Don't Miss

AC DC Adapter Cell Phone Wall Charger Repaired

By on November 30, 2020
AC DC Adapter Cell Phone Wall Charger Repaired








This AC DC DC Adapter Cell Phone Wall Charger with no brand and model SM-600B was brought to me by a fellow-worker and the complaint was his Cell Phone was not receiving any charge from this device.

ac dc power adapter repair

There was only one screw to open it up.

how to open power adapter

Then the device was open.

how to open a power adapter cover

As you can see, there was not any complex circuitry. When the components were examined at simple sight there was not any burnt component, not any bulged e-cap, etc., etc.

So it was time to check on the PCB for the other side.

dry joints in usb port

Of course there was not any Vout, the USB port had many cold solder joins, so this USB port was extracted from the PCB.

how to repair power adapter device

The pins of this USB port were cleaned to achieve a better soldering later on. It was inserted again in the PCB and re-soldered with fresh tin.

how to fix and repair power adapter

It’s now time to check on the Vout with the Digital Multimeter.

how to fix a 5 volt power adapter

As you can see in the photo above  there was Vout.

This was an easy repair but anyway: another device saved from the dump.

This article was prepared for you by Humberto Rodriguez, one of our ‘Master Authors’ from Cuba.

Please give a support by clicking  on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.

P.S-  If you enjoyed reading this, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!

Note: You may check his previous repair article in the below link:




  1. Chad Jessup

    November 30, 2020 at 2:39 pm

    Removing the USB port to clean the pins was a great idea!

    • Humberto

      December 16, 2020 at 12:30 pm

      Of course, you are 100% right

  2. Albert van Bemmelen

    November 30, 2020 at 2:58 pm

    Not to be able to charge our phone can be a real disaster, and even become a matter of life or death. So a good job done fixing your colleague's device.

    • Humberto

      December 16, 2020 at 12:30 pm

      Thanks Albert

  3. Waleed Rishmawi

    November 30, 2020 at 3:42 pm

    long time no hear from you. good repair article. thanks for sharing.

    • Humberto

      December 16, 2020 at 12:31 pm

      Thank you Waleed

  4. Parasuraman S

    November 30, 2020 at 5:42 pm

    Well done! Good job there, dear! Thanks for sharing!

    • Humberto

      December 16, 2020 at 12:32 pm

      Thanks Parasuraman

  5. Yogesh Panchal

    November 30, 2020 at 5:55 pm

    Good Repair Humberto

    • Humberto

      December 16, 2020 at 12:33 pm

      A simple repair, but the device was saved

  6. Henrique J. G. Ulbrich

    December 1, 2020 at 7:39 am

    Mui bien, Humberto

    • Humberto

      December 16, 2020 at 12:34 pm

      Gracias mil, Henrique

      Thanks a thousand, Henrique


    December 1, 2020 at 10:15 pm

    Muy buen trabajo, simple y directo.
    Very good work, simple and direct.

    • Humberto

      December 16, 2020 at 12:35 pm

      Gracias Hector, al menos se pudo salvar el cargador.

      Thanks Hector, at least the charger could be saved.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.