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The speaker manufacturer tells you what failure analysis
Author:管理员    Released in:2015-08-06 10:13:48    Written words:【Big】【In the】【Small

1. The speaker cable is disconnected or the frequency divider is abnormal. After the speaker wire is broken, the speaker unit has no excitation voltage, which will cause a silent failure. The frequency divider is generally not easy to break, but there may be failures such as lead connector unsoldering and short circuit of the frequency divider capacitor.

2. The voice coil is broken. Use a multimeter to measure the soldering lugs of the speaker lead wires. If the resistance is ∞, use a knife to scrape off the paint on the leads at both ends of the voice coil to expose the bare copper wire before testing. If it still doesn’t work, it means the inside of the voice coil. Broken wire; if the measurement is on and there is a "click" sound, it indicates that the voice coil lead is broken. Solder the wire end, and then another piece of enameled wire similar to the voice coil winding can be soldered.

3. The speaker wire is broken. Because the speaker cone vibrates frequently, the braided wire is easy to break, and sometimes the wire is broken, but the cotton core wire is still connected. This kind of braided wire is not easily available and can be replaced by a slightly longer flexible wire.

4. The voice coil burned out. Use a multimeter to measure the speaker lead in the R×1 file. If the resistance is close to 0Ω and there is no "click", it means that the voice coil is burned out. Before replacing the voice coil, remove the debris in the magnetic gap first, and then carefully put the new voice coil into the magnetic gap, right the voice coil, and fix the upper and lower positions of the voice coil with super glue while listening, until the voice coil is in the best position After the position, use super glue to fill the gap between the voice coil and the paper cone to about half, and finally seal the dust cover, and put the speaker cone up, and it can be used normally after one day.

Sometimes no sound

1. The speaker leads are bad. It is usually caused by mold breakage of the voice coil wire or poor welding. When the paper cone vibrates frequently, the breakpoint will be connected and disconnected from time to time, resulting in an irregular sound and no sound.

2. The voice coil lead wire is broken or about to be short-circuited.

3. The power amplifier output jack is in poor contact or the speaker input wire is disconnected.

1. The performance of the speaker is poor, and the magnetism of the magnet is reduced. The sensitivity of the speaker mainly depends on the magnetism of the permanent magnet, the quality of the paper cone and the quality of the assembly process. Ferromagnetic objects can be used to touch the magnetic steel, and the strength of the magnetic steel can be roughly estimated according to the size of the attractive force. If the magnetism is too weak, the speaker can only be replaced.

2. The magnetic core pin is loose. When the magnetic conductive core of the speaker is loose, it will be attracted to one side by the magnetic conductive plate, causing the voice coil to be squeezed to hinder normal sound production. When overhauling, you can lightly press the paper cone with your hands. If you can't press it, it may be that the voice coil is pressed by the stem, and you need to disassemble and re-fix it before it can be used again.

3. The divider is abnormal. When there is a defective component in the frequency divider, the signal of the corresponding frequency band is blocked, and the speaker of this frequency band has a small volume failure. Should focus on checking whether the crossover capacitor in parallel with the woofer is short-circuited, and whether the crossover inductance coil in parallel with the tweeter is short-circuited between layers.

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Company Name: Fujian Holly Card Co. Limited
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Stree/Address:No.266, Tian-yi Section, Gulou Area. Fuzhou City,Fujian Province,P.R. China 350003
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Address: Liyuan New Village,Longhua Street, Longhua District, Shenzhen city, Guangdong Province,China
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