Huawei DBS3900 Installation Manual page 115

1 Safety
Figure 1-2 Wearing an ESD wrist strap
1.2.3 Installing and Removing a Board
When installing a board, use proper force to prevent the pins on the backplane from being
leaned.
When installing or removing a board, note the following:
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1.2.4 Laying Cables
When the temperature is very low, violent strike or vibration may damage the cable sheathing.
To ensure safety, comply with the following requirements:
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1-10
Insert the board along the guide rails.
Prevent the surface of a board from contacting the surface of another board. This is to
prevent the boards from being short-circuited or scratched.
To prevent electrostatic-sensitive devices from being damaged by the ESD, do not touch
the circuits, components, connectors, or connection slots on boards.
Cables can be laid or installed only when the temperature is higher than 0℃.
Before laying cables which have been stored in a temperature lower than 0℃, move the
cables to an environment of the ambient temperature and store them at the ambient
temperature for at least 24 hours.
Handle cables with caution, especially at a low temperature. Do not drop the cables
directly from the vehicle.
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