Recent content by grandpatzer

My soldering tip is a bit too big for this job, it took me long time to solder it, I might remove the transistor and hopefuly it works without it there. Also I think the transistor is not same as the old one because it's physicaly much smaller...

I finally recieved the transistor and soldered it in, bad news seems when I measure with multimeter I'm not able to get correct readings... only Black purple gives me good readings: Black Purple: 5.17v on level 20v on multimeter. Black Red on level 2000m: 0019 Black Red on level 20v: -0.02...

thanks that makes sense, Phaedrus suggested me the transistor, he was not 100% sure about it, however I know he knows about psu's so I'm hoping he's correct about the transistor. I have ordered the transistor should have it next week. post17 regarding the transistor...

So on another forum a user suggested me a transistor which seems like he knew was the correct one. Are these correct steps for me now? I have ordered the transistor, I should have it nextweek for soldering :) I want to be sure to have tested as good as I can before installing my PC components...

On another forum a user thinks the LG is label for Toshiba, 2SC2712, according this manual the G stands for DC current gain hFE. Toshiba datasheet In that case I think a BC846 Transistor might be correct? There is 3 transistors on Elfa, difference are 330mW, 250mW powerdissipation, and marking...

you clearly lack any reading comprehension but anyway thanks for trolling me :p

so on another forum I was told it could be a NPN transistor, still not sure if its PNP or NPN. however Elfa has 26 different NPN transistors and they are all rather cheap: https://www.elfa.se/elfa3~se_sv/elfa/init.do?toc=19098&name=transistorer_med_integrerade_motstand

this one: http://www.rwlabs.com/article.php?id=572

sadly the transistor says nothing else besides LG, I think it's possible it's that LGE company that makes them, unless it's the actual big LG (smartphones, tv's etc). I actually own two glue guns, one specified 170celsius and one mini low heat glue gun specified 95celsius. I only have glue...

That alibaba link could very well be it, I'll read that link you posted and try to measure with multimeter the "healthy" transistor that is on the PCB bottom in soldered, I think the loose transistor will be difficult to measure with my multimeter. I have a cheap multimeter. I don't live in...

So if I do those measurements without the transistor installed and all shows correctly I have a working PSU(?). Is there anything else I need to consider regarding that transistor. Thanks I know of ELFA, it's a bit long distance from me. So, I spent alot of time trying to solder it in there...

so what happens if I bridge the 3 solder points with a wire? I loose overprotection for PSU? BTW can I try the PSU without that transistor?

so how do I figure out the exact model of that transistor so I can order a new one to solder in, this one must have had it's legs broken I guess, there where no legs to solder.

Thanks, I'll take better pictures and pos in thread, as for that SMD BJT or whatever it is, is there some "trick" I can do to get this PSU going without the black square thing? Is it critical to have that square thing inside the PSU?. I guess I have to plug to wall the PSU and measure to see if...

So I finally inspected the PSU closer and found the problem mostlikely, this tiny black square "memory module" labeled LG had been ripped of the top solder point, it seemed to still be held together by the 2 bottom solder joints (so 2 bottom 1up in total) however when I tried using a tiny...