Common problems and repair methods of speakers

When adjusting the volume, there will be a crackling sound, sometimes louder and sometimes quieter.

Presumably, this is the most common problem encountered by ordinary users, and I believe many users will have this experience. This problem occurs when you adjust the volume of the audio after using it for a period of time. Many users simply fix the sound wheel on the speaker and use the volume adjustment of the computer system to control the sound. This is undoubtedly a temporary solution, but it does not solve the fundamental problem.

potentiometer

In fact, the occurrence of this problem can be judged as a problem with the phase shifter that adjusts the volume. Most speakers use potentiometers to change the strength of the signal (except for digital tuning potentiometers), in order to adjust the volume and bass. The potentiometer, on the other hand, changes its position on the carbon resistor through a movable contact, thereby altering the resistance value. As the usage time increases, dust or impurities may fall into the potentiometer, and the contacts of the potentiometer may also oxidize and rust, causing poor contact. At this time, there will be a "crackling" noise when adjusting the volume. (This article is kindly provided by the official website of Wuhan Livable Smart Home)

Solution: Replace the potentiometer, which only costs about 2 yuan, but you have to do it yourself. Additionally, you can open the four pressure contacts behind the potentiometer to expose its movable contacts. Then, clean the carbon barrier with anhydrous alcohol, add a drop of oil to the carbon barrier, and install it to solve the noise problem.

2. The sound can be played, but there may be occasional noise.

Some users may encounter this problem with the small speakers or counterfeit brand speakers they buy in the market. When using the speakers, there may be occasional "crackling" noise, and sometimes the sound may even be high pitched and harsh. The sound will be better when you put on the headphones. This makes many beginners feel very strange, because at first they may think about whether it is a problem with their software settings or their computer hardware. Another possibility is the poor contact of the audio cable connector, so plug and unplug technology is implemented.

The socket is also an electrical appliance that cannot be damaged

In fact, the problem is caused by unstable voltage, which is likely to be a problem with the socket itself, because the poor quality of the phosphor copper sheets used inside the socket can cause looseness or a good elastic cloth, causing the power supply of the speaker to come into contact and then disconnect. Because at the moment of on-off, there will be interference signals from current entering the amplification circuit, which will cause the generation of other noises, that is, the "crackling" sound you hear.

Solution: A very simple solution is to throw away the current socket and buy a high-end socket from a well-known brand, and the problem will be solved. The editor once again reminds everyone not to seek repair shops when encountering problems, as even if there are no issues, they will still fix them for you.

3. High pitched, no bass.

This type of malfunction is usually caused by the volume of the speaker being too high, which burns out the subwoofer after prolonged use. This is normal, friends who like bass believe that the larger the volume, the better. Some friends can even turn it up very high and adjust the volume to over 70%, which is the easiest way to burn out the bass. Normally, it is recommended to choose a volume of 30% -50% and a bass of 30% -40%, which is sufficient. Additionally, this situation may also be due to a broken wire end.

Solution: Changing the wire head. Changing the wire head is a very simple matter. You can ask the repairman at the repair shop for at least 20-30 yuan. If you don't understand, just search on Baidu yourself.

4. Turn on the speaker switch, and the speaker will emit a "buzzing" sound that keeps going, and the noise cannot be eliminated.

This is a problem that the editor has encountered before. After turning on the power, it kept making a loud noise, and then he tried to tinker with the plugging and unplugging techniques for a while. In the end, it failed and the power was cut off. When I got bored with the second question and plugged it in again, I was amazed and able to use it again. I was happy, but still didn't want to investigate what was going on?

This situation is usually due to long-term use, coupled with the fact that the speaker is enclosed and cannot dissipate heat. So its internal temperature is too high, causing the amplifier integrated block to overheat and be damaged. In fact, genuine amplifier integrated circuits come with temperature protection function. When overheated, the amplifier integrated circuit will automatically stop outputting; And when the temperature drops, it can automatically resume work.

Circuit board

Some speaker manufacturers, in order to reduce production costs, do not use branded integrated circuits from large manufacturers, but instead use integrated circuits replicated by small factories, which are of poor quality.

Explanation of Circuit Board Components

Solution: Just buy a well-known brand circuit board and replace it yourself, but this operation requires a bit of technical expertise. I hope everyone can take on the challenge.