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iFix 爱修网»Forum › 会员注册 技术求助区 专业液晶维修 编程器官方网站 › RT300系列LED测试仪 › RT300M按键切换电压
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RT300M按键切换电压

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jiadianwx
Post time: 2026-9-20 12:47:38
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RT300M按键切换高压只显示140V，滤波电容有300V,版主能指导一下怎么处理吗

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jiadianwx
 Author| Post time: 2026-9-20 12:52:56
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外围都检查了，没有办法只能求助了
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Post time: 2026-9-24 14:43:37
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先取下丝印为3D或3Z的贴片三极管，如果取下后电压恢复显示300V+，那就换它就行。如果还是升不起来，测试次级整流滤波后的电压是否300V+，如果是就换4个的MOS管。
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