500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/80/225731251602938.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">如何用示波器测试变压器的初级电压
各位高手们,我想用IC TNY254做电源,但是我想看看IC的D端的波形,用示波器如何测试?上次我测试时,示波器地线夹负板(IC的S极),探头接IC的D端,但是突然冒火了,是不是我接得不对?
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