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Fuzzy Rear Screen Projection TV

I'm hoping you can point me in the right direction as I live in a semi-remote part of Alaska with no technicians. I'm not totally unfamiliar with electronics (I'm an electrical engineer by trade), but I've never repaired a television set. I have a Zenith 52" rear projection TV (8-10 years old but the circuit board was replaced two years ago). Recently the image started to get fuzzy. It began by slowly fading fazzy and clear every few minutes but now it's permanently fuzzy. I cleaned the lamps and the mirror, and while it helped, it didn't solve the problem. The color is fine, so it doesn't appear to be a convergence problem. Any recommendations?

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  • Televison & ... Master
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Probably the EHT unit is failing or the Focus Control is out of adjustment or if it gets worse as the brightness increases, may need a new TV.

Posted on Apr 02, 2017

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Convergence problem on rear projection Panasonic PT53WX42?

Chris Palmer gives detailed instruction on how to replace the convergence IC's. Go to his blog at: http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Posted on Sep 26, 2007

  • 1030 Answers

SOURCE: Color Convergence

you will have to go into what is known as service mode... have to have a code to get into it

Posted on Jan 18, 2008

Slinteriors
  • 8617 Answers

SOURCE: model 34pw8520 picture got fuzzy,

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

Slinteriors
  • 8617 Answers

SOURCE: 1999 zenith 52 inch rear projection screen t.v.

IS the screen white retrace lines ? Have you looked into the CRT lenses while they are on with a signal applied through the input to see if an image is displayed in the lens lens of the crt? Let me know what the answer is to these two questions and we will go to the next level.

Posted on Apr 10, 2008

ginko
  • 19396 Answers

SOURCE: Regarding a Zenith Rear Projection

Looks like the crt board is having some problem

Posted on Jul 08, 2008

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TV was working fine, moved to new home and the problem began. Picture rolls to the right, picture is fuzzy and will clear up somewhat at times. The picture will stop rolling at times also,but may be a half...


TV was working fine, moved to new home and the problem began. Picture rolls to the right, picture is fuzzy and will clear up somewhat at times. The picture will stop rolling at times also,but may be a half and half screen. Sound is fine, can you help me with this problem please.

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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.
 
Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem. 

Here are some of the most common symptoms.
  • Screen looks 3D
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed in but stationary.
Solution:

You need to replace the convergence chips and convergence resistors. Check the site http://www.TvRepairKits.com . They have put together a kit for your exact model. The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc. Everything you need to fix it yourself. 

Hope this helps,

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Tell me what it does when you try turning it on...accordianman

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Convergence


Color tubes are OK. Do not adjust. The issue at hand is called
convergence alignment.The repair involves-------
1)Pull chassis
2)Replace convergence IC's
3)Recheck alignment
work should be done by a skilled technician........T.

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