1, the stage sound lighting equipment shell has a charging phenomenon inspection sequence The order of the electrical inspection of the equipment casing is first to check whether the power supply line is damaged, secondly, whether the line phase is correct, and secondly, whether the equipment grounding and voltage are correct. 2, how to check the 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 room frequency response, and also check whether the room structure and decoration are reasonable. It is best to check whether the crossover point and bass gain are reasonable. Whether the room reverberation time is too long. 3. Inspection method for generating interference noise If there is noise in the professional audio equipment, first check the dimming interference, whether the audio and lighting power supply is disconnected, and then check whether the lighting power supply and control circuit are too close to the audio signal line, and there is no silicon box. Audio device is too close Under normal circumstances, there is noise in the speaker system, which is usually caused by the unreasonable transmission of the signal. Therefore, when there is a problem with the shielding of the signal line, or the grounding of the signal is not correct, noise interference is likely to occur. Happening. 4, the professional sound system in the case of insufficient volume check sequence Under normal circumstances, if there is insufficient volume in the professional audio equipment, it is necessary to check whether the line level setting of the power amplifier and the speaker is correct, and then understand whether the speaker cable connection is firm, and whether the phase of the power amplifier and the speaker are consistent. Whether the equalizer attenuation amplitude is in the normal range, and whether the voltage regulator's starting level is appropriate. 5, the inspection method of the light out of control When the light is out of control, it is necessary to check whether the controller's program has any problems. Is there any 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 needs to be checked for bad interference, and the limit of the lamp. Whether the adjustment is appropriate, etc. 6, computer light bulb damage check The most prone to the stage sound is the light bulb is easy to break, so if there is a problem, it is necessary to check whether the installed light bulb is reliable, whether it is contaminated with dust and moisture, and whether it is to check whether the heat dissipation of the light bulb is in the normal range. Inside, it is best to check whether the voltage is within the normal range and whether the power switch is used too frequently. 7, the sound of the wireless microphone in professional audio equipment is unstable If the wireless microphone is unstable, first check the cause of the unstable sound, which is caused by high frequency interference sources in the system, or the connection error of the antenna, the fine adjustment of the receiver, the battery power of the microphone, etc. of. 8. Inspection of video images in audio and video systems If the video image is not normal in the professional audio equipment, first check whether the program format is in the correct range, whether the device casing is charged or not, and secondly check whether the signal shielding is susceptible to high level interference. It is best to check if the projection tube is in the normal range, and there is no problem with the performance of the liquid crystal projection bulb.
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