FAQ

The high-voltage power supply module is not working properly. What could be the cause?

Category
Product Support

Power supply is not a device to be operated by itself, so proper operation might not be secured due to wrong operation or matching to load. Below table shows symptoms which are often considered a power supply failure. Please check these points before returning it to the factory.

Symptom Cause Check point
No output voltage Wrong connection (especially input side) Check the connection again.
Output voltage does not increase Insufficient input currentTry with proper input power supply
Capacitance of input current is insufficient
Overcurrent condition Check if voltage increase without load
Output wire is brokenCheck the conductivity
Impedance of voltmeter to measure voltage monitor is not proper Try with a voltmeter with over 10 MΩ impedance
Voltage monitor is not correct Impedance of voltmeter to measure voltage monitor is not proper Try with a voltmeter with over 10 MΩ impedance
Current monitor is not correct
There is offset
Measure with ammeter
Impedance of voltmeter to measure current monitor is not proper
Offset voltage is not cancelled Cancel the offset referring to example of circuits in catalog
Make high frequency sound Overcurrent condition Check if there is still sound with rated load or without load
Ripple noise is larger than the catalog specification Noise is add on from outside Try with input power supply with no noise
Shield the input wire
Earth at one point
Keep away from noise source