Testing the PDP idea. Will it work?

[tom66]

Re: Testing the PDP idea. Will it work?

It's number 4.
VS ON jumper not necessary if TV shows any image.

[Skipfinder]

Re: Testing the PDP idea. Will it work?

Thank you Tom, I'll let you know. Fingers crossed!

[Skipfinder]

Re: Testing the PDP idea. Will it work?

Damn. The logic board test failed to light up the whole screen. I still had the black screen in the same place. I checked the ribbon cable between the logic and Ymain boards for continuity and shorts and all was OK. I wish I had a complete schematic!

Also checked the pixels as per Freakaftr8 and they are all the same.

I'm thinking that trying a new logic board is worth the $25 risk. What do you guys think?

[tom66]

Re: Testing the PDP idea. Will it work?

Due to how the logic board drives the Y-buffer I can't see this working.
The method of driving the panel is by shifting line by line down the screen using a clock and data signal, it does not address each line separately, but instead one after another.
But you said when you did the moved Y-buffer config, you got some more of the panel in the dead areas to light up?

[Skipfinder]

Re: Testing the PDP idea. Will it work?

Yes, I got activity in the dead areas. I don't have the schematics for this TV so maybe someone can tell me if the y-buffer outputs to the PDP ribbon cables are identical, i.e., is each ribbon cable pin-out config the same?

[tom66]

Re: Testing the PDP idea. Will it work?

More or less the same.

[Skipfinder]

Re: Testing the PDP idea. Will it work?

Just wanted to say thank you for all of your help and knowledge!

I found the problem to be a cracked screen under the surround. It ran vertically along the Y side of the screen. It wasn't noticeable with the surround in place.

[tom66]

Re: Testing the PDP idea. Will it work?

That was sadly what I had expected. How did the crack happen? Was the TV impacted in any way? Did you buy it like this or find it in a skip...?

[Skipfinder]

Re: Testing the PDP idea. Will it work?

I bought it that way after carefully questioning the original owner. Hard to say whether she lied or the screen glass just failed due to heat cycling and design flaw.

[Skipfinder]

Re: Testing the PDP idea. Will it work?

Thank you so much for all your help!