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索尼 KLV-42EX410 究竟逻辑板的问题还是屏的问题?

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Post time: 2013-6-20 01:13:26
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索尼 KLV-42EX410
逻辑板 6870C-0368D
配 LC420EUN  SD V4 屏
故障有声音没图像,有背光 ,
打开外壳测量逻辑板五大供电12V正常

VIN有12V
VDD  0V  ,VCC OV ,VGH 0V, VCOM 0V ,VGL 0V,P-VDD 0v
怀疑17139E有问题,
可是手上没这个,再进一步检查发现断开屏线五大供电全有了
VDD16.6V ,VCC 3.2V ,VGH 27.8V,VGL-5V,VCOM 7.2V,   P-VDD16.6V
测量屏线对地电阻没有发现有短路,哪位大师有遇过这样的故障的,
这是屏坏的可能性大,还是逻辑板坏的可能性大呢?

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Post time: 2013-6-20 09:17:07
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逻辑板坏的可能性大
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 Author| Post time: 2013-6-20 09:40:31
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谢谢!我觉得也是
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Post time: 2013-8-9 20:44:29
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LG的逻辑板 坏的太少了 但我不保证不会坏   主板的各项电压必须 测试过  索尼坏的电源板 和屏幕多 其他少见
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Post time: 2013-10-19 23:44:46
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应该先用万能TV板测试一下
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Post time: 2013-11-8 00:08:05
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我也建议用通用电视板点看看为上策
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Post time: 2014-2-7 16:09:55
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让服务菜单,还需要输入
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Post time: 2014-3-28 06:39:35
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新手学习.。。。。。。
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Post time: 2014-4-15 11:13:39
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逻辑板坏的概率高一些,
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Post time: 2014-4-15 22:15:56
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屏坏了,换逻辑板无用的。
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