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Professional analysis of stage lighting and audio equipment failure
- Jan 25, 2019 -

The normality of the stage sound and light directly affects the performance of the performance, so both professional audio equipment and stage lighting equipment need to be maintained and maintained, and the faulty lines and equipment should be repaired in time to avoid accidents.


1, 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.


2. An 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. The 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.


3. How to check the resonance and acoustic 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.


4, the professional sound system in the case of the insufficient volume check sequence

Under normal circumstances, if there is an insufficient volume in the professional audio equipment, it is necessary to check whether the line level setting of the amplifier and the speaker is correct, and then understand whether the speaker cable connection is firm, and whether the phase of the amplifier and the speaker are consistent. Whether the amplitude of the equalizer attenuation is within the normal range, and whether the starting level of the compressor is appropriate.


5, 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, and secondly, whether the line phase is correct, and whether the grounding and voltage of the equipment are correct.