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Summary of Contents for Huawei RRU
- Page 1 Hardware Maintenance Guide Issue Date 2015-03-23 HUAWEI TECHNOLOGIES CO., LTD.
- Page 2 Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not 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"...
- Page 3 Purpose This document describes routine maintenance procedures for an RRU such as equipment maintenance and power-on and power-off operations. It also explains how to replace the RRU and optical modules. The RRUs involved in this document are the RRUs in SingleRAN, GSM, UMTS, LTE FDD, and LTE TDD modes.
- Page 4 3 Powering On and Off an RRU 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 emergent power-off procedure as required.
- Page 5 [ x | y | ... ] * Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected. Issue 16 (2015-03-23) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
- Page 6 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. Issue 16 (2015-03-23) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
- Page 7 4.1 Preparations Before Replacement ..........................13 4.2 Replacing an RRU Using Assembled Mounting Kits ....................15 4.2.1 Replacing an RRU Using a Mounting Kit for a Common RRU ................15 4.2.2 Replacing an RRU Using a Mounting Kit for a Blade RRU ................... 20 4.3 Replacing an RRU Using Non-assembled Mounting Kits ..................
- Page 8 1 Changes in RRU Hardware Maintenance Guide Changes in RRU Hardware Maintenance Guide This chapter describes the changes in RRU Hardware Maintenance Guide. 16 (2015-03-23) This is the sixteenth commercial release. Compared with issue 15 (2015-02-10), this issue does not include any new information.
- Page 9 Hardware Maintenance Guide 1 Changes in RRU Hardware Maintenance Guide Compared with issue 14 (2015-01-30), no information is deleted from this issue. 14 (2015-01-30) This is the fourteenth commercial release. Compared with issue 13 (2014-11-10), this issue does not include any new information.
- Page 10 Hardware Maintenance Guide 1 Changes in RRU Hardware Maintenance Guide Compared with issue 10 (2014-01-20), this issue does not include any new information. Compared with issue 10 (2014-01-20), this issue includes the following change: Topic Change Description 4.5 Replacing Blade RRUs in the ICR and...
- Page 11 Hardware Maintenance Guide 1 Changes in RRU Hardware Maintenance Guide 4.1 Preparations Before Replacement 4.4 Replacing a Non-Blade RRU with a Blade RRU 4.6 Operations After Replacement 6 Adding RRUs Compared with issue 07 (2013-05-30), this issue includes the following changes:...
- Page 12 This is the fifth commercial release. Compared with issue 04 (2012-09-15), this issue includes the following new information: 4.2.2 Replacing an RRU Using a Mounting Kit for a Blade RRU Compared with issue 04 (2012-09-15), this issue includes the following changes: Topic Change Description 3.1 Powering On an RRU...
- Page 13 Compared with issue 01 (2011-11-30), no information is deleted from this issue. 01 (2011-11-30) This is the first commercial release. This release incorporates the following documents to RRU Hardware Maintenance Guide. RRU3201 Hardware Maintenance Guide ...
- Page 14 Hardware Maintenance Guide 1 Changes in RRU Hardware Maintenance Guide RRU3805 Hardware Maintenance Guide RRU3808 Hardware Maintenance Guide RRU3828 Hardware Maintenance Guide RRU3928 Hardware Maintenance Guide RRU3929 Hardware Maintenance Guide Issue 16 (2015-03-23) Huawei Proprietary and Confidential...
- Page 15 2 Preventative Maintenance Items for an RRU Preventative Maintenance Items for an Preventative maintenance improves the reliability of the RRU. You are advised to perform scheduled maintenance yearly. When working at heights, the maintenance personnel need to exercise caution to avoid falling of objects, which may cause injuries or death.
- Page 16 Hardware Maintenance Guide 2 Preventative Maintenance Items for an RRU Item All CPRI optical fibers are free from wear, cuts, cracks, or other damage. All screws are tightened on the cover plate of the maintenance cavity. All RET cables (optional) are free from wear, cuts, cracks, or other damage.
- Page 17 The input voltage of an AC RRU ranges from 100 V AC to 240 V AC. Context After unpacking an RRU, you must power on it within 24 hours. If you power off the RRU for maintenance, you must restore power to the RRU within 24 hours.
- Page 18 Do not look into the optical module without eye protection after the RRU is powered on. Step 2 Wait 3 to 5 minutes, and then check the status of the indicators on the RRU. For details, see section "RRU Indicators" in the hardware description of the corresponding RRU.
- Page 19 Shut off the external input power of the power equipment for the RRU. If time permits, on the power equipment for the RRU, set the corresponding circuit breaker to OFF or remove the corresponding EPC connector.
- Page 20 This chapter describes the procedures and precautions for replacing a common RRU, replacing a blade RRU, and replacing a non-blade RRU with a blade RRU by reusing mounting kits. Replacing an RRU interrupts all the services carried by the RRU and causes alarms.
- Page 21 Step 1 Optional: If a functional RRU is to be replaced, disable its maximum output power locking for TX channels before storing it in the spare parts inventory. If a faulty RRU is to be replaced, its maximum output power locking does not need to be disabled. Then, go to Step ...
- Page 22 On the UMTS side, log in to the LMT and run the BLK BRD command to block the RRU. On the LTE side, log in to the LMT and run the BLK BRD command to block the RRU. On the GSM side, log in to the BSC LMT and run the SET GTRXADMSTAT command with the parameter ADMSTAT set to LOCK to block the carriers of the RRU.
- Page 23 4 Replacing an RRU This section describes the procedure for replacing an RRU by reusing a mounting kit. For how to replace an RRU by using a new mounting kit, see a related RRU installation guide. RRUs are in the same type after the replacement but their attachment plates may be different.
- Page 24 Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or other electronic components. Step 2 Use an M4 Phillips screwdriver to loosen the screws on the cover plate of the RRU cabling cavity. Then open the cover plate.
- Page 25 Figure 4-4 Loosening captive screws on the main bracket (2) Step 6 Optional: When attachment plate A for a common RRU is used, use an M6 Phillips screwdriver to loosen the screw only for removing the RRU on the attachment plate to loosen...
- Page 26 Step 8 Use an M4 torque screwdriver to tighten the captive screws on the two hoist clamps of the main bracket to 1.4 N· m (12.39 lbf· in.). Step 9 When an RRU attachment plate matches its mounting kit, install a new RRU by referring to a related RRU installation guide.
- Page 27 Step 11 Close the cover plate of the RRU cabling cavity. Then use an M4 torque screwdriver to tighten the screws on the cover plate of the RRU cabling cavity.
- Page 28 Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Use an M5 Phillips screwdriver to loosen the screws on the cover plate of the RRU cabling cavity. Then open the cover plate.
- Page 29 Figure 4-10 Removing the metal sheet from an RRU installed in centralized mode If an RRU is installed in centralized mode, the RRU can be removed without removing the two RRUs on its right and left sides. The procedure is the same as that for removing a single RRU.
- Page 30 Step 9 Close the cover plate of the RRU cabling cavity. Then use an M5 torque screwdriver to tighten the screws on the cover plate of the RRU cabling cavity.
- Page 31 Step 4 Remove all cables in the RRU cabling cavity and at the RRU bottom in the sequence of power cables first and ground cables at last. Step 5 Use an M6 hex screwdriver to loosen the captive screw on the holes on the top of the RRU conversion bracket and main bracket, as shown in...
- Page 32 Figure 4-14 Loosening screws on the conversion bracket (blade RRU) Figure 4-15 Loosening screws on the conversion bracket (non-blade RRU) Step 6 Hold the RRU upwards to remove it from the attachment plate, as shown in Figure 4-16 the blade RRU and Figure 4-17 for the non-blade RRU.
- Page 33 Step 7 Dispose of the removed RRU module properly. Step 8 Install the new RRU and connect required cables by seeing the related RRU installation guide. Ensure that vacant cable troughs in the cabling cavity are equipped by waterproof blocks and RF cables are waterproofed.
- Page 34 Hardware Maintenance Guide 4 Replacing an RRU 4.4 Replacing a Non-Blade RRU with a Blade RRU This section describes the procedure and precautions for replacing a non-blade RRU with a blade RRU. Prerequisites The operations in 4.1 Preparations Before Replacement have been performed.
- Page 35 This section describes the procedure for replacing an RRU by reusing a mounting kit. For how to replace an RRU by using a new mounting kit, see a related RRU installation guide. After the replacement, an attachment plate for a blade RRU can be installed together...
- Page 36 − (Recommended) Method 1: Reuse the conversion bracket. Remove conversion brackets of the faulty RRU and blade RRU and install the conversion bracket of the faulty RRU on the side of the blade RRU, as shown in Figure 4-19. Figure 4-19 Reusing the conversion bracket...
- Page 37 Hardware Maintenance Guide 4 Replacing an RRU Figure 4-20 Installing the blade RRU on the general RRU main bracket (conversion bracket reused) − Method 2: The conversion bracket is not reused. Directly install the blade RRU on the general RRU main bracket, as shown in Figure 4-21.
- Page 38 The following figure shows how to replace the RRU on the right. Figure 4-22 Installing board RRUs (replacing RRUs at two sides) Step 4 Install all cables for the blade RRU by referring to the section "Installing RRU Cables" in a related RRU installation guide.
- Page 39 Before the replacement, ports for the alarm cables of a common RRU are positioned in the RRU cabling cavity. After the replacement, ports for the alarm cables of a blade RRU are positioned at the bottom of the RRU, and the ports need to be waterproofed.
- Page 40 (ICR) with blade RRUs and adding blade RRUs to the ICR. Context This document applies to 12 L blade RRU. The 18 L blade RRU does not support the indoor centralized installation. The attachment plates for installing a blade RRU in an ICR must support RRU installation in a subrack.
- Page 41 Figure 4-25 Loosing the upper and lower installation plates Pull the RRU to be replaced out of the ICR. Step 3 Install the mounting brackets for the blade RRU. Remove the attachment plate from the rear of the RRU, as shown in Figure 4-26.
- Page 42 RRU in an ICR out of the packing case. Install the upper attachment plate on the upper part of the RRU, and use an M6 torque screwdriver to tighten the screws on the attachment plate to 5 N· m (44.25 lbf· in.), as...
- Page 43 Step 4 Turn the RRU with upper and lower attachment plates upside down, insert the RRU into the correct slot in an ICR, and tighten the four M6 screws on the RRU to 5 N· m (44.25 lbf· in.), as...
- Page 44 Hardware Maintenance Guide 4 Replacing an RRU Figure 4-30 Installing the RRU in an ICR Step 5 Optional: Install the other two RRUs by referring to Step 3 Step 4. An ICR can house a maximum of three RRUs. Figure 4-31 shows an ICR housing three RRUs.
- Page 45 For details about cable connections, see the blade RRU installation guide. Cables can be reused according to onsite requirements. Step 7 Close the cover plate of the RRU cabling cavity, and use an M5 torque screwdriver to tighten the screws on the cover plate to 2 N· m (17.7 lbf· in.).
- Page 46 Step 5 Take off the ESD gloves, and pack up all the tools. Step 6 Place the removed RRU into the ESD box or bag. Then, place the ESD box or bag into a foam-padded carton or the packing box of the new RRU.
- Page 47 Replacing an Optical Module An optical module implements optical-electrical conversion, enabling optical transmission between an RRU and other devices. You must disconnect optical fibers from an optical module before replacing the optical module. Disconnecting the optical fibers interrupts the transmission of CPRI signals.
- Page 48 3.2 Powering Off an RRU. Step 3 Loosen the screws on the cover plate of the RRU cabling cavity using an M4 Phillips screwdriver, and then open the cover plate. Step 4 Record the connections of the optical module and optical fibers.
- Page 49 The optical modules to be installed must match CPRI rates. Step 8 Insert the optical fiber connector into the new optical module. Step 9 Close the cabling cavity of the RRU and use an M4 Phillips screwdriver to tighten the screws on the cover plate for the cabling cavity.
- Page 50 The hoist clamp of the main bracket is secured properly. Do not stand the RRU upright because the RF ports cannot support the weight of the RRU. Place a foam pad or cardboard under the RRU to protect the RRU housing from damage during the installation.
- Page 51 RRU Using a Mounting Kit for a Common RRU. Remove the attachment plate at the rear of the RRU and install it on one side of the RRU. Then install the RRU by referring to the section "Installing Three or More RRUs"in a related RRU installation guide.
- Page 52 Hardware Maintenance Guide 6 Adding RRUs Step 3 Install the main bracket for a blade RRU on the main bracket of the mounting kit for a common RRU, as shown in Figure 6-3. The auxiliary bracket in the following figure is only for reference. The actual auxiliary bracket may be different.
- Page 53 RRU, as shown in Figure 6-5. The opening ends of U-shaped slots on both sides of the main bracket for a blade RRU face downwards. Issue 16 (2015-03-23) Huawei Proprietary and Confidential...
- Page 54 Figure 6-5 Installing the third RRU on the third main bracket Step 6 Install the second RRU mounting kit at a position of at least 480 mm (18.90 in.) away from the top or bottom of the first RRU mounting kit, as shown in Figure 6-6.
- Page 55 Figure 6-7 Installing a blade RRU on the fourth main bracket Step 8 Install blade RRUs on both sides of the blade RRU according to the instructions in the section "Installing Three or More RRUs" in a related blade RRU installation guide.
- Page 56 Use an M6 Phillips screwdriver to slightly loosen the screw on the metal sheet closer to handle of the first RRU and move the metal sheet out. Then align the holes in the metal sheet with the holes at the top of the second RRU.
- Page 57 Step 12 Check the operating status of the new RRU by observing the status of RRU indicators. When the RRU is working properly, the RUN indicator is blinking (on for 1s and off for 1s), and the ALM indicator is steady off.