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tcl-L42E9FR(MS91A机芯)花屏检修过程

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发表于 2011-5-11 04:47:03 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
500) { this.width=500; }">    L42E9FR(MS91A机芯)故障现象:花屏检修过程:通电试机,将信号输出输入至另一台电视机上,无信号,首先测试电源板输入的供电电压正常,测量DDR供电三端稳压块U802,电压为1.8V,一想不对呀(MS58\68是1.8V供电)该机芯板的DDR供电应该是2.5V,拆下U802清楚的看到上面标着LD25(2.5V)输入脚端是5V,测负载无短路,说明系该芯片损坏所致,找一只新的LD25装上试机,一切正常.0) this.style.zoom=zoom+'%';return false;" title="按此在新窗口浏览图片" src=/upload/forum/201103/20110329201447rp.jpg>
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沙发
发表于 2012-7-21 13:59:18 | 只看该作者
我怎么才能看全文
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板凳
发表于 2012-12-7 19:21:25 | 只看该作者
谢谢分享,好经验。
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地板
发表于 2013-8-1 15:34:34 | 只看该作者

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