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5 Replacing the Optical Module
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.
Step 8 According to the status of the LEDs on the CPRI0 and CPRI1 ports, determine whether the CPRI
links resume. For details about the LEDs, see RRU Indicators.
Step 9 Reinstall the DB15 connector on the alarm cable, close the cover plate for the cabling cavity of
the RRU, and then tighten the protection screw on the cover plate for the cabling cavity of the
RRU until the tightening torque reaches 1.4 N·m.
Step 10 Take off the ESD wrist strap or gloves, and then pack up all the tools.
----End
Postrequisite
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5-2
WARNING
Place the replaced optical module into the ESD box or bag. Then, place the ESD box or
bag into a carton padded with foam or into the packing box of the new module.
Fill in the fault form with the details of the replaced component.
Contact the local Huawei office to handle the faulty optical module.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
RRU3908 V2
Hardware Maintenance Guide
Issue 01 (2010-04-10)
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