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

　　用小一字儀表(biao)改錐沿外殼面板接縫細心撬(qiao)開正面蓋板，再小心取(qu)出電(dian)路板和(he)內部(bu)電(dian)池。

　　注意(yi)：電(dian)路(lu)板與(yu)外殼問有兩處(chu)用膠粘接，要用小―字(zi)改(gai)錐(zhui)細心撥(bo)開(kai)；麥(mai)克風(feng)、發聲(sheng)單元都用膠固定(ding)在外殼上了，輕(qing)拉出電(dian)路(lu)板到―定(ding)位置就(jiu)行了，注意(yi)別(bie)拽斷引線。

　　故(gu)障分析：這款藍(lan)牙耳(er)機使(shi)用了(le)容量為(wei)l00mAh的(de)鋰(li)(li)聚合物電(dian)(dian)(dian)(dian)池(chi)，鋰(li)(li)電(dian)(dian)(dian)(dian)池(chi)帶(dai)有充(chong)放電(dian)(dian)(dian)(dian)保護(hu)板(ban)。測量鋰(li)(li)電(dian)(dian)(dian)(dian)池(chi)輸出電(dian)(dian)(dian)(dian)壓(ya)為(wei)0．4V左右，用5V電(dian)(dian)(dian)(dian)源充(chong)電(dian)(dian)(dian)(dian)，測得充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流為(wei)零。剝開包在鋰(li)(li)電(dian)(dian)(dian)(dian)池(chi)保護(hu)板(ban)外(wai)層的(de)絕緣膠皮(pi)，測得鋰(li)(li)電(dian)(dian)(dian)(dian)心的(de)電(dian)(dian)(dian)(dian)壓(ya)為(wei)1.05V，說明鋰(li)(li)電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)壓(ya)太低，已經低于保護(hu)板(ban)的(de)充(chong)電(dian)(dian)(dian)(dian)開啟(qi)電(dian)(dian)(dian)(dian)壓(ya)，保護(hu)板(ban)起保護(hu)作用，斷開了(le)充(chong)電(dian)(dian)(dian)(dian)回路(lu)。

　　于是(shi)用(yong)外(wai)接(jie)5V電(dian)(dian)(dian)源串聯33Ω電(dian)(dian)(dian)阻直(zhi)接(jie)對鋰(li)電(dian)(dian)(dian)心充(chong)(chong)(chong)電(dian)(dian)(dian)，測得充(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流從(cong)100mA逐漸下降，鋰(li)電(dian)(dian)(dian)心的(de)端電(dian)(dian)(dian)壓逐漸上升(sheng)，當上升(sheng)到(dao)3V左右(you)時停(ting)止外(wai)接(jie)充(chong)(chong)(chong)電(dian)(dian)(dian)，使用(yong)原機(ji)配的(de)充(chong)(chong)(chong)電(dian)(dian)(dian)線插(cha)人藍牙耳(er)機(ji)的(de)充(chong)(chong)(chong)電(dian)(dian)(dian)插(cha)口，這時可以(yi)正(zheng)常充(chong)(chong)(chong)電(dian)(dian)(dian)了！將鋰(li)電(dian)(dian)(dian)心和(he)保護板用(yong)絕緣膠皮(pi)包好，裝(zhuang)回耳(er)機(ji)內部(bu)，按原樣恢復藍牙耳(er)機(ji)，正(zheng)常充(chong)(chong)(chong)電(dian)(dian)(dian)，雨(yu)個多小時后(hou)充(chong)(chong)(chong)滿電(dian)(dian)(dian)，可以(yi)正(zheng)常使用(yong)了。

　　本(ben)以(yi)為(wei)這(zhe)個藍牙耳機(ji)修(xiu)復成功了(le)，于(yu)是用其聽歌試(shi)用，2個多小時后電(dian)量耗盡自動關機(ji)，再(zai)測試(shi)又回到(dao)了(le)原(yuan)來(lai)的故障狀態：既不(bu)能(neng)開(kai)機(ji)也充(chong)不(bu)進電(dian)，又處于(yu)保護(hu)狀杰。

　　綜(zong)合分析(xi)：鋰(li)(li)電(dian)(dian)池保(bao)(bao)護板(ban)的(de)放電(dian)(dian)保(bao)(bao)護功能失效，放電(dian)(dian)終止電(dian)(dian)壓低于充(chong)電(dian)(dian)開啟電(dian)(dian)壓。可以(yi)選擇的(de)修復方(fang)案有：（1）更換(huan)新的(de)帶(dai)保(bao)(bao)護板(ban)的(de)鋰(li)(li)電(dian)(dian)池。但(dan)一(yi)時很難(nan)買到容量相近、尺寸相符的(de)鋰(li)(li)電(dian)(dian)池；（2）保(bao)(bao)留鋰(li)(li)電(dian)(dian)心，更換(huan)鋰(li)(li)電(dian)(dian)保(bao)(bao)護板(ban)。可從淘(tao)汰的(de)或(huo)損(sun)壞的(de)舊MP3內部的(de)鋰(li)(li)電(dian)(dian)池上(shang)拆(chai)下大小合適的(de)鋰(li)(li)電(dian)(dian)保(bao)(bao)護板(ban)換(huan)上(shang)，但(dan)這條途徑也有困難(nan)。在(zai)上(shang)述兩種方(fang)法都難(nan)以(yi)實現的(de)情(qing)況下，我采用了如圖所(suo)示的(de)應急方(fang)法進(jin)行維修。

　　修(xiu)理(li)方法：圖中(zhong)虛線方框中(zhong)為鋰(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)板內部示意(yi)圖，經檢查(cha)，這(zhe)個(ge)(ge)藍牙(ya)耳機的(de)(de)鋰(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)板在鋰(li)電(dian)(dian)(dian)(dian)(dian)池負(fu)極充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路中(zhong)有一個(ge)(ge)無觸點(dian)開關(guan)，鋰(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)板通過這(zhe)個(ge)(ge)無觸點(dian)開關(guan)的(de)(de)通、斷(duan)來對鋰(li)電(dian)(dian)(dian)(dian)(dian)池起充、放(fang)電(dian)(dian)(dian)(dian)(dian)保(bao)護(hu)作用。現在鋰(li)電(dian)(dian)(dian)(dian)(dian)池保(bao)護(hu)板的(de)(de)放(fang)電(dian)(dian)(dian)(dian)(dian)倮護(hu)功能失效，放(fang)電(dian)(dian)(dian)(dian)(dian)終止電(dian)(dian)(dian)(dian)(dian)壓低于充電(dian)(dian)(dian)(dian)(dian)開啟電(dian)(dian)(dian)(dian)(dian)壓，導致無法充電(dian)(dian)(dian)(dian)(dian)，為此，用電(dian)(dian)(dian)(dian)(dian)阻(zu)R和(he)發(fa)光二極管(guan)D串(chuan)聯后再并接(jie)到這(zhe)個(ge)(ge)無觸點(dian)開關(guan)的(de)(de)兩(liang)側（即(ji)鋰(li)電(dian)(dian)(dian)(dian)(dian)池保(bao)護(hu)板的(de)(de)負(fu)極引出(chu)線與鋰(li)電(dian)(dian)(dian)(dian)(dian)池負(fu)極之間），為鋰(li)電(dian)(dian)(dian)(dian)(dian)池搭(da)建負(fu)極輔(fu)助充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路。發(fa)光二極管(guan)D選用導通電(dian)(dian)(dian)(dian)(dian)壓1．5V～2．0V的(de)(de)紅色或(huo)綠色貼片LED，電(dian)(dian)(dian)(dian)(dian)阻(zu)R起限流作用，可選用100Ω左右的(de)(de)貼片電(dian)(dian)(dian)(dian)(dian)阻(zu)。

       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)：隨著充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)的(de)進行，鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)壓逐漸(jian)上升(sheng)達到鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)開(kai)啟電(dian)(dian)(dian)(dian)(dian)壓時，鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)內部的(de)無觸點(dian)開(kai)關導通(tong)，鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)進人正常充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)狀態；當(dang)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)到約(yue)3．7V（實(shi)測）時，發光二極(ji)管D截止，電(dian)(dian)(dian)(dian)(dian)阻R和發光二極(ji)管D串聯(lian)構成的(de)負(fu)極(ji)輔助充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路斷開(kai)，但(dan)這(zhe)時鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)維持(chi)對鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)；當(dang)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)滿時（約(yue)4．2V），鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)保(bao)護板(ban)內部的(de)無觸點(dian)開(kai)關斷開(kai)，起到充(chong)(chong)滿保(bao)護作用。

　　由于電(dian)阻(zu)R和發光(guang)二極管D這兩(liang)個(ge)貼片元件體積很小，將(jiang)它們串聯焊在一起，并聯到鋰電(dian)池保護板(ban)上后可(ke)以直接放在保護板(ban)邊上，也(ye)可(ke)以用(yong)細導線引出來用(yong)雙面不干膠粘貼在藍牙耳機內部合(he)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出(chu)(chu)電壓(ya)與標(biao)稱值相差很大，一定要實測輸出(chu)(chu)電壓(ya)是否在上述(shu)范圍之(zhi)內。

　　由于這樣修理(li)后(hou)鋰(li)電(dian)(dian)池并沒有(you)恢復(fu)放電(dian)(dian)保護功能，使用(yong)中可能會因過放電(dian)(dian)影(ying)響鋰(li)電(dian)(dian)池的壽(shou)命，因此(ci)使用(yong)中要注意電(dian)(dian)池放完電(dian)(dian)后(hou)應及時充(chong)電(dian)(dian)，不要在低電(dian)(dian)壓下(xia)長時間擱(ge)置，最好不要等電(dian)(dian)量耗盡再(zai)充(chong)電(dian)(dian)，當工作中藍(lan)牙耳機發(fa)出“嘀嘀”提示(shi)音時就要及時充(chong)電(dian)(dian)。當然，這是應急使用(yong)的方法，能買到相近規格的鋰(li)電(dian)(dian)池直接代換(huan)最好。