Submitted 5 months ago by glitching@lemmy.ml to askelectronics@discuss.tchncs.de
https://lemmy.ml/pictrs/image/6c963b19-81a1-4577-b610-cfc00adfd9d6.jpeg
never had one of these, that’s a capacitor, right? also don’t know what capacitance this is, tried searching but came up short
Nothing looks burnt here, just heat marks, which would be totally expected after a few decades if the appliance heats a bit during normal use.
Capacitor like these rarely fail for no reason and if it was subject to over voltage you’d probably have a lot of other things fried, they’d be some of the last things I’d check.
I’d take the board off and try checking for the sneaky shite like tin whiskers or dry joints.
The fact that a capacitor is marked with a 1000V label does not necessarily mean that 1000V are present on its terminal (but you should use caution). I don’t think the voltage makes it out of the realm of electronics.
It’s quite hard to answer your question, as the board is quite dirty and you provided a single picture. You could check for continuity and capacitance value with a multimeter
The Yellow “Carlo DMB” is a capacitor, yes. The 1000V marking tells you it can be charged up to 1000 Volts!!! That can be dangerous!
For me it looked burned from the outside, but its hard to tell from the picture. Looks like something went very hot around it.
added top view in OP, all the other components that looked charred got cleaned up with a brush, this is the only one who looked damaged. currently waiting for the TV to empty all the capacitors before I attempt to remove the board.
Hard to tell, a couple of the other components also look dirty. Are they just dusty, or is there some residue from a blown-up part?
What device are we looking at? I’m guessing some kind of power supply? What is the failure mode You’re trying to fix?
TV power supply. added top view in OP, a buncha surrounding components were dirty as well but a brush cleaned them up. this is the only one that seems burned.
Don’t want to segue too much, but is your goal here to repair the board or to repair the TV?
Nothing really looks totally busted, but the board has several parts that look mildly rough. Like I hate that fuse, but is it just dirty? If your goal is to do your part to not contribute more ewaste to the world and learn new things, I love it, but if you just want a working TV… new boards can frequently be crazy cheap, may be a plan especially if not sure what’s actually wrong with this one.
The capacitor rating is 203j, that’s 0.02uf at 5%. It doesn’t LOOK burnt to me. Is this a CRT board?
thank you! isn’t CRT, it’s a LED TV power supply.
I’m reaching my limit here (I do small electronics) but that cap looks like it’s on the primary side of power in, so it’s rated for power line in. (Hence the high voltage rating).
What is the tv doing/not doing? If any of the LEDs (power led) turn on at all, I would guess that it’s not that side of the circuit. (I don’t know much about TVs, but these are always the questions I ask for troubleshooting)
RandomUser@lemmy.world 5 months ago
Looking at the streaks around el28, could the large blue electrolytic have failed?
LowtierComputer@lemmy.world 5 months ago
Or the orange guy next door.