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此例故障当断开HIC1015⑷的脚外接的行过压检测电路的D427时,开机不再保护,测量开关电源输出电压为115V(正常),去掉假负载,恢复行输出电路,出现正常的光栅和图
In this case, when disconnecting the D427 of the overvoltage detection circuit connected to the pin of HIC1015 (4), the power supply will no longer be protected and the output voltage of the switching power supply will be 115V (normal). The dummy load will be removed and the output circuit will be restored. Figure