Solve the fatal and daily faults in KTV sound system

Sound no sound ▼▼▼
(Exclusion method, calmly and quickly deal with problems, can not solve timely assistance)
Check that each device is powered on properly and is turned on.
Each power supply is turned on normally without sound. First, use the microphone to test whether there is sound. For example, the microphone test has sound, there is no music accompaniment, focus on detecting the song system; the microphone has no sound, then use the song system to test whether there is sound, and the song system has sound. , focus on detecting the microphone; if there is no sound, check whether the volume switch of each device is in the normal position, then check whether the connection of each cable is correct, whether there is damage, the position of each volume switch is correct, the connection is intact; check the pre-effects intact; check Amplifier.
The karaoke system starts normally and runs without sound, mostly line faults, followed by input and output faults (this is rare); the karaoke system card map has no sound, check whether the network signal light is flashing after the set-top box, flashing the set-top box crashes, mostly overheating Deadlock, restart can solve the problem temporarily, then do a good job of cooling, input no signal, check whether the port is plugged in, the line is damaged, and finally check whether the machine room switch works normally, whether the host works normally, multiple boxes simultaneously appear the same fault In time, check whether the equipment exchange is working normally, and whether the host is working normally; if the boot cannot start the song system, the method is the same as above.
The microphone has no sound (wireless), check whether the microphone has power and turn on, talk to see if the receiver has a sound signal display, no signal display checks whether the microphone frequency grouping and the receiver correspond, does not correspond to first confirm whether to take the wrong microphone, not take the wrong Microphone, proofreading frequency can be; speak to see the receiver has a sound signal display, indicating output failure, check whether the volume switch is in the correct position, the connection line is correct; still can not solve the problem, try a good set of microphones.
The pre-effects cause no sound failure. First look at the output, see if the amplifier has a signal, the amplifier has no signal, check whether the volume switch and the internal software volume are calibrated in place; the amplifier has no signal, check whether the line is connected incorrectly or damaged. , still can not be ruled out, focus on troubleshooting speakers.
The amplifier causes no sound failure, no sound at startup, check if the volume potentiometer is in the correct position, whether the signal light is flashing, whether the relay has closed sound, no closure, repeat the test, can not solve the change of the test; close no sound Output, check the speaker first, and then make a decision.
No sound caused by the speaker, when the power amplifier leads to a short circuit at a certain frequency divider, it can be successfully protected and has no sound. In other cases, the speaker is completely burnt out or the frequency divider is faulty. The simplest detection method is to remove the power amplifier. Connect the speaker cable, take a battery with a dry battery, rub the positive and negative poles of the wire and the positive and negative poles of the battery, listen to the speaker whether there is sound, the high and low sounds have a sound, indicating that the speaker is temporarily no problem; the speaker has no sound, First check the line plug, the line is normal, you can directly test the quality of the speaker at both ends of the speaker with the battery. If the speaker is good, then you should consider the problem of the crossover. Of course, the chances of all the speakers are small, two The probability that the speaker's crossover is bad at the same time is also very small. It is just taken out and analyzed, not too serious.
Common faults daily fault handling ▼▼▼
(cool, quick, decisive, good at communication)
Howling, this is a situation that often occurs in general places, the quality of equipment, the quality of the decoration environment, in short, the situation of howling can be avoided, no matter how bad the equipment, the environment is too bad, the voice control of the job is to try to adjust To the best, don't say so much nonsense. The mentality of the sound control should be positive, so that it can be clearly judged. Do not let your mood change, because of equipment, environment, and others, to bring about a vicious circle.
Closer to home, dealing with howling relies on the accumulation of ordinary experience, you need to personally experience all kinds of howling and solutions. Most of the situations are when the two microphones are too close to the speakers. This kind of situation can only be avoided. Don't be too serious; there are also cases where the equipment is limited in use, the music sound is too loud, the microphone volume is turned up, causing howling, and the accompaniment can be used to highlight the vocals. It is moderate. Here you need to be good at communication, communication can be easily solved. problem.
The effect is not good - this is a phrase that guests often say, the guest said is very general, this requires you to ask clearly and then solve the problem, to develop a habit of communication.
There are several basic situations: the volume of the music accompaniment is too large or too small, the microphone sound is too small, the reverberation is too large or too small, and the serious point is that the device is not adjusted or the sound is not good, and the solution is the most important. The rule is to calmly judge, simply solve, and don't make things complicated.
The daily fault handling should be good at cultivating assistants to help you solve some simple problems, prohibiting guests or non-authorized personnel from mobilizing important equipment.
Familiarity with the performance and health of the equipment is an important rule to solve problems better and faster, and to develop the habit of making written records.

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