1、波形在关断时为什么有振荡?
2、电压加到250时炸机
3、电压不稳定,满载时4.88V,空载时5.2V
4、开始时5V一分钟后降到4.88V
5、空载和轻载时,叫,R4两端并一224电容可大大减轻,加这224电容有什么坏处?
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/58/419311193059895.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
6、VIPER12A的过压过流保护在哪?如何调整?
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/58/419311193060071.jpg');}" onmousewheel="return imgzoom(this);">