磁帶復讀機常見故障及排除方法
1、按鍵不能回彈
故障現(xian)象:按停止鍵(jian)時其(qi)他按鍵(jian)不能(neng)彈起。
分析檢修:這說(shuo)(shuo)明(ming)(ming)回(hui)彈(dan)彈(dan)簧脫(tuo)落或(huo)(huo)(huo)已按下(xia)的按鍵(jian)被(bei)卡住(zhu),可用(yong)(yong)(yong)手向上試拔(ba),若(ruo)能(neng)彈(dan)起(qi),說(shuo)(shuo)明(ming)(ming)該(gai)按下(xia)的按鍵(jian)回(hui)彈(dan)力(li)不夠(gou)或(huo)(huo)(huo)者回(hui)彈(dan)時阻(zu)力(li)過大,此時分為兩(liang)種情況進行(xing)處(chu)理:若(ruo)用(yong)(yong)(yong)力(li)不大可將(jiang)該(gai)按鍵(jian)彈(dan)起(qi),說(shuo)(shuo)明(ming)(ming)只是彈(dan)力(li)不夠(gou)或(huo)(huo)(huo)完全沒什么彈(dan)力(li),此時拆下(xia)機芯重裝或(huo)(huo)(huo)更(geng)換彈(dan)簧;若(ruo)須用(yong)(yong)(yong)較大的力(li)才能(neng)將(jiang)按鍵(jian)拉出說(shuo)(shuo)明(ming)(ming)按鍵(jian)本身有(you)一(yi)定阻(zu)力(li),此時應當檢查按鍵(jian)連桿或(huo)(huo)(huo)機芯是否變形,根(gen)據實(shi)際情況細心予(yu)以校正(zheng);如果用(yong)(yong)(yong)力(li)也不能(neng)將(jiang)按鍵(jian)拉出,則大多是鎖片沒有(you)釋放(fang);用(yong)(yong)(yong)力(li)推動鎖片后若(ruo)按鍵(jian)能(neng)彈(dan)起(qi),說(shuo)(shuo)明(ming)(ming)鎖片位移不夠(gou),這種,I青況多是因為鎖片斜面被(bei)磨損(sun)所致,應修整斜面或(huo)(huo)(huo)予(yu)以更(geng)換鎖片。
2、按鍵不能按下
故障現象(xiang):停止(zhi)鍵(jian)、放(fang)音鍵(jian)、快(kuai)進、快(kuai)倒鍵(jian)中一個(ge)或多(duo)個(ge)不(bu)能按下。
分(fen)析檢修:如果(guo)(guo)全部按(an)鍵(jian)不(bu)能(neng)按(an)下,原因是鎖(suo)片(pian)不(bu)能(neng)移動;如果(guo)(guo)是某個按(an)鍵(jian)按(an)不(bu)下,則大(da)多數情況下因為該按(an)鍵(jian)所接(jie)觸鎖(suo)片(pian)斜面不(bu)平(ping)滑所致。
3、不走帶
故障現(xian)象:裝入磁帶按下放音鍵后磁帶不動,但耳機中可聽到(dao)靜(jing)態(tai)電流聲。
分析檢修:耳機中有電(dian)流聲,說明(ming)復讀機電(dian)源部分正常;磁(ci)帶不走動(dong)的原因可能是(shi)主導軸及傳動(dong)輪被(bei)卡死(si)、皮帶脫(tuo)落或斷開、電(dian)機不轉等。
首先觀(guan)察主(zhu)導(dao)軸(zhou)上(shang)是否有(you)殘留磁帶(dai)絞纏,如(ru)(ru)有(you)即予以清除(chu);打開機(ji)(ji)(ji)殼后(hou)蓋,觀(guan)察皮(pi)帶(dai)是否有(you)斷裂或(huo)(huo)脫(tuo)落現象,如(ru)(ru)無,則(ze)(ze)上(shang)電(dian)(dian)后(hou)用手緩緩撥動(dong)(dong)(dong)(dong)主(zhu)導(dao)軸(zhou)飛輪,觀(guan)察電(dian)(dian)機(ji)(ji)(ji)是否轉動(dong)(dong)(dong)(dong)。如(ru)(ru)不轉動(dong)(dong)(dong)(dong)則(ze)(ze)可用萬用表檢查驅動(dong)(dong)(dong)(dong)電(dian)(dian)壓,若電(dian)(dian)壓正(zheng)(zheng)常則(ze)(ze)須檢修電(dian)(dian)機(ji)(ji)(ji)穩速電(dian)(dian)路或(huo)(huo)供電(dian)(dian)電(dian)(dian)路;如(ru)(ru)果電(dian)(dian)機(ji)(ji)(ji)轉動(dong)(dong)(dong)(dong)正(zheng)(zheng)常而又(you)不走帶(dai),傳(chuan)動(dong)(dong)(dong)(dong)機(ji)(ji)(ji)構正(zheng)(zheng)常阻力不大(da),則(ze)(ze)需更換傳(chuan)動(dong)(dong)(dong)(dong)皮(pi)帶(dai)。
4、按鍵不能自鎖
故障(zhang)現象:機芯各按鍵能(neng)按下(xia)但不(bu)能(neng)鎖定,即(ji)放開手后(hou)鍵隨之彈起(qi)。
分析檢修:按鍵不能鎖定,多為機芯鎖片原因所致。常見情況是復讀機機(ji)芯(xin)鎖片(pian)彈簧脫(tuo)落、鎖片(pian)不能(neng)復位(wei)、機(ji)芯(xin)變形(xing)、鎖片(pian)脫(tuo)位(wei)等。
首先(xian)仔細觀(guan)(guan)察機(ji)(ji)芯鎖片(pian)的彈簧是否脫(tuo)落,然后上下(xia)移(yi)動鎖片(pian)觀(guan)(guan)察運轉是否靈活,如果(guo)(guo)能(neng)移(yi)動但不靈活可適(shi)當加點(dian)縫(feng)紉機(ji)(ji)油進行潤(run)滑;如果(guo)(guo)不能(neng)移(yi)動鎖片(pian),則說明有(you)雜物卡住或嚴重錯位,應在(zai)記清機(ji)(ji)芯鎖片(pian)結構位置特(te)點(dian)(并(bing)在(zai)紙上畫下(xia)草圖)后拆下(xia)鎖片(pian)重新組(zu)裝(zhuang),組(zu)裝(zhuang)并(bing)檢查無誤后一般(ban)都(dou)能(neng)順利解決問題。
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