常见主板开机电路图
一、开机线路图
电路图示例1 src="/adianzi/UploadPic/2009-8/20098921232350.jpg" width=361 style="cursor:pointer;" onload="return imgzoom(this,600);" onclick="javascript:window.open(this.src);" style="cursor:pointer;"/>
1、VIA大多由南桥开机,有83977EFI/O的由I/O开机
电路图示例2 src="/adianzi/UploadPic/2009-8/20098921233377.jpg" width=476 style="cursor:pointer;" onload="return imgzoom(this,600);" onclick="javascript:window.open(this.src);" style="cursor:pointer;"/>
2、inter主板较,83627高进高出,8702、8712低进低出
电路图示例3 src="/adianzi/UploadPic/2009-8/20098921233800.jpg" width=388 style="cursor:pointer;" onload="return imgzoom(this,600);" onclick="javascript:window.open(this.src);" style="cursor:pointer;"/>
3、SIS开机电路
电路图示例4 src="/adianzi/UploadPic/2009-8/20098921233584.jpg" width=476 style="cursor:pointer;" onload="return imgzoom(this,600);" onclick="javascript:window.open(this.src);" style="cursor:pointer;"/>
4、VIA多,370、462主板常见
故障现象:无法软关机,开机不稳定时好时坏,多为门电路坏
二、I/O开机图
电路图示例1 src="/adianzi/UploadPic/2009-8/20098921233966.jpg" width=360 style="cursor:pointer;" onload="return imgzoom(this,600);" onclick="javascript:window.open(this.src);" style="cursor:pointer;"/>
电路图示例2 src="/adianzi/UploadPic/2009-8/20098921233836.jpg" width=359 style="cursor:pointer;" onload="return imgzoom(this,600);" onclick="javascript:window.open(this.src);" style="cursor:pointer;"/>
1、132门电路容易损坏
2、83627I/O中第67脚有3.3V高电平(点PWR不机,且67脚有3.3V电压为I/O坏,少数为南桥坏)
3、83627第67脚为0V,查南桥待机电压,拆下I/O测
4、83627第67脚为0V-1V,I/O坏
5、83627I/O损坏的故障现象:不开机、能开机不能关机、复位灯常亮