There is a blue and yellow wave across the top half of the screen and a sort of ghost below pictures on the screen. I have to drive this 43" TV to another town for repair and was wondering if you could help me either solve this problem or suggest what the approximate cost would be to repair. The TV is approx 4 years old.
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Re: Blue Yellow Wave
I believe what you have is a convergence problem and it is usually caused by two Integrated Circuits going bad which also opens up one or two resistors associated with them. Replacing the Convergence Ic'S - (Ik04 & Ik05) and Resistor Rk62 a 1.8 Ohm .5w. Metal Film type should take care of the problem. As far as costs involved, I would guess about $350-$425 to get repaired. With it only being about 4 years old, it should have that many more years left of good use for you.
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Convergence adjustment procedure to projection televisions are given in detail.
The color image is comprised of three colors, Red, Green, and Blue. All the other colors are mixtures of those colors. The yellow picture indicates that your set is lacking sufficient blue drive.
First of all check to make sure that the tint control is not misadjusted. The next thing is dependent upon the age of your television. If it's an older set that yellow tint is a sign of an aging picture tube. If it's a newer set, less than 5 years old, have it analyzed by a electronics technician that is familiar with televisions if he is skilled enough he will know right away if it's the picture tube or not.
Are the yellow, red & white cables RCA phono plugs?
Yellow = Video
Red = Right Audio
White = Left Audio (mono)
The red, blue & green cables are for picture only and don't include sound. Have you tried using the red, blue & green for the picture and using the other cable, red & white for just the sound? Don't use the yellow.
The problem with the set is that the blue gun has gone weak, and not emitting at par with red and green guns in your picture tube. Turn of the blue screen and get the grainy display on the screen (detach the cable) and enter into service mode to fine tune until you get a perfect or black and white grain pattern.
The convergence Ics need replaced. In Hitachi, resistors and sometimes a coil needs replaced as well. The convergence/deflection PCB is available, but, the cost of that board is higher than having a servicer come to your home and repair the unit to component level.
If you are not familar with this circuit, then call a servicer. Have them replace both ICs not just one. Make sure they are repairing to component level and not replacing the board.
Hope this helps.
Those lines sound like "retrace lines" and several things can cause them. The most common are shorts inside the picture tube and shorted semiconductors in the video driver circuits. They can also be seen if the blue screen voltage is too high or if someone has tampered with the screen voltage control.