感謝樓上,我看了下,發熱主要是開關管發熱,變壓器和輸出端濾波電容式其次.其他元件都還好.
看來主要是散熱問題.

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打了N多的散熱孔.這下應該沒有問題了.

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500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖,點擊可放大。\n按住CTRL,滾動鼠標滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/80/128771249615736.jpg');}" onmousewheel="return imgzoom(this);">