How can I check myself when the sound breaks down?

Release time:

2022-07-23

Summary： Take a wired microphone and insert it into the M1C (microphone) input port of the combined power amplifier, turn on the power supply of the power amplifier, turn on the front input control button of the microphone and turn it to the 12 o'clock position, and turn the output volume button of the microphone to the 12 o'clock position. Turn on the microphone switch to shout. If the microphone is silent, insert the microphone in-line into the other two microphone input ports for testing. If all input ports are still silent after testing, the power amplifier may have a fault. You can contact the technical engineer of the factory by phone to consult the treatment method. Without electronic technical support, you should write down the fault status of the power amplifier on a small piece of paper and stick the small piece of paper on the power amplifier, packed and returned to the factory for maintenance.

1. sound music silent

1. Insert one wired microphone into the M1C (microphone) input port of the combined power amplifier, turn on the power supply of the power amplifier, turn on the front input control button of the microphone and turn it to the 12 o'clock position, and turn the output volume button of the microphone to the 12 o'clock position. Turn on the microphone switch to shout. If the microphone is silent, insert the microphone in-line into the other two microphone input ports for testing. If all input ports are still silent after testing, the power amplifier may have a fault. You can contact the technical engineer of the factory by phone to consult the treatment method. Without electronic technical support, you should write down the fault status of the power amplifier on a small piece of paper and stick the small piece of paper on the power amplifier, packed and returned to the factory for maintenance. Shijiazhuang Professional Audio

2. If the microphone is audible and the music is silent according to the above method, check whether the input of the sound source (VOD) is correct and whether the input wire is intact and reasonably connected to the tapping and playback machine. If the wire is intact and connected correctly, but the music is still silent, check whether the music input port selection on the front panel of the power amplifier is consistent with the audio input port, re-select the input port to have music (if the wire is output from VOD and connected to the "CD" input of the power amplifier, but the "VOD" port is selected on the front panel of the power amplifier, then the music will definitely be silent).

3. If the music is still silent and the microphone is audible after the above inspection operation, check whether the VOD has a fault. The power amplifier can be moved to a room where both music and microphone are audible for comparison and inspection. If music is audible in other rooms, VOD (song ordering computer) can be checked for problems. If there is a problem with the setting or output of VOD, reset it to solve it.

4. If the audio uses a combination of professional front-stage and professional power amplifier, the inspection is roughly the same as the above method.

2. speaker sound is not normal

1. It is generally impossible for the sound box to burn out all the high, medium and bass units at once. Therefore, if the sound is silent, please check whether there is any problem with VOD, front stage and power amplifier first, and then check the sound box after confirmation.

2. Speaker reverse phase

In actual use, it feels good to turn on one speaker, but when two speakers are turned on at the same time, the sound becomes dry and the bass volume can not be doubled, but the volume can be reduced or not obviously enhanced. This phenomenon is due to the reverse phase of the speakers. Can be solved by the following method.

1. Check whether the speaker cable at the output end of the power amplifier is connected correctly (the positive pole should be connected to the positive pole, and the negative pole should be connected to the negative pole. Generally, the positive pole is red.), Check whether the port of the speaker cable connected to the speaker is connected correctly. If the reverse phase is caused by the wrong system connection, the correct connection can be restored.

2. If the speaker unit is installed in reverse phase, disassemble the speaker and check whether the connecting line of the bass unit is connected incorrectly. If it is connected incorrectly, reconnect the two lines correctly. In addition, a battery can be used for polarity test, touch the battery with a speaker cable, and look at the direction of action of the speaker unit. After the positive and negative poles of the speaker line collide with the positive and negative poles of the battery, if the woofer moves outward, the phase is normal, and if the speaker shrinks inward, the phase is reversed. Shijiazhuang professional audio

3. In addition, if the speaker is installed in reverse phase, the simplest method is to connect the positive and negative poles of the speaker line of a speaker to the output end of the power amplifier.

The 3. speaker emits an abnormal sound of "Bub.

① Disassemble the box net, check whether there is air leakage in the box body, and whether the unit is firmly installed on the box body (sometimes the unit is not firmly installed, and the iron edge of the unit collides with the box body during high-power and high-dynamic use, and the strange sound of air leakage will also be emitted). If each unit is firmly installed, listen carefully to determine from which unit the abnormal sound is emitted.

② Remove the unit with abnormal sound, place the unit flat on the ground, and check whether the bubble edge is leaking and degumming, and whether the dust cap is degumming (usually the sound of "bout" is related to the above reasons). If there is no degumming or leakage, use the right hand finger as a triangular balance to push down the paper tray of the unit naturally (when the normal unit is pushed down, there should be no noise, while the unit due to edge wiping, voice coil deformation and other reasons will make abnormal noise.)

③ If the unit is not firmly installed and makes noise, it can be reinstalled firmly. If the unit is bubbled or the dust cap is degummed and leaked, it can be sealed with agricultural machinery glue (glue for roadside leather shoes) and supplemented with natural air drying.

④ Check whether there is no foam buffer strip at the contact point between the iron net of the sound box and the box body. If there is no foam buffer strip, the noise can be removed by pasting the rubber strip.

⑤ If the speaker unit is burned out, it should be sent back to the manufacturer for maintenance, because the voice coil and paper basin will affect the tone. If the original voice coil and paper basin are not used, the tone of the speaker will change.

4. microphone to make "filth" noise

1. Check whether the connecting wire (especially the ground wire) has deselding, poor contact, etc. If so, it can be welded again.

2. Check whether the microphone line has problems such as internal disconnection and poor contact. If there is an internal break, the line should be changed.

5. warm tips:

1. The front stage and power amplifier that are sent back to the manufacturer for maintenance should write down the fault condition on a small piece of paper and stick the piece of paper firmly on the machine, so that your machine will get the fastest and timely maintenance.

Shijiazhuang professional audio today summed up the sound system prone to failure and solutions, I hope to help everyone!

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