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Re: 46in rca tv
There is a good possibility your tv has a bad picture tube,the fact that is blurry and the age point to that conclusion,you should invest in a new television and prevent the waste of money on this one.
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You either have a bad CRT or a Shorted Red Output IC/Transistor. One other possibility is if
someone turned the Screen Control down if it is accessible from the back of the set.
Hope this helps,
I'm assuming this is a projection set given the size. Sony TV's have circuits to monitor picture tube operation and cut off video when something isn't within limits. It's very likely your set has one or more bad tubes (there are 3, for red, green and blue), troubles on the circuit boards connecting to them, or problems with the set's control circuits. This set should be serviced by a professional if you want to keep it.
you have a shorted green CRT that is affecting the other crts the short is internat to the crt that leaves what is called retrace lines. if the set is more than three years old then replace all three guns.
blurry picture is mainly due to focusing voltage is not proper.
1 check & adjust focus control on flyback.
2 check crt base for loose.
3 wire going to focus control on crt base got disconnected due to foreign materials deposit on it.
4 if tv is old possibility of crt getting weak.
Each projection set has focus controls in back, usually they don't move or go out of focus unless someone moves it, but in your case if you open the back you will see a focus block with 6 knobs 3 are for screen,I would highly recommend that you don't move this. Look for the focus and you will have to set each with the one color. Cover the other two and adjust.
Sounds like theres a leaky capacitor in the screen drive circuit. I have seen this problem also be a gassy crt but was able to clean off the grids of the CRT with a crt/rejuvinator. It happens because of low emmissions in the tube and when white is on thats a mix of all the colors, so the tube works harder. I bet when you whatch a movie and the scene changes suddenly to a white or brite scene the pic looks a little washed out. If this is not the case then I aggree with the Pravin and try it on another TV just to be sure .. This is not a repair for a consumer to do, though however it is only a three year old set you stated, so there should be life left in the tube, so im kinda thinking a capacitor is bad. Seek out a yechnician to check this out for you as a TV is not a place to see it you can fix it or to exoeeriment with. Good Luck