】 【Weak current College (go) expert detailed professional audio troubleshooting tips (1).

Current professional audio equipment, upgrading is changing, so many devices in use which inevitably there are all sorts of trouble, some are on the device itself, and some of our audio division caused by improper use of the fault of the person, so we talk about the article: "professional sound system troubleshooting methods", I said failure is defined as "soft" fault, is designed for system operation in terms of failures, rarely involve real fault on the device itself, those considered "hard". I have always advocated the "professional", say what power amplifier is broken, Horn bad those are maintenance engineers, our sound engineer's job is to match a good sound system, the various sounds good, doesn't have to be jacks-of-all-trades! lift audio fault is really very painful because various fault really, very difficult in an article that clearly, I can only based on my years with various audio experience to fault of the article written in a simple pop up, I analyzed, generally sound kinds of system failure can be summarized as: total power failure, line failure, human operation breakdown, equipment failure, failure in itself, a total of five interference. The following is an analysis of a serve everyone, and this article explain also explains some troubleshooting audio, so we understand the cases it is even more simple and thorough.

A power failure, sound system

(A), total system power failure: in a previous article I made a sound system overall power profile is important to note the following points: 1, three-phase power: general use professional audio equipment for facilities will apply for the installation of three-phase power supply, the more important place also uses two separate three-phase power supply, just in case one fails so the whole system is down; even very important sites also use similar to PC "UPS" standby power, visible power is so important. 2, audio, lighting and power supply separately: this point in the previous article also told many times, sound system and lights it is best to have its own power, otherwise one is prone to interference, then a work is not secure. 3. total power distribution: light has a strong power is not enough, we must pay attention to the power of distribution: in principle, a mixer and a variety of audio sources equipment to have all the independent power; various peripheral equipment you want to have all the independent power; power amplifier and other equipment you need at least 2-channel independent power supply. Each one independent power supply with the corresponding air switch control, so we're switching equipment is very convenient.

(Ii), the device to a power failure: device itself power failures can also be divided into three parts: 1, device internal circuitry itself fails, the US General audio engineer can't exclude that need professional service personnel or equipment supplier to warranty. 2, power supply equipment, such as some DC-powered device to use a transformer, the transformer will fail sometimes; there is the power cord connected device has a problem, this situation rarely occurs, but also really good power line seems no problem is not powered on, and a power cable fault elimination. 3. patch equipment installations, such as device connected socket, power, timing, etc., the failure rate is very high in relative terms, especially in mobile performance to pay more attention.

(Iii), the power supply voltage, patch equipment failure: now better economic development, energy consumption is increasing, so the power supply voltage is very difficult to guarantee a constant standard, in this case many places using audio to hi-fi system is configured with a regulator, power equipment, but in the selection of devices it is important to note that regulator voltage power and quality; there are places with a power outlet or power source time series for quality rather poor, but also prone to failure. Power system failure case: 1, opened a new ballroom, the days debugging when voltage normal sound system, the system is working properly, but the evening performances, let alone the voltage low to 180 v, also some audio equipment is not working properly. I found this site using a three-phase power, sound system, a phase of lighting system and air conditioning system with a phase, other places a lighting system. When debugging a sound during the day in the ballroom of the lighting and air-conditioning are not open, therefore, power good, night, three-phase power imbalance issues came. Later, the air conditioning system is also a phase alone, the workplace lighting system using civilian electrical system, this three-phase power balance, you have resolved the problem. 2, a dance performance speakers are always issued "lol" the sound of impact, the results I found the quality of voltage regulator is not too good, whenever the regulator regulator pointer runout time speaker on "lol", and then replace the transformer, I found that sometimes there will be a power pulse sound, the results are found when pressing stage camera console, the sound is noise, then put the controller's power simply plug into civil electrical outlet, and ordinary mixer that road total power apart you have resolved the problem. The above example, we know the power failure is caused by a variety of, must rely on our careful installation, configuration and use, so the power part very critical and important.