方法 1
方法 1 的 3:修理电线断裂的问题
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1
戴耳机。插进声音源，播放音乐，然后用拇指让线弯90度，绷直耳机线，顺着线从接头试下来。
到断裂的地方后，声音听起来就很嘈杂碎裂不稳定，你可以再把这个点弯曲或扭一扭，看看是否是这个点出问题。找到以后就用电胶带粘起来。
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2
用缩套管顺着线滑下来试。这个缩套管和耳机线剩下的部分看起来很像，如果你把耳机弄断了，就可以用这个缩套管来代替断裂部分。
现在赶快用缩套管。焊接了线以后就不能用它了。
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3
用剥线器打开一个1.25厘米的缺口，你可以小心用刀子在线套上面划一刀，不要把里面的东西也切断了。
这样就可以看到两条线并在一起（左声道、右声道）各自隔开，因此声道不同。中间的铜是用来分开两线的东西。其他情况（苹果耳机等）除了两条声道线以外还有一条裸露的接地线。
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4
把线拼接起来。你可以用两种方法：绞编接头或直列接头。
绞编接头中，将两个裸露部分放平行，然后打圈让它们连起来。
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虽然比后面一种方法要快而简单，这样会造成线的突起，电线的形状显得不自然。
直列接头法：拿着两条线，让一端的尾对着一端的头，然后就可以开始打圈，让线的形状合适、自然点。
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虽然要花更多精力，这种方法更可靠。
在接头的时候，要注意要把同色的线接在一起——红对红，白对白。地线比较简单，所有的都接在一起就可以了。
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5
把连接焊起来。把所有的接头的所有连接点都焊起来，然后让其冷却。
冷却以后把两对接头打好结，确保红线、白线是和地线分开的。
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6
把缩套管套上断裂处，然后加热。不觉得因为焊接前就滑过来了很对吗？
加热后缩套管会缩成之前的四分之一大小，能够让修好的线更牢固。
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方法 2
方法 2 的 3:修理坏了的接头
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1
买个新接头（20RMB左右），金属接头的更好，看起来也不错，但是更贵。塑料的接头也是可以的。可以在网上找到便宜货。Radioshack有点贵。
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2
剪掉接头后一点的电线，留下2.5cm空间，这是可疑的断裂区域，因此本步骤非常非常重要。要剪对地方。
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3
把线剥出来。一般有一个“宽”（无套）的线，和两个有外套的线，前者应该是地线，后面俩是左右两个声道的线。
并列线和单线式是不一样的。（苹果的是单线式的），不过技术是相同的。
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4
把新接头旋开。尾部应该有两条插脚，如果只有一个，则是单声道的，不是立体声的。离中间最远的是做声带的，中间是有声带的。没有插脚的是地线。
按经验来说，白色应该是左声道线，连接接头尖端，红线代表右声道，连接接头环状部分。不确定的话，可以用个多用电表试一试。通过尖端、环状和接头下部（套筒）分别测试看看哪个对应哪个。
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5
把电线焊到接头上。确保要连接正确。最好先白线，然后地线，最后接红线（如果还有一条地线，那就放在最后）。用砂纸打磨接处，然后再焊接，更容易点 。
艰苦的工作完成了。把接头的盖子旋上。插进设备测试，音质应该和新耳机的一样了。
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方法 3
方法 3 的 3:修理耳塞衬套问题（不是声音问题）
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1
买一包万能粘土。是硅做的橡皮泥，可以做各种形状并永久性地黏上去。有很多的颜色可选，价格在60到120人民币之间，根据你买的量价格不同。
一包就很够了。剩下的就下次用。你只要做一小条能让耳塞黏上金属小网的部分就行了，真的，只要拿一小点就够了。
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2
做个小虫的形状，包围着耳塞。用一点小小的粘土，跟橡皮泥一样搓成一小球，尽量让这小条的形状保持均匀，以防在不必要的地方凸起。
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3
剪出合适的长度。用个开箱刀，或美工刀在头尾相接的地方切一下。不要用过多的材料，否则会让耳朵不舒服。
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4
雕成合适形状。弄光滑，修成耳机的形状，等几个小时让它干掉。你可以用手沾点水来弄光滑橡皮泥。
最好等个24小时再带着耳机走路或跑步。
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