the main mounting bracket, and then support the RRU bottom to removeit, as shown in Figure 4-3.Figure 4-2 Tightening screws on the attachment plate RRU3201Hardware Maintenance Guide 4 Replacing an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.9
Figure 4-3 Supporting the RRU bottom CAUTIONWhen removing the RRU, hold the RRU handle with one hand and support the RRU bottomwith the other hand.Step 9 Tighten the captive screws on the two hoist clamps on the main mounting bracket to 1.4 N·m(12.39 lbf·in.). Install a new RRU and then waterproof the RRU.Step 10 Reconnect all required cables, and verify that vacant cable troughs in the cabling cavity areequipped by waterproof blocks.Step 11 Close the cover plate of the RRU cabling cavity, and then tighten the protection screw on thecover plate to 1.4 N·m (12.39 lbf·in.).Step 12 Power on the RRU by referring to 3.1 Powering On an RRU.Step 13 Check the operating status of the new RRU by observing the status of RRU indicators. For detailsabout the status of the indicators, see RRU Indicators.Step 14 Run the UBL BRD command to unblock the RRU.Step 15 Take off the ESD gloves, and pack up all the tools.----EndFollow-up ProcedurelPlace the removed RRU into the ESD box or bag. Then, place the ESD box or bag into afoam-padded carton or the packing box of the new RRU.lFill in the fault form with detailed information about the removed component.lContact the local Huawei office to handle the faulty component.RRU3201Hardware Maintenance Guide 4 Replacing an RRUIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.10
5 Replacing an Optical ModuleAn optical module implements optical-electrical conversion, enabling optical transmissionbetween an RRU and other devices. You must disconnect fiber optic cables from an opticalmodule before replacing the optical module. Disconnecting the fiber optic cables interrupts thetransmission of CPRI signals.PrerequisitelThe type and number of optical modules to be replaced are confirmed, and new opticalmodules are ready.lTools and materials, such as ESD gloves, M4 Phillips screwdrivers, and an ESD box orbag, are ready.ContextlOptical modules are inserted into CPRI_W and CPRI_E ports on an RRU.lOptical modules are hot-swappable when the same CPRI ports are used.lIt takes about five minutes to replace an optical module on the RRU, which involvesdisconnecting fiber optic cables, removing the faulty optical module, inserting a new opticalmodule, reconnecting the fiber optic cables, and waiting for CPRI links to resume.ProcedureStep 1 Wear ESD gloves.CAUTIONTake proper ESD protection measures, for example, wear ESD gloves, to prevent electrostaticdamage to the boards, modules, or electronic components.Step 2 Loosen the six screws on the cover plate of the RRU cabling cavity using an M4 Phillipsscrewdriver, and then open the cover plate.Step 3 Record the connections of the optical module and fiber optic cables.Step 4 Press the latch on the fiber optic cable connector, and then remove the connector from the faultyoptical module.RRU3201Hardware Maintenance Guide 5 Replacing an Optical ModuleIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.11
WARNINGDo not look into the fiber optic cable or optical module without eye protection after the fiberoptic cable is removed from the optical module.Step 5 Lower the puller on the faulty optical module, and then pull the puller until the optical moduleis removed from the RRU.Step 6 Choose the optical module of the same type as the faulty optical module according to the labelon the module. Install a new optical module into the RRU.NOTEThe optical modules to be installed must match CPRI rates.Step 7 Insert the fiber optic cable connector into the new optical module.Step 8 Check the transmission of CPRI signals by observing the status of CPRI_W and CPRI_Eindicators. For details about the status of the indicators, see RRU Indicators.Step 9 Reconnect the cables in the cabling cavity.Step 10 Close the cover plate of the RRU cabling cavity, and then tighten the protection screw on thecover plate to 1.4 N·m (12.39 lbf·in.).Step 11 Take off the ESD gloves, and pack up all the tools.----EndFollow-up ProcedurelPlace the removed optical module into the ESD box or bag. Then, place the ESD box orbag into a foam-padded carton or the packing box of the new module.lFill in the fault form with detailed information about the removed component.lContact the local Huawei office to handle the faulty optical module.RRU3201Hardware Maintenance Guide 5 Replacing an Optical ModuleIssue 04 (2011-09-15) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.12

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