In high-power DC power supplies, there is a set or more than one set of rectified output voltages. Among these output voltages, if one set is abnormal, various faults may occur in the power supply. Therefore, when inspecting, we must first check for any issues with the output voltages. If the rectified output voltages are all normal after inspection, then check the operating points within the circuit. For instance, transistors have a certain working voltage between the collector and emitter, which must meet the required polarity to ensure operation in the amplification region. When the rectified output voltage of the equipment is normal, but the output voltage regulation is not, inspect the adjusting and amplifying tubes. Check if the capacitors are short-circuited or punctured, and replace them if damaged to restore the power supply to normal operation.
If an abnormality is found in a transistor, it may be due to either transistor damage or component damage. In such cases, analysis should be conducted based on the circuit schematic to address the issue. Next, inspect the surface of the equipment for issues such as broken or loose fuses, whether the terminals are short-circuited to ground, and if there's any indication of stuck voltage readings. Check for any signs of mold or burning odor in the transformer. Also, look for any evident damage to the equipment. 36V aviation power supply, 400HZ frequency conversion power supply, 115/200V power supply, 27V DC power supply, 400HZ power supply, aviation power supply
