We bypassed the SCR CD430440 to measure the transformer primary input voltage, the value was ~200V as we turn on the H.V. switch. But the HV meter was 0 V. Mike guessed the rectifiers may be broken, so we removed them for detecting. We applied a +1kV DC and -20 V DC to the rectifier one by one, we did not any one was damaged. We also checked the connect of 10 k Ohm resistors, and have not fond anything wrong. The resistor for current monitor also measured, the value is 70 Ohm. Till now we leave transform and voltage divider not be checked.