Jiangyin Yuanfang Machinery Manufacture Co., Ltd , https://www.yuanfangmachine.com
Safe use of public address system has a trick
With the continuous development of high technology, the functions of the public address system are becoming more and more complete. How can it be used safely when the public address system is used? Here are some tips.
(1) Pay attention to the operating conditions of the machine, especially the following matters:
Avoid using the machine in extremely low or high temperature environments, and avoid direct sunlight on the surface of the machine.
Avoid using the machine in a humid environment to avoid premature failure of the components in the machine or premature rusting of the machine.
Before using it, make sure that the local power supply voltage is in accordance with the unit.
(2) Pay attention to the use environment of the machine:
Avoid using the machine in dusty and vibrating environments.
There should be enough space around the machine to facilitate heat dissipation of the machine.
For power amplifiers, special care should be taken to keep the cooling channels clear.
(3) Points to note when using the machine:
In the process of use, attention should be paid to the sequence of starting up and shutting down. When turning on the power, you should first turn on the front-end equipment such as the audio source, and then turn on the power amplifier; when turning off, you should turn off the power amplifier first, and then turn off the front-end equipment such as the audio source. If the audio equipment has a volume knob, turn the volume knob to the minimum before turning it on and off. The purpose of this is to alleviate the impact on the speaker when it is turned on and off.
It is strictly forbidden to pull out and insert the signal plug with power on. In order to avoid damage to the machine or sound box caused by the electric shock.
If an abnormality occurs during the operation of the machine, the power supply should be immediately turned off and stopped. If the operator does not understand the maintenance technology, do not open the machine without authorization, so as not to cause greater damage to the machine or cause an electric shock.
(4) Pay attention to the maintenance of the machine:
Do not use volatile solutions to clean the machine. For example, wipe the surface of the machine with gasoline, alcohol, etc., and use a soft cloth to wipe the dust. Also, unplug the power supply when cleaning the casing of the machine.
The machine is generally not waterproof. In case of wet water, the machine can be turned on only after the water is completely dry.
Do not place heavy objects on the machine to avoid deformation of the machine.
(5) Safe use of the machine:
Do not pull or plug in the power plug with wet hands to avoid electric shock.
When not using for a long time, please unplug the power plug from the power socket.
Do not let metal conductive materials such as iron needles, hairpins, coins, etc. fall into the machine to avoid damage to the machine.
When replacing the fuse of the machine, it should be replaced strictly according to the requirements, and it is strictly prohibited to use substitutes that do not meet the requirements.
When the machine is in use, the chassis ground point should be safely grounded.
The machine is strictly forbidden to work under overload or short circuit.
There are auxiliary power sockets on the back panel of the power amplifier. Do not use it to connect electric appliances such as hair dryers and electric irons. It can only be used to connect audio equipment.
In a constant voltage power amplifier, the output terminal will have a higher output voltage, and the output lead is generally longer, so in use, we must ensure the safety and reliability of the output lead.
(6) Pay attention to the protection of the power cord:
Pay attention to avoid being stepped on by the power cord and being crushed by heavy objects.
Never pull, plug, or twist the power cord.
When pulling out the plug from the socket, grasp the plug to pull it out.