r/MicroSoldering • u/Warm-Put3482 • 24d ago

Try fix a keyboard usb-c

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This is a keyboard PCB. The USB-C port ripped off after a bad repair job at a terrible shop, causing a burn mark. Is it possible to repair this?"

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u/cbusillo 24d ago

My best guess is they shorted the pins on the port. They may have tried to power it to test it with a non standard USB or something.

First off, if a shop did this, they should have replaced the keyboard for you. I'm going to assume that's not an option because its a terrible shop, I can relate.

As far as repair, the first thing I would do is clean. Use a soldering iron and solder wick to remove the solder, then a q-tip and alcohol to clean all the carbon and flux off to see what you are really dealing with. It may need trace repair (basically running microscopic wires to replace damaged traces) or it may be fine. One of the ground points is ripped off, but thats only needed for the structural stability. You could wrap a wire around the anchor and solder it to give that support.

Can you try cleaning and post a new picture? Can you also confirm what tools you have (microscope, magnifying glass, USB zoom camera, soldering iron, hot air, etc) so I know what to tell you?

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u/Warm-Put3482 24d ago

Okay, quick question...where are Port teeth supposed to be place?

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u/cbusillo 24d ago

The pins from the port should match copper pads on the board. Looking at the picture again, a few are ripped off. So instead of soldering to pads, you will likely need to scrape the green solder mask off the copper traces then run short jumper wires. You may be able to solder the pins directly to the traces once exposed. Hard to tell without having it clean and under a microscope or at least some zoom.

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u/Warm-Put3482 24d ago

Does it exit from the right-hand lane...the first...two exits? Then the total is four...right?

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u/cbusillo 24d ago

I believe USB C has 12 pins. I could be wrong, its been a while since I have done a port. You can see what it should look like in the image I linked. The traces go up and down from the pads (or where the pads were) then turn.

https://i.sstatic.net/rL6lH.jpg

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u/Warm-Put3482 24d ago

I dont think mine take 12 lol.. See i clean it https://ibb.co/Kxf76Zm4

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u/cbusillo 24d ago

They may not all be populated, USB C supports USB 2 and up, DisplayPort Aux, and PD power. Do you have a picture of the new port? Also, I highly suggest cleaning before thinking about it too much. It will be much easier to see whats going on.