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3V,5V對地短路維修方向8 d2 s: {% ]6 Z
目檢:Chipset (Southbridge, Northbridge, I/O chip, GD75232, Sound chip, AC97, PWM... 是否有燒毀, USB, P/S2 Connector, CNR Slot, Chipset…是否有撞壞造成短路./ [ \0 ?4 w! P t! e4 A6 z+ X9 W
觸摸:打開(kāi)電源觸摸 Chipset 是否有發(fā)燙.' k6 O$ X! Z A% i$ r/ T
電源不打開(kāi)時(shí),用電表檢測那組電源短路,再決定移除短路電源有連接相關(guān)晶片,PWM,電阻電容..
. i: J- w7 E! J9 Y1 CMain chip 南北橋,I/O Chip, Sound chip, AC97, PWM…都移除短路沒(méi)解開(kāi),建議換板.9 c7 [+ u1 |4 A3 g4 r
*.注意: 3V&5V短路維修方法 Chipset 移除至短路解開(kāi)再焊,不能移除一顆換上顆,有可能換上新 Chipset 因短路電源沒(méi)解開(kāi), Turn on power chipset brunt out. |
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