Cleaning And Maintenance - Huawei B681-54 Quick Start Manual

Power adapter safety
The power plug is intended to serve as a disconnect device.

For pluggable devices, the socket-outlet shall be installed near the devices and

shall be easily accessible.
Unplug the power adapter from electrical outlets and the device when not in

use.
Do not drop or cause an impact to the power adapter. If it is damaged, take it to

an authorized service center for inspection.
If the power cable is damaged (for example, the cord is exposed or broken), or

the plug loosens, stop using it at once. Continued use may lead to electric
shocks, short circuits, or fire.
Do not touch the power cord with wet hands or pull the power cord to

disconnect the power adapter.
Do not touch the device or the power adapter with wet hands. Doing so may

lead to short circuits, malfunctions, or electric shocks.
If your power adapter has been exposed to water, other liquids, or excessive

moisture, take it to an authorized service center for inspection.
Ensure that the power adapter meets the requirements of Clause 2.5 in

UL60950-1 and has been tested and approved according to national or local
standards.

Cleaning and maintenance

During storage, transportation, and operation of the device, keep it dry and

protect it from collision.
Keep the device and accessories dry. Do not attempt to dry it with an external

heat source, such as a microwave oven or hair dryer.
Do not expose your device or accessories to extreme heat or cold. These

environments may interfere with proper function and may lead to fire or
explosion.
Avoid collision, which may lead to device malfunctions, overheating, fire, or

explosion.
If the device is not going to be used for an extended period of time, power it off,

and remove all cables connected to it.
If anything unusual occurs (for example, if the device emits smoke or any

unusual sound or smell), immediately stop using it, power it off, remove all
cables connected to it, and contact an authorized service center.
Do not trample, pull, or excessively bend any cable. Doing so may damage the

cable, causing the device to malfunction.
Before you clean or maintain the device, stop using it, stop all applications, and

disconnect all cables connected to it.
Do not use any chemical detergent, powder, or other chemical agents (such as

alcohol and benzene) to clean the device or accessories. These substances
may cause damage to parts or present a fire hazard. Use a clean, soft, and dry
cloth to clean the device and accessories.
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