飞利浦150B4故障

会员29883 · 发表于 2009-4-2 10:02:50

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本帖最后由星星科技于 2009-4-2 10:40 编辑

飞利浦150B4
故障：
第一次插电，开机正常，马上关机或等一段时间在关机，都是开不开，电源指示灯不亮，必须要把电源拔掉等5分钟左右的样子才能再次开机，指示灯亮，图像正常。在关机又开不开。

指示灯亮的时候电压3.3V 正常 12V正常

指示灯不亮的丝毫电压3.3V 在2V--3.3V之间波动 12V 在7V-----9V之间波动

会员36647 · 发表于 2009-4-2 10:57:26

电源不正常，，，查电源反馈跟稳压部分

会员29883 · 发表于 2009-4-4 12:46:15

楼上的发的什么呢我这是液晶显示器故障啊

会员132121 · 发表于 2009-4-4 14:46:28

换一个光耦啦，你看看光耦的引脚是不是氧化哦，我以前修个一台这样的，用817换了就可以

会员70379 · 发表于 2009-6-16 14:08:07

12V和5V之间有个10V的稳压二极管，型号是1N5347B,换掉就行了。

�*** · 发表于 2009-6-23 14:09:34

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会员114928 · 发表于 2009-6-23 14:17:49

飞利浦150B4
故障：
第一次插电，开机正常，马上关机或等一段时间在关机，都是开不开，电源指示灯不亮，必须要把电源拔掉等5分钟左右的样子才能再次开机，指示灯亮，图像正常。在关机又开不开。

指示灯亮的 ...
先把机里的灰尘清理干净,是否有虚焊,再找个24系列的存储器写数据,估计原来显示器高压打过火,ROM数据丢失

飞利浦150B4故障

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