Working on a plasma TV trying to ID a through hole component

[TT_Vert]

I have a short to ground on my Y sustain board and i'm trying to go through it w/o a schematic as i don't have one. I've found one component that looks like an unmarked diode but has continuity through it both ways so it's not a diode. Took one out of circuit and same deal. There are no markings on it and the board has them labeled FL410-FL430 or something along those lines number wise.


Any help would be appreciated

 

[ransil]

Filter

Sent from my SM-G960U1 using Tapatalk

 

[Bigbandguy]

Short to ground sounds like a cap somewhere. A lot of those sets have "just good enough " caps and tend to fail fairly early.

 

[Sokoloff]

Might try over at EEVBlog forum. It’s the electronics version of GJ.

 

[BillK]

You can get a complete schematic / service manual for pretty cheap at the Sams website. It is a download. Have used it for several flat screens.

https://www.samswebsite.com/

 

[TT_Vert]

Finally got to the bottom of the shorted VS rail. There were 5 shorted IGBTs and a blown fuse. That's not to say that's going to fix the problem but it's step in the right direction. I do have a question that I'll probably present to EEVblog forums when they come back up but all 5 IGBTs are FGPF4633s but above that I have 3 different IGBT Part #s. 1B09BB, 1B09AP and 1B09CA. Does that matter? Is that just some sort of a date or production code? I've not seen any info querying those #s and looking at FGPT4633 data sheets.

Thanks
Dave

Might try over at EEVBlog forum. It’s the electronics version of GJ.

Thanks, I'm a member but the forum was down this AM

Dave

Short to ground sounds like a cap somewhere. A lot of those sets have "just good enough " caps and tend to fail fairly early.

Many of the caps are shorted to ground but aside from removing each one and testing out of circuit how can I test them? None look bulged but given most of them are shorted to ground I cannot ID any one bad cap causing the short to ground.

Filter

Sent from my SM-G960U1 using Tapatalk

Could you elaborate some so I can research how to test them?

 

[American Locomotive]

How do you know the caps are shorted if you haven't removed them from circuit?

Is this tv really even worth repairing?

 

[htmdude57]

If you haven't already found out: My guess on your unknown component is that it is a ferrite bead. Basically a piece of wire with a charcoal-like cylinder molded onto it. It acts like a coil/inductor/filter at super high frequencies. Since it is such a simple component, it is unlikely that it is not working correctly, unless it is chipped, cracked, or broken.
https://www.electronics-notes.com/a...nductors-transformers/ferrite-bead-chokes.php
http://www.electricalbasicprojects.com/ferrite-bead-tutorial-applications-advantages/