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3

Powering On and Off an RRU

About This Chapter

After an RRU is powered on, check the status of RRU indicators and voltage. Before the RRU
is powered off, follow the normal power-off or emergency power-off procedure as required.

3.1 Powering On an RRU

Set the corresponding circuit breaker on the auxiliary power device for the RRU to ON, and
check the operating status of the RRU by observing the status of RRU indicators.

3.2 Powering Off an RRU

An RRU can be powered off in two ways: normal power-off and emergency power-off. You
must power off an RRU in a normal situation such as moving the equipment or anticipating a
territorial blackout. You must also power off an RRU in an emergency such as a fire, smoke, or
water immersion occurs in the equipment room.

RRU3203
Hardware Maintenance Guide

3 Powering On and Off an RRU

Issue 04 (2011-09-15)

Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

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Summary of Contents for RRU3203

Page 1: ...RRU3203 Hardware Maintenance Guide Issue 04 Date 2011 09 15 HUAWEI TECHNOLOGIES CO LTD ...

Page 2: ...be within the purchase 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 representations of any kind either express or implied The information in this document is subject to change without notice Every effort has been made in the preparation of this document to ensu...

Page 3: ...S3900 LTE V100R003C00 and later versions Intended Audience This document is intended for l System engineers l Site maintenance engineers Organization 1 Changes in the RRU3203 Hardware Maintenance Guide This chapter describes the changes in the RRU3203 Hardware Maintenance Guide 2 Preventative Maintenance Items for an RRU Preventative maintenance for an RRU improves the reliability of the RRU You a...

Page 4: ... which if not avoided will result in death or serious injury Indicates a hazard with a medium or low level of risk which if not avoided could result in minor or moderate injury Indicates a potentially hazardous situation which if not avoided could result in equipment damage data loss performance degradation or unexpected results Indicates a tip that may help you solve a problem or save time Provid...

Page 5: ...ems or no item can be selected GUI Conventions The GUI conventions that may be found in this document are defined as follows Convention Description Boldface Buttons menus parameters tabs window and dialog titles are in boldface For example click OK Multi level menus are in boldface and separated by the signs For example choose File Create Folder Keyboard Operations The keyboard operations that may...

Page 6: ...without moving the pointer Double click Press the primary mouse button twice continuously and quickly without moving the pointer Drag Press and hold the primary mouse button and move the pointer to a certain position RRU3203 Hardware Maintenance Guide About This Document Issue 04 2011 09 15 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd v ...

Page 7: ...intenance Items for an RRU 3 3 Powering On and Off an RRU 5 3 1 Powering On an RRU 6 3 2 Powering Off an RRU 6 4 Replacing an RRU 8 5 Replacing an Optical Module 11 RRU3203 Hardware Maintenance Guide Contents Issue 04 2011 09 15 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd vi ...

Page 8: ...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 Description 4 Replacing an RRU Added the commands for querying electronic labels of boards online ...

Page 9: ...ith draft A 2010 12 15 this issue incorporates the following change Topic Change Description 4 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 V100R002...

Page 10: ...ion 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 condi...

Page 11: ...ollowing corrective actions 1 Tighten all connections 2 Report any other faults found when filling in the checklist to the supervisor because only technically qualified and trained field engineers are permitted to climb towers for further repairs RRU3203 Hardware Maintenance Guide 2 Preventative Maintenance Items for an RRU Issue 04 2011 09 15 Huawei Proprietary and Confidential Copyright Huawei T...

Page 12: ...ng status of the RRU by observing the status of RRU indicators 3 2 Powering Off an RRU An RRU can be powered off in two ways normal power off and emergency power off You must power off an RRU in a normal situation such as moving the equipment or anticipating a territorial blackout You must also power off an RRU in an emergency such as a fire smoke or water immersion occurs in the equipment room RR...

Page 13: ...er on the RRU DANGER Do 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 For details 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...

Page 14: ...ower off CAUTION Emergency power off may damage the RRU Therefore this type of power off is not recommended 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 device for the RRU to OFF End RRU3203 Hardware Maintenance Guide 3 Powering On and Off an RRU Issue 04 2011 09 15 Huawe...

Page 15: ...waterproof tape and PVC insulation tape are ready l The number and type of RRUs to be replaced are confirmed and new RRUs are ready Procedure Step 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 CAUTION l Take proper ESD protection measures for example wear ESD gloves to prevent electrostatic damage to the boards mo...

Page 16: ...r 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 as shown in Figure 4 2 Use the screw only for removing the RRU to loosen the connection between the attachment plate and the main mounting bracket and then support the RRU bottom to remove it as shown in Figure 4 3 Fi...

Page 17: ...2 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 details about 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 End Follow up Procedure l Place the removed RRU into the ESD box or bag The...

Page 18: ...ve minutes to replace an optical module on the RRU which involves disconnecting fiber optic cables removing the faulty optical module inserting a new optical module reconnecting the fiber optic cables and waiting for CPRI links to resume Procedure Step 1 Wear ESD gloves CAUTION Take proper ESD protection measures for example wear ESD gloves to prevent electrostatic damage to the boards modules or ...

Page 19: ... status of CPRI_W and CPRI_E indicators 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 the cover plate to 1 4 N m 12 39 lbf in Step 11 Take off the ESD gloves and pack up all the tools End Follow up Procedure l Place the removed optic...

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