Huawei TP48200A-D17B3 Troubleshooting Manual page 9

TP48200A-D17B3
Troubleshooting Guide
High Electrical Leakage
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Power Cable
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Fuse
Electrostatic Discharge
The static electricity generated by human bodies may damage the electrostatic-sensitive
components on boards, for example, the large-scale integrated (LSI) circuits.
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Figure 1-1 shows how to wear an ESD wrist strap.
Issue 03 (2013-05-06)
Ground the device before powering it on. Otherwise, personal injury or device damage
may be caused by high leakage current.
If a "high electrical leakage" tag is present on the power terminal of the device, you must
ground the device before powering it on.
Do not install or remove power cables when the device is on. Transient contact between
the core of the power cable and the conductor may generate electric arcs or sparks, which
may cause fire or hurt human eyes.
Before installing or removing the power cable, turn off the power switch.
Before connecting a power cable, verify that the label on the power cable is correct.
To ensure that the system runs safely, if a fuse is to be replaced, the new fuse must be of
the same type and specifications.
Human body movement, friction between human bodies and clothes, friction between
shoes and floors, or handling of plastic articles causes static electromagnetic fields on
human bodies. These static electromagnetic fields cannot be eliminated until the static is
discharged.
To prevent electrostatic-sensitive components from being damaged by the static on
human bodies, you must wear a well-grounded ESD wrist strap when touching the
device or handling boards or application-specific integrated circuits (ASICs).
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1 Safety Precautions
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