At present, there are many kinds of professional audio equipment, so many
equipments will inevitably have some kinds of failures in use, some are the
failures of the equipment itself (hard failures), and some are artificial
failures (soft failures) caused by improper use. Generally speaking, the failure
of the audio system can be classified into five categories: power failure, line
failure, human operation failure, equipment failure, and interference failure.
Our main components today are power failures, line failures and human operation
failures!
Audio system power failure
(1) System power failure
The overall power configuration of the audio system is very important. The
following points need to be paid attention to:
1. Three-phase power
Generally, places where professional audio equipment is used will apply for
the installation of three-phase power supplies. More important places will also
use two independent three-phase power supplies. If one of them fails, the entire
system will not be paralyzed; even very important The venue will also use a
backup power supply like a "UPS" for a computer, which shows how important the
power supply is.
2. Separate audio and lighting power
It is best for the audio system and lighting to have their own power
supplies, otherwise one is prone to interference, and the other is not safe to
work.
3. Total power distribution
It is not enough to have a strong power supply, but also pay attention to
the distribution of the power supply: in principle, the mixer and various audio
source equipment should have an independent power supply; various peripheral
devices should have an independent power supply; power amplifiers and other
equipment should have at least one independent power supply. 2 independent power
supplies. Each independent power supply is controlled by the corresponding air
switch, so it is very convenient for us to switch the equipment.
(2) Equipment sub-power failure
The power failure of the device itself can also be divided into 3
parts:
1. The circuit part of the device itself is faulty
This cannot be ruled out by our general audio engineer, and professional
maintenance personnel or equipment suppliers are required for warranty.
2. There is a problem with the power supply to the device
For example, some DC-powered devices need to use transformers, and
sometimes the transformers will fail; there is also a problem with the power
cord connecting the device, which rarely happens, but there are really good
power cords that seem to be fine, but they are not powered on. , and replace the
power cord when the fault is eliminated.
3. There is a problem with the device of the plug-in equipment
For example, there is a problem with the socket connected to the device,
the power sequencer, etc., the probability of such a failure is relatively high,
especially when it comes to mobile performances.
(3) Failure of power supply voltage regulator and plug-in equipment
Nowadays, the power consumption of all walks of life is increasing, so it
is difficult to ensure that the voltage of the power supply is within a constant
standard range. In this case, many places where audio is used have equipped the
audio system with power processing equipment such as voltage regulators.
However, when selecting equipment, we must pay attention to the voltage
stabilized power and quality of the voltage stabilizer; in some places, the
quality of the power socket or power sequencer used is relatively poor, which is
also prone to failure.
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