常見故障分(fen)析1、通電(dian)(dian)源(yuan)開(kai)機(ji)(ji)后(hou)，控(kong)制(zhi)面(mian)板(ban)(ban)顯(xian)示正常(chang)，降溫風(feng)扇工(gong)作正常(chang)，按下啟動(dong)鍵時，中間繼(ji)電(dian)(dian)器工(gong)作，離心機(ji)(ji)不工(gong)作。根據故(gu)(gu)(gu)障現象分析，電(dian)(dian)源(yuan)部分和控(kong)制(zhi)部分應該正常(chang)，故(gu)(gu)(gu)障應該在控(kong)制(zhi)板(ban)(ban)到(dao)電(dian)(dian)機(ji)(ji)的(de)線路、碳(tan)(tan)刷(shua)(shua)和電(dian)(dian)機(ji)(ji)處。打開(kai)離心機(ji)(ji)，用萬用表測量控(kong)制(zhi)板(ban)(ban)到(dao)碳(tan)(tan)刷(shua)(shua)處線路導通，再測量碳(tan)(tan)刷(shua)(shua)到(dao)電(dian)(dian)機(ji)(ji)轉子時不導通，仔細觀察碳(tan)(tan)刷(shua)(shua)與電(dian)(dian)機(ji)(ji)轉子接觸不良(liang)，拆下碳(tan)(tan)刷(shua)(shua)發(fa)現由(you)于(yu)使用時間過長，太短造成。更換(huan)新(xin)的(de)碳(tan)(tan)刷(shua)(shua)，故(gu)(gu)(gu)障排除。這(zhe)種故(gu)(gu)(gu)障為離心機(ji)(ji)常(chang)見(jian)故(gu)(gu)(gu)障，要定期更換(huan)碳(tan)(tan)刷(shua)(shua)，以(yi)免發(fa)生以(yi)上故(gu)(gu)(gu)障。
2、通電(dian)(dian)(dian)(dian)源開(kai)機(ji)后(hou)，控制(zhi)(zhi)面板顯(xian)示(shi)正(zheng)常，降(jiang)溫風扇工(gong)(gong)作(zuo)正(zheng)常，按(an)下啟(qi)動(dong)鍵時，中間(jian)繼電(dian)(dian)(dian)(dian)器(qi)不(bu)工(gong)(gong)作(zuo)，離(li)心機(ji)不(bu)工(gong)(gong)作(zuo)。根據故(gu)障現(xian)(xian)象(xiang)分析，電(dian)(dian)(dian)(dian)源部分應該(gai)正(zheng)常，故(gu)障應該(gai)在(zai)控制(zhi)(zhi)板和到電(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)線(xian)(xian)路、碳刷和電(dian)(dian)(dian)(dian)機(ji)處。打(da)開(kai)離(li)心機(ji)，用(yong)(yong)萬(wan)用(yong)(yong)表(biao)測量控制(zhi)(zhi)板到碳刷處線(xian)(xian)路導通，再測量碳刷到電(dian)(dian)(dian)(dian)機(ji)轉子也導通，測量電(dian)(dian)(dian)(dian)機(ji)線(xian)(xian)圈正(zheng)常。開(kai)機(ji)后(hou)，用(yong)(yong)萬(wan)用(yong)(yong)表(biao)測量控制(zhi)(zhi)板到電(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)導線(xian)(xian)無電(dian)(dian)(dian)(dian)壓(ya)輸出，可判斷故(gu)障應在(zai)控制(zhi)(zhi)板上(shang)，其中中間(jian)繼電(dian)(dian)(dian)(dian)器(qi)不(bu)工(gong)(gong)作(zuo)，故(gu)障應在(zai)控制(zhi)(zhi)中間(jian)繼電(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)控制(zhi)(zhi)電(dian)(dian)(dian)(dian)路上(shang)，逐(zhu)一排除，發現(xian)(xian)控制(zhi)(zhi)板上(shang)C9013三極管擊穿(chuan)，更壞新的(de)(de)(de)C9013三極管，故(gu)障排除。
3、通電源開(kai)(kai)機(ji)(ji)后(hou)，控(kong)(kong)(kong)制(zhi)(zhi)(zhi)面(mian)板(ban)(ban)(ban)顯示正(zheng)(zheng)(zheng)常，按下啟動鍵時(shi)(shi)，離心機(ji)(ji)工作正(zheng)(zheng)(zheng)常。但按停(ting)(ting)(ting)止(zhi)開(kai)(kai)關時(shi)(shi)，離心機(ji)(ji)無反映，不能(neng)停(ting)(ting)(ting)止(zhi)工作。根據故(gu)障(zhang)現(xian)象(xiang)分(fen)(fen)析(xi)，故(gu)障(zhang)應(ying)(ying)該在(zai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)電路部(bu)分(fen)(fen)中的停(ting)(ting)(ting)止(zhi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)部(bu)分(fen)(fen)，其包括停(ting)(ting)(ting)止(zhi)開(kai)(kai)關、電源控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)及計(ji)時(shi)(shi)器(qi)(qi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)。打開(kai)(kai)離心機(ji)(ji)，用(yong)萬(wan)用(yong)表檢測停(ting)(ting)(ting)止(zhi)開(kai)(kai)關，為正(zheng)(zheng)(zheng)常； 開(kai)(kai)機(ji)(ji)后(hou)測量電源控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)輸(shu)出到計(ji)時(shi)(shi)器(qi)(qi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)信號(hao)為交流16V正(zheng)(zheng)(zheng)常，故(gu)障(zhang)應(ying)(ying)在(zai)計(ji)時(shi)(shi)器(qi)(qi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)上，計(ji)時(shi)(shi)器(qi)(qi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)得(de)到停(ting)(ting)(ting)止(zhi)信號(hao)不能(neng)執行停(ting)(ting)(ting)止(zhi)任(ren)務(wu)。逐一(yi)排除，發現(xian)計(ji)時(shi)(shi)器(qi)(qi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板(ban)(ban)(ban)上C9013三(san)極管(guan)和型號(hao)為16V，470μF的電容(rong)擊穿，更壞(huai)新的三(san)極管(guan)和電容(rong)，故(gu)障(zhang)排除。
4、通電(dian)(dian)源開機(ji)(ji)后(hou)，控(kong)制(zhi)(zhi)(zhi)面(mian)板顯示正(zheng)常，按(an)下啟(qi)動(dong)鍵(jian)時，離心機(ji)(ji)工作(zuo)正(zheng)常。但按(an)停止開關時，離心機(ji)(ji)不能馬上停止工作(zuo)，而是旋(xuan)轉好長(chang)時間(jian)(jian)才(cai)慢慢停下來。根據(ju)故障現象(xiang)分(fen)析，故障應該(gai)在控(kong)制(zhi)(zhi)(zhi)電(dian)(dian)路(lu)部分(fen)中的(de)停止制(zhi)(zhi)(zhi)動(dong)控(kong)制(zhi)(zhi)(zhi)部分(fen)，其制(zhi)(zhi)(zhi)動(dong)控(kong)制(zhi)(zhi)(zhi)部分(fen)包括(kuo)型(xing)號(hao)為：WJ176-12V中間(jian)(jian)繼(ji)電(dian)(dian)器、剎車電(dian)(dian)阻R：20－30Ω、型(xing)號(hao)為：KBPC50A10M硅(gui)堆和導線。打開離心機(ji)(ji)，用萬用表(biao)測量(liang)剎車電(dian)(dian)阻、中間(jian)(jian)繼(ji)電(dian)(dian)器及導線均(jun)為正(zheng)常，開機(ji)(ji)后(hou)，按(an)停止鍵(jian)后(hou)用萬用表(biao)測量(liang)硅(gui)堆4角，有交流(liu)12V輸(shu)入，無直流(liu)12V輸(shu)出(chu)，判斷該(gai)硅(gui)堆壞，更(geng)換新的(de)，故障排(pai)除。
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