Fault is inevitable during the using of electron circuit . in practice , we think out of all kinds of methods to detect the fault existing in the electron circuit board . then , we can supply reference for repair 電子線路在使用過程中發(fā)生故障是不可避免的,對(duì)于發(fā)生故障的電路板,在實(shí)踐中,我們總是想出很多辦法來找出它的故障所在,進(jìn)而對(duì)以后的維修提供參考。