Question about GE D52GW12 52" Rear Projection HDTV-Ready Television

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Blooming causes bad focus!

My flyback burned and I replaced it, but now I am having a major problem with blooming! Whenever the picture is bright, it enlarges, and when it becomes dark, it shrinks alot. This is causing it to go way out of focus, and if I focus it when it is bright, it is out of focus when dark and bleeds alot and vice versa. How do i fix this? Is it possible?

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  • 5,568 Answers

This load-related change is caused by the failure of the power supply to keep the service voltage for the high voltage section regulated.
The flyback may not have been the only component that failed; its failure may have damaged components in the power supply itself.

Posted on Jun 19, 2008

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In the model listed here having contrast way too high can cause that--contrast should not exceed 70 percent and brightness should be a bit lower or equal--note as contrast is lowered the white smearing should lessen.

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carensimson,

You have a problem called "blooming" which is caused by a defect in the regulation circuit of the high voltage section. If you are not a technician you probably cannot troubleshoot it succsssfully as this is a hard problem to solve. You probably can change out the entire high voltage board if you are good with tools and concientious. I looked on http://www.encompassparts.com and they list a service manual and quite a few parts, some are no longer available. If they have the board you should be able to change it with my tip at http://www.fixya.com/support/r4916851-diagnosing_repair_tv_high_voltage .

Thanks for using FixYa and for the great rating. Great ratings will help keep the experts here helping everyone.

hardrocko

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the picture sounds like its blooming, you must turn down the screen control on the back of the fly-back transformer, or the transformer has gone defective more likely and needs replacing

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televisions such as this ( CRT Tube ) do loose definition and focus after a time a prime visual sign of this is what we call blooming if you turn the brightness up and down rapidly the picture appears to go larger and smaller this is as the scan coils try to facilitate the change in anode voltage but due to age of CRT finds it it difficult to compensate .. it also accompanies blurring of picture and loss of definition at edges of screen .
you can try a Remote with the correct controls for the set and they will most probably be obtainable cheaply off the net on Amazon or Ebay and indeed from the adresses above this window . but I don't think realy this is going to solve your problem .
Engineers use a device called a tube booster
or Rejuvinator it clears carbon deposits off the electron guns in a tube that is partly responsible for this problem , sometimes it works and the equipment will go on for years sometimes the equipment is too far gone and it does little this may be your best solution other than a tube or TV replacement .. Regards Vortash

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