Charging Problem Solved In Nameless Power Bank
This nameless, brand less power bank was brought to me by a new customer from our residential association stating that the charging port was damaged. I pried open the sides releasing the sticky tape with a plastic blade to avoid any accidental shorting. What you see in the picture above is after opening. I studied the damage on the ports and noticed that the charging port had to be replaced and there were detached pins on the two USB ports.
There were two batteries kept one top of another and parallelly connected to the board by spot welding. I cut the terminals from both sides to remove the board.
The points marked in the above three pictures are connections cracked and detached; a clear evidence of rough handling! While retouching the USB ports were easy, the replacement of the microusb was very difficult, as the pins are under the rear support pins! So, I mounted the PCB on a helping hand for further minute work:
Removing the microport was easy, but fixing the new one was very difficult and I wore special lens spectacles to do the job. Inspite of taking adequate care and precision, the port got spoiled and I had to remove it and fix another one. I used a small tipped soldering iron and first fixed the four pins and then fixed the legs properly.
Retouched the points again and ensured that they were firmly fixed. Then retouched the USB pins and ensured that these were also properly and firmly fixed. Also did patch up of a few dry solder points on both sides of the board. Then connected the board to the battery through crocodile clip wires and connected the charger and found it to be working:
Then fixed the board back in its place and rejoined the battery contacts by soldering thick cut leads of components.
Mission accomplished with satisfaction of having done a delicate work, getting added to the collection.
This article was prepared for you by Parasuraman Subramanian from India. He is 74 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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!
You may check on his previous article on Futile Efforts To Replace Polarizer Sheets In LG Monitor Model W1642S
(33)Dislikes
(0)
11 Comments
Leave a Reply
Albert van Bemmelen
April 26, 2025 at 5:24 pm
Although this was no doubt an excellent done job it was yet another one of those about fixing the terribly weak usb connectors that still are not immune to any sort of damage.
I stopped writing articles about repairing them because it is not really any news or something to learn about. And the only new problem of the new USB-C port connectors in longevity is dirt that is becoming a big problem because they easily collect dirt and are harder to clean!
Parasuraman S
April 26, 2025 at 6:44 pm
Absolutely right! I am, however, always aiming at new comers and those who are a bit hesitant to take up such jobs! I want to prove time and again that handling such small jobs also is a part of our responsibility and commitment to the field! Many thanks, dear Albert for your expert comments and observation!
Waleed Rishmawi
April 27, 2025 at 1:26 am
Microsoldering is not an easy thing to do at first but when doing a lot of these kind of repairs it gets easier with the right tools and experience .. good job on the repair and thanks for sharing
Parasuraman S
April 27, 2025 at 5:59 pm
Yes, very true! Many thanks, dear friend!
Mark J
April 27, 2025 at 2:00 am
Parasuraman Thank you for sharing . I always enjoy your repair articles no matter how small the jobs are.
Parasuraman S
April 27, 2025 at 5:59 pm
Many thanks, dear Mark, especially for your continued supportive comments!
Mick Mason
May 4, 2025 at 4:31 am
Great fix Parasuraman ! Not an easy job, thank you for sharing this.
Do you ever use a hot air gun to solder/ desolder components on these tricky jobs ? Just a thought !
Mick M, UK
Yogesh Panchal
April 27, 2025 at 4:24 pm
Good job! sir,
Since last decade some manufacturers stopped using good quality solder wire causing this type of problems.
Parasuraman S
April 27, 2025 at 6:01 pm
Yes, when the use & throw trend set in, almost everyone started making things just to last its expected life! Thanks, Yogesh Bai!
Muykit
April 27, 2025 at 6:09 pm
Good work. Charging and USB ports are weak points valnerable to damage when mishandled. So after fixing them back I prefer applying glue VERY CAREFULLY as a reinforcement measure. Indeed, a payment worthy cause.
Parasuraman S
April 27, 2025 at 9:53 pm
Yes, very true! I have bought thermal glue subsequently and might use it if needed next time. But many times I do forget a few important things here and there! Many thanks for your valuable comments!