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格力KFR—25GW空调器不工作

文章出处:武汉格力空调维修中心    发布时间:2014-06-11 15:20:38    点击:

众彩网GELIKFR—25GWKONGDIAOQIBUGONGZUO

GUZHANGXIANXIANG:SHIYONGKONGKONGQIBUNENGKAIJI。

JIANCEYUPANDUAN:KONGDIAOQIZHONGDEYAOKONGDIANLUZHUYAOYOUSANGEBUFENZUCHENG,JIYAOKONGFASHEQI、YAOKONGJIESHOUQIHEDIANNAOBANSHANGZHONGYANGCHULIDANYUANcPu(YAOKONGXINHAOCHULIDIANLU)。DANGCHUXIANGUZHANGSHI,YINGJISHUNXUJINXINGJIANCHA。TONGCHANGSHIFASHEJUGUCHENJIAODUO.JIESHOUQIGUZHANGJIAOSHAO.cPuGUZHANGGENGSHAO。

众彩网WEIXIUFANGFA:PANDUANYAOKONGQISHIFOUZHENGCHANGFASHEDEFANGFAYOUXIAMIANJIZHONG

众彩网(1)TIDAIFA。JIANGZHENGCHANGDEYAOKONGQIZAIGUIDINGDEJULIHEJIAODUNEI、DUIZHUNEKONGJIESHOUGONGNENGZHENGCHANGDEWENXINGHAOKONGRUNQI,ZUOFASHESHIYAN,KONGDIAOQIYINGZHENGCHANGYUANXING。RUGUOTIAOKONGQISUNHUAI,KONGDIAOQIJIUBUNENGZHENGCHANGKAIJIHUOBUYUNXING。CIFAJIANDANYIXING、ZHIGUANKEKAO。

(2)电压法。首先检测主要工作点的静态电压,然后依次测量品振两端对地电压,集成块的输入端、拍出端电压、驱动晶体管和红外发射管各极电压.应符合规定要求。
众彩网 在按下遥控器按镀时,晶振两端至少有一端电压有较大的跳变,表明键盘电路工作.且振荡器能产生脉冲信号。反之.应检查振荡电路和键盘。

众彩网JIANCHAJIANFUDEFANGFA:CELIANGJICHENGKANJIANSHENXINHAOSHURUDUAN、SHUCHUDUANDEDIANYA.KANXIAOTXIANGYINGTIANSHISHIFOUYOUDIANYATIAOBIAN。RUGUOYOUTIAOBIAN,SHUOMINGJIANPANDIANLUZHENGCHANG,GUZHANGZAIZHENDANGDIANLU;RUGUOZAIANCHANGANYINSHI.JICHENGKUAIYUJIANPANXIANGLIANDEYINJIAOMEIYOUDIANYATIAOBIAN、YUANYINDUOSHILIUPANDIANLUZHONGYOUSHUIQI、FUWU。

(3)DIANLIUFA。YAOKONGQIZAIRENHEANJIANDOUBUXIAOXIASHI,JINGTAIZONGDIANLIUJIXIAO,YUEJIWEIAN。RUGUOHEXIACAI—‘JIANSHI,ZONGDIANLIUYUEWEI3nlA,ZHEIBIAOMINGYAOKONGQINENGQIZHEN,GONGZUOJIBENZHENGCHANG。RUGUOANXIAMOUJIANHOU,ZONGDIANLIUPIANLIJIAODAHUORENGSHIJIWEIAN,SHUOMINGYAOKONGQIYOUGUZHANG(CIFANGFASHIZAIDIANCHIGONGDIANZHENGCHANGQINGKUANGXIA)

(4)SHOUYINJIJIANCHAFA。ZHAOYITAIBANDAOTISHOUYINJI,JIANGPINLVDIAOZHIZHONGBOE5—650kHzZUOYOU(ZAIWUDIANTAIWEIZHISHANG),JIANGEKONGQIKAOJINSHOUYINJI,ANXIARENYIJIANSHI,SHOUYINJIFASHENG;KUCHIXUANJIAN.ZESHOUYINJIFACHU“DA、DA、DA”SHENGYIN,SHUOMINGYAOKONGQIZHENDANGHEJIANPANDIANLUZHENGCHANG,DANBUNENGSHUOMINGHONGWAIFASHEGUANHAOHUAI.RUGUOANXIAJIANSHIMEIYOUSHENGYIN,ZEBIAOMINGYAOKONGQIGONGZUOXIAOZHENGCHANG。


(5)示波器观察波形法。在上述检查都个能确定故障部位时、可以用示波器观察振荡波形和发射波形来判29f故障部位。例如,珍宝牌空洞器遥控发射电路巾.当按下某—校键时。芯片比的队脚。府商幅度为25v左右、周期22y‘的正弦波。在红外发射晋正极应纳B度1.5v左右的串行脉冲.由于这些脉冲只有征技键才发射与经现。所以要仔训观察。用不被器观察波形法具合直观、快速、正确的特点。


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