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Model 34pw8520 picture got fuzzy, then fuzzy, clear, fuzzy clear, then went blank (black). Picture tube? how much to repair?

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  • kmarier Apr 09, 2008

    I have the same problem! Where would I find the Chassis number? I haven't a clue anything about TV repair, but I would like to know the solution so I don't get a run around and charged for something more then I should. I'm in a financial bind and can't afford to be taken for a ride with this TV. As it is I will also need to find a repair person who does house calls in my area, as this TV is too heavy for me to lift and it won't even fit in my car.

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Sounds more like the flyback. What is the chassis number of your set. The flyback if thats what it is would cost under 50 if you replace it yourself maybe 150 if a shop does it. But post the chassis number as the chassis number would make it easier to try to figure out if its the flyback or not.

Posted on Mar 24, 2008

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The model indicated has 3 picture tubes (right model?) and will blank or turn the tubes off for several reasons--almost all are protection.

In this kind of set if vertical loss of sweep (in old sets you would see just a white line left to right) it will not permit the tubes to be on as it would burn a line instantly in all three tubes screens.

If this model not likely to be a do it yourself repair.

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1 Answer

Picture started getting fuzzy then it went out


yes,remove the back of the tv,on the power board you will see the problem.replace those capacitors on the power board.this will allow the set to work.the black bars may still be there.this is an indication of a bad panel.

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1 Answer

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1 Answer

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1 Answer

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This is the classic symptom of a CRT (picture tube)that is starting do get weak. The picture takes longer and longer to come on, it appears greenish and blurry, and it blinks on and off in different scenes, and when it is off the timer LED blinks 5 times. Sony has a circuit called "IK Blanking" which monitors and adjusts the colors in the picture tube, and shuts the picture off when the tube is getting too weak. The good news is that the Sony tubes always respond beautifully to a CRT rejuvination (recharge), and the picture returns to perfect. Since the set is 36 inches and VERY heavy, it should be serviced in-house and an appropriate charge for a service call for your set should be around $150.

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