故障表现为:不开机 分析与检修:灯亮不开机,检查发现3.3V供电正常,电源板开机瞬间有24V输出,单独测试电源板,在空载情况下,24V正常,带负载24V会保护,检查U101及24V取样电路未发现异常,最后更换变压器TS1(BCK-40-014T)后试机正常. |
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