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ag体育下载

电路板维修过程中的技巧知识汇总

2019-11-28  来自: http://hbhxcj.com/Articles-33084.html 浏览次数:37

  控制系统由于价格不菲,因此当其发生故障时,为了讲求经济效益,节约成本,一般采用维修的方式。但是在发生以下几种情况时,需要电路板维修;电路板被损坏,电路板不断出现问题的,说明电路板存在不稳定因素,已经不适于在机床中继续使用的。本人从事电路板的维修工作多年,在工作中总结了一些维修的方法及技巧,介绍给大家,与大家共勉之。

  1guanchafa

  dangagtiyuxiazainadaoyikuaidaiweixiudedianlubanshi,shouxianduitadewaiguanjinxingzixideguancha。ruguodianlubanbeishaoguo,neimezaijidianlubantongdianqian,yidingyaozixijianchadianyuandianlushifouzhengchang,zaiquebaobuhuiyinqiercisunshanghouzaitongdian。guanchafashishuyujingtaijianchafadeyizhong,zaiyunyongguanchafashi,yibanzunxunyixiajigebuzhou。

ag体育下载  diyibuguanchadianlubanyoumeiyoubeirenweisunhuai,zheizhuyaocongyixiajigefangmianlaikan:

  ①kanshifoudianlubanbeishuaiguo,daozhilebanjiaofashengbianxing,huoshibanshangxinpianbeishuaibianxinghuoshuaihuaide。

  ②guanchaxinpiandechazuo,kanshifouyouyumeiyouzhuanyonggongju,erbeiqiangzhiqiaohuaide。

  ③guanchadianlubanshangdexinpian,ruoshidaichazuode,shouxianguanchaxinpianshifouchacuole,zheizhuyaoshifangzhicaozuozhezijiweixiudianlubanshijiangxinpiandeweizhihuofangxiangchacuo。ruguomeiyoujishibacuowugaizheng,dangjidianlubantongdianshi,youkenenghuishaohuaixinpian,zaochengbubiyaodesunshi。

  ④ruguodianlubanshangdaiyouduanjieduanzide,guanchaduanjieduanzishifouchacuole。

ag体育下载  dianlubandeweixiuxuyaodeshililunshangdezhashigongdi,gongzuoshangdezixirenzhen,tongguoweixiuzhedezixiguancha,youshizaizheiyibujiunengpanduanchufashengwentideyuanyin。

  dierbuguanchadianlubanshangdeyuanqijianyoumeiyoubeishaohuaide。birudianzu、dianrong、erjiguanyoumeiyoufahei、bianhudeqingkuang。zhengchangqingkuangxia,dianzujishibeishaohule,tadezuzhiyebuhuiyoubianhua,xingnengbuhuigaibian,buyingxiangzhengchangshiyong,zheishixuyaoshiyongwanyongbiaofuzhuceliang。danshiruguoshidianrong、erjiguanbeishaohule,tamendexingnengjiuhuifashenggaibian,zaidianluzhongjiubunengfahuiqiyingyoudezuoyong,jianghuiyingxiangzhenggedianludezhengchangyunxing,zheishibixugenghuanxindeyuanqijian。

  disanbuguanchadianlubanshangdejichengdianlu,biru74xilie、cpu、xiechuliqi、addengdengxinpian,youmeiyougubao、liekou、shaohu、faheideqingkuang。ruguoyouzheiyangdeqingkuangfasheng,jibenkeyiquedingxinpianyijingbeishaohuai,bixugenghuan。

  disibuguanchadianlubanshangdezouxianyoumeiyouqipi、shaohuduanludeqingkuang。chentongkongyoumeiyoutuolihanpande。

  diwubu:guanchadianlubanshangdebaoxian(baokuobaoxianguanheremindianzu),kanbaoxiansishifoubeirongduan。youshiyouyubaoxiansitaixi,kanbuqingchu,keyijiezhufuzhugongju-wanyongbiaolaipanduanbaoxianguanshifousunhuai。

  yishangsizhongqingkuangdefasheng,dadoushiyouyudianluzhongdianliuguodazaochengdehouguo。danshijutishishenmeyuanyinzaochengdedianliuguoda,jiuyaojutiwentijutifenxi。danchazhaowentidezongtisilushishouxianyaozixifenxidianlubandeyuanlitu,ranhougenjusuoshaohuideyuanqijiansuozaidianlu,chazhaotadeshangjidianlu,yibuyibuxiangshangtuidao,zaipinggongzuozhongjileideyixiejingyan,fenxizuirongyifashengwentidedifang,zhaochuguzhangfashengdeyuanyin。

  2jingtaiceliangfa

  duidabufendedianlubanlaishuo,tongguoqianmiandeguanchafa,bingbunengfaxianwenti。zhiyaoshaobufendedianlubanhuiyinweiyixieteshudeyuanyinfashengwulibianxing,qingyidezhaochuguzhangyuanyin,dabufenfashengguzhangdedianluban,haishixuyaojiezhuwanyongbiao,duidianlubanshangdeyixiezhuyaoyuanqijian、guanjiandianjinxingyouxudeceliang,faxianwenti,jiejuewenti。

  zaiceliangzhiqian,shouxianyaopanduandianlushiyimonixinhaoweizhu,haishiyishuzixinhaoweizhu。duiyuyouyuanlitudedianlubanlaishuo,tongguochakanyuanlitujiunengpanduan。danshiduiyumeiyouyuanlitudedianlubanlaishuo,yibantongguoyixialiangzhongfangfapanduan:①guanchadianlubanshangdeyuanqijian,kandianlubanshangshifouyouweichuliqi,buguanshizaoqide80、51xilie,haishixianzaiguangfanyingyongdedsp,zhiyaodianlubanshangchuxianzheiyangdexinpian,jiushuomingbanzishangyouzongxianjiegou,shuzixinhaobijiangzhanyouhendadeyibufen,jiukeyibatadangzuoshuzibanlaichuli。②duiyumeiyouweichuliqidedianluban,guanchabanshangyuanqijian,kanyingyong5vdianyuandexinpianduobuduo。ruguo5vdianyuanxinpianhenduo,yekeyibatadangzuoshuzidianlulaijinxingxiuli。duiyushuzidianluhemonidianludeweixiufangshishibutongde,yibanlaishuomonidianluweixiuqilaigengjiandanyixie,keyiyibuyibudexiangqiantuidao,zhaochuwenti。danshiduiyushuzidianlulaishuo,youyudianludouguazaizongxianshang,meiyoumingquedeshangxiajiguanxi。yinciweixiuqilaiyaogengkunnanyixie,xiamianzhizhezhongchanshushuzidianludejingtaiceliangfa,weixiuzhuyaozunxunyixiajigebuzhoulaijinxing。

  diyibu:shiyongwanyongbiaojianchadianyuanyudizhijianshifouduanlu。

  jianchadefangfashi:zhaoyige5vdianyuangongdiandexinpian,celiangduijiaoxianshangdeliangdian(biru14jiaodexinpian,zeceliang7jiaoyu14jiao。

  16jiaodexinpian,zeceliang8jiaoyu16jiao)。ruguoliangdianzhijianmeiyouduanlu,shuomingdianyuangongzuodazhizhengchang。ruofashengduanluxianxiang,zexuyaotongguopaichafazhaodaoyuanyin。

  zheixiebuzhouzhishidianyuanweixiudejibensilu,jutidaotebiefuzadedianlubanhaixuyaojutiwentijutifenxi。

  dianyuanshidianludejichu,zhiyoudianyuangongzuozhengchang,cainengtandaohouxudianludeyingyong。yincidianyuandeceliangshifeichangzhongyaode,tongshiyeshitebierongyibeiweixiuzhehulvedeyibu。

  dierbu:shiyongwanyongbiaoceliangerjiguan,guanchaqigongzuoshifouzhengchang。zhengchangqingkuangxia,yongdianzudangcezhengfuji,zhengxiangceliangweijishidaojibaiou,fanxiangweiyiqiandaojiqianou。yibanlaishuoerjiguanfashengsunhuaideqingkuang,doushiyouyudianluzhongdedianliuguodadaozhierjiguanbeijichuan。

  disanbu:shiyongwanyongbiaodianzudangceliangdianrong,kanshifouyouduanlu、duanludeqingkuang,ruguoyou,zeshuomingzheibufendianluyouwenti。xiayibujiuxuyaoquedingshiyuanjianbenshenyouwenti,haishigentaxiangliandedianluyouwenti,fangfashijiangkeyiyuanjiandeyijiaohanxialai,kanyuanjianshifouyouduanlu、duanluqingkuang。zheiyangjiukeyiyibuquedingwentisuozai。

ag体育下载  disibu:tongyangshiyongwanyongbiaoduidianlubanshangdejichengdianlu、sanjiguan、dianzudengjinxingceliang,kanqishifoufuhebenshendeluojixingneng。ruguodianlubanshangbaokuozongxianjiegoude,yibanzaizongxianshang,douhuiyoutiladianzupai。dianzupaideceliang,shifeichangzhongyaodeyibu,tongguotadehaohuaikeyichubujianyanguazaizongxianshangdexinpiandehaohuai。

  tongguoguanchafahejingtaiceliangfadejianchazhihou,dianlubanweixiuzhongchuxiandedabufenwentikeyibeijiejue,zhidezhuyideyidianshiyidingyaoquebaodianyuandezhengchang,bimianzaixiayibujinxinghouzaochengduidianlubandeercisunshang。

  3zaixianceliangfa

  zaixianceliangfayibanyingyongzaipiliangshengchandianlubandechangjia,shengchanchangshangweileweixiufangbian,yibanhuidajianyigebijiaotongyongdediaoshiweixiupingtai,takeyifangbiandetigongdianlubansuoxudedianyuanyijiyixiebiyaodechushixinhao。zaixianceliangfazhuyaojiejuelianggefangmiandewenti。yishijiangshanglianggebuzhouzhongfaxiandewentixifen,zuizhongsuodingdaochuxianwentideyuanqijian。ershitongguoshangmianliangbudejiancha,wentibingmeiyoudedaojiejuede,xuyaotongguozaixianceliangzhaochuguzhangyuanyin。zaixianceliangfazhuyaotongguoyixiajigebuzhoulaijinxing。

ag体育下载  diyibu:jidianlubantongdian,zaizheibuzhongxuyaozhuyideshi,youxiedianlubandianyuanbingbushidanyide,kenengxuyao5v,haihuixuyaozhengfu12v,24vdengdeng,buyaobagaijiadedianyuanloujiale。dianlubantongdianhou,tongguoshoumodianlubanshangdeyuanqijian,kanshifouyoufatangfaredeyuanjian,zhongdianjiancha74xiliexinpian,ruguoyuanjianyoutangshoudeqingkuang,zeshuomingciyuanjianyoukenengyijingsunhuai。genghuanyuanjianhou,jianchadianlubanguzhangshifouyijiejue。

ag体育下载  dierbu:yongshiboqiceliangdianlubanshangdemendianlu,guanchaqishifoufuheluojiguanxi。ruoshuchubufuheluoji,xuyaofenliangzhongqingkuangfenbieduidai,yizhongshishuchuyinggaishididianpingde,shijiceliangweigaodianping,keyizhijiepanduanxinpiansunhuai;lingyizhongshishuchuyinggaishigaodianpingde,shijiceliangweidide,bingbunengjiucipandingxinpianyijingsunhuai,haixuyaojiangxinpianyuhoumiandedianluduankai,zaiciceliang,guanchaluojishifouheli,pandingxinpiandehaohuai。

  disanbu:yongshiboqiceliangshuzidianlulidejingzhen,kanqishifouyoushuchu。ruowushuchu,zexuyaojiangyujingzhenxiangliandexinpianjinkenengdouzhaidiaohouzaijinxingceliang。ruohaiwushuchu,zechubupandingjingzhenyijingsunhuai;ruoyoushuchu,xuyaojiangzhaidiaodexinpianyipianyipianzhuanghuiqu,zhuangyipianceyipian,zhaochuguzhangsuozai。

ag体育下载  disibu:daizongxianjiegoudeshuzidianlu,yibanbaokuoshuzi、dizhi、kongzhizongxiansanlu。yongshiboqiceliangsanluzongxian,duibiyuanlitu,guanchaxinhaoshifouzhengchang,zhaochuwenti。

  zaixianceliangfazhuyaoyongyuliangkuaihaohuaidianlubandeduibi,tongguoduibi,faxianwenti,jiejuewenti。congerwanchengdianlubandeweixiu。


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