ugly but functional fix on damaged FORD PCM after high voltage feedback from ignition coil system
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- Опубликовано: 26 янв 2022
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I've changed MOSFETs in power supplies of flatscreen TVs that looked like that. Be careful with the heat!
So, power part overstress, part shorted, part cooked, and sense resistors cooked. If you look at IPC repair production procedures they are about repairing the PCB, meaning traces, solder mask, etc, and not repairing field returns (field returns are based on IPC procedures but with added procedures).
If you get qualified for IPC 7711/7721 you are trained in how to best repair the actual PCB. You could reuse the foil but you would have to first remove part of the damaged FR4 with a Dremel like tool and a die grinder tip to get better access to the power vias for soldering and a better surface for pad adhesive. You want to expose more of the via side area before soldering to the old foil pad after it has been glued in place. You can actually glue a new signal trace in place of the old one before soldering instead of a tinned wire, for any exposed areas you would cover with solder mask. The most diverse PCB repair, in my opinion, is in prototype production runs. The repairs can be very intense where you have to use a micro drill press and specialized jigs.
If the failed DPAK power part is not needed for testing, I just use a very fine flush cutter to cut the part leads before de-solder. It is better than lifting the lead which may slightly delaminate a pad.
The secret to adding the proper amount of solder paste to these older thermal via designs is to use a controlled paste dispenser. It will dispense a very controlled amount of paste per a panel setting. Once you figure out the best setting for the pad in question, it is very easy to add the exact amount of paste every time. Just dial and shoot, it is very fast and repeatable.
If you preheat the board the soldering will be much easier with less thermal stress.
Wow, you made this look easy. Well done.
Amazing work! Thanks for sharing.
Nice job🤗, Thanks for sharing. Two questions what’s the green stuff and where can I get the transistor. Thank you.
I usually get parts from mouser. The green stuff is solder mask. s.click.aliexpress.com/e/_9HwKmC
Excellent work, thanks for the information on the replacement part number, I have searched like crazy because I have one completely destroyed and it couldn't be seen, I have a question, did you make or buy that tester? Thanks again
I make most all my testers.
Ive seen worse, Great job.
Sensei another great one again... Can you give me an insight on the things you did to check ?
These are just replacing coil system. Dont need to test much. Its always the same.
What do you call to the green material/liquid you used. Its like a non-conductive material covering the pcb.
The green stuff is solder mask. s.click.aliexpress.com/e/_9HwKmC
Is that from an early 2000's T-Bird? It certainly looks like mine. I think that I need your help.
no its from an escape.
There is not much success repairing those older Tbird ecu's for the tranny problems sorry. I stopped taking them cause there is just not much I can do with them.
Did you build that pcm coil driver tester or purchased is?
I build them for fun when I have free time. That one is a bit universal but usually I like to make them module specific.
Hi mate what is the common cause for
No crank
Security light staying on
Throttlebody clicking
Cheers in Advance
probably some type of wiring grounding issue.
جيد
Hi sir, can you help me for the repair ECU ford explorer 2007 DTC P0740-FF TCC circuit error. Pleasee
I need information location IC pin no 34 (TCC) torque converter cluch (circuit error)
I dont have any notes for that sorry
Can you repair ford 6.0 powerstroke pcm's?
Sure, what issues are you having with it?
I have two one is a crank no start and today the other one decided that it was going to lost communication with tcm
?
Hard to say with out looking at them sorry@@swflpowerstrokes2944
We're are those drivers sold and all the other pieces needed. Can you send me the info. Thanks
I usually buy from mouser
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