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请教夏普LCD改LED问题

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Post time: 2019-11-23 14:45:14
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一台夏普LCD彩电背光故障,决定改成LED,但是电路板上排线没有任何符号标识,请问各位师傅,如何准确找到背光开关线和亮度调节线,请师傅们赐教,谢谢先!

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Post time: 2019-11-23 22:57:47
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Thank you indeed for your post.
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Post time: 2019-11-24 08:27:27
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拆了板子看另一面也许会有惊喜!!!!
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 Author| Post time: 2019-11-24 08:39:18
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天鸿电脑 2019-11-24 08:27
拆了板子看另一面也许会有惊喜!!!!

看了,两面都没有标识。。。
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Post time: 2019-11-24 08:47:05
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拆去背光板能通过自检?背光开关接指示灯就可以了,真的没办法的话。
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Post time: 2019-11-24 08:56:46
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刘宇辉 2019-11-24 08:39
看了,两面都没有标识。。。

那就跑线路啊,高压板上找线, 高压板到电源板连接排线一般有四个  V+     地     开关控制  亮度控制,仔细看一下,V+ 和地  一般是多跟线并联用的,一看就能看出来, 开关控制  和亮度控制线 一般在线路板上的线是很细的 应该能看出来,至于这两根线怎么分,量一下开机和关机的电压变化就能分出来
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Post time: 2019-11-28 09:02:25
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改LED效果不理想,固定灯条、控制背光亮度、灯珠凸透镜选择、导光板与灯条距离、解除主板背光保护、更换背光反光纸,到最后你会发现还是更换灯管最方便最有效,LCD改装LED除了省点电量,比自己装一台液晶都费劲!
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Post time: 2019-11-28 13:27:53
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液晶显示器改比较简单,来我这里的lcd灯条坏都是改led。方便又省电。。也简单。主要还是小尺寸
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