| 故障表现为：热机自动关机 维修与分析：维修分析热机自动关机,将板装在机器上测试观察,果然热机后自动待机,开机测U23.3VU3是2.5V正常测试是2.6V地正常,U41.2V各组电压正常,自动关机后这些电压也是有,换软件,故障依旧,经以上判断怀疑是U12MST6M181VS处理IC不良造成,更换U12MST6M181VS,开机测试观察,故障再没有出现. |
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