故障：开机显示E4不加热) 检修：开机显示E4为电网电压过低，测量电压检测电路R8(330K)、R9(330K)、R10(12K)、EC4(10UF/25V)均正常，上电测量EC4二端电压为3V偏低,试将R10(12K)换为15K电阻，测量EC4二端电压为4V，试机工作正常。 |
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