Question about Symphonic ST420FF 20" TV

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Tv color messed up

Have an 4 or 5 year old tv. and the color is messed up, on a blue screen for video for instance the whole left side of the screen is green the center is fine and the right side is red, tv has been degaussed and no luck i think its an adjustment issue.

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  • jreycrx Jun 05, 2008

    any idea of how much it would cost?

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2 Answers

***.

Posted on Jun 26, 2008

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  • 206 Answers

There is the chance that the yoke has sliped and a purity adjustment is in order, since you would be dealing with voltages that could kill you if you don't know haw to do this the safest bet would be to take it to the shop

Posted on Jun 03, 2008

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Good luck hope this could help you..
your rate is important to me..tnx...

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Good day.

The problem with your unit is that when your tube was replaced, it was not degaussed or demagnitized. The purpose of such is to distribute the color evenly unto the entire television matrix.
You can try to demagnetized it by rotating a magnet around the surface( but not so near) of the picture tube while it is operating.

Also, please check for the degaussing coil around the rear portion of the tube was returned and also check for loose contacts.


chris

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1 Answer

Color messed up


Most likely your visitor turned one of the controls located on the back of the TV. There are only two controls they are the right side of the set in the back. The top one is the focus and the bottom one is the SCREEN control. You can carefully rotate clockwise the screen control until the brightness is back to normal. If you go to high with it you will see faint diagonal lines going accross the picture.

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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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Good day.
The problem includes malfunctioning of you units deflection yoke, color circuit and failures in the chroma system.
Have it check by a repairman.


chris

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