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View: 1264|Reply: 2

户户通搜不到台是怎么回事?

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Post time: 2021-6-12 12:12:39
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一台处处通卫星机顶盒,主板5V、21V、3.3V、1.25V、2.5V等供电正常,数字显示正常,红色或绿色指示灯不亮,恢复出厂设置后无信号强度和质量(馈线到高频头及方向完好),自动搜索搜不到台,遇到好几个类似的毛病,不知怎么解决。主芯片从新植锡焊过。
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Post time: 2021-6-12 14:15:56
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单电源供电LM317极化切换??~~~通病就是贴片电容坏
上主板图看看
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Post time: 2025-11-23 18:45:01
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同样的问题  楼主解决了没有
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