|
3V,5V對地短路維修方向
* {8 V: [% ]' l0 g- m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.1 l# F) e. g. ?, d5 [5 W
觸摸:打開(kāi)電源觸摸 Chipset 是否有發(fā)燙.
+ S$ v* B8 R1 k$ C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..& j" s/ S- @" z$ v6 F& r& |
Main 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.; F7 S1 O- s3 v# e7 q. }
*.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. |
|