山东公共广播音响系统在使用的时候难免会出现大大小小的问题，这个时候我们就要及时寻找原因然后抓紧时间解决掉，不然小问题也得拖延成为大问题，下面小编给您讲解常见问题。
It is inevitable that Shandong public address sound system will have large and small problems when it is used. At this time, we should find out the reasons in time and solve them as soon as possible. Otherwise, small problems will also become big problems. The following sections will explain common problems to you.
线性输入信号源
Linear input signal source
检查方法：
Inspection method:
将前置放大器或者调音台的线路输入信号源，如电脑、顿痴顿、调谐器等，依次拔掉然后检查噪音是否消失，然后判断噪音是哪路信号源引入系统的；一般线性输入信号源引入噪音可能较少，有的话一般是电脑或者调谐器造成的。
Input the line of the preamplifier or the mixer into the signal source, such as the computer, DVD, tuner, etc., unplug them in turn, check whether the noise disappears, and then determine which signal source the noise is introduced into the system; Generally, the noise introduced by linear input signal source may be less, and sometimes it is generally caused by computer or tuner.
解决方案：
Solution:
将电脑的电源与前置功放取到同一个插座，或者更换其它电脑或者笔记本测试，一般是电脑和前置放大器之间有电位差导致的噪音，中间接音频隔离器有可能会有所好转。或者将电脑和前置放大器等公用一个电源，或将电脑电源地线去掉。
Take the power supply of the computer and the preamplifier to the same socket, or replace another computer or laptop for testing. Generally, there is a noise caused by potential difference between the computer and the preamplifier, and the intermediate audio isolator may be improved. Or the computer and preamplifier can share a power supply, or the computer power ground wire can be removed.
调谐器引入噪音一般是调谐器电源打开了，而且接收信号不好造成噪音出现，将调谐器电源关闭即可，如要使用调谐器根据效果可增加室外天线解决接收信号弱的问题。
In general, the tuner power is turned on to introduce noise, and the noise is caused by poor reception signal. Turn off the tuner power. If you want to use the tuner, you can add an outdoor antenna according to the effect to solve the problem of weak reception signal.
话筒输入信号源
Microphone input signal source
检查方法：
Inspection method:
将话筒信号输入线依次拔掉，如有线话筒或者无线话筒等；然后检查音箱是否还有噪音，判断噪音是哪一路话筒引入系统的；
Unplug the microphone signal input line in turn, such as wired microphone or wireless microphone; Then check whether there is any noise in the speaker, and determine which microphone is introduced into the system;
解决方案：
Solution:
无线话筒引入，有可能是无线话筒的使用频段有干扰造成噪音，如果无线话筒能够调整频率的话，调整频率测试；
The introduction of wireless microphone may be caused by interference in the frequency band of wireless microphone. If the wireless microphone can adjust the frequency, adjust the frequency test;
也可能是接收机接地不好造成的噪音，如果接收机固定到机柜了也有可能造成噪音，将接收机从机柜拆下，与机柜隔离测试检查噪音是否消失。如果消失的话，将接收机垫纸或者泡沫，放到其他设备或者托盘上。
It may also be the noise caused by poor grounding of the receiver. If the receiver is fixed to the cabinet, it may also cause noise. Remove the receiver from the cabinet and test whether the noise disappears after isolation from the cabinet. If it disappears, put the receiver pad paper or foam on other equipment or tray.
有线话筒引入，一般是有线话筒线过长（四五十米及以上）引起的，更换短话筒线测试，长有线话筒线引入的噪音一般不好处理，长话筒线铺设的时候一般要求使用质量好的搁痴痴笔（两芯带屏蔽）线缆，在话筒线与前置放大器之间增加音频隔离器有可能会有帮助。
The introduction of wired microphone is generally caused by the long wired microphone cable (40 to 50 meters and above). Replace the short microphone cable for testing. The noise introduced by the long wired microphone cable is generally difficult to deal with. When laying the long microphone cable, it is generally required to use the RVVP (two core tape shield) cable with good quality. It may be helpful to add an audio isolator between the microphone cable and the preamplifier.
功放或者前置放大器
Power amplifier or preamplifier
检查方法：
Inspection method:
在不接入音源的情况下，也就是说前置放大器没有任何输入信号源，前置放大器与功放之间只有一根信号线，
When the sound source is not connected, that is to say, the preamplifier does not have any input signal source, and there is only one signal line between the preamplifier and the power amplifier,
如果还有噪音，将线拔掉，检查音箱是否还有噪音。
If there is still noise, unplug the cable and check whether there is still noise in the speaker.
解决方案：
Solution:
如果噪音消失，那问题出在前置放大器上，如果有其他的前置放大器代替测试一下，发回前置放大器维修或者更换备用机。
If the noise disappears, the problem lies in the preamplifier. If another preamplifier replaces the test, send it back to the preamplifier for maintenance or replacement.
如果还有噪音，那问题出在功放上，如果有其他功放代替测试，有问题功放发回公司维修或者更换备用机。
If there is still noise, the problem is the power amplifier. If there is another power amplifier to replace the test, the faulty power amplifier will be sent back to the company for maintenance or replacement.
公共广播系统常见问题之音箱有噪音的相关事项就讲解到这里了，如果您对此有什么不了解的，欢迎来我们网站
进行咨询了解！
This is the end of the FAQ of the public address system. If you don't know anything about it, please come to our website Ask about it!
