一、 查看是否是音响线缆连接出现故障引起的杂音
1、 Check whether the noise is caused by the failure of the audio cable connection
检查一遍所有的接线是否有松动，或者虚焊，要排查这一步以确保以后能正确判断故障原因。
Check whether all wiring is loose or faulty. First, check this step to ensure that the cause of the fault can be correctly determined in the future.
二、 查看是否是会议音箱的问题引起的杂音
2、 Check whether the noise is caused by the problem of the conference speaker
1、 判断是那只喇叭单元有坏了的方法
1. How to judge which horn unit is broken
找到是否是喇叭单元坏了，很简单，只需要在功放机的前面板上进行调节，就可以找到是哪只喇叭单元有问题了。，把左右平衡打到一边，了解是哪只音箱有问题，而后，再把高音关死，看看是否低音有问题，如无问题，则开启低音，把高音关死，听听高音是否有问题。另一只音箱采用同样的方法试试。
It is easy to find out whether the speaker unit is broken. Just adjust the front panel of the amplifier to find out which speaker unit is faulty. First, turn the left and right balance to one side to find out which speaker has a problem, then turn off the treble to see if there is a problem with the bass. If there is no problem, turn on the bass, turn off the treble, and listen to whether there is a problem with the treble. Try the same method for the other speaker.
2、 判断是不是会议音箱分频器出现问题
2. Determine whether there is a problem with the frequency divider of the conference speaker
要判断分频器是否有问题很简单，我们确定了喇叭单元，如果没有发现，或者发现喇叭单元有问题，但是已经换了好的单元，仍然有杂音，那就换个好的分频器试下就可以了。
To determine whether there is a problem with the frequency divider, we first determine the speaker unit. If there is no problem with the speaker unit, or if there is a problem with the speaker unit, but the unit has been replaced and there is still noise, then we can replace it with a good frequency divider and try it.
三、 查看是否是会议功放老化所造成的杂音
3、 Check whether the noise is caused by the aging of conference power amplifier
查看功放机是否老化了，简单的办法是，旋转音乐、话筒的大旋钮看是否会加强杂音的出现，或者是一会有声音，一会又没有声音。判定是功放机的问题，那就只能换功放了，或返回厂里维修。
The simple way to check whether the amplifier is aging is to rotate the big knob of the music and microphone to see if it will enhance the appearance of noise, or if there is sound at one time and no sound at the other. If the problem is judged to be the power amplifier, the power amplifier can only be replaced or returned to the factory for maintenance.
四、 检查是不是音源本身有问题
4、 Check if there is a problem with the audio source itself
音乐或话筒本身有问题引起杂音也非常常见，如是音乐本身可以用手机播放一下就可以判断，如果是就要重新下载无损音乐;如果是话筒可以用别的话筒测试就可以判断出来。
It is also very common for music or microphone itself to cause noise. For example, music itself can be judged by playing it on a mobile phone. If it is, it is necessary to download lossless music again; If the microphone can be tested with other microphones, it can be determined.
