一只μVisiON（優威信）ZL600立(li)體聲藍牙耳機，故障(zhang)為(wei)不能(neng)開機，充不進電。

　　用小(xiao)一字儀表(biao)改錐沿外(wai)殼(ke)面板(ban)接縫細心撬開正(zheng)面蓋板(ban)，再小(xiao)心取(qu)出(chu)電路板(ban)和內部電池。

　　注(zhu)意：電路(lu)板與外殼問有兩處用(yong)膠粘接(jie)，要用(yong)小―字改錐細心撥(bo)開；麥克風、發聲單(dan)元都用(yong)膠固定(ding)在外殼上(shang)了，輕拉出電路(lu)板到(dao)―定(ding)位置就行(xing)了，注(zhu)意別拽斷引(yin)線(xian)。

　　故障分(fen)析：這款藍牙(ya)耳機使用(yong)了容量為(wei)(wei)l00mAh的(de)鋰(li)聚合物電(dian)(dian)(dian)池(chi)(chi)，鋰(li)電(dian)(dian)(dian)池(chi)(chi)帶(dai)有充放電(dian)(dian)(dian)保(bao)(bao)護(hu)板(ban)。測(ce)量鋰(li)電(dian)(dian)(dian)池(chi)(chi)輸出電(dian)(dian)(dian)壓(ya)為(wei)(wei)0．4V左右，用(yong)5V電(dian)(dian)(dian)源充電(dian)(dian)(dian)，測(ce)得(de)充電(dian)(dian)(dian)電(dian)(dian)(dian)流為(wei)(wei)零。剝開(kai)(kai)包在鋰(li)電(dian)(dian)(dian)池(chi)(chi)保(bao)(bao)護(hu)板(ban)外層的(de)絕緣膠皮，測(ce)得(de)鋰(li)電(dian)(dian)(dian)心的(de)電(dian)(dian)(dian)壓(ya)為(wei)(wei)1.05V，說明鋰(li)電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)壓(ya)太(tai)低(di)(di)，已經(jing)低(di)(di)于保(bao)(bao)護(hu)板(ban)的(de)充電(dian)(dian)(dian)開(kai)(kai)啟電(dian)(dian)(dian)壓(ya)，保(bao)(bao)護(hu)板(ban)起保(bao)(bao)護(hu)作用(yong)，斷開(kai)(kai)了充電(dian)(dian)(dian)回路。

　　于(yu)是用外(wai)接(jie)5V電(dian)(dian)(dian)(dian)源串聯33Ω電(dian)(dian)(dian)(dian)阻直接(jie)對(dui)鋰(li)電(dian)(dian)(dian)(dian)心充(chong)(chong)電(dian)(dian)(dian)(dian)，測(ce)得充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)從100mA逐漸下(xia)降，鋰(li)電(dian)(dian)(dian)(dian)心的(de)端電(dian)(dian)(dian)(dian)壓逐漸上升，當上升到3V左右(you)時停止外(wai)接(jie)充(chong)(chong)電(dian)(dian)(dian)(dian)，使用原機配的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)線插人(ren)藍牙耳機的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)插口，這時可(ke)以正常充(chong)(chong)電(dian)(dian)(dian)(dian)了(le)！將鋰(li)電(dian)(dian)(dian)(dian)心和保(bao)護板用絕(jue)緣(yuan)膠皮包好(hao)，裝回耳機內部，按原樣恢(hui)復藍牙耳機，正常充(chong)(chong)電(dian)(dian)(dian)(dian)，雨個多小時后充(chong)(chong)滿電(dian)(dian)(dian)(dian)，可(ke)以正常使用了(le)。

　　本(ben)以為(wei)這個藍牙耳機修復成功了(le)，于(yu)是(shi)用(yong)其聽歌試用(yong)，2個多小時后電量耗盡(jin)自動關機，再測試又(you)回(hui)到了(le)原來的(de)故障狀態(tai)：既不能開(kai)機也充不進電，又(you)處于(yu)保護(hu)狀杰。

　　綜(zong)合分析：鋰電(dian)(dian)池(chi)(chi)保(bao)護(hu)(hu)板(ban)的(de)(de)放電(dian)(dian)保(bao)護(hu)(hu)功(gong)能失(shi)效，放電(dian)(dian)終止電(dian)(dian)壓低(di)于充電(dian)(dian)開啟(qi)電(dian)(dian)壓。可(ke)(ke)以選擇(ze)的(de)(de)修復方案(an)有：（1）更換新的(de)(de)帶保(bao)護(hu)(hu)板(ban)的(de)(de)鋰電(dian)(dian)池(chi)(chi)。但一時(shi)很難(nan)買(mai)到(dao)容量相(xiang)近、尺寸(cun)相(xiang)符(fu)的(de)(de)鋰電(dian)(dian)池(chi)(chi)；（2）保(bao)留鋰電(dian)(dian)心，更換鋰電(dian)(dian)保(bao)護(hu)(hu)板(ban)。可(ke)(ke)從淘汰的(de)(de)或損壞的(de)(de)舊MP3內(nei)部的(de)(de)鋰電(dian)(dian)池(chi)(chi)上拆下大小(xiao)合適(shi)的(de)(de)鋰電(dian)(dian)保(bao)護(hu)(hu)板(ban)換上，但這條途徑也有困(kun)難(nan)。在(zai)上述兩種方法(fa)都(dou)難(nan)以實現的(de)(de)情況下，我采用了如圖所示的(de)(de)應急方法(fa)進(jin)行維(wei)修。

　　修(xiu)理方法：圖中虛線方框中為鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)板內部示意圖，經檢查，這個(ge)藍牙(ya)耳機(ji)的(de)(de)鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)板在鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)負(fu)極充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中有一個(ge)無觸點(dian)開(kai)(kai)關(guan)，鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)板通(tong)過這個(ge)無觸點(dian)開(kai)(kai)關(guan)的(de)(de)通(tong)、斷來對鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)起(qi)充、放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)保(bao)(bao)護(hu)作用(yong)。現在鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)保(bao)(bao)護(hu)板的(de)(de)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)倮護(hu)功能失效，放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)終止(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓低于(yu)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)開(kai)(kai)啟電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓，導致無法充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，為此，用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)R和發(fa)光二極管D串(chuan)聯后再(zai)并接到這個(ge)無觸點(dian)開(kai)(kai)關(guan)的(de)(de)兩側（即鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)保(bao)(bao)護(hu)板的(de)(de)負(fu)極引出線與鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)負(fu)極之間），為鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)搭建負(fu)極輔助充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)。發(fa)光二極管D選(xuan)用(yong)導通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓1．5V～2．0V的(de)(de)紅色(se)或(huo)綠(lv)色(se)貼片LED，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)R起(qi)限(xian)流作用(yong)，可選(xuan)用(yong)100Ω左右的(de)(de)貼片電(dian)(dian)(dian)(dian)(dian)(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)(chong)電：隨著(zhu)充(chong)(chong)(chong)電的(de)進(jin)行，鋰(li)電池(chi)(chi)電壓(ya)逐漸上升達到(dao)鋰(li)電保(bao)護板(ban)(ban)的(de)充(chong)(chong)(chong)電開啟電壓(ya)時(shi)(shi)，鋰(li)電保(bao)護板(ban)(ban)內(nei)部的(de)無(wu)觸(chu)點(dian)開關導通(tong)，鋰(li)電池(chi)(chi)進(jin)人(ren)正(zheng)常充(chong)(chong)(chong)電狀態(tai)；當鋰(li)電池(chi)(chi)充(chong)(chong)(chong)電到(dao)約(yue)3．7V（實(shi)測）時(shi)(shi)，發光二極(ji)(ji)管(guan)D截止(zhi)，電阻R和發光二極(ji)(ji)管(guan)D串聯(lian)構(gou)成的(de)負極(ji)(ji)輔(fu)助充(chong)(chong)(chong)電電路斷(duan)開，但這時(shi)(shi)鋰(li)電保(bao)護板(ban)(ban)維持(chi)對鋰(li)電池(chi)(chi)充(chong)(chong)(chong)電；當鋰(li)電池(chi)(chi)充(chong)(chong)(chong)滿(man)時(shi)(shi)（約(yue)4．2V），鋰(li)電保(bao)護板(ban)(ban)內(nei)部的(de)無(wu)觸(chu)點(dian)開關斷(duan)開，起到(dao)充(chong)(chong)(chong)滿(man)保(bao)護作用。

　　由于(yu)電阻R和發光(guang)二極管D這兩(liang)個貼(tie)片元件體積很小，將它們串(chuan)聯焊(han)在(zai)一起，并聯到鋰電池(chi)保護板(ban)上后可以直接放在(zai)保護板(ban)邊上，也可以用細導線引出來用雙面不干膠粘貼(tie)在(zai)藍牙耳機(ji)內部(bu)合適的位置。

　　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(dian)壓(ya)與標稱值相(xiang)差(cha)很大，一(yi)定要實測輸(shu)出電(dian)壓(ya)是否(fou)在上述(shu)范圍之內(nei)。

　　由于這樣(yang)修理后鋰(li)(li)電(dian)(dian)(dian)池(chi)(chi)并沒有恢復(fu)放電(dian)(dian)(dian)保護功能(neng)，使用(yong)(yong)中(zhong)可能(neng)會因過放電(dian)(dian)(dian)影響鋰(li)(li)電(dian)(dian)(dian)池(chi)(chi)的壽(shou)命(ming)，因此(ci)使用(yong)(yong)中(zhong)要注意電(dian)(dian)(dian)池(chi)(chi)放完電(dian)(dian)(dian)后應(ying)及時充電(dian)(dian)(dian)，不要在低電(dian)(dian)(dian)壓下長時間擱置(zhi)，最(zui)好不要等電(dian)(dian)(dian)量耗盡(jin)再充電(dian)(dian)(dian)，當工作中(zhong)藍牙耳機發出“嘀嘀”提示音(yin)時就要及時充電(dian)(dian)(dian)。當然，這是應(ying)急(ji)使用(yong)(yong)的方法，能(neng)買到相(xiang)近規格的鋰(li)(li)電(dian)(dian)(dian)池(chi)(chi)直接代換最(zui)好。