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Parts replacement is a critical maintenance task. To ensure your safety and device safety, read carefully the following safety precautions before performing the operation.
Mechanical Operation Safety
When replacing parts (for example, the fan tray), do not put your fingers or any tools into the rotating fan.
While replacing a part, do not apply excessive force, or pull out or insert a board forcibly. This may damage the equipment or the pins on the backplane, thereby causing short-circuit.
Device Running Safety
Complete the fan tray replacement within 5 minutes. Otherwise, the stable running of related services will be severely affected.
Service Running Safety
To avoid unexpected events, replace boards at the time (for example, 2:00 a.m) when the traffic is light in non-emergency cases.
ESD Measures
To guarantee board safety, employ dedicated ESD bags and boxes when transporting or storing boards.
Wear a well-grounded ESD wrist strap when holding, removing or inserting boards, and insert the ground end to the ESD jack of the shelf, as shown in Figure 1.
Figure 1 Wearing the ESD wrist strap
Unpacking Boards
Electronic circuit is vulnerable to the ESD. When handling a board, wear the ESD wrist strap that is properly grounded and touch only the edge of the board.
Boards are put into ESD bags in transportation. Before unpacking boards, take ESD measures. Moreover, note the effect caused by the ambient temperature and humidity. Generally, an ESD bag contains desiccant to absorb the moisture inside the bag. When a board is moved from a cold and dry place to a hot and damp place, wait at least 30 minutes before unpacking the board. Otherwise, the moisture condensed on the board surface may damage the board.
To unpack boards, do as follows:
1.Check the bag of each board for any damages.
2.Wear an ESD wrist strap and ground it properly.
3.Open each bag and check the board inside it for any damages.
Parent Topic: Overview