At present, some domestic equipment has relatively more equipment failures. The following is a brief introduction to the common failures of professional audio equipment: 1. The common faults of the mixer: 1. The volume fader is not in good contact, and the sound is intermittent during work. 2. The channel input port is faulty. For example, the XLR XLR input port of the old-fashioned Budweiser mixer is very easy to "uproot". When I started to encounter such a fault, I couldn't believe my eyes. 3. The control system is disordered. I used a 16-channel sound mixer once and found that there was no signal from the total output. Later, I changed to the group output. When the next group had no signal output, I was pushing the 10th channel. When fader, it is indeed the sound of the 11th channel. Later, I output signals through AUX and so on, and finally the mixer went on strike completely. At this time, the performance is not cold, and I simply gave the CD signal directly to the amplifier to make some music. For the first time in many years, a mixer like this has failed, and I have never heard of it before. In short, the failure of the mixer is nothing more than the input part, output part, control part, power supply part, etc., which is generally caused by the aging of the equipment. Second, the common faults of the equalizer: 1. Equalizer push-pull key contact failure, this is the most common, mainly due to equipment aging and harsh environment. 2. The internal circuit of the equalizer is faulty. I have seen that some equalizers have only one signal output. Later, I found that the one circuit is broken, and there are not many such equalizers. I have encountered them several times. Third, common self-failures such as compressors, electronic crossovers, professional feedback suppressors, professional delays, etc .: In addition to the severe aging of the equipment, these devices generally do not have major problems, at most the adjustment knob and the rear panel signal The socket is a little problem. Four, common faults of digital effect device: 1. Noise problem, the digital effect device itself has certain digital noise when processing audio signals. If the signal line is not well shielded, the noise will be like rain when it is serious. 2. The core part of the digital effect device is the digital processing chip. When these digital chips have malfunctions, I have seen a Yamaha500 effect device that can be turned on but cannot work. All the programs in it cannot be adjusted and used. Complex digital chips cannot be repaired at all. 5. Common failures of amplifiers and speakers: 1. The most common failure of the power amplifier is a bad capacitor or a power amplifier tube. This has the problem of our use, but most of them are still unstable. 2. Another one, I also found that some amplifiers will have a channel without sound failure, the problem is still a circuit problem inside. 3. As for other faults, what other power amplifier volume potentiometers are not in good contact, the left and right channels are unbalanced, the protection function is too frequent, the rear panel work switch is not in good contact, and the signal jack is a problem. In short, the power amplifier is now compared in the audio system. An electrical device that is prone to failure. 4. The most common part of the speaker failure is of course the speaker problem. It can be said that the most likely failure in a sound system is to burn the speaker. This is of course an artificial factor, but most of them are quality problems of the speaker itself. 5. Another common failure of the speaker is the aging of the wiring port and poor contact, especially the speaker that flows frequently is prone to this kind of failure. The above equipment itself is faulty. The general sound engineer cannot repair it. In the previous article, I said that the sound engineer should be "professional." If the power amplifier is broken or the speaker is broken, those are the maintenance engineers. We The scope of work of the sound engineer is to match the sound system and adjust all kinds of sounds.
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