The power plug of one or several of the connected audio equipment is not plugged in properly. Solution: check the power terminal block to make the socket contact well.

 

（2）: the sound reinforcement system sometimes makes a "click" sound, especially in the process of playing music, this phenomenon constantly occurs.

 

(1) There is faulty welding in the connecting line between the equipment of the sound reinforcement system. When there is a music signal, the solution is to make the sound signal intermittently by using the false solder joint:

 

(2) It is necessary to thoroughly check the wiring of each channel equipment, and it is better to re weld each connection point;

 

1. The connecting shield wire of each channel equipment has poor contact or faulty welding. Solution: carefully check the shield wire between each equipment and try to use welding.

2. The equipment with three pin power plug is connected to the socket with two-wire input, and the two-stage live wire is inversely connected with the neutral wire. Solution: the two-wire input socket must be reversed, and the neutral wire and the live wire must be reversed. Generally, the left foot of the socket is neutral wire and the right foot is live wire. The power plug-in board shall be equipped with three pins, and the pins above the middle part shall be grounded to ensure the safety of power consumption.

 

 

（4）: when the sound system and the light system are running at the same time, the AC noise of the sound system is very loud. When the light system is turned off, the sound system cannot hear the AC sound. The sound system and the light system share the same single-phase electricity. The thyristor of the lighting system has a large working current and is of the AC pulse type. It is directly coupled to the input end of the expansion equipment through the power lead, so as to generate a large AC sound solution:

 

(2) The power supply of sound system adopts isolation transformer, and the power of isolation transformer shall be higher than that of sound system;

（5）: in the process of sound reinforcement, a group of speakers or two groups of speakers at the left and right channel entrances are suddenly silent;

 

 

1. The left and right channels of the sound source enter the mixing platform, and the audio-visual adjusting buttons on the corresponding channels are placed disorderly, resulting in audio-visual confusion. Solutions: correct the adjustment of the audio-visual adjusting buttons on the corresponding channels, so that the output signals of the mixing platform retain the audio-visual images of the original sound source;

（7）: the effect processing of singing sound has not been added

1. The singing sound does not enter the effect machine. Solution: turn on the corresponding auxiliary knob on the singing sound channel, turn on the auxiliary knob sent by the auxiliary bus, and observe the input signal indicator of the effect machine to see if there is any input signal.

 

 

 

 

 

 

2. Solution to open circuit or short circuit of connecting wires between equipment: carefully check the connection condition of equipment wiring, plug and socket, and eliminate faulty welding, desoldering and short circuit.

 

 

Solution: check the microphone cable, connect the microphone switch or replace the microphone.

（11）: hold the stage wired microphone, slightly swing, and the loudspeaker makes a "click" sound.