This is how I remove and install the 4th gen charge ports. This guide picks up once the board is out of the frame.
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Step 1: First Remove Board From Frame
I'm assuming you already have the board removed from the frame and ready for the port removal. I use peel able solder mask to protect all surrounding components.
Step 2: Removal
I add chip Quik flux to all pins and anchor then use a low temp solder with my iron to add it to each pin. It helps for removal.
I then use hot air to remove the port - my station is set to 650F with a low air flow and a 3mm nozzle.
Step 3: Hot Air Works Best
One port Is removed clean all of the holes out with flux and solder and some Wic. Get it prepped for new port to be installed.
Step 4: Install New Port
I add lots of flux
Place port in place and tack the anchors down
Then one by one solder each pin.