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5V DC Power Supply Module Repaired

By on November 4, 2021
power supply repair








A friend of mine who is hobbyist and sometime he use to do some house hold repair job also. He sent me one power supply module for repair used in digital media player.

how to fix 5 volt power supply

I connect the module on mains power and measured o/p voltage there is no O/p voltage.

So I removed the module from main line and started cold testing component one by one.

        how to repair 5 volt power supply

Rest of all components are in normal reading on testing.

Hence arranged the components for repair, all are from my salvaged components box.

how to fix power supply

After replacing the components I have connected the module to series lamp and it shows positive result on module O/P Led Indicator is light up.      power supply 5 volt fix and repair

So here I have replaced components are Zener Diode,Fusible Resistor & Switching Diode.

Now module is revived and ready for pickup.

This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.

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Note: You can check his previous repair articles on LED Bulb Repaired




  1. Parasuraman S

    November 4, 2021 at 1:36 pm

    An expert fix! Many thanks for sharing.

    • Yogesh Panchal

      November 9, 2021 at 9:04 pm

      Thank you!Sir.

  2. Albert van Bemmelen

    November 4, 2021 at 1:37 pm

    Nicely done repair job on this power adapter with MJE 13003 transistor that doesn't use any pwm controller chip but instead is using the transformer as active converter.

    • Yogesh Panchal

      November 9, 2021 at 9:06 pm

      some time Circuits works well beyond the logic.

  3. Waleed Rishmawi

    November 4, 2021 at 3:56 pm

    a job well done my friend. keep up the good work and be blessed today

    • Yogesh Panchal

      November 9, 2021 at 9:07 pm

      Thanks! waleed.

  4. Imoudu Onwumah

    November 5, 2021 at 12:15 am

    Good job friend.One thing I am yet to understand is how smps having no pwm, just one bipolar transistor on hot side operate.have a good day.

  5. Yogesh Panchal

    November 9, 2021 at 9:19 pm

    Imoudu Onwumah

    Bipolar Transistor can be used for switching or amplification.may be the equipment's other circuit which controls micro processor will take care of PWM.


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