1、上電(dian)(dian)無(wu)反應，保(bao)險管(guan)熔斷檢查門(men)開關、微波高(gao)壓系統(高(gao)壓變壓器、高(gao)壓二極管(guan)、磁控管(guan)、高(gao)壓電(dian)(dian)容)、風扇(shan)電(dian)(dian)機(ji)、轉(zhuan)盤電(dian)(dian)機(ji)。在(zai)排除故障(zhang)后，可換(huan)上保(bao)險管(guan)試機(ji)。

2、上電無反應，保險管(guan)未損壞

機(ji)械(xie)控(kong)鋪式微(wei)波(bo)爐二可檢(jian)查(cha)機(ji)械(xie)定時器(qi)(qi)、磁(ci)控(kong)管限溫器(qi)(qi)。電(dian)腦(nao)控(kong)制微(wei)波(bo)爐：觀(guan)察電(dian)腦(nao)板(ban)的保(bao)(bao)險(xian)管，檢(jian)查(cha)電(dian)腦(nao)板(ban)上(shang)電(dian)源變(bian)壓器(qi)(qi)、磁(ci)控(kong)管限溫保(bao)(bao)護器(qi)(qi)。在排除故(gu)障后，可換上(shang)保(bao)(bao)險(xian)試(shi)機(ji)。

3、屢燒電源保險管(guan) 先檢查門開關、高(gao)(gao)壓變壓器(qi)，然(ran)后(hou)再檢 查微波(bo)系統中其他器(qi)件(jian)，如高(gao)(gao)壓二極管(guan)、高(gao)(gao) 壓電容(rong)、雙向二極管(guan)、磁控管(guan)等。

4、能運(yun)轉(zhuan)，但微波(bo)不加熱 先測量(liang)高壓(ya)(ya)變器(qi)(qi)(qi)(qi)初(chu)(chu)級(ji)有無供電(dian)，然后(hou)根 據測量(liang)結果確定檢(jian)修范圍。若測得高壓(ya)(ya)變壓(ya)(ya) 器(qi)(qi)(qi)(qi)初(chu)(chu)級(ji)無AC220V供電(dian)，機(ji)械(xie)控(kong)(kong)制微波(bo)爐，應(ying) 檢(jian)查(cha)(cha)定時器(qi)(qi)(qi)(qi)、門(men)開(kai)關;電(dian)腦(nao)控(kong)(kong)制微波(bo)爐，應(ying)檢(jian) 查(cha)(cha)門(men)開(kai)關、電(dian)腦(nao)板火(huo)力繼(ji)電(dian)器(qi)(qi)(qi)(qi)及驅動三極管。若測得高壓(ya)(ya)變器(qi)(qi)(qi)(qi)初(chu)(chu)級(ji)有AC220V電(dian)源， 則(ze)檢(jian)查(cha)(cha)高壓(ya)(ya)變壓(ya)(ya)器(qi)(qi)(qi)(qi)、高壓(ya)(ya)保(bao)(bao)險、高壓(ya)(ya)二(er)(er)極管、保(bao)(bao)護二(er)(er)極管。

5、微波不加熱，噪(zao)聲增大(da)或震(zhen)動大(da)、 重點(dian)檢查微波系統，如高壓二(er)極(ji)管(guan)、高 壓變壓器、高壓電容、雙向二(er)極(ji)管(guan)、磁控(kong)管(guan)。

6、微波加熱慢，火力較以前(qian)明顯(xian)減小此(ci)故(gu)障通常是磁(ci)控管老化(hua)，少數是功率 控制(zhi)選(xuan)擇開關(guan)或功率繼電器觸點不良。

7、燒(shao)烤(kao)不加熱 檢查(cha)燒(shao)烤(kao)器(qi)有(you)無AC220V供(gong)電(dian)(dian)。如果供(gong) 龜正(zheng)常，更換燒(shao)烤(kao)管;如果沒(mei)有(you)供(gong)電(dian)(dian)電(dian)(dian)壓，檢查(cha)燒(shao)烤(kao)控(kong)制(zhi)電(dian)(dian)路，如燒(shao)烤(kao)限溫保護器(qi)、燒(shao)烤(kao) t開關(有(you)的機械控(kong)制(zhi)式(shi)微(wei)波(bo)爐設置在火力控(kong) ，麓器(qi)內)，對于(yu)電(dian)(dian)腦控(kong)制(zhi)式(shi)微(wei)波(bo)爐、還要檢查(cha)烤(kao)繼電(dian)(dian)器(qi)及驅動三極管等(deng)元件。

8、開機后內膽打火(huo)，在確認(ren)用(yong)戶(hu)沒有使用(yong)金屬器(qi)皿的情況(kuang)下，檢查(cha)云母片(pian)是(shi)否(fou)燒焦(jiao)，內膽是(shi)否(fou)太潮濕。

9、啟動或停止鍵失靈

一般見于電(dian)腦控制(zhi)式微(wei)波爐，檢查薄膜開關。

10、電(dian)(dian)腦式微波爐上(shang)電(dian)(dian)有顯示(shi)，但不啟動檢(jian)查門(men)開關和(he)面板上(shang)開關。