磁帶復讀機常見故障及排除方法

1、按鍵不能回彈

故障現象(xiang)：按(an)停止鍵時(shi)其他按(an)鍵不能彈起。

分析檢修：這說明(ming)回彈(dan)彈(dan)簧脫落或(huo)已按(an)(an)(an)下(xia)的(de)(de)按(an)(an)(an)鍵(jian)被卡住，可(ke)用(yong)(yong)手(shou)向(xiang)上試(shi)拔，若能彈(dan)起，說明(ming)該(gai)按(an)(an)(an)下(xia)的(de)(de)按(an)(an)(an)鍵(jian)回彈(dan)力(li)(li)不夠或(huo)者回彈(dan)時阻力(li)(li)過大(da)，此(ci)(ci)時分為兩種情(qing)況進行處理：若用(yong)(yong)力(li)(li)不大(da)可(ke)將(jiang)該(gai)按(an)(an)(an)鍵(jian)彈(dan)起，說明(ming)只是彈(dan)力(li)(li)不夠或(huo)完全沒(mei)什么彈(dan)力(li)(li)，此(ci)(ci)時拆下(xia)機芯重(zhong)裝或(huo)更(geng)換(huan)彈(dan)簧；若須用(yong)(yong)較大(da)的(de)(de)力(li)(li)才能將(jiang)按(an)(an)(an)鍵(jian)拉(la)出說明(ming)按(an)(an)(an)鍵(jian)本身有(you)一定阻力(li)(li)，此(ci)(ci)時應(ying)當(dang)檢查按(an)(an)(an)鍵(jian)連桿或(huo)機芯是否變(bian)形，根據實際情(qing)況細(xi)心予(yu)以校(xiao)正；如(ru)果(guo)用(yong)(yong)力(li)(li)也不能將(jiang)按(an)(an)(an)鍵(jian)拉(la)出，則大(da)多(duo)是鎖片(pian)(pian)沒(mei)有(you)釋放(fang)；用(yong)(yong)力(li)(li)推動鎖片(pian)(pian)后若按(an)(an)(an)鍵(jian)能彈(dan)起，說明(ming)鎖片(pian)(pian)位移不夠，這種,I青況多(duo)是因為鎖片(pian)(pian)斜(xie)面(mian)被磨損所致，應(ying)修整斜(xie)面(mian)或(huo)予(yu)以更(geng)換(huan)鎖片(pian)(pian)。

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2、按鍵不能按下

故(gu)障現象：停止鍵、放音(yin)鍵、快進、快倒鍵中一個或(huo)多個不(bu)能按下。

分析檢修：如果全部按(an)(an)(an)鍵(jian)不(bu)(bu)能按(an)(an)(an)下，原因是鎖(suo)片(pian)不(bu)(bu)能移動；如果是某個(ge)按(an)(an)(an)鍵(jian)按(an)(an)(an)不(bu)(bu)下，則大多數情況下因為該按(an)(an)(an)鍵(jian)所接(jie)觸鎖(suo)片(pian)斜面不(bu)(bu)平滑所致。

3、不走帶

故障現象：裝入磁帶按下放音鍵(jian)后磁帶不動，但耳(er)機(ji)中可聽到靜(jing)態(tai)電流聲(sheng)。

分析檢修：耳機中有電(dian)(dian)流聲，說明復讀機電(dian)(dian)源部分正常；磁(ci)帶不走動的原因可(ke)能是主(zhu)導軸及傳動輪被卡(ka)死、皮帶脫落或斷開、電(dian)(dian)機不轉等。

首先(xian)觀察主(zhu)導軸上(shang)是(shi)否有殘留磁(ci)帶(dai)(dai)(dai)絞纏，如(ru)有即予以清除(chu)；打開機(ji)(ji)殼后蓋，觀察皮帶(dai)(dai)(dai)是(shi)否有斷裂或脫落現象，如(ru)無，則(ze)上(shang)電(dian)(dian)后用(yong)手緩緩撥(bo)動(dong)主(zhu)導軸飛輪，觀察電(dian)(dian)機(ji)(ji)是(shi)否轉動(dong)。如(ru)不轉動(dong)則(ze)可用(yong)萬用(yong)表檢(jian)查(cha)驅動(dong)電(dian)(dian)壓，若(ruo)電(dian)(dian)壓正常則(ze)須(xu)檢(jian)修電(dian)(dian)機(ji)(ji)穩速(su)電(dian)(dian)路或供電(dian)(dian)電(dian)(dian)路；如(ru)果(guo)電(dian)(dian)機(ji)(ji)轉動(dong)正常而又不走帶(dai)(dai)(dai)，傳動(dong)機(ji)(ji)構正常阻(zu)力不大，則(ze)需(xu)更換傳動(dong)皮帶(dai)(dai)(dai)。

4、按鍵不能自鎖

故(gu)障(zhang)現象：機芯(xin)各按鍵(jian)能(neng)按下但(dan)不能(neng)鎖定(ding)，即放開手后鍵(jian)隨之彈起。

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芯鎖片彈簧脫(tuo)落、鎖片不能(neng)復位、機芯變形、鎖片脫(tuo)位等。

首先仔細(xi)觀(guan)察機(ji)(ji)芯(xin)鎖(suo)片(pian)(pian)的彈簧是(shi)(shi)否脫落，然后(hou)上(shang)下移動(dong)鎖(suo)片(pian)(pian)觀(guan)察運(yun)轉是(shi)(shi)否靈活(huo)，如果(guo)能(neng)移動(dong)但不靈活(huo)可適當加點縫紉機(ji)(ji)油進行潤滑；如果(guo)不能(neng)移動(dong)鎖(suo)片(pian)(pian)，則說明有雜物卡(ka)住或嚴重錯位，應(ying)在記清機(ji)(ji)芯(xin)鎖(suo)片(pian)(pian)結構位置特(te)點（并(bing)在紙上(shang)畫下草圖(tu)）后(hou)拆下鎖(suo)片(pian)(pian)重新(xin)組(zu)裝，組(zu)裝并(bing)檢查無誤后(hou)一般都能(neng)順(shun)利解決問題(ti)。