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故障现象1:开机按透视键,监示器上无图象,KV、mA表上无指示。 故障检查:根据上述情况,需要区分故障是发生在高压发生器输入部分,还输出部分,用万用表对初级T_1、T_2进行测量,经测量T_1、T_2输入端无电压,说明故障发生在高压输入前部,由于T_1、T_2是主电路中可控硅的输出端,因此测量可控硅的输入端L_1、L_2,测量L_1、L_2有220V电压,然后在透视状态下测量可控硅的触发极K_1、G_1和K_2、G_2,结果无触发电压,而K_1、G_1和K_2、G_2触发电压是在sec CONTROL(秒控制)电路中,所以检查秒控制电路,主可控硅触发电压是由
Symptom 1: When the camera is turned on, there is no image on the monitor. There is no indication on the KV or mA meter. Fault check: According to the above situation, it needs to distinguish faults that occur in the input part of the high-voltage generator, and also output part. Use the multimeter to measure the primary T_1, T_2. After measuring the voltages at the T_1 and T_2 inputs, it means that the fault occurs before the high voltage input. Department, since T_1, T_2 are the output terminals of the thyristors in the main circuit, the input terminals L_1, L_2 of the thyristors are measured, and the L_1, L_2 voltages are measured with 220V, and then the trigger electrodes K_1 of the thyristors are measured under the see-through state. , G_1 and K_2, G_2, the result has no trigger voltage, and K_1, G_1 and K_2, G_2 trigger voltage is in the sec CONTROL (second control) circuit, so check the second control circuit, the main thyristor trigger voltage is