LG PDP42X32000 panel

[fastvideo]

I pick up a 42" RCA plasma tv. It has no image on screen sound ok.
Found fuse blown and shorted ic on y board. Replace with STK795-820 and fuse, unit has image and sound now.

If I adjust the voltage according to the panel's spec, I got a red snow screen. Have to lower -VY and Vzb to minimize it, but I found the screen still has some kind of red, blue statics when image change from a bright scene to dark. Or when no video signal input.

Tested with another CTRL board, same problem, so is this a sign of aging panel or I should test it with other y and z module?????

[PlainBill]

Re: LG PDP42X32000 panel

I pick up a 42" RCA plasma tv. It has no image on screen sound ok.
Found fuse blown and shorted ic on y board. Replace with STK795-820 and fuse, unit has image and sound now.

If I adjust the voltage according to the panel's spec, I got a red snow screen. Have to lower -VY and Vzb to minimize it, but I found the screen still has some kind of red, blue statics when image change from a bright scene to dark. Or when no video signal input.

Tested with another CTRL board, same problem, so is this a sign of aging panel or I should test it with other y and z module?????

I vaguely remember wizard indicating this might be the sign of a dying panel. If you haven't done so, I'd suggest downloading LG's Quick Alignment Guide and doing the full adjustment of the power supply and the sustain cards.

PlainBill

[cadiman]

Re: LG PDP42X32000 panel

I had the same 42x32 panel. It had the same issues you are talking about. It really wasn`t that bad if you stand back about 5 feet. I set all voltages by the book and had set a good waveform on the y board. I then tried adjusting va and vs on the power supply. Changing v on the Z board didn`t help either. I seemed to be from the Y board.

I have read here where other people have had the same problem with this panel. I replaced the ic and caps( Y board). This panel was a 2006 I repaired it in 2009.

Also my panel was used for a vizio. Not the best. It was l/g, but all the heat sinks were missing from the buffer chips. Could have been some corner cutting in other areas as well.

[fastvideo]

Re: LG PDP42X32000 panel

I had the same 42x32 panel. It had the same issues you are talking about. It really wasn`t that bad if you stand back about 5 feet. I set all voltages by the book and had set a good waveform on the y board. I then tried adjusting va and vs on the power supply. Changing v on the Z board didn`t help either. I seemed to be from the Y board.

I have read here where other people have had the same problem with this panel. I replaced the ic and caps( Y board). This panel was a 2006 I repaired it in 2009.

Also my panel was used for a vizio. Not the best. It was l/g, but all the heat sinks were missing from the buffer chips. Could have been some corner cutting in other areas as well.

I bought it defective as is.
Found fuse blown and shorted ic on y board. Replace with STK795-820 and fuse, unit has image and sound now.

The STK795-820 I got from my supplier looks like old inventory.
Don't know if having the red snow problem before it was down or the STK is causing the problem.

[cadiman]

Re: LG PDP42X32000 panel

That was the same thing I ran into. I have worked on other L/G panels, but nothing made for vizio only L/G and insignia (L/G). They both had good pictures. I won`t buy any broken vizios they are just made too cheap.
I may have missed something that needed replaced on the y board. Just cause I had a picture didn`t mean I repaired it. I figured I would see a problem in the waveform.

[fastvideo]

Re: LG PDP42X32000 panel

"Adjust the voltage according to the panel's spec, I got a red snow screen. Have to lower -VY and Vzb to minimize it, but I found the screen still has some kind of red, blue statics when image change from a bright scene to dark. Or when no video signal input."


Swapped the Y board, Z board and CTRL board, to another TV. Adjust the voltage according to the panel's spec. No red snow problem.

Aging panel confirmed on this 42" RCA plasma tv!!!!!!