Thank you very much for the answers! I bought new FETs straight from Farnell now that they are in stock again. I´m gonna try to swap them out first and if they're still overheat I´m definitely trying the increase dead time option.
I have double checked that I´m using non conductive heatsink compound, and it´s no problem with the original FETs and my compound, but I´ll pick up some more just to be sure since I will need some for my computer as well.
I will keep you posted with the results but it might take some time before I find the spare time to experiment with this.
I have double checked that I´m using non conductive heatsink compound, and it´s no problem with the original FETs and my compound, but I´ll pick up some more just to be sure since I will need some for my computer as well.
I will keep you posted with the results but it might take some time before I find the spare time to experiment with this.
Long time no see but I finally have a result that I can share with you. I replaced the FETs that I ordered from Farnell and I'll be damned but they worked straight out of the box!! 😀 So much for fiddling around with different FETs. I had no higher hopes that the FETs from Ebay was genuine but I'm a bit surprised that the ones from Cricklewood electronics didn't work as well.
I want to thank everyone involved coming with suggestions and a big thanks to check12 for not giving up on me 😀
Cheers everyone!
I want to thank everyone involved coming with suggestions and a big thanks to check12 for not giving up on me 😀
Cheers everyone!
Excellent news. I have bought a nx3000d used which is on protect as soon as I turn it on. I did some inspecting and one of the pesky little 4227s was shorted onn all 3 pins. Reading this thread has given me high hopes on this repair (my first too). My only question is, how come these get shorted and why does it cause protection mode?