一只μVisiON（優威信(xin)）ZL600立體聲藍牙耳機(ji)，故障為不能開機(ji)，充不進電。

　　用小一字儀(yi)表改錐沿(yan)外殼面(mian)板接縫細心(xin)撬(qiao)開正面(mian)蓋板，再小心(xin)取出電(dian)路板和內部電(dian)池。

　　注(zhu)意(yi)：電(dian)路板(ban)與外(wai)殼問有兩處用膠粘接，要用小―字改錐細心(xin)撥(bo)開；麥克風、發聲單元都(dou)用膠固定在外(wai)殼上(shang)了，輕拉出電(dian)路板(ban)到(dao)―定位置就行了，注(zhu)意(yi)別拽斷引線。

　　故障分(fen)析：這款藍牙耳機(ji)使用了容量為l00mAh的(de)鋰(li)聚(ju)合物電(dian)(dian)池(chi)(chi)，鋰(li)電(dian)(dian)池(chi)(chi)帶有充放電(dian)(dian)保(bao)護(hu)(hu)板(ban)。測(ce)量鋰(li)電(dian)(dian)池(chi)(chi)輸出電(dian)(dian)壓(ya)為0．4V左(zuo)右，用5V電(dian)(dian)源(yuan)充電(dian)(dian)，測(ce)得充電(dian)(dian)電(dian)(dian)流為零。剝開(kai)(kai)包在鋰(li)電(dian)(dian)池(chi)(chi)保(bao)護(hu)(hu)板(ban)外層的(de)絕(jue)緣膠皮(pi)，測(ce)得鋰(li)電(dian)(dian)心的(de)電(dian)(dian)壓(ya)為1.05V，說明(ming)鋰(li)電(dian)(dian)池(chi)(chi)電(dian)(dian)壓(ya)太(tai)低，已經低于保(bao)護(hu)(hu)板(ban)的(de)充電(dian)(dian)開(kai)(kai)啟電(dian)(dian)壓(ya)，保(bao)護(hu)(hu)板(ban)起保(bao)護(hu)(hu)作用，斷開(kai)(kai)了充電(dian)(dian)回(hui)路。

　　于是(shi)用外(wai)接5V電(dian)(dian)(dian)源(yuan)串聯33Ω電(dian)(dian)(dian)阻直接對鋰(li)電(dian)(dian)(dian)心(xin)充(chong)(chong)(chong)電(dian)(dian)(dian)，測得(de)充(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流從100mA逐漸下降，鋰(li)電(dian)(dian)(dian)心(xin)的端電(dian)(dian)(dian)壓逐漸上(shang)升，當上(shang)升到(dao)3V左右時(shi)(shi)停止外(wai)接充(chong)(chong)(chong)電(dian)(dian)(dian)，使用原機配的充(chong)(chong)(chong)電(dian)(dian)(dian)線插(cha)人藍(lan)牙耳(er)機的充(chong)(chong)(chong)電(dian)(dian)(dian)插(cha)口(kou)，這時(shi)(shi)可以(yi)正(zheng)(zheng)常(chang)(chang)充(chong)(chong)(chong)電(dian)(dian)(dian)了(le)！將鋰(li)電(dian)(dian)(dian)心(xin)和保護板用絕緣膠(jiao)皮(pi)包好，裝回耳(er)機內部，按原樣恢復藍(lan)牙耳(er)機，正(zheng)(zheng)常(chang)(chang)充(chong)(chong)(chong)電(dian)(dian)(dian)，雨個(ge)多(duo)小時(shi)(shi)后充(chong)(chong)(chong)滿電(dian)(dian)(dian)，可以(yi)正(zheng)(zheng)常(chang)(chang)使用了(le)。

　　本以為這個藍牙耳機修(xiu)復成(cheng)功了(le)，于是用其聽(ting)歌試(shi)用，2個多小時(shi)后電量耗盡自動關機，再(zai)測(ce)試(shi)又(you)回到了(le)原(yuan)來的故(gu)障狀態：既不能開機也(ye)充不進電，又(you)處于保護狀杰(jie)。

　　綜(zong)合分析：鋰(li)(li)電(dian)(dian)(dian)池(chi)保(bao)護板(ban)(ban)的(de)放電(dian)(dian)(dian)保(bao)護功能失效，放電(dian)(dian)(dian)終止電(dian)(dian)(dian)壓(ya)低于充電(dian)(dian)(dian)開(kai)啟電(dian)(dian)(dian)壓(ya)。可(ke)以選擇的(de)修復方(fang)案有(you)(you)：（1）更(geng)換新的(de)帶保(bao)護板(ban)(ban)的(de)鋰(li)(li)電(dian)(dian)(dian)池(chi)。但一時很難買到容量相近、尺寸相符的(de)鋰(li)(li)電(dian)(dian)(dian)池(chi)；（2）保(bao)留鋰(li)(li)電(dian)(dian)(dian)心(xin)，更(geng)換鋰(li)(li)電(dian)(dian)(dian)保(bao)護板(ban)(ban)。可(ke)從淘(tao)汰的(de)或損壞的(de)舊MP3內部的(de)鋰(li)(li)電(dian)(dian)(dian)池(chi)上(shang)(shang)拆(chai)下大小合適的(de)鋰(li)(li)電(dian)(dian)(dian)保(bao)護板(ban)(ban)換上(shang)(shang)，但這條途徑(jing)也有(you)(you)困(kun)難。在上(shang)(shang)述兩種方(fang)法都難以實現的(de)情況(kuang)下，我采用(yong)了如圖所示的(de)應急方(fang)法進行維修。

　　修理方法：圖(tu)(tu)中虛線(xian)方框中為鋰電(dian)(dian)(dian)(dian)保護(hu)板(ban)內部示(shi)意圖(tu)(tu)，經檢查，這(zhe)個藍牙耳機的(de)(de)鋰電(dian)(dian)(dian)(dian)保護(hu)板(ban)在(zai)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)負極(ji)(ji)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路中有一個無(wu)(wu)觸(chu)點(dian)開(kai)(kai)關(guan)，鋰電(dian)(dian)(dian)(dian)保護(hu)板(ban)通(tong)(tong)過(guo)這(zhe)個無(wu)(wu)觸(chu)點(dian)開(kai)(kai)關(guan)的(de)(de)通(tong)(tong)、斷來對鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)起(qi)充、放電(dian)(dian)(dian)(dian)保護(hu)作(zuo)用(yong)。現在(zai)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)保護(hu)板(ban)的(de)(de)放電(dian)(dian)(dian)(dian)倮護(hu)功能失效，放電(dian)(dian)(dian)(dian)終止電(dian)(dian)(dian)(dian)壓低于(yu)充電(dian)(dian)(dian)(dian)開(kai)(kai)啟電(dian)(dian)(dian)(dian)壓，導致(zhi)無(wu)(wu)法充電(dian)(dian)(dian)(dian)，為此，用(yong)電(dian)(dian)(dian)(dian)阻R和(he)發(fa)(fa)光二(er)極(ji)(ji)管(guan)D串(chuan)聯后再(zai)并(bing)接到這(zhe)個無(wu)(wu)觸(chu)點(dian)開(kai)(kai)關(guan)的(de)(de)兩側（即(ji)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)保護(hu)板(ban)的(de)(de)負極(ji)(ji)引出線(xian)與(yu)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)負極(ji)(ji)之間(jian)），為鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)搭建負極(ji)(ji)輔助充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路。發(fa)(fa)光二(er)極(ji)(ji)管(guan)D選用(yong)導通(tong)(tong)電(dian)(dian)(dian)(dian)壓1．5V～2．0V的(de)(de)紅色或綠(lv)色貼(tie)片LED，電(dian)(dian)(dian)(dian)阻R起(qi)限流作(zuo)用(yong)，可(ke)選用(yong)100Ω左右的(de)(de)貼(tie)片電(dian)(dian)(dian)(dian)阻。

       充電過程：剛充電時鋰電池電壓低于鋰電保護板的充電開啟電壓，鋰電保護板內部的無觸點開關斷開，但充電電流由電源正極流經鋰電池后，從鋰電池的負極經電阻R和發光二極管D流到電源負極，給鋰電池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)：隨著充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)進行，鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)逐漸上(shang)升達到(dao)(dao)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)開啟電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)時，鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)內部的(de)無(wu)(wu)觸(chu)點開關導通，鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進人正常充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態；當鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)到(dao)(dao)約3．7V（實測）時，發光(guang)二極管D截止，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻R和發光(guang)二極管D串(chuan)聯構成的(de)負(fu)極輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)斷(duan)開，但這(zhe)時鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)維持對鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)；當鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)滿時（約4．2V），鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)內部的(de)無(wu)(wu)觸(chu)點開關斷(duan)開，起到(dao)(dao)充(chong)(chong)滿保(bao)護作用。

　　由于(yu)電阻R和發光二極管D這兩個貼(tie)片元件體積很小，將它(ta)們串聯焊在一起，并聯到鋰電池保護板(ban)上后可以直接放(fang)在保護板(ban)邊(bian)上，也可以用細導線引出(chu)來用雙面不干膠粘(zhan)貼(tie)在藍牙耳(er)機(ji)內部(bu)合適(shi)的位置。

　　注意事項：由于是靠發光二極管D的截止電壓來斷開輔助充電電路，輔助充電電路沒有穩定的關斷電壓，因此輸人的充電電源電壓應以⒋5V～5．0V為宜，盡可能接近5V，最高不能超過5．2V。日前市場上銷售的有些充電器實際輸(shu)出電壓(ya)(ya)與標(biao)稱值(zhi)相差很大，一定要實測(ce)輸(shu)出電壓(ya)(ya)是否在上述范圍之(zhi)內。

　　由于這樣修理(li)后鋰(li)(li)電(dian)池(chi)并沒有(you)恢(hui)復放(fang)(fang)電(dian)保護功能(neng)，使(shi)用(yong)中(zhong)可能(neng)會(hui)因過放(fang)(fang)電(dian)影響鋰(li)(li)電(dian)池(chi)的(de)壽命，因此使(shi)用(yong)中(zhong)要注意電(dian)池(chi)放(fang)(fang)完電(dian)后應及(ji)時(shi)(shi)充電(dian)，不要在(zai)低電(dian)壓下長時(shi)(shi)間(jian)擱置(zhi)，最好不要等電(dian)量耗(hao)盡再充電(dian)，當工作中(zhong)藍牙耳機發出“嘀嘀”提示(shi)音時(shi)(shi)就要及(ji)時(shi)(shi)充電(dian)。當然，這是(shi)應急使(shi)用(yong)的(de)方法(fa)，能(neng)買到相近規格的(de)鋰(li)(li)電(dian)池(chi)直接代(dai)換最好。