Category Archives: Repair

A Beginner’s Guide to Check and Repair SMPS

In the older days, there were used the basic power transformer for the power supply in the electronic device, but now the time has changed. With the technological advancements, the mode of power supply has been replaced from the transformers to the SMPS. These are high technology power switches that are being used in most of the appliances, but it is not necessary that these are free from faults.

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There are not a few but plenty of things that you are supposed to know about it and one of them the process of repairing it. We are presenting you with the procedures to help you quickly develop your switch mode power supply repair skills so that you can easily repair it whenever there are some minor problems.

What can be the major problems and how to repair them?

There are basically the same problems with all the SMPS, and therefore once you understand all of them, you can repair all of them. Here are some of the major problems that an SMPS may face:

  1. One of the most important problems with all the SMPS is that they go dead, and it is the most significant reason for the SMPS breakdown. There can be a blown fuse that can be easily repaired by replacing it.
  2. When the supply of power in the SMPS goes down, and there is no fuse problem, it can be a problem with the startup circuit. In such a case, you need to change the startup resistors.
  3. There can be low and slow power supply in the circuit, which takes the circuit a longer time to get alive. It can result in a delay in the power button to respond. It can be corrected by replacing the electrolytic capacitors.
  4. When the power supply in the circuit is more than it can take, there can lead to ripple in the line of frequency. It can be easily corrected by replacing the main filter capacitors or rectifying the AC input.

Wrapping up

In the above-given points, we have described the main problems of the SMPS with the solutions to them. Make sure to keep these in mind when you face a problem with a circuit in SMPS.