How to remove pcb hdmi easely  - Page 1
Forum section: electronics / repair

author: Serge125
author_rank: Regular Contributor
timestamp: March 09, 2021, 09:40:27 am
content: Hi all!!! I'm trying to remove this hdmi pcb and no luck at all. I use rosin flux with a disordering braid no luck, I tried my trusty disordering electric pump no luck here either so what is the secret to remove these easily??? I don't have a heat gun (yet) so I know that it would of been easier so I'm stuck with the basic tools. Is there a specific temperature for my soldering iron, I have a hakko FX 888D and I have the org chisel tip on it. Any help with this would be VERY WELCOMED!!!THANKS!!Serge

author: janoc
author_rank: Super Contributor
timestamp: March 09, 2021, 10:51:37 am
content: Quote from: Serge125 on March 09, 2021, 09:40:27 amWith what you have there is no easy way to remove this. Hot air (please, use a proper hot air station, not hardware store "gun" for stripping paint!) would work but you would likely destroy the connector in the process (the plastic melts). Possibly not a concern seeing the state of the connector already. You could also try to snip the mechanical support pins on the sides off using a pair of cutters and then desolder the rest.Solder suckers and braid are of no use here, you need to heat all the pins at once, including the mechanical pins that are holding the connector down and are soldered into a ground plane (so sucking away the heat).The best way to do this is a hotplate/preheater. Preheat the board from the bottom and let the solder melt. Then you should be able to pull the connector out easily. And even better way is to preheat the board just below the solder melting using the hotplate and then quickly hit the connector from the top by hot air, it should pop right off.I have recently got a tiny MHP30 preheater for doing just this type of work - localized rework without having to heat the entire board.Without a preheater there is a chance that you could get it off by heating the board from the bottom using hot air only but it is very likely that you will scorch the board and the connector will be still stuck due to the ground plane wicking/blocking the heat away.Oh and keep in mind that you may have a drop of glue under the connector too - that is sometimes done to secure the connectors to the boards for wave soldering and to prevent them being ripped off the board by people plugging and removing the cables.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: March 09, 2021, 06:08:48 pm
content: Tough job, but not impossible. Main question, why remove it? I can see the damage, but I assume that was from attempting to remove it.My approach would be a multiple iron/two person approach, bring immense heat to the right places quickly and let the thing fall off.Otherwise you may damage traces.You'd be surprised how delicate you can be with this

author: perieanuo
author_rank: Frequent Contributor
timestamp: March 10, 2021, 02:06:31 pm
content: dremel/proxxon the connector metal case with care and remove it, then with some big solder blob and >=60W soldering iron, piece of cakeno need for expensive stuffwith hot air it's easy if you know the technique, covering with alu foil and leaving open just the connector, but takes experience, the pcb mustn't be overheated

author: Serge125
author_rank: Regular Contributor
timestamp: March 10, 2021, 07:40:02 pm
content: Hi there and thanks for your response!!Quote from: janoc on March 09, 2021, 10:51:37 am

author: Serge125
author_rank: Regular Contributor
timestamp: March 10, 2021, 07:41:58 pm
content: Quote from: Alex Eisenhut on March 09, 2021, 06:08:48 pmThanks but I'm alone with this project but was able to get it off with a shop heat gun set on low!!THANKS!!

author: Serge125
author_rank: Regular Contributor
timestamp: March 10, 2021, 07:42:51 pm
content: Quote from: perieanuo on March 10, 2021, 02:06:31 pmWas able to remove it with a shop heat gun set on low.THANKS!!