Panasonic Plasma Vertical tearing

[football0062]

Have a TH-42PX50U that has a vertical tearing issue, ive attached a pic. all voltages check out fine, was wondering if this looks familiar to anyone? Suspecting lower buffer board. any info would be greatly appreciated!

[tw2005]

Re: Panasonic Plasma Vertical tearing

yeah, that's messed up. I'm thinking along the lines of a sustain board maybe SS or SC or even sd/su buffers. That does not narrow it down much but that's my gut feeling

[football0062]

Re: Panasonic Plasma Vertical tearing

i did replace the xmain, or "SS" board. no change

[tom66]

Re: Panasonic Plasma Vertical tearing

I would check -Vad, Vsc, Vs, Va and Ve voltages.
I would suspect the SC board.

[football0062]

Re: Panasonic Plasma Vertical tearing

my vscn is off, only gettin 47, SM calls for +130V +/-4v. new SC on the way i will update when it arrives. originally thought lower buffers but noticed this set uses uppers as well and is split into 3 section totaling 6. so the chances all 6 went bad are not very likely.

[tom66]

Re: Panasonic Plasma Vertical tearing

Remember Vscn needs to be measured across the test point or from -Vad (manual should say how/where to test)
47V is plausible if -Vad is low, e.g. only -90V or -100V on older panels, as Vscan usually 150V above -Vad.

[football0062]

Re: Panasonic Plasma Vertical tearing

it was the y sustain, picture is great and my vscn is right back to +132V

SOLVED

[tw2005]

Re: Panasonic Plasma Vertical tearing

it was the y sustain, picture is great and my vscn is right back to +132V

SOLVED

nice,