The daewoo DP 42SM has ugly picture like GHOST in human. Recently, I tried to elimiate the green dots, red dot scatter around the screen, I adjust Vs, Vdd...etc, however there are still few dots on the screen, I re-adjust again, for some reason my crew driver touch the board and make the picture worst one that I ever seen, does anyone know what the problem is? did I shorted a diode, mosfet..transistor..etc? Do I need to replace the whole board, I hope I did not cause to burn out plasma elememts...Thanks for your help, please email to [email protected]
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There isn't any contrast controls on TFT screens, it's color response depends on the maker of the panel. If your PC has a Intel or NVidia graphic card, you can modify some color settings from the video driver like gamma or contrast. For NVidia cards, there is a setting called "Color Vibrance" or "Digital Vibrance", increase that. On Intel cards, right click on the desktop, go to graphic properties, color correction.
Flyback transformers usually have 2 adjustable rods - 1 is for focus the other is for screen (G2) voltage. try turning Clockwise the Screen adjust with brightness-contrast at max. Till you see white diagonal lines, then go back until the lines disappear - then tune the brightness to your desired level.
SHARPNESS - The function is to adjust sharpness of capturing images.
CONTRAST - The function is to adjust contrast (distinction between light and dark) of capturing images.
SATURATION - The function is to set color depth of capturing images.
GRADATION - In this function, you can select the brightness of an entire image. It is suitable when you want to add a brighter effect to a bright object (Hi Key) and a darker effect to a dark object (Low Key).