Re: Samsung ln46a650a1f won't turn on, 3.15a fuse blows



Thanks budm, that's what I was thinking as well.

The lowest ohm setting on this meter is 2000, I've got another meter that may have a 200 ohm setting, I'll see if I can locate it....

Re: Samsung ln46a650a1f won't turn on, 3.15a fuse blows

I admit I can't figure out what's going on. I've done some checks, but I can't make heads or tails of them. I didn't quite understand how Caleb was explaining to test the fets, since there are 3 terminals. I found a clear explanation of which terminal was which (gate, drain, source) but I'm floundering on how to procede.

Do I need to check all of the fets? some have all 3 terminals in line, some have the center (drain) offset, is there a difference in function between the 2 types?

I found a test procedure...

Re: Samsung ln46a650a1f won't turn on, 3.15a fuse blows

Thanks for the replies. Bear with me if these are silly questions.

Can I test the fets without removing from.the board?

Do the readings I posted above help determine if the bridge is OK or not? If not, do I just need to retest using the diode function or something else?

Thanks!

First post, so bear with me if I'm overlooking something simple, or not following board protocol.

I picked up a cheap 46" Samsung model ln46a650a1f . Previous owner bought it new, said it just died one day and they bought a new tv.

Doing some internet research, I read up on all the capacitor problems that were common with these sets, I ordered a bunch of new caps and replaced 11 of them on the power board, along with the 3.15a slow blow fuse that was blown when I got it. None of the caps were visibly bad/swollen, I just replaced them in hopes that it would be a quick...

Re: New Members - please post your introductions here

Just joined the site tonight. I've been reading up some of the threads about how to fix LCD TV's (before I registered). I'm working on a busted Samsung 46" TV that has a bunch of new caps (because that's what the internet said is always the problem), but still blows the 3.15a fuse on the power supply board. I've been doing some more research, but will likely post up a new thread looking for some guidance on what to look at next. Thanks!