My TV has just recently been loosing color sync and I get the rotating color bars. I took a color TV repair course years ago and know that the sync oscillator probably needs to be adjusted to bring the color back in sync. Do you agree? If I am right where is the adjustment. Is it an adjustment that can be made through the menus or is it a physical adjustment inside. In either case where?
If I am wrong then what do I need to do? By the way I have noticed that the color sync in the picture in picture is fine, just the larger screen is messed up.
Thanks in advance.
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Refurbished VIZIO E701i-A3 70" 1080p 120Hz Class Razor LED HDTV $ 899.00 at walmart ,because it looks like the power supply capacitors are going out red LEDs need more current to light up..and if you do not know how to repair electronics then you might consider another option .. :(
Hi,Yes your problem sounds like the DMD board.This is how it works: http://electronics.howstuffworks.com/dlp1.htm Basically the light of the lamp goes through a tunnel that carries a color wheel(rotating disc with a gamma of colors that creates the colors on your tv)then the light of the lamp goes through the DMD board which is a chip composed of around 2 million pixels that creates the images and colors.When it starts to fail it will create black bars,pixelation,color distortion or white dots on screens.Ths if your tv is a dlp if its a Lcd it will be an issue with your light engine: Here's how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo Basically there's 3 LCD chips that create the colors and image by blending together.When these chips start to melt you will get those blue spots, pixilation even vertical lines.You will need to replace the light engine. Have a blessed one!
FIRST YOU NEED TO LOOK INSIDE THE UNIT FROM BEHIND WITH THE COVER OFF AND SEE IF THE TUBES ARE LIT. AT THE BOTTOM OF THE TUBES BY THE CIRCUIT BOARDS, SEE IF ALL 3 ARE GLOWING ORANGE,(FILLAMENTS). IF THEY ARE ALL THE SAME THEN LOOK INTO THE LENSES AT TOP AND SEE IF THERE IS ANY LIGHT INSIDE. THESE SETS ARE COMMON TO HAVE BAD SOLDER CONNECTIONS ON THERE CRT BOARDS. EITHER LOST THE FILLAMENT CONNECTION OR LOST THE VIDEO DRIVE SIGNAL. LET ME KNOW, WE CAN GO FROM THERE. CAN YOU USE A SOLDERING IRON?
Symptoms shows TV has problem of faliure of convergence out ICs. (2 ICs in TV) and need to be replaced.Let me know do you want to repair it at your own? ... ... if yes, it is necessary to have experience of TV repair and basic electronics knowledge.
Yep, your problem is a relatively easy one to repair if you know how to solder. You better repair it before it blows the fuse though. There are two capacitors in the main power supply that are coming loose and need to be re soldered. There is a Toshiba service bulletin about it. They are marked C809 and C810 on the main power supply board. Good Luck