Whether the sound and lighting of the stage is normal or not directly affects the effect of the performance, so both professional audio equipment and stage lighting equipment need to be well maintained and maintained, and the lines and equipment that have problems should be repaired in time to avoid unexpected situations. .
The inspection sequence of the shell of the audio and lighting equipment is electrified
The order of the live inspection of the equipment shell is to first check whether the power supply line is damaged, secondly, whether the line phase is correct, and then to know whether the equipment grounding and voltage are correct.
How to check for resonance and feedback in the sound field
If resonance and acoustic feedback occur in professional audio equipment, first check whether there is a peak in the frequency response of the room, and also check whether the structure and decoration of the room are reasonable, and it is best to check whether the crossover point and bass gain are reasonable. , whether the room reverberation time is too long.
Inspection method for generating disturbing noise
If there is noise in the professional audio equipment, firstly check the dimming interference, whether the audio and lighting power supply is disconnected, and secondly check whether the lighting power supply and control line are too close to the audio signal line, and whether there is any silicon box separation. A situation where the audio device is too close.
Under normal circumstances, there is noise in the speaker system, which is usually caused by unreasonable signal transmission. Therefore, when there is a problem with the shielding of the signal line, or the grounding of the signal is incorrect, it is easy to cause noise interference. Condition.
The order of checking the volume of the professional audio system is insufficient
Under normal circumstances, if the volume of professional audio equipment is insufficient, it is necessary to promptly check whether the line level settings of the power amplifier and the speaker are correct, and secondly, it is necessary to know whether the speaker line is firmly connected, and whether the phase of the power amplifier and the speaker is consistent. , is the attenuation range of the equalizer in the normal range? Is the start control level of the compressor appropriate?
How to check for out-of-control lights
If the light is out of control, first check whether there is any problem with the program of the controller, whether there is a problem with the address code of the lamp, whether the connection of the control line is correct, and whether the shielding of the control line is disturbed or not, and the limit of the lamp. Whether the adjustment is appropriate, etc.
Check for damage to the computer light bulb
The most likely thing in stage audio lighting is that the bulb is easily damaged, so if there is a problem, it is necessary to check whether the installed bulb is reliable, whether it is contaminated with dust and moisture, and whether the heat dissipation of the bulb is in the normal range. It is best to check whether the voltage is within the normal range and whether the power switch is used too frequently.
The sound of wireless microphones in professional audio equipment is unstable:
If the wireless microphone is unstable, first check the reason for the unstable sound, whether it is caused by a high-frequency interference source in the system, or is there a problem with the connected equipment such as antenna connection error, receiver fine-tuning, microphone battery power, etc. caused.
Inspection of video images in audio and video systems
If the video image is abnormal in the professional audio equipment, firstly, you need to check whether the program format is in the correct range, whether the equipment shell is live, and secondly, check whether the signal shielding is susceptible to high-level interference. , it is best to check whether the projection tube is within the normal range, and whether there is any problem with the performance of the LCD projection bulb.