| 如果乐视X4-55C液晶电视不能连接蓝牙。该故障的检修思路与《乐视X4-55C液晶电视不能连接无线WIFI的维修思路》一文基本相同，先检查同轴天线与主板的连接是否正常，再测量模块的3P3V_WIFI (3.3V)、BT_ REG_ ON (测试点为U1303的29脚，正常时为高电平)电压是否正常，接着检查电阻R1347、R1348处的USB _2D-、USB_ 2D+信号是否正常，最后更换模块U1303。 |
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