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长城L2721G显示器,主板那个脚位是控制背光亮度跟开启的

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Post time: 2019-7-7 19:13:48
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一台长城L2721G仿苹果显示器,故障为背光一亮既灭。灯条烧了,查原装灯条价格比较贵还是拆机的。打算直接用组装机的12v灯条改掉,现在不知道主板背光开启跟调节是在那个脚,主板没有单独的背光控制芯片,可能是直接由cpu控制。哪位师傅有这板的电路图或者cpu那脚是背光开启跟亮度调节的吗


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Post time: 2019-7-9 08:43:04
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这个IC是什么型号的?发上来我帮你看看!

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 Author| Post time: 2019-7-10 14:03:38
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曹韬家电维修 2019-7-9 08:43
这个IC是什么型号的?发上来我帮你看看!

那个是3484a,这个是DC-DC电源ic,cpu旁边的是储存器。除了这两个外,没有其它ic了
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