So the deal is that my friend brought me this portable bluetooth speaker with cracked micro usb port. I thought it woul be better to replace it with mini usb so it wouldn't break so easily (and also because i didn't have any micro usb connectors)
Step 1: Where to Start
so, first step is to remove speaker grills from both sides of the speaker. Use needle or some tool similiar which can fit to the holes and lift it so you can get a screwdrivet under it. Then just go around with screwdriver and those should come out pretty easily.
Step 2: The Next Step
Now it should look like in the photos above. Remove all the screws and take off the plastic part shown in the picture. Then the rubber casing should come of easily.
Step 3: Meet the Circuit Board
on top you'll see the panel with buttons like shown above. remove the screws from it. Take it off and you'll see the circuit board. take off the tape running around the speaker.
Step 4: Opening It Up
Then take off the screws in the corners (first picture) not the ones keeping the speakers on place, and you should end up with something like in second picture.
Step 5: Finding the Issue
Now this red box is the thing we are interested in. Unscrew it and try to take it off gently. It has some glue in it so it might be little harder to take off. In my case I was little violent and it got little damaged. After that you'll see the circuit board and the connectors. Unscrew the circuit board and take it off.
Step 6: Connector Installation
now in the circuit board, take off the old usb connector gentu by soldering, then solder the new connector to its place. you dont have to care about the middle pins on the connector, only the left and right and the connector case.If you look carefully you'll see that there is only two connection areas on the board, one for ground and one for voltage. Because pinouts of micro-usb and mini-usb are the same, you can solder it straihgt to its place. mini-usb is silght bigger than micro-usb but it will fit. just check that the right pin is connected to its place. the most left pin is not so important, it should just be attached to ground with the connector case. Make sure that there is no connection between ground and the voltage. The case should be solder well to the circuitboard becouse it will keep it on place.
If you use mini-usb instead of micro usb you'll have to make slight changes to the speaker casing (third pic). I made my with shap knive but you can use dremel or something like that.
Step 7: Put It Back Together
then screw it all bac together and it's done. You should put the tape around it like it was in a first place and try to keep it as irtight as possible, it has an effect to the sound, especially bass tones.
Thanks for viewing I hope this was useful. Please leave feedback so I can improve my skills and make better instructions for you.