【WEIWENXINPCBWorld】PCBBANDEJIANCESHISHIHOUYAOZHUYIYIXIEXIJIEFANGMIAN,YIBIANGENGYOUZHUNBEIDIBAOZHENGCHANPINZHILIANG,ZAIJIANCEPCBBANDESHIHOU,WOMENYINGZHUYIXIAMIANDE9GEXIAOCHANGSHI。

1、严禁在无隔离变压器的情况下,用已接地的测试设备去接触底板带电的电视、音响、录像等设备来检测PCB板

乐仑彩票YANJINYONGWAIQIAOYIJIEDIDEYIQISHEBEIZHIJIECESHIWUDIANYUANGELIBIANYAQIDEDIANSHI、YINXIANG、LUXIANGDENGSHEBEI。SUIRANYIBANDESHOULUJIDOUJUYOUDIANYUANBIANYAQI,DANGJIECHUDAOJIAOTESHUDEYOUQISHISHUCHUGONGLVJIAODAHUODUICAIYONGDEDIANYUANXINGZHIBUTAILEJIEDEDIANSHIHUOYINXIANGSHEBEISHI,SHOUXIANYAONONGQINGGAIJIDIPANSHIFOUDAIDIAN,FOUZEJIYIYUDIBANDAIDIANDEDIANSHI、YINXIANGDENGSHEBEIZAOCHENGDIANYUANDUANLU,BOJIJICHENGDIANLU,ZAOCHENGGUZHANGDEJINYIBUKUODA。

2、检测PCB板要注意电烙铁的绝缘性能

不允许带电使用烙铁焊接,要确认烙铁不带电,最好把烙铁的外壳接地,对MOS电路更应小心,能采用6~8V的低压电路铁就更安全。

3、检测PCB板前要了解集成电路及其相关电路的工作原理

乐仑彩票JIANCHAHEXIULIJICHENGDIANLUQIANSHOUXIANYAOSHUXISUOYONGJICHENGDIANLUDEGONGNENG、NEIBUDIANLU、ZHUYAODIANQICANSHU、GEYINJIAODEZUOYONGYIJIYINJIAODEZHENGCHANGDIANYA、BOXINGYUWAIWEIYUANJIANZUCHENGDIANLUDEGONGZUOYUANLI。RUGUOJUBEIYISHANGTIAOJIAN,NEIMEFENXIHEJIANCHAHUIRONGYIXUDUO。

4、测试PCB板不要造成引脚间短路

DIANYACELIANGHUOYONGSHIBOQITANTOUCESHIBOXINGSHI,BIAOBIHUOTANTOUBUYAOYOUYUHUADONGERZAOCHENGJICHENGDIANLUYINJIAOJIANDUANLU,ZUIHAOZAIYUYINJIAOZHIJIELIANTONGDEWAIWEIYINSHUADIANLUSHANGJINXINGCELIANG。RENHESHUNJIANDEDUANLUDOURONGYISUNHUAIJICHENGDIANLU,ZAICESHIBIANPINGXINGFENGZHUANGDECMOSJICHENGDIANLUSHIGENGYAOJIABEIXIAOXIN。

5、检测PCB板测试仪表内阻要大

测量集成电路引脚直流电压时,应选用表头内阻大于20KΩ/V乐仑彩票的万用表,否则对某些引脚电压会有较大的测量误差。

6、检测PCB板要注意功率集成电路的散热

乐仑彩票GONGLVJICHENGDIANLUYINGSANRELIANGHAO,BUYUNXUBUDAISANREQIERCHUYUDAGONGLVDEZHUANGTAIXIAGONGZUO。

7、检测PCB板引线要合理

乐仑彩票RUXUYAOJIAJIEWAIWEIYUANJIANDAITIJICHENGDIANLUNEIBUYISUNHUAIBUFEN,YINGXUANYONGXIAOXINGYUANQIJIAN,QIEJIEXIANYAOHELIYIMIANZAOCHENGBUBIYAODEJISHENGOUHE,YOUQISHIYAOCHULIHAOYINPINGONGFANGJICHENGDIANLUHEQIANZHIFANGDADIANLUZHIJIANDEJIEDIDUAN。

8、检测PCB板要保证焊接质量

乐仑彩票HANJIESHIQUESHIHANLAO,HANXIDEDUIJI、QIKONGRONGYIZAOCHENGXUHAN。HANJIESHIJIANYIBANBUCHAOGUO3MIAOZHONG,LUOTIEDEGONGLVYINGYONGNEIRESHI25WZUOYOU。YIHANJIEHAODEJICHENGDIANLUYAOZIXICHAKAN,ZUIHAOYONGOUMUBIAOCELIANGGEYINJIAOJIANYOUFOUDUANLU,QUERENWUHANXIZHANLIANXIANXIANGZAIJIETONGDIANYUAN。

9、检测PCB板不要轻易断定集成电路的损坏

BUYAOQINGYIDIPANDUANJICHENGDIANLUYISUNHUAI。YINWEIJICHENGDIANLUJUEDADUOSHUWEIZHIJIEOUHE,YIDANMOUYIDIANLUBUZHENGCHANG,KENENGHUIDAOZHIDUOCHUDIANYABIANHUA,ERZHEIXIEBIANHUABUYIDINGSHIJICHENGDIANLUSUNHUAIYINQIDE,LINGWAIZAIYOUXIEQINGKUANGXIACEDEGEYINJIAODIANYAYUZHENGCHANGZHIXIANGFUHUOJIEJINSHI,YEBUYIDINGDOUNENGSHUOMINGJICHENGDIANLUJIUSHIHAODE。YINWEIYOUXIERUANGUZHANGBUHUIYINQIZHILIUDIANYADEBIANHUA。

 PCB板调试方法

DUIYUGANGNAHUILAIDEXINPCBBAN,WOMENSHOUXIANYAODAGAIGUANCHAYIXIA,BANSHANGSHIFOUCUNZAIWENTI,LIRUSHIFOUYOUMINGXIANDELIEHEN,YOUWUDUANLU、KAILUDENGXIANXIANG。RUGUOYOUBIYAODEHUA,KEYIJIANCHAYIXIADIANYUANGENDIXIANZHIJIANDEDIANZUSHIFOUZUGOUDA。

乐仑彩票DUIYUYIGEXINSHEJIDEDIANLUBAN,DIAOSHIQILAIWANGWANGHUIYUDAOYIXIEKUNNAN,TEBIESHIDANGBANBIJIAODA、YUANJIANBIJIAODUOSHI,WANGWANGWUCONGXIASHOU。DANRUGUOZHANGWOHAOYITAOHELIDEDIAOSHIFANGFA,DIAOSHIQILAIJIANGHUISHIBANGONGBEI。

 PCB板调试步骤 

乐仑彩票1、DUIYUGANGNAHUILAIDEXINPCBBAN,WOMENSHOUXIANYAODAGAIGUANCHAYIXIA,BANSHANGSHIFOUCUNZAIWENTI,LIRUSHIFOUYOUMINGXIANDELIEHEN,YOUWUDUANLU、KAILUDENGXIANXIANG。RUGUOYOUBIYAODEHUA,KEYIJIANCHAYIXIADIANYUANGENDIXIANZHIJIANDEDIANZUSHIFOUZUGOUDA。

2、RANHOUJIUSHIANZHUANGYUANJIANLE。XIANGHUDULIDEMOKUAI,RUGUONINMEIYOUBAWOBAOZHENGTAMENGONGZUOZHENGCHANGSHI,ZUIHAOBUYAOQUANBUDOUZHUANGSHANG,ERSHIYIBUFENYIBUFENDEZHUANGSHANG(DUIYUBIJIAOXIAODEDIANLU,KEYIYICIQUANBUZHUANGSHANG),ZHEIYANGRONGYIQUEDINGGUZHANGFANWEI,MIANDEDAOSHIYUDAOWENTISHI,WUCONGXIASHOU。

YIBANLAISHUO,KEYIBADIANYUANBUFENXIANZHUANGHAO,RANHOUJIUSHANGDIANJIANCEDIANYUANSHUCHUDIANYASHIFOUZHENGCHANG。RUGUOZAISHANGDIANSHININMEIYOUTAIDADEBAWO(JISHIYOUHENDADEBAWO,YEJIANYININJIASHANGYIGEBAOXIANSI,YIFANGWANYI),KEKAOLVSHIYONGDAIXIANLIUGONGNENGDEKEDIAOWENYADIANYUAN。

乐仑彩票XIANYUSHEHAOGUOLIUBAOHUDIANLIU,RANHOUJIANGWENYADIANDIANYUANDEDIANYAZHIMANMANWANGSHANGDIAO,BINGJIANCESHURUDIANLIU、SHURUDIANYAYIJISHUCHUDIANYA。RUGUOWANGSHANGDIAODEGUOCHENGZHONG,MEIYOUCHUXIANGUOLIUBAOHUDENGWENTI,QIESHUCHUDIANYAYEDADAOLEZHENGCHANG,ZESHUOMINGDIANYUANBUFENOK。FANZHI,ZEYAODUANKAIDIANYUAN,XUNZHAOGUZHANGDIAN,BINGZHONGFUSHANGSHUBUZHOU,ZHIDAODIANYUANZHENGCHANGWEIZHI。

乐仑彩票3、JIEXIALAIZHUJIANANZHUANGQITAMOKUAI,MEIANZHUANGHAOYIGEMOKUAI,JIUSHANGDIANCESHIYIXIA,SHANGDIANSHIYESHIANZHAOSHANGMIANDEBUZHOU,YIBIMIANYINWEISHEJICUOWUHUO/HEANZHUANGCUOWUERDAOZHIGUOLIUERSHAOHUAIYUANJIAN。

 寻找故障PCB板的办法 

1、测量电压法寻找故障PCB板

SHOUXIANYAOQUERENDESHIGEXINPIANDIANYUANYINJIAODEDIANYASHIFOUZHENGCHANG,QICIJIANCHAGEZHONGCANKAODIANYASHIFOUZHENGCHANG,LINGWAIHAIYOUGEDIANDEGONGZUODIANYASHIFOUZHENGCHANGDENG。LIRU,YIBANDEGUISANJIGUANDAOTONGSHI,BEJIEDIANYAZAI0.7VZUOYOU,ERCEJIEDIANYAZEZAI0.3VZUOYOUHUOZHEGENGXIAO。RUGUOYIGESANJIGUANDEBEJIEDIANYADAYU0.7V(TESHUSANJIGUANCHUWAI,LIRUDALINDUNGUANDENG),KENENGJIUSHIBEJIEJIUKAILU。

2、信号注入法寻找故障PCB板

JIANGXINHAOYUANJIAZHISHURUDUAN,RANHOUYICIWANGHOUCELIANGGEDIANDEBOXING,KANSHIFOUZHENGCHANG,YIZHAODAOGUZHANGDIAN。YOUSHIWOMENYEHUIYONGGENGJIANDANDEBANFA,LIRUYONGSHOUWOYIGENIEZI,QUPENGCHUGEJIDESHURUDUAN,KANSHUCHUDUANSHIFOUYOUFANYING,ZHEIZAIYINPIN、SHIPINDENGFANGDADIANLUZHONGCHANGSHIYONG(DANYAOZHUYI,REDIBANDEDIANLUHUOZHEDIANYAGAODEDIANLU,BUNENGSHIYONGCIFA,FOUZEKENENGHUIDAOZHICHUDIAN)。RUGUOPENGQIANYIJIMEIYOUFANYING,ERPENGHOUYIJIYOUFANYING,ZESHUOMINGWENTICHUZAIQIANYIJI,YINGZHONGDIANJIANCHA。

3、其他寻找故障PCB板的方法

HAIYOUHENDUOQITADEXUNZHAOGUZHANGDIANDEFANGFA,LIRUKAN、TING、WEN、MODENG。

“KAN”JIUSHIKANYUANJIANYOUWUMINGXIANDEJIXIESUNHUAI,LIRUPOLIE、SHAOHEI、BIANXINGDENG;

乐仑彩票“TING”JIUSHITINGGONGZUOSHENGYINSHIFOUZHENGCHANG,LIRUYIXIEBUGAIXIANGDEDONGXIZAIXIANG,GAIXIANGDEDIFANGBUXIANGHUOZHESHENGYINBUZHENGCHANGDENG;

“WEN”JIUSHIJIANCHASHIFOUYOUYIWEI,LIRUSHAOJIAODEWEIDAO、DIANRONGDIANJIEYEDEWEIDAODENG,DUIYUYIGEYOUJINGYANDEDIANZIWEIXIURENYUANLAISHUO,DUIZHEIXIEQIWEISHIHENMINGANDE;

“MO”JIUSHIYONGSHOUQUSHITANQIJIANDEWENDUSHIFOUZHENGCHANG,LIRUTAIRE,HUOZHETAILIANG。

YIXIEGONGLVQIJIAN,GONGZUOQILAISHIHUIFARE,RUGUOMOSHANGQUSHILIANGDE,ZEJIBENSHANGKEYIPANDUANTAMEIYOUGONGZUOQILAI。DANRUGUOBUGAIREDEDIFANGRELEHUOZHEGAIREDEDIFANGTAIRELE,NEIYESHIBUXINGDE。YIBANDEGONGLVSANJIGUAN、WENYAXINPIANDENG,GONGZUOZAI70DUYIXIASHIWANQUANMEIWENTIDE。70DUDAGAISHIZENYANGDEYIGEGAINIANNI?RUGUONIJIANGSHOUYASHANGQU,KEYIJIANCHISANMIAOZHONGYISHANG,JIUSHUOMINGWENDUDAGAIZAI70DUYIXIA(ZHUYIYAOXIANSHITANXINGDEQUMO,QIANWANBIEBASHOUTANGSHANGLE)。

乐仑彩票——WEIWENXIN 《YINZHIDIANLUSHIJIE》ZAZHI

ZHENGJIXINWENXIANSUO

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