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足球彩票 > 新闻资讯 > PCB专栏 > 如何检查PCB上的短路

如何检查PCB上的短路

发表时间:2019-10-18     责任编辑:恒天伟业科技

  每个工程师都有这种“最坏的情况”,尽管他们幸免于难,但他们坚持设计。在我职业生涯中最糟糕的一周里,我们收到了一批过期的PCB足球彩票。这些PCB应该在一个多月前已安装在硬件中,并已在客户现场部署。我们感到有点沮丧。

  BUYONGSHUO,YOUXIEJIYUCHUHUOZHEIXIEXINZHUBAN。YIDANWOMENWEITAMENJIADIANJINXINGCESHI,NINJIUKEYIWENDAOBANZISHANGSANFACHUDECHOUYANG。ZUIANGGUIDEZUJIANZHIYIBEIJIAREDERUCIZHIGAO,YIZHIYUSHIJISHANGSHAOSHANGLEYIXIERENJINXING“CHUMOCESHI”。WOMENRENWEI,WOMENMEIYOUSHIJIANQUHUODEYIPICESHIBAN,ERZHISHIDINGGOULEZUZHUANGHAODEPCB 。

足球彩票  CHULEXIANERYIJIANDECUOBAIGAN,XIANGLAOBANJIESHIZHUYAODEYINGJIANGUZHANG,TONGSHISHUNXIRANSHAODESHOUZHISHININKENENGYUDAODEZUIZAOGAODEHUIYIZHIYI。NINNENGZUODEZUIHAODESHIQINGJIUSHITICHUYIGEJIHUA。RUGUONINYUDAOZHEIZHONGQINGKUANG,QINGANZHAOYIXIAFANGFAZAIPCBSHANGCHAZHAODUANLU。

  如何检查PCB中的短路

足球彩票  NINKEYICAIQUYIXIAYIXIEZHONGYAOBUZHOULAIJIANCHAPCBZHONGDEDUANLUQINGKUANG:

  BUZHOU1:RUHEZAIPCBZHONGFAXIANDUANLU

  BUZHOU2:RUHEZAIDIANZIBANSHANGCESHIDIANLUDUANLU

  BUZHOU3:RUHEZAIPCBSHANGCHAZHAOGUZHANGZUJIAN

足球彩票  BUZHOU4:RUHEPOHUAIXINGDICESHIPCB


  步骤1:如何在PCB中发现短路

  SHILIJIANCHA

足球彩票  DIYIBUSHIZIXIGUANCHAPCBDEZHENGGEBIAOMIAN。RUGUOYOU,QINGSHIYONGFANGDAJINGHUODIBEIXIANWEIJING。ZAIHANPANHUOHANDIANZHIJIANXUNZHAOXIXU。RENHEHANLIAODELIEWENHUOBANDIANDOUYINGYINQIZHUYI。JIANCHASUOYOUTONGKONG。RUGUOZHIDINGLEWEIDUTONGKONG,QINGQUEBAOBANZISHANGSHIZHEIZHONGQINGKUANG。DIANDUBULIANGDEGUOKONGHUIZAIGECENGZHIJIANZAOCHENGDUANLU,BINGSHININDESUOYOUDONGXIDOUJIEDI,VCCHUOLIANGZHEDOUBANGZAIYIQI。

足球彩票  RUGUODUANLUQUESHIHENYANZHONG,BINGQIEDAOZHIZUJIANDADAOLINJIEWENDU,ZESHIJISHANGNINHUIZAIYINSHUADIANLUBANSHANGKANDAOZHUOSHANGDEBANDIAN。TAMENKENENGHENXIAO,DANSHIHUIBIANCHENGZONGSE,ERBUSHIZHENGCHANGDELVSEZUHANJI。RUGUONINYOUDUOKUAIBAN,NEIMESHAOHUIDEPCBKEYIBANGZHUNINSUOXIAOTEDINGWEIZHIDEFANWEI,ERWUXUWEILINGYIKUAIBANGONGDIAN,YIMIANXISHENGSOUSUOFANWEI。BUXINGDESHI,WOMENDEDIANLUBANBENSHENMEIYOUSHAOSHANG,ZHISHIYUNQIBUHAODESHOUZHIJIANCHALEJICHENGDIANLUSHIFOUGUORE。

  MOUXIEDUANLUJIANGZAIDIANLUBANNEIBUFASHENG,BINGQIEBUHUICHANSHENGRANSHAODIAN。ZHEIYEYIWEIZHETAMENCONGBIAOCENGBUHUIBEIZHUYIDAO。ZAIZHEILI,NINJIANGXUYAOQITAFANGFALAIJIANCEPCBZHONGDEDUANLU。

  

如何从视觉上检测硬盘驱动器PCB中的短路


  HONGWAICHENGXIANG

  RUGUONINBUSHIGANGKAISHISHIYONGQIYINGJIANYUSUANBUZUDECHUCHUANGGONGSI,ZEKENENGHENXINGYUNNENGGOUSHIYONGHONGWAIREXIANGYI。SHIYONGHONGWAIREXIANGYIKEYIBANGZHUNINDINGWEICHANSHENGDALIANGRELIANGDEQUYU。RUGUOMEIYOUKANDAOYOUYUANZUJIANYUANLIREDIAN,NEIMEJISHIDUANLUFASHENGZAINEIBUCENGZHIJIAN,YEKENENGFASHENGPCBDUANLU。

足球彩票  DUANLUTONGCHANGBIPUTONGZOUXIANHUOHANDIANJUYOUGENGGAODEDIANZU,YINWEITAMEIYOUZAISHEJIZHONGJINXINGYOUHUADEHAOCHU(CHUFEININZHENDEHENXIANGHULVEGUIZEJIANCHA)。GAIDIANZUYIJIYOUYUDIANYUANHEDIZHIJIANDEZHIJIELIANJIEERCHANSHENGDEZIRANGAODIANLIU,YIWEIZHEPCBDUANLUZHONGDEDAOTIHUIFARE。CONGNINKEYISHIYONGDEZUIDIDIANLIUKAISHI。LIXIANGQINGKUANGXIA,NINHUIXIANKANDAODUANLU,RANHOUZAIZAOCHENGGENGDUOSUNHUAI。

  

如何在PCB上查找故障组件:手指测试


足球彩票  SHOUZHICESHISHIJIANCHATEDINGZUJIANSHIFOUGUOREDEYIZHONGFANGFA

  步骤2:如何在电子板上测试电路短路

  CHULEYONGKEXINLAIDEYANJINGJIANCHADIANLUBANDEDIYIBUZHIWAI,NINHAIKEYITONGGUOQITAJIZHONGFANGFALAICHAZHAODAOZHIPCBDUANLUDEQIANZAIYUANYIN。

  YONGSHUZIWANYONGBIAOCESHI

  YAOCESHIDIANLUBANSHIFOUDUANLU,XUYAOJIANCHADIANLUZHONGBUTONGDIANZHIJIANDEDIANZU。RUGUOMUSHIJIANCHAWEIFAXIANRENHEYOUGUANDUANLUWEIZHIHUOYUANYINDEXIANSUO,QINGZHUAZHUWANYONGBIAOBINGCHANGSHIZHUIZONGYINSHUADIANLUBANSHANGDEWULIWEIZHI。WANYONGBIAODEFANGFAZAIDADUOSHUDIANZILUNTANZHONGDOUSHOUDAOLEBUTONGDEPINGLUN,DANSHIGENZONGCESHIDIANKEYIBANGZHUNINZHAOCHUWENTISUOZAI。

足球彩票  NINJIANGXUYAOYIGEJUYOUHAOOULINGMINDUDEFEICHANGHAODEWANYONGBIAO,RUGUOTAJUYOUFENGMINGGONGNENGYIZAITANCEDUANLUSHIXIANGNINFACHUJINGBAO,ZHEISHIZUIJIANDANDE。LIRU,RUGUOCELIANGPCBSHANGXIANGLINZOUXIANHUOHANPANZHIJIANDEDIANZU,ZEYINGCELIANGGAODIANZU。

  RUGUOCELIANGYINGZAIDANDUDIANLUZHONGDELIANGGEDAOTIZHIJIANDEDIANZUFEICHANGDI,ZEKENENGHUIZAINEIBUHUOWAIBUQIAOJIEZHEILIANGGEDAOTI。QINGZHUYI,YONGDIANGANQIQIAOJIEDEXIANGLINLIANGGEZOUXIANHUOHANPAN(LIRUZAIZUKANGPIPEIWANGLUOHUOFENLILVBOQIDIANLUZHONG)JIANGCHANSHENGFEICHANGDIDEDIANZUDUSHU,YINWEIDIANGANQIZHISHIYIGEXIANQUANDAOTI。DANSHI,RUGUOBANSHANGDELIANGGEDAOTIXIANGJUHENYUAN,BINGQIENINDUQUDEDIANZUHENXIAO,NEIMEBANSHANGDEMOUCHUJIUHUIYOUYIGEQIAO。

  XIANGDUIYUDIMIANDECESHI

  TEBIEZHONGYAODESHISHEJIJIEDITONGKONGHUOJIEDICENGDEDUANLU。JUYOUNEIBUJIEDICENGDEDUOCENGPCBJIANGBAOKUOYITIAOTONGGUOGUOKONGFUJINZUJIANDEFANHUILUJING,ZHEIWEIJIANCHADIANLUBANBIAOMIANCENGSHANGDESUOYOUQITAGUOKONGHEHANPANTIGONGLEFANGBIANDEWEIZHI。JIANGYIGETANZHENFANGZAIJIEDILIANJIESHANG,BINGZAIBANSHANGQITADAOTISHANGCHUMOLINGYIGETANZHEN。

  BANSHANGDEQITAWEIZHIYEJIANGCUNZAIXIANGTONGDEJIEDILIANJIE,ZHEIYIWEIZHE,RUGUOJIANGMEIGETANZHENJIECHUDAOLIANGGEBUTONGDEJIEDIGUOKONG,ZEDUSHUJIANGHENXIAO。ZHIXINGCICAOZUOSHIQINGZHUYIBUJU,YINWEININBUXIANGJIANGDUANLUWURENWEISHIGONGGONGJIEDILIANJIE。SUOYOUQITAWEIJIEDIDELUOLUDAOTIZAIGONGGONGJIEDILIANJIEHEDAOTIBENSHENZHIJIANYINGJUYOUHENGAODEDIANZU。RUGUODUQUDEZHIHENDI,BINGQIESUOTAOLUNDEDAOTIYUDIMIANZHIJIANMEIYOUDIANGAN,ZEKENENGSHIZUJIANSUNHUAIHUODUANLU。

  

如何用万用表检查PCB中的短路


  WANYONGBIAOTANCEKEYIBANGZHUNINZHAODAODUANLUXIAN,DANSHITAMENBINGBUZONGSHIZUGOULINGMINYIZHAODAODUANLUXIAN。

  ZUJIANDUANLU

  JIANCHAZUJIANSHIFOUDUANLUHAISHEJISHIYONGWANYONGBIAOCELIANGDIANZU。RUGUOMUSHIJIANCHAWEIFAXIANHANPANZHIJIANYOUGUODUODEHANLIAOHUOJINSHUBOPIAN,ZEKENENGSHIZAIZUJIANSHANGLIANGGEHANPAN/YINJIAOZHIJIANDENEIBUCENGZHONGXINGCHENGDUANLU。YOUYUJIAGONGBULIANG,ZUJIANSHANGDEHANPAN/YINJIAOZHIJIANKENENGHUIFASHENGDUANLU。ZHEISHIPCBYINGGAIJINXINGDFMHESHEJIGUIZEJIANCHADEYUANYINZHIYI。TAIKAOJINDEHANPANHEGUOKONGKENENGHUIZAIZHIZAOGUOCHENGZHONGYIWAIQIAOJIEHUODUANLU。

  ZAIZHEILI,NINXUYAOCELIANGICHUOLIANJIEQISHANGYINJIAOZHIJIANDEDIANZU。XIANGLINDEYINJIAOTEBIERONGYIFASHENGDUANLU,DANSHIZHEIXIEBINGBUSHIXINGCHENGDUANLUDEWEIYIWEIZHI。JIANCHAHANPAN/YINJIAOZHIJIANDEDIANZUSHIFOUBICIXIANGDUI,BINGQIEJIEDILIANJIESHIFOUJUYOUDIDIANZU。

  

如何检查元件焊盘上PCB的短路


足球彩票  JIANCHAJIEDIDIANHELIANJIEQIHEICSHANGQITAYINJIAOZHIJIANDEDIANZU。ZHEILIXIANSHIDESHIUSBLIANJIEQI。

  SUOXIAOWEIZHI

足球彩票  RUGUONINRENWEILIANGTIAODAOTIZHIJIANHUOMOUTIAODAOTIYUDIMIANZHIJIANCUNZAIDUANLU,ZEKEYITONGGUOJIANCHAFUJINDEDAOTILAISUOXIAOWEIZHI。JIANGWANYONGBIAODEYIGENDAOXIANLIANJIEDAOKEYIDEDUANLULIANJIESHANG,JIANGLINGYIGENDAOXIANYIDAOFUJINDEBUTONGJIEDILIANJIESHANG,BINGJIANCHADIANZU。DANGNINYIZHIGENGYUANDEJIEDISHI,YINGGAIHUIKANDAODIANZUFASHENGBIANHUA。RUGUODIANZUZENGJIA,ZESHUOMINGNINZHENGZAIJIANGJIEDIDEDAOXIANCONGDUANLUWEIZHIYIKAI。ZHEIKEYIBANGZHUNINSUOXIAODUANLUDEQUEQIEWEIZHI,SHENZHIKEYISUOXIAODAOZUJIANSHANGTEDINGDEYIDUIHANPAN/YINJIAO。

  步骤3:如何在PCB上查找故障组件

足球彩票  YOUGUZHANGDEZUJIANHUOANZHUANGBUZHENGQUEDEZUJIANKENENGSHIDUANLUDEYIBUFEN,CONGERZAIDIANLUBANSHANGZAOCHENGXUDUOWENTI。NINDEZUJIANKENENGYOUQUEXIANHUOWEIZAO,ZAOCHENGDUANLUHUODUANLUXIANXIANG。

  BULIANGYUANJIAN

  YOUXIEZUJIANHUIBIANZHI,LIRUDIANJIEDIANRONGQI。RUGUONINYOUKEYIZUJIAN,QINGXIANJIANCHANEIXIEZUJIAN。RUGUOBUQUEDING,TONGCHANGKEYITONGGUOGoogleKUAISUSOUSUOHUAIYIWEI“SHIBAI”DEZUJIAN,YIZHAOCHUZHEISHIFOUSHICHANGJIANWENTI。RUGUONINCELIANGLIANGGEHANPAN/YINJIAOZHIJIANDEDIANZUFEICHANGDI(TAMENDOUBUSHIJIEDIYINJIAOHUODIANYUANYINJIAO),ZEKENENGYOUYUZUJIANSHAOHUAIERDAOZHIDUANLU。ZHEIQINGCHUBIAOMINGDIANRONGQIYIJINGHUAILE。YIDANDIANRONGQIBIANHUAIHUOSHIJIADEDIANYACHAOGUOJICHUANYUZHI,DIANRONGQIYEHUITUCHU。

  

如何检查PCB上的故障组件


  KANDAOCIDIANRONGQIDINGBUDETUQILEMA?ZHEIBIAOMINGDIANRONGQIYISUNHUAI。

  步骤4:如何破坏性地测试PCB

  POHUAIXINGCESHIXIANRANSHIZUIHOUDESHOUDUAN。RUGUONINKEYISHIYONGXSHEXIANCHENGXIANGZHUANGZHI,ZEKEYIJIANCHADIANLUBANDENEIBUERBUPOHUAITA。

足球彩票  ZAIMEIYOUXSHEXIANSHEBEIDEQINGKUANGXIA,NINKEYIKAISHISHANCHUZUJIANBINGZAICIYUNXINGWANYONGBIAOCESHI。ZHEIYOULIANGGEFANGMIANDEBANGZHU。SHOUXIAN,TASHININKEYIGENGQINGSONGDIJIECHUKENENGDUANLUDEHANPAN(BAOKUODAOREDIAN)。QICI,TAXIAOCHULEDUANLUYINQIGUZHANGDEZUJIANDEKENENGXING,SHININKEYIZHUANZHUYUDAOTI。RUGUONINSHEFASUOXIAODAOZUJIANSHANGLIANJIEDEDUANLUWEIZHI,LIRULIANGGEHANPANZHIJIAN,ZEKENENGBUQINGCHUZUJIANSHIFOUYOUQUEXIANHUODIANLUBANNEIBUSHIFOUYOUDUANLU。CISHI,NINKENENGXUYAOXIEXIAZUJIANBINGJIANCHABANSHANGDEHANPAN。XIEXIAZUJIANKERANGNINCESHIZUJIANBENSHENSHIFOUYOUQUEXIAN,HUOZHEBANSHANGDEHANPANSHIFOUZAINEIBUQIAOJIE。

足球彩票  RUGUODUANLU(HUOKENENGSHIDUOGEDUANLU)DEWEIZHIRENGRANNANYIZHUOMO,ZEKEYIQIEKAIDIANLUBANBINGCHANGSHISUOXIAODUANLUDEWEIZHI。RUGUONINDUIDUANLUDEYIBANWEIZHIYOUSUOLEJIE,ZEKEYIQIEKAIDIANLUBANDEYIBUFEN,RANHOUZAIGAIBUFENZHONGFUJINXINGWANYONGBIAOCESHI。CISHI,NINKEYIYONGWANYONGBIAOZHONGFUSHANGSHUCESHI,YIJIANCHATEDINGWEIZHIDEDUANLUQINGKUANG。RUGUONINYIJINGDADAOLEZHEIYIDIAN,NEIMENINDEKONGTOUYIJINGTEBIENANYIZHUOMO。ZHEIYANGZHISHAOKEYISHININJIANGDUANLUDEWEIZHISUOXIAODAODIANLUBANDETEDINGQUYU。