【導(dǎo)讀】開始工作，會(huì)送一個(gè)電壓給晶體，晶體起振工作，產(chǎn)生振蕩，發(fā)出波形。關(guān)時(shí)，開機(jī)針帽的兩個(gè)腳接通，而使南橋送出開機(jī)電壓對(duì)地短路，拉低南橋送出的開機(jī)電壓，而使南橋里的開機(jī)電路導(dǎo)通，拉低靜態(tài)5V電壓，使其變?yōu)?電位。晶體的兩腳之間的阻值在450---700歐之間。在它的兩腳各有1V左右的電壓，由分頻器提供。晶體兩腳常生的頻率總和是。總頻在分頻器出來后送到PCI槽的B16腳和ISA的B30腳。也有的還送到南橋，目的是使南橋的頻率更加穩(wěn)定。在總頻OSC線上還電容。沒有總頻，南、北橋、CPU、CACHE、I/O、內(nèi)存上就沒有頻率。有，在南橋電源正常情況下，為南橋壞。上，時(shí)鐘線比AD線要粗一些，并帶有彎曲。當(dāng)決定一件事情的各個(gè)條件全部具備時(shí)，這件事情才會(huì)發(fā)生，而且一定發(fā)生。這樣的因果關(guān)系稱為“或”。

　　

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