Huawei SmartAX MA5612 Maintenance Manual page 27

SmartAX MA5612 Multi-service Access Module
Maintenance Guide
Parts
Optical transceiver
Cable
Precautions for Replacing Boards
Storage and transportation of boards
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Insertion and removal of boards
Do not remove or insert the power connector or power board when they are still connected to
the power supply.
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Issue 01 (2012-07-25)
When a board is outside the shelf (chassis), carry and place the board carefully. Take ESD
measures to protect the board. Place the board horizontally. Keep the side with firm parts
facing downward. Do not place any objects on the horizontal surface of the board.
Do not place a board in an environment of humidity or direct sunlight. Make sure that the
environment where the board is temporarily stored is suitable for storage.
When transporting multiple boards, if only the ESD bag is used as the protection material,
do not stack the boards together for transportation. Perform operations on only one board
at a time.
DANGER
Take ESD measures before the replacement.
Insert or remove only one board at a time. Do not insert or remove multiple boards at the
same time.
When inserting or removing a board, make sure that the board is not connected to any
external cables.
When connecting or disconnecting optical fibers on the front panel of a board to be replaced,
do not look directly at the optical port without wearing protective glasses. The laser emitted
from the optical port can injure your eyes.
Do not touch the surface of the printed circuit board (PCB).
Select the screwdriver of a proper type. Using the screwdriver of an unmatched type can
damage the grooves on the head of the screws.
Prevent short circuit caused by any metallic object, such as tools that are placed improperly
or screws that fall into the shelf accidentally.
When inserting or removing a board, prevent any collision to the parts on the board, and
make sure that you do not pull the surrounding cables by accident.
Strictly follow the regulations when using tools to insert or remove a board. Otherwise, the
board may be damaged.
When removing a board, after the board is separated from the backplane, wait for several
seconds and then remove the board carefully. This protects the other boards from the
electricity discharge of the removed board.
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Impact on Services
Services carried on the optical port are interrupted.
Services carried on the cable are interrupted.
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