1. The device housing has a charging phenomenon check sequence
The equipment casing is charged - the power supply line is damaged - the 
line phase is correct - the equipment is grounded correctly - the voltage is 
correct
2, the sound system is not enough volume
Insufficient device volume - Is the line level setting of the amplifier and 
the speaker correct Is the speaker cable connected firmly Is the phase of 
the amplifier and the speaker consistent Is the equalizer attenuation 
amplitude appropriate Is the control level of the compressor limited
3. Resonance and feedback occur in the sound field
Resonance and Acoustic Feedback - Check if there is a peak in the room 
frequency response - Is the room structure and decoration reasonable Is the 
crossover point and bass gain reasonable Is the room reverberation time too 
long
4, generate interference noise
The sound system has noise - dimming interference - whether the sound and 
lighting power supply are separate - whether the lighting power supply and 
control lines are too close to the audio signal line - whether the silicon 
box is too close to the audio equipment
The speaker system is noisy—is the signal transmitted properly—whether 
the shielding of all signal lines is appropriate—whether the signal is 
grounded correctly—the power phases of all audio devices are consistent
5, the light is out of control
The light is out of control - the controller's program is correct - the 
address code of the luminaire is correct - the control line is connected 
correctly - the shielding of the control line is bad or interfered - whether 
the limit adjustment of the luminaire is appropriate - the light supply 
switch is in good contact
6, the lamp of the computer light is often damaged (750 hours)
The bulb is fragile—whether the installation is secure or not, whether 
it is contaminated with dust and moisture—whether the bulb is well cooled— 
whether the voltage is normal—whether the power switch is frequent
7, the video image is not normal
Video image is not normal - whether the program format is correct - 
whether the device casing is charged - whether the signal shielding is 
affected by high level - whether the projection tube is normal - whether the 
performance of the liquid crystal projection lamp is poor
8, the wireless microphone sound is unstable
Unstable sound—whether there is a high-frequency interference source in 
the system—is the antenna connection correct—is the receiver fine-tuned 
correct—the number of microphones is excessive—the microphone battery is 
low.