Firstly, before troubleshooting, it is necessary to understand the working principle and basic structure of the DC power module.

DC power modules are usually composed of input terminals, output terminals, inductors, capacitors, transformers, rectifier circuits, etc. Common faults include abnormal output voltage, abnormal output current, overload protection triggering, short circuit protection triggering, and abnormal input voltage,etc.

The following are the troubleshooting and maintenance steps for the DC power module:

1. Check the input voltage to ensure it is normal. If the input voltage is abnormal, it is necessary to check whether the power input terminal has good contact and whether there is loose contact or burning at the input terminal.

2. Check if the output terminal is wired correctly and if there are any short circuits or open circuits. If there is a short circuit or open circuit at the output end, it is necessary to repair or replace the output wire.

3. Check if the output voltage meets the set value. If the output voltage is abnormal, it is necessary to check whether the diodes, capacitors, transformers and other components in the rectifier circuit are working properly.

4. Check if the output current exceeds the rated value. If the output current is abnormal, it may be due to excessive load or triggering of the output current protection circuit. Check if the load is too heavy. If the load is normal, check if the output protection circuit is working properly.

5. Check if there is overload protection or short circuit protection triggered. If there is a triggering phenomenon, it is necessary to check whether the load is too heavy or there is a short circuit phenomenon, and repair the corresponding problem.

If all the above steps are normal but the problem cannot be solved, it may be necessary to replace the damaged electronic components. It is possible to check for damage to components such as diodes, capacitors, and transformers in the rectifier circuit, and replace faulty components.

It should be noted that the power supply needs to be disconnected during maintenance to avoid the risk of electric shock. If you are not familiar with circuit maintenance, it is best to hire professional technicians for repair to avoid accidents.