Huawei RRU3804 User Manual page 46

4 Maintaining the Hardware of the RRU
Prerequisite
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Context
The optical module is installed on the CPRI_W or CPRI_E port of the RRU.
The optical module is hot swappable.
It takes about five minutes to replace the optical module of the RRU. The time covers the
activities of disconnecting the optical cable, removing the faulty optical module, inserting the
new optical module, connecting the optical cable to the new optical module, and waiting for the
recovering of the CPRI links.
Take proper ESD prevention measures, for example, wearing an ESD wrist strap or a pair of
ESD gloves, to prevent electrostatic hazard to the board, module, or electrical parts.
Procedure
Step 1 Press the latch on the faulty optical cable connector, and then remove the connector from the
faulty optical module.
Step 2 Turn the puller on the faulty optical module outwards. Then, hold the puller and take the faulty
optical module out of the port to remove the module from the RRU.
Step 3 Install the new optical module to the RRU.
Step 4 Remove the dustproof caps from the new optical module and optical cable connector in turn.
Then, insert the connector into the new optical module.
Step 5 Determine whether the transmission of the CPRI signals is normal according to the status of the
LEDs on the CPRI_W and CPRI_E ports. For detailed description of the LEDs, refer to
LEDs on the
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Postrequisite
Contact the local Huawei office to handle the faulty optical module.
4-6
The quantity of the optical modules to be replaced are checked, and new optical modules
are ready.
The tools and materials are ready. The tools and materials are the ESD wrist strap or gloves
and ESD box or bag.
CAUTION
RRU3804.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
RRU3804
User Guide
3.1.3
Issue 08 (2009-06-30)