Re: 42PB4D-AA Power PCB VS 4A fuse blowing - suggestions?

Cheers tom66 exactly the information i was looking for

Re: 42PB4D-AA Power PCB VS 4A fuse blowing - suggestions?

Hi guys so after some futher testing, and a bit clearer head the FETs that i believe are dead are marked W20NK50Z all pins goto zero on the dmm from the data sheet its marked as a 500v 17A N-Channel FET

does this sound right?
can anyone confirm if i need to check any other circuitry surrounding this?

cheers for any help in advance

Re: 42PB4D-AA Power PCB VS 4A fuse blowing - suggestions?

Quick update during my lunchbreak

So ive checked the VS inputs on both the ysus and zsus. No shorts between the VS and Ground rails, The YSUS boards fuse is still in tact which im guessing is a good sign.

So on checking the FETs i have found the two tw2005 mentioned were indeed faulty (shorted) I believe. Checked them with a Metre and had a ~0 Ohm reading so that im taking as a short?

Would anything else be damaged by these two going to short?
Hoping fuse will have prevented...

Re: 42PB4D-AA Power PCB VS 4A fuse blowing - suggestions?

cheers, will start there and post results

Hi guys,

Ive got a LG 42" plasma here thats got an issue on the Power PCB, firstly ive read the basic guides put on here(very informative btw) and did a forum search before starting a new thread, but im after a little more specific advise

The first issue noticed is the power light would be on stndby at the front of the tv, pressing the power button or applying power you could hear a relay fire after a couple of seconds.

So the first thing i did was checked the input fuse all good, the board was so dusty at the time i couldn't even see the second...

Re: New Members - please post your introductions here

Ladies & Gentlemen, I bid you hello from Australia

searching for some hardware level repair info on an old LG tv and boom Badcaps.

Im interested to say the least.

Im a 32yo techician of many colours. at the moment working or radio and IT gear, over the years ive worked on all sorts of (i want to say stuff but alot of it can really only be regarded as sh*t).

Both Inkjet and laser printers up to full size photocopiers, PC's, Manufacturing and production plant equipment (scales...