一只μVisiON（優威信(xin)）ZL600立體聲藍(lan)牙耳(er)機，故(gu)障為不能開機，充(chong)不進電。

　　用小(xiao)一字儀(yi)表改錐沿外殼面板接(jie)縫細心(xin)撬開正面蓋板，再小(xiao)心(xin)取出電路(lu)板和內部電池。

　　注意：電(dian)路(lu)板與外殼問有(you)兩處用膠粘接，要用小(xiao)―字改(gai)錐(zhui)細心撥開；麥克風、發聲單元都用膠固定在外殼上了，輕拉出電(dian)路(lu)板到―定位置就(jiu)行了，注意別拽斷引(yin)線。

　　故(gu)障分析：這款藍牙耳機使(shi)用(yong)了(le)容量(liang)為(wei)l00mAh的(de)鋰(li)聚(ju)合物電(dian)(dian)(dian)池，鋰(li)電(dian)(dian)(dian)池帶有(you)充放電(dian)(dian)(dian)保護(hu)板(ban)。測量(liang)鋰(li)電(dian)(dian)(dian)池輸出(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)為(wei)0．4V左(zuo)右(you)，用(yong)5V電(dian)(dian)(dian)源(yuan)充電(dian)(dian)(dian)，測得充電(dian)(dian)(dian)電(dian)(dian)(dian)流為(wei)零。剝開(kai)包在鋰(li)電(dian)(dian)(dian)池保護(hu)板(ban)外層的(de)絕緣膠皮，測得鋰(li)電(dian)(dian)(dian)心的(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)為(wei)1.05V，說明鋰(li)電(dian)(dian)(dian)池電(dian)(dian)(dian)壓(ya)(ya)(ya)太低，已經低于保護(hu)板(ban)的(de)充電(dian)(dian)(dian)開(kai)啟電(dian)(dian)(dian)壓(ya)(ya)(ya)，保護(hu)板(ban)起保護(hu)作(zuo)用(yong)，斷開(kai)了(le)充電(dian)(dian)(dian)回(hui)路。

　　于是用外接5V電(dian)(dian)源串聯33Ω電(dian)(dian)阻直接對鋰(li)(li)電(dian)(dian)心(xin)充(chong)電(dian)(dian)，測得(de)充(chong)電(dian)(dian)電(dian)(dian)流從100mA逐(zhu)漸下降，鋰(li)(li)電(dian)(dian)心(xin)的(de)端電(dian)(dian)壓逐(zhu)漸上升(sheng)，當(dang)上升(sheng)到3V左(zuo)右時停止外接充(chong)電(dian)(dian)，使(shi)用原(yuan)機配(pei)的(de)充(chong)電(dian)(dian)線插(cha)人藍(lan)牙耳機的(de)充(chong)電(dian)(dian)插(cha)口(kou)，這時可以正常充(chong)電(dian)(dian)了！將鋰(li)(li)電(dian)(dian)心(xin)和保護板用絕緣膠皮包好，裝回(hui)耳機內部，按原(yuan)樣恢(hui)復(fu)藍(lan)牙耳機，正常充(chong)電(dian)(dian)，雨個多小(xiao)時后充(chong)滿電(dian)(dian)，可以正常使(shi)用了。

　　本以為這個(ge)(ge)藍牙耳機(ji)修復成功了，于是用(yong)其聽(ting)歌試(shi)用(yong)，2個(ge)(ge)多小(xiao)時后電量(liang)耗盡自動關機(ji)，再測試(shi)又回到了原來的(de)故障(zhang)狀態：既不能(neng)開機(ji)也充不進電，又處于保(bao)護狀杰。

　　綜合分析(xi)：鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池保(bao)護板的(de)(de)(de)放電(dian)(dian)(dian)(dian)(dian)保(bao)護功能失效，放電(dian)(dian)(dian)(dian)(dian)終(zhong)止電(dian)(dian)(dian)(dian)(dian)壓(ya)低于充(chong)電(dian)(dian)(dian)(dian)(dian)開啟電(dian)(dian)(dian)(dian)(dian)壓(ya)。可以選擇(ze)的(de)(de)(de)修復方案有(you)：（1）更換新的(de)(de)(de)帶保(bao)護板的(de)(de)(de)鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池。但(dan)(dan)一時(shi)很(hen)難買到容量相(xiang)近、尺寸相(xiang)符的(de)(de)(de)鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池；（2）保(bao)留鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)心，更換鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護板。可從淘汰的(de)(de)(de)或損壞的(de)(de)(de)舊MP3內(nei)部的(de)(de)(de)鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池上(shang)(shang)拆下(xia)大小合適的(de)(de)(de)鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護板換上(shang)(shang)，但(dan)(dan)這條途徑也有(you)困(kun)難。在上(shang)(shang)述兩種方法(fa)都難以實(shi)現的(de)(de)(de)情況下(xia)，我(wo)采(cai)用(yong)了(le)如圖所示(shi)的(de)(de)(de)應急(ji)方法(fa)進(jin)行(xing)維修。

　　修理方法(fa)：圖(tu)中(zhong)(zhong)虛線(xian)方框中(zhong)(zhong)為鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)板內部示意圖(tu)，經檢(jian)查，這(zhe)(zhe)個(ge)藍牙耳機的鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)板在鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)負(fu)極充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)有一個(ge)無(wu)(wu)觸點開關，鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)板通過這(zhe)(zhe)個(ge)無(wu)(wu)觸點開關的通、斷來對(dui)鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)起(qi)充、放(fang)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)(hu)作(zuo)(zuo)用(yong)(yong)。現在鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)保(bao)護(hu)(hu)板的放(fang)電(dian)(dian)(dian)(dian)(dian)倮護(hu)(hu)功能失效，放(fang)電(dian)(dian)(dian)(dian)(dian)終(zhong)止(zhi)電(dian)(dian)(dian)(dian)(dian)壓低(di)于充電(dian)(dian)(dian)(dian)(dian)開啟電(dian)(dian)(dian)(dian)(dian)壓，導(dao)(dao)致無(wu)(wu)法(fa)充電(dian)(dian)(dian)(dian)(dian)，為此，用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)阻R和發光(guang)二極管(guan)D串聯后再并(bing)接(jie)到這(zhe)(zhe)個(ge)無(wu)(wu)觸點開關的兩側（即鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)保(bao)護(hu)(hu)板的負(fu)極引出線(xian)與鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)負(fu)極之(zhi)間），為鋰(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)搭建負(fu)極輔助充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)。發光(guang)二極管(guan)D選(xuan)用(yong)(yong)導(dao)(dao)通電(dian)(dian)(dian)(dian)(dian)壓1．5V～2．0V的紅色或綠色貼片LED，電(dian)(dian)(dian)(dian)(dian)阻R起(qi)限流(liu)作(zuo)(zuo)用(yong)(yong)，可(ke)選(xuan)用(yong)(yong)100Ω左右(you)的貼片電(dian)(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)電(dian)(dian)(dian)(dian)(dian)(dian)：隨著充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)進(jin)行(xing)，鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓逐漸上(shang)升達到鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)(hu)板(ban)的(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)開(kai)(kai)啟(qi)電(dian)(dian)(dian)(dian)(dian)(dian)壓時，鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)(hu)板(ban)內部(bu)的(de)無(wu)觸(chu)點(dian)(dian)開(kai)(kai)關導通，鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)池進(jin)人(ren)正常充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態；當鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)到約3．7V（實測(ce)）時，發(fa)光二極管D截止，電(dian)(dian)(dian)(dian)(dian)(dian)阻R和發(fa)光二極管D串(chuan)聯(lian)構成的(de)負(fu)極輔助(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)斷(duan)開(kai)(kai)，但這時鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)(hu)板(ban)維(wei)持對鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)；當鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)滿(man)時（約4．2V），鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)(hu)板(ban)內部(bu)的(de)無(wu)觸(chu)點(dian)(dian)開(kai)(kai)關斷(duan)開(kai)(kai)，起到充(chong)滿(man)保(bao)(bao)護(hu)(hu)作用。

　　由于電阻R和發(fa)光二極管D這兩個貼片元件體積很小，將它們串(chuan)聯焊在(zai)一起(qi)，并聯到鋰電池(chi)保護板上(shang)后(hou)可以直接放在(zai)保護板邊上(shang)，也可以用細導線引出來用雙面不干(gan)膠粘貼在(zai)藍牙耳機內(nei)部合(he)適的位置(zhi)。

　　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出電(dian)壓與標稱值(zhi)相差(cha)很大，一定(ding)要實測輸出電(dian)壓是(shi)否在(zai)上述范圍之內。

　　由于這(zhe)樣修(xiu)理后鋰(li)(li)電池(chi)(chi)并沒(mei)有(you)恢復放(fang)(fang)電保護功能，使用(yong)中(zhong)可能會因(yin)過放(fang)(fang)電影響鋰(li)(li)電池(chi)(chi)的壽(shou)命，因(yin)此使用(yong)中(zhong)要注意(yi)電池(chi)(chi)放(fang)(fang)完電后應及時(shi)充(chong)電，不要在低電壓下長時(shi)間擱(ge)置，最好不要等電量耗盡(jin)再充(chong)電，當工作中(zhong)藍牙耳機發(fa)出“嘀(di)嘀(di)”提(ti)示音時(shi)就要及時(shi)充(chong)電。當然(ran)，這(zhe)是應急使用(yong)的方(fang)法，能買(mai)到相近規格的鋰(li)(li)電池(chi)(chi)直(zhi)接(jie)代換(huan)最好。