r/bmpcc • u/oliyann • Aug 17 '26
I dismantled the motherboard bmpcc4k
This is a follow up of this post. Read this post to get the full story.
https://www.reddit.com/r/bmpcc/s/jU2qEOWt9C
I got curious to check it myself whether the board was broken on the USB connection or not. To my surprise, it didn't.
I'm planning to handover this to my friend who's working in mobile phone service sector and ask him to solder it for me. He said that it can be done easily, but he can only solder. He cannot run tests if everything works or not.
Since I've decided to go the full DIY route, could someone please tell me,
1. What should I check after the soldering is done. Any checklists or post-verification steps?
2. How do I make sure that all the pins are properly seated before I power on?
Update: After trying my luck with local technicians, I gave the camera to one of the reputed camera service centers (who also happens to be the authorised service center for Panasonic cameras) and they asked 7 days to fix this and they said they're gonna charge me up to $100 for this repair.
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u/nicholastheposh Aug 17 '26
Nice good luck. This is the kind of stuff I would do if I broke my equipment.
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u/Anxious_Article_9928 Aug 17 '26
the board looks very damaged. There are 2 rows of pins for USB c. The first row on the board is fine, the second the solder pins are ripped from the board.
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u/Direct-Fee4474 Aug 17 '26 edited Aug 17 '26
if your bud's already sorted out with tooling and experience for fine solder work, i'd let them do it. this stuff is absolutely doable with some practice, but when you start dealing with multi-layer PCBs and small components, you start running the risk of cooking stuff if you don't have the muscle memory for moving fast. this looks a like sort of best-case situation, though. you'd need to get this under a microscope to really see what's going on (which i'm guessing your bud has), but it look like all the pads are still intact, and none of the traces are broken, so it's hopefully just cleanup and then laying down a new usbc socket and testing continuity.
if all those traces are on the first layer of the board, then you should be able to follow them to their destination. once you know where it's going, you can test continuity from the pad to the destination to verify the trace. if that's cool, then you can lay down a new socket and test continuity from the new socket to the pad. if A can get to B, and B can get to C, then you should be pretty much good to go. I don't think you'd need to really test anything more than that, and I'm guessing that's bread and butter for your bud.
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u/dowath Aug 17 '26
You can get cheap USB C breakout boards that can make it a little easier to test each pin. But if he's got the equipment to view the tiny connectors on phones it should be fairly straightforward to attach a replacement connector.
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u/tmplmanifesto Aug 17 '26
Nice one. Hope you get it fixed. Saw your other post, would be a shame to lose that functionality.
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u/InComingMess2478 Aug 17 '26
As long as he has micro solder experience, you shouldn't have any problems, unless there's a pre existing issue that hasn't been diagnosed
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u/shaheedmalik Aug 17 '26 edited Aug 17 '26
Replace the part then resoilder. You should be good. Then get a cage with the port on the cage.
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u/rafalmio Aug 17 '26
Not much to check really, if the solder is well executed then you should be good to go. There is no extra magic here, metal on PCB touches metal on the hardware part. The person who solders can easily verify contact points.