L.G. 42PC1D, dark flickering pic.

[Alastair E]

Re: L.G. 42PC1D, dark flickering pic.

Ah--Although--whats the 5V that comes from the same DC-DC converter driving?
--Its a separate 5V supply from the transformer, via its own rec, filter and regulator....

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

If relative to -Vy then I'd say it's for the buffers.

[Alastair E]

Re: L.G. 42PC1D, dark flickering pic.

Ah--yes, Think its reffed to -Vy, next time the sets in bits--I'll take a look! Still working well at the mo, Given my 50PZ80 a sabatical, need to find why the grey-scale has gone a bit pink on it!
(It was too big for the room anyway!)

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

I have found vy one this one side I have -193 and the other 0v

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

Ah--yes, Think its reffed to -Vy, next time the sets in bits--I'll take a look! Still working well at the mo, Given my 50PZ80 a sabatical, need to find why the grey-scale has gone a bit pink on it!
(It was too big for the room anyway!)

Unrelated but 50PZ80: if red or pink tint, check LVDS cable is fully seated. My cheap 46PZ80 from eBay with love was fixed that way

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

I have found vy one this one side I have -193 and the other 0v

Yep so that seems OK now see if you can find Vsc around 120 to 150V IIRC on these panels.

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

Vsc on one side is show in from 3.86v to ov up and down

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

Here ?

[Alastair E]

Re: L.G. 42PC1D, dark flickering pic.

Thats it--Measure across that red film-cap.....

BTW--Adam--If you decide to scrap that 42PC1DA, I'll buy the faulty boards off you to do some more experiments on the IPM's--Or if you replace the boards I'll buy your old faulty ones--so long as they aint too much!.....
--I dont want to mess too much with my set as-is, because its working well.....

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

I have its above

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

OK now pull buffers out, does Vsc return or is it still bad?

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

Yer its the same

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

Bad Y-sustain - Vsc low then.

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

Is it fixable or get a new one?

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

I'd say it's one of those DC DC packs which you might be able to nick off a bad board.

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

One of the red packs ?

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

No... the little PCBs that have a transformer on them, one for -Vy one for Vsc

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

Ahh the ones that are vertical off the board

[tom66]

Re: L.G. 42PC1D, dark flickering pic.

Yes. I don't think they're interchangeable unfortunately, you would need to find a Vsc pack for Vsc replacement.

[adamp91gvm]

Re: L.G. 42PC1D, dark flickering pic.

Is it on the board what one is for what ?