Hi all.
I got a LG TV model 50PG1000 for free from a friend. He said, "If you fix it, it's yours!"
Well, I though it was going to be something easy, like a bad cap or shorted diode on the PSU...but nope
The TV's led powers on (green) but no image.
I have read about PDP servicing for a week or so, in my spare time (that means 15-20 minutes a day...), so:
I disconnected the upper Ybuffer board, and after powering it, some kind of image comes out after 1-2minutes. All almost white and lots of strange dots moving everywhere (noise?).
I put a jumper on the EX_AUTO_GEN pads to enable the test pattern generator.
The white comes ok, the red also seems good. The green and blue have some noise dots. And the coloured images shows washed out.
The colours bar pattern appears but also looks weared out.
I made a small video, I hope it helps.Check 1080p for better quality
http://www.youtube.com/watch?v=pHpRsoFX6Uc
By the way, I've worked some years with electronics, but never with plasma displays, so I'm used to multimeters, oscilloscopes, serial ports, JTAG...but I'm a completely noob with this
Cheers everybody
I got a LG TV model 50PG1000 for free from a friend. He said, "If you fix it, it's yours!"
Well, I though it was going to be something easy, like a bad cap or shorted diode on the PSU...but nope
The TV's led powers on (green) but no image.
I have read about PDP servicing for a week or so, in my spare time (that means 15-20 minutes a day...), so:
I disconnected the upper Ybuffer board, and after powering it, some kind of image comes out after 1-2minutes. All almost white and lots of strange dots moving everywhere (noise?).
I put a jumper on the EX_AUTO_GEN pads to enable the test pattern generator.
The white comes ok, the red also seems good. The green and blue have some noise dots. And the coloured images shows washed out.
The colours bar pattern appears but also looks weared out.
I made a small video, I hope it helps.Check 1080p for better quality
http://www.youtube.com/watch?v=pHpRsoFX6Uc
By the way, I've worked some years with electronics, but never with plasma displays, so I'm used to multimeters, oscilloscopes, serial ports, JTAG...but I'm a completely noob with this
Cheers everybody
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