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Mini USB Bluetooth FM Radio Receiver Repaired

By on December 30, 2020
mini usb repair fm

fm usb repair

Problem Reported: Songs Playing through SAREGAMA mode (playing songs through Internal Storage) is not proper. Songs are intermittent skipping and through pressing volume up & down it changes the Modes instead of controlling volume.

usb fm player repair

So for inspection I have to open the unit.

how to fix usb fm

how to repair usb fm

After opening the Unit I removed the PCB from the BOX. On visual inspection no physical damage found.

There are too many micro switches. Cleaned All the switches using WD40 Spray.

wd40 spray

Now removed Charging port PCB for Inspection.

how to fix a broken usb fm

On PCB I found One USB Pen drive is connected for internal song storage. I removed USB pen drive and connected to my PC and while checking File structure I found it showing some vague characters with file name which indicates abnormal condition.

And while playing files it does not opening these songs are in MP3 format. That means all the files were corrupted. I reformatted the USB pen drive and copy some songs from my collections. After all process now it is time to check the Unit for performance.

fm usb fixing

I have inserted the USB drive and placed the PCB on its location and turned on the unit and the unit is working perfect. Reassembled the unit after 15 Minutes of playing songs. Checked everything is perfect there is no skipping the songs and volume control also working fine.

Conclusion: USB Pen drive is got corrupted may be because of jerk / Loose connection as you see in picture there is no locking is provided. Note: Just forgot to apply hot glue to the edge of the USB Pen drive which keeps the pen drive on its place.

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 in the link below:



  1. Parasuraman S

    December 30, 2020 at 1:39 pm

    You are very honest and straightforward in your articles and that is evident from your admission of mistakes committed. A quality, every one of us should have! Many thanks for a good guidance on how to open such sets! It is a tricky way and I can perhaps some time, if and when I get a similar set for repair! All the best, dear!

    • Yogesh Panchal

      December 30, 2020 at 9:20 pm

      Thank you! sir
      Fooling ourselves is dangerous disease & admit mistakes keep us awake & will trigger our mind on similar situation.

  2. Albert van Bemmelen

    December 30, 2020 at 7:03 pm

    These USB memory sticks are still a kind of mystery even if we know how these NAND memory chips are addressed by their each unique USB controller IC's. Because we still never can be sure when they quit working, corrupt their data or why they sometimes are completely undetectable on certain USB ports. So good thing you managed to skip out anything that was not the reason of causing this MP3 player problem.

  3. Yogesh Panchal

    December 30, 2020 at 9:36 pm

    Albert, Most of the time problem occurs when removing USB device without turning it off or still it is in the process in background if using in laptop or PC it is always remember to remove the device by "safe to remove hardware"Process or chances are high to get your USB Pen drive from Fat32 to RAW File System.

    • Albert van Bemmelen

      December 31, 2020 at 3:47 am

      I know dear Yogesh, but still many new SD cards and USB memory sticks have very peculiar characteristics. Like if I order 10 identical 16GB SD cards from a seller and check each of them in an SD to USB reader adapter they all just work fine. But when I plug each of them directly into an SD card reader, not all of them seem to work without any problem? And it probably also depends on the controller inside the SD adapter reader, and maybe on the reading speed of the controller chip?

  4. Waleed Rishmawi

    December 31, 2020 at 7:24 pm

    a job well done on the repair. you went the extra mile to help your customer out, very commendable. keep up the good work

    • Yogesh Panchal

      January 5, 2021 at 12:17 am

      Thanks! Waleed

  5. Humberto

    January 4, 2021 at 11:33 am

    Good idea by applying hot glue to the USB Pendrive. Thanks a lot for sharing so interesting article.

    • Yogesh Panchal

      January 5, 2021 at 12:18 am

      Your welcome! Humberto


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