Anyone know what causes this fault?

[Hamie]

Im guessing panel but never encountered it as bad on a relativley new tv.

[selldoor]

Re: Anyone know what causes this fault?

Pictures are posted incorrectly thumbnails only

[tom66]

Re: Anyone know what causes this fault?

Plasma, LCD?

[Hamie]

Re: Anyone know what causes this fault?

Plasma, LCD?

Plasma

[tom66]

Re: Anyone know what causes this fault?

Would need a bigger picture to be certain, but that looks like a Z-sustain fault. Panel is probably fine.

[Hamie]

Re: Anyone know what causes this fault?

[tom66]

Re: Anyone know what causes this fault?

What's the model # of the TV? Definitely looks like a Z-sustain fault.

[Hamie]

Re: Anyone know what causes this fault?

Cheers tom it's ps42b450

[tom66]

Re: Anyone know what causes this fault?

Yeah, I fixed exactly the same fault. I replaced the X-main on mine, but I think there is probably a simpler fix. Do you have an oscilloscope available?

[Hamie]

Re: Anyone know what causes this fault?

I don't actually own the tv!
Just got the guy to email me pictures of the fault.

May aswel buy it. Out of interest did you replace the x and buffer? Or just the x

[tom66]

Re: Anyone know what causes this fault?

The "X-buffer" is just a piece of connector block, it has no electrical function.

[mmartell]

Re: Anyone know what causes this fault?

What do you think may be the simpler fix, tom ?

[tom66]

Re: Anyone know what causes this fault?

Replacing the Xe FETs (2pc) and/or driver IC.

[Hamie]

Re: Anyone know what causes this fault?



Well it's fixed.
Turned out to be bad solder on the x-main.

All good.

[tom66]

Re: Anyone know what causes this fault?

Good to hear. That's a new one, not seen bad solder joints on one of these before.

[markfreddy]

Re: Anyone know what causes this fault?

sorry to dig up an old thread but im having simmiar problems with a ps42b450 Samsung 42" plasma. when i place a little pressure on the y sus y buffer join it can go away for hours and return days or hours or minutes later. any help?

[Alastair E]

Re: Anyone know what causes this fault?

sorry to dig up an old thread but im having simmiar problems with a ps42b450 Samsung 42" plasma. when i place a little pressure on the y sus y buffer join it can go away for hours and return days or hours or minutes later. any help?

Pull the Y-SUS board and check for dry-joints....

[markfreddy]

Re: Anyone know what causes this fault?

I will be heating up the soldering iron tomorrow. i have seen a working y sus on ebay i will buy.

[omendata]

Re: Anyone know what causes this fault?

Aha thats the problem i have - confirmed its the z-sus!

Looks like yer z-sus board didnt last too long Hamie but thanks for coming out to the flat to help me out and donate the board it was appreciated mate!