学校和单位大多组建报告厅音响系统，方便了自己使用，可是在报告厅音响在使用过程中没有了声音是一件让人头痛的事。下面就来讲讲相关原因。
Most schools and units have set up a sound system in the lecture hall, which is convenient for them to use. However, it is a headache that there is no sound in the use of the sound in the lecture hall. Now let's talk about the relevant reasons.
The sound in the lecture hall is silent
1.扬声器接线断开或分频器异常
1. The loudspeaker wiring is disconnected or the frequency divider is abnormal
扬声器接线断裂后，扬声器单元没有激励电压，会造成无声故障。分频器一般不易断线，但可能发生导线接头脱焊、分频电容器短路等故障。
After the speaker wiring is broken, the speaker unit has no excitation voltage, which will cause silent failure. The frequency divider is generally not easy to be disconnected, but the wire joint may be disconnected, and the frequency divider capacitor may be short circuited.
2.音圈断
2. Broken voice coil
万用表搁可用&迟颈尘别蝉;1档测量扬声器引出线焊片。如果电阻值为&颈苍蹿颈苍;，可以用刀刮掉音圈两端引线的密封漆，露出裸铜线后再测量。如果仍然不通过，则表示音圈内部断线;如果测量已通过，则有袄"喀喀袄"声音表说明音圈引线断路，可以在线头上焊接好，然后用另一段类似音圈绕线的漆包线焊接。
Multimeter r available × Measure the outgoing line solder of the loudspeaker in gear 1. If the resistance value is ∞, scrape off the sealing paint of the leads at both ends of the voice coil with a knife, expose the bare copper wire, and then measure. If it still fails, it means that the voice coil is broken inside; If the measurement has passed, there is a sound meter of "KaKa" indicating that the voice coil lead is open circuit, which can be welded on the wire head, and then welded with another section of enameled wire similar to voice coil winding.
3.扬声器导线断开
3. Speaker wire is disconnected
由于扬声器纸盆振动频繁，编织线容易断裂，有时导线断裂，但棉芯线仍保持连接。这种编织线不容易买到，可以用稍长的软线代替。
Due to the frequent vibration of the loudspeaker paper basin, the braided wire is easy to break, and sometimes the wire breaks, but the cotton core wire remains connected. This kind of braided thread is not easy to buy and can be replaced by a slightly longer flexible cord.
4.音圈烧毁
4. Voice coil burned
用万用表搁&迟颈尘别蝉;如果阻值接近0，1档测量扬声器引线&翱尘别驳补;，且无袄"喀喀袄"声音表明音圈烧坏了。更换音圈前，应磁间隙中的杂物，然后小心将新音圈放入磁间隙，纠正音圈，用强胶固定音圈的上下位置。音圈放置在佳位置后，用强胶填充音圈与纸盆之间的间隙，后密封防尘盖，扬声器纸盆向上，后正常使用。
Use multimeter R × If the resistance value is close to 0, measure the speaker lead Ω in gear 1, and there is no "click click" sound, indicating that the voice coil is burnt out. Before replacing the voice coil, remove the sundries in the magnetic gap, and then carefully put the new voice coil into the magnetic gap, correct the voice coil, and fix the upper and lower positions of the voice coil with strong glue. After the voice coil is placed in a good position, fill the gap between the voice coil and the paper basin with strong glue, seal the dust cover behind, and the speaker paper basin is upward. It will be used normally after one day.
有时没有声音有时又有声音
Sometimes there is no sound, sometimes there is sound
1.扬声器导线不良
1. Poor speaker wire
通常是由音圈引线发霉或焊接不良引起的。当纸盆振动频繁时，断点有时打开，有时断开，形成不规则噪音时无故障。
It is usually caused by moldy voice coil leads or poor welding. When the paper basin vibrates frequently, the breakpoint sometimes opens and sometimes disconnects, and there is no fault when irregular noise is formed.
2.音圈引线断线或即将短路。
2. The voice coil lead is broken or about to be short circuited.
3.功率放大器输出插头接触不良或扬声器输入线断线。
3. The output plug of power amplifier is in poor contact or the input line of loudspeaker is broken.
以上是对于报告厅音响无声的原因的全部内容，如果您有相关的项目需求中有用到报告厅音响请联系我们
，为您提供好的帮助。
The above is all about the reason why the sound in the lecture hall is silent. Please contact us if you have relevant project needs that are useful for the sound in the lecture hall , to provide you with good help.
