RRU3908 V2 V100R003 Hardware Maintenance Guide Issue 01 Date 2010-04-10 Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
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RRU3908 V2 Hardware Maintenance Guide Contents Contents About This Document.....................................................................................................................1 1 Changes in the RRU3908 V2 Hardware Maintenance Guide............................................1-1 2 Maintenance Items for the RRU..............................................................................................2-1 3 Powering On and Powering Off the RRU...............................................
RRU3908 V2 Hardware Maintenance Guide Figures Figures Figure 4-1 Loosening the captive screws on the main bracket............................................................................4-2 Figure 4-2 Tightening the screws on the adapting piece......................................................................................4-2 Figure 4-3 Lifting the bottom of the RRU...........................................................................................................
RRU3908 V2 Hardware Maintenance Guide Tables Tables Table 2-1 Maintenance items for the RRU...........................................................................................................2-1 Issue 01 (2010-04-10) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3908 V2 Hardware Maintenance Guide About This Document About This Document Purpose This document describes the routine maintenance items for the RRU3908 hardware, such as equipment maintenance and power-on and power-off operations. It also describes the procedures for replacing components and modules. Product Version The following table lists the product version related to this document.
RRU3908 V2 Hardware Maintenance Guide About This Document This describes how to power on and power off the RRU. When powering on the RRU, you should check the power supply voltage of the RRU and the status of the LEDs on the RRU. When powering off the RRU, you can perform normal power-off or emergency power-off operation based on field requirements. 4 Replacing the RRU The RRU, a remote radio unit, forms a distributed BTS with the BBU.
RRU3908 V2 Hardware Maintenance Guide About This Document Command Conventions The command conventions that may be found in this document are defined as follows. Convention Description Boldface 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 by vertical bars. One item is selected. [ x | y | ...
RRU3908 V2 Hardware Maintenance Guide About This Document Mouse Operations The mouse operations that may be found in this document are defined as follows. 4 Action Description Click Select and release the primary mouse button 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.
RRU3908 V2 Hardware Maintenance Guide 1 1 Changes in the RRU3908 V2 Hardware Maintenance Guide Changes in the RRU3908 V2 Hardware Maintenance Guide This chapter describes the changes in the RRU3908 V2 Hardware Maintenance Guide. 01(2010-04-10) This is the draft release. Issue 01 (2010-04-10) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
RRU3908 V2 Hardware Maintenance Guide 2 Maintenance Items for the RRU 2 Maintenance Items for the RRU The maintenance items for the RRU are equipment surface, equipment cleanliness, and LEDs. Table 2-1 describes the maintenance items for the RRU.
RRU3908 V2 Hardware Maintenance Guide 3 3 Powering On and Powering Off the RRU Powering On and Powering Off the RRU About This Chapter This describes how to power on and power off the RRU. When powering on the RRU, you should check the power supply voltage of the RRU and the status of the LEDs on the RRU. When powering off the RRU, you can perform normal power-off or emergency power-off operation based on field requirements. 3.
RRU3908 V2 Hardware Maintenance Guide 3 Powering On and Powering Off the RRU 3.1 Powering On the RRU You need to power on the RRU and check the running status of the RRU according to the status of the LEDs. Prerequisite l The hardware and cables of the RRU are installed. l If DC power is used, the input voltage ranges from -36 V DC to -57 V DC. l If AC power is used, the input voltage ranges from 100 V AC to 240 V AC. Context CAUTION The RRU must be powered on within 24 hours after being unpacked.
RRU3908 V2 Hardware Maintenance Guide 3 Powering On and Powering Off the RRU 3.2 Powering Off the RRU This describes how to power off the RRU and check the RRU status. The RRU power-off is classified into normal power-off and emergency power-off. Procedure Step 1 Choose normal power-off or emergency power-off based on different situations. If... Then... The RRU needs to be powered off in the case of an equipment swap or a foreseeable regional blackout Go to Step 2 to perform the normal poweroff.
RRU3908 V2 Hardware Maintenance Guide 4 Replacing the RRU 4 Replacing the RRU The RRU, a remote radio unit, forms a distributed BTS with the BBU. Prerequisite l The tools and materials, such as an ESD wrist strap, M4 screwdriver, M6 screwdriver, wrench, waterproof tape, and insulating tape are ready. l The quantity of faulty RRUs are confirmed, and new RRUs are ready. Procedure Step 1 Power off the RRU. For details, see 3.2 Powering Off the RRU.
RRU3908 V2 Hardware Maintenance Guide 4 Replacing the RRU Figure 4-1 Loosening the captive screws on the main bracket Step 7 Use an M6 screwdriver to tighten the screw on the adapting piece of the RRU, as shown in Figure 4-2. Using the screw only for removing the RRU, loosen the connection between the adapting piece and the main bracket, and then lift the bottom of the RRU to remove the RRU, as shown in Figure 4-3.
RRU3908 V2 Hardware Maintenance Guide 4 Replacing the RRU Figure 4-3 Lifting the bottom of the RRU Step 8 Tighten the captive screws on the two contact pieces of the main bracket until the tightening torque reaches 1.4 N·m. Step 9 Install a new RRU, and then waterproof the RRU. Step 10 Insert all the cables to be connected to the RRU, and then check that the idle cables trough in the cabling cavity are fitted with waterproof fillers.
RRU3908 V2 Hardware Maintenance Guide 5 Replacing the Optical Module 5 Replacing the Optical Module The optical module implements optical-electrical conversion, thus enabling optical transmission between the RRU and other devices. You need to remove the optical cable before replacing the optical module. Replacing the optical cable disrupts the transmission of CPRI signals. Prerequisite l The types and quantity of faulty optical modules are confirmed, and new optical modules are ready.
RRU3908 V2 Hardware Maintenance Guide 5 Replacing the Optical Module WARNING Do not look into the optical fiber with unprotected eyes after the optical cable is removed from the optical fiber. Step 5 Turn the puller of the optical module outwards, and then pull the puller until the optical module is removed from the RRU. Step 6 Install the new optical module onto the RRU. Step 7 Insert the optical connector into the new optical module.
