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剛接到這臺機是接電流表0.009,按開(kāi)關(guān)沒(méi)反應,感覺(jué)有待機不觸發(fā)啊,拆機吧,完了用表量3、5V,沒(méi)有呢,找公共點(diǎn)呃,對地了,量了半天CPU上管G極跟S極阻極阻極也偏低,拆下來(lái)再量,公共點(diǎn)還是短加電燒出來(lái)了,CPU供電上管有個(gè)電容短了(C4160),好了短路解決。接電源3、5V還是沒(méi)有,且+V3LA跳變TPS51125沒(méi)開(kāi)關(guān)信號1、6PIN如下圖6 j( V$ P2 I' p, I# A
file:///C:/Documents%20and%20Settings/Administrator/Application%20Data/Tencent/Users/25185580/QQ/WinTemp/RichOle/]RHJNV0]C~R%`0AF4CRK3TA.jpg EC_PW_ON受IO控制9 E& `- l( ^2 [( M# K$ v4 I& S
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[img]file:///C:/Documents%20and%20Settings/Administrator/Application%20Data/Tencent/Users/25185580/QQ/WinTemp/RichOle/%@{~%T[P3Y`DMUNX3MWH5`6.jpg[/img] 現在接到IO這邊沒(méi)
4 A' E) O. ?, G/ K& w" x4 A/ W) Ofile:///C:/Documents%20and%20Settings/Administrator/Application%20Data/Tencent/Users/25185580/QQ/WinTemp/RichOle/FH)D0I~S$0(8K~O]((8I07Q.jpg 這些電壓都沒(méi)有,現在不知道下手了,關(guān)鍵點(diǎn)測試是哪些呢?請大家指點(diǎn)一下。+ O6 ]6 z9 B8 v9 I* h6 w
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