Screen is Red and Black. You can see the source playing behind the red and black. Sound works. Picture attached.
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LG Plasma 50PK540-UE
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Re: LG Plasma 50PK540-UE
Looks like a Y-sustain failure or Y-buffer failure to me. I'd try checking Vsc and -Vy voltages on Y-sus to see if they're good.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: LG Plasma 50PK540-UE
You need a digital voltmeter.
Set the meter on volts DC, if manually ranging 600 or 1000V DC.
Measure the voltages and note them down.
On the back of the plasma display panel, inside the unit, is a sticker marked LG Electronics, country of origin (China, Korea, Mexico, Hungary) and "PDP50R1" for this model. You want to look at the voltages on this sticker. Typical order is N/A / -Vy / Vsc / N/A / Vzb.
They should match within approx 2V.Last edited by tom66; 09-18-2013, 10:45 AM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: LG Plasma 50PK540-UE
If those match the sticker, they look fine.
If you turn the Vset_up and Vset_dn controls, do you see any improvement in the image?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: LG Plasma 50PK540-UE
It is very hard to tell. I think it may be a Y-buffer or Y-sustain problem but I do not know. The only way to be sure is test the Y-sustain output using an oscilloscope.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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