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求助三星S43AX-YB01屏Y板LJ92-01854A LJ41-10136A亮一下黑屏

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Post time: 2019-2-27 11:07:21
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     三星PS43D450A2电视配S43AX-YB01屏Y板LJ92-01854A LJ41-10136A有信号或许TV功能亮一下就黑屏,无信号可以常开不黑,但是Y板有吱吱响不敢开的太久。   原来故障是开机不亮,初步检查Y板Q5000.D5116.Q5017击穿,C5089.C5100爆裂,把坏件换上就出现以上现象。无信号开机测试各测试点电压与正常板对比相差不大,谢谢师傅们指点指点。

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 Author| Post time: 2019-2-27 11:14:21
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还有Y板上的1KV的102和331电容都检查过代换过了,还是没能解决问题。
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Post time: 2019-2-27 12:22:40
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坏功率管G极的电阻是否有坏的?
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 Author| Post time: 2019-2-28 08:07:46
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刘小金 2019-2-27 12:22
坏功率管G极的电阻是否有坏的?

功率管G极的电阻已经测试过了15Ω,10KΩ没有坏。
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