Inspection sequence of electrified enclosure of audio and lighting equipment
The order of live inspection of equipment shell is to check whether the power supply line is damaged, then whether the line phase is correct, and then whether the equipment grounding and voltage are correct.
How to check resonance and feedback in the sound field
If there is resonance and acoustic feedback in professional audio equipment, first check whether the room frequency response has a peak point, and whether the room structure and decoration are reasonable. It is best to check whether the frequency division point and bass gain are reasonable, and whether the room reverberation time is too long.
Inspection method for generating interference noise
If there is noise in professional audio equipment, first check the dimming interference and whether the audio and light power supply are disconnected. Secondly, check whether the light power supply and control line are too close to the audio signal line and whether the silicon box is too close to the audio equipment.
Generally, the noise in the speaker system is usually caused by the unreasonable signal transmission. Therefore, when the shielding of the signal line is faulty or the signal grounding is incorrect, the noise interference is easy to occur.
Inspection sequence for insufficient volume of professional sound system
Generally, if the volume is insufficient in professional audio equipment, it is necessary to timely check whether the line level setting of power amplifier and speaker is correct. Secondly, it is also necessary to understand whether the speaker line connection is firm, whether the phase of power amplifier and speaker is consistent, and whether the attenuation amplitude of equalizer is in the normal range? Is the starting control level of the voltage limiter appropriate?
Inspection method of out of control light
If the light is out of control, first check whether there is a problem with the program of the controller, whether there is a problem with the address code of the lamp, whether the connection method of the control line is correct, whether the shielding of the control line is subject to adverse interference, and whether the limit adjustment of the lamp is appropriate.
Computer lamp bulb damage inspection
In the stage sound and lighting, the most likely thing is that the bulb is easy to break. Therefore, in case of problems, it is necessary to check whether the installed bulb is reliable and whether it is contaminated with dust and moisture. In addition, it is also necessary to check whether the heat dissipation of the bulb is within 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 cause of the sound instability, whether it is caused by high-frequency interference sources in the system, or problems with connecting equipment such as antenna connection error, receiver fine-tuning, microphone battery power, etc.
Inspection of video image in audio and video system
If the video image is abnormal in professional audio equipment, first of all, it is necessary to check whether the program system is in the correct range and whether the equipment shell is charged. Secondly, it is also necessary to check whether the signal shielding is vulnerable to high-level interference. It is best to check whether the projection tube is in the normal range and whether there is a problem with the performance of the liquid crystal projection bulb. Stage lighting and sound equipment
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