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Re: Hatachi TV. color saggging. Blue and yellow sagging...
I would say that you are having convergance problems need to know the model number of the set which is on the back of the tv then might be able to help better. Is there a bow in the colors. Like the red or blue.
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Go to tv menu go to screen setting turn screen contrast to the max and screen brightness half midway point like 55.Tv real old like around ten years?Watches alots daily like 6 or 7 hrs a day?The tv CRT-(tv tube) might be to old,the radiation colors guns R,G,B insisde might not work as well as before.Have a reset setting in the colors setting?Go down to that press that,to restting for the factory colors setting.Or tries add more blue,a bit less green and red,see how that turn out?
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.
Sounds like the red picture tube could be shorting internally which would cause the "all red" condition. In which case you'd have to replace the red tube. Are there horizontal (slightly slanted) lines through the picture as well when this is happening and a very very bright screen? If so it's most likely the tube.
The vertical height driver that controls the height of your picture has weakened and needs to be adjusted. If you are somewhat handy you can do this yourself. It requires that you gain access to back of the set & remove the cover. Once removed, locate the vertical height & centering adjustments. Sometimes they are located on the main board & other times are located on the color gun driver circuit board that is plugged into the end of the picture tube.
Respond to this post if you need additional assistance. Good luck!
This looks like Pincushion problem. nothing you can do. Only a Trained technecian can do this adjustment to reproduce a perfectly aligned image. It requires a pattern Generator and other tools. call the company tech.
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.