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Equipment Repairs => PLASMA TV forum => Topic started by: trevorsheppard on October 27, 2013,08:52:46

Title: lg 50pc1d-ec
Post by: trevorsheppard on October 27, 2013,08:52:46

Hi, got one ofthese with washed out/flickering display. You can make out osg and menus when called up. Vs and Va voltages correct. Replaced 680/50 and 1000/10 electrolytics in psu. Any ideas appreciated.

Title: Re: lg 50pc1d-ec
Post by: clark97 on October 27, 2013,14:51:10

Check your voltages at the Y and Z boards. Correct voltages for Vs and Ve will be on a sticker on the back of screen.

Title: Re: lg 50pc1d-ec
Post by: trevorsheppard on October 29, 2013,12:25:59

As the Vs and Va voltage at 192 and 60volts could it be the display is faulty?

Title: Re: lg 50pc1d-ec
Post by: watteau on October 30, 2013,03:55:47

Hi,
The FET's on the Y-Buffer's give trouble, check them for shorts,
Regards

Title: Re: lg 50pc1d-ec
Post by: downunder on October 30, 2013,04:08:03

Try the inbuilt test patterns....Disconnect the LVDS cable from the control (logic) board and place a short across the Auto Gen points P1 on the control board. If you get good clear test patterns on the screen it will eliminate basically everything except the main board.

Title: Re: lg 50pc1d-ec
Post by: trevorsheppard on October 30, 2013,04:53:26

If any of the FET's were short surely the tv would shut down? Will try that downunder  sounds like a good starting point