Question about RCA R52WH73 Projection Television

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RCA R52WH74 Convergence Problem

Hi:

I'm having an issue with color separation on my RCA R52WH74 TV (colors separate into red, blue, green with a bowed 3D effect).

Searching for the problem on the net, I determined that the FL231 fuse was blown - so I replaced it. I also checked the DL231 diode which seemed ok.

Replacing the fuse worked and fixed the problem for about 4 days, after which the fuse blew again.

Is there anything else I should check on that board? Obviously, there is an overcurrent happening somewhere, and I hesitate to just keep replacing fuses.

Also, if you have a link to the service manual for this TV, that would be helpful.

Thanks for any advice,

Don

Posted by on

  • BADBOY81144 Jan 29, 2009

    I HAVE AN RCA MODEL R52WH74 HDTV. WHEN I TURN IT ON IT WORKS FINE THEN AFTER A WHILE WILL SHUT OFF THEN IT TURNS ON FOR A FEW SECONDS WITH THREE COLOR LINES THEN SHUTS OFF THEN TURNS ON THEN SHUTS OFF AGAIN. IT ALSO KEEPS BLOWING THE CONVERGENCE FUSE . WHATS WRONG WITH IT

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  • Master
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Yes i replace that fluse fl231 all the time at the shop. at least two aweek. and the first few i replaced did the same thing. I would send it back to customer and i would get a call that the set had malfuctioned again and convergence gone. It was determined the reason this fuse blows is bad conections on the flyback transformer. The flyback is the big black component with the red wire coming out of the top. if you examine the connections on this component there will more than likely be a ring in the solder. this is caused by the manufacturing process known as LEAD-free solder. THis cause oscillations in that cuicit. like turning it of and on really fast. this is a very small fuse and cant stand up to this. so when you replace this fuse just simply RESolder these connections apply a little amount of solder to these connection. i am confident this will fix your problem.

Posted on Sep 20, 2008

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  • RCA Master
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The problem is related to the Convergence power supply board, which is shorting out and blowing fuse FL231. You will need a new Convergence power supply board to repair the Issue with the ITC222 chassis. You can get a replacement board at the following link.
http://servicemanuals.vstore.ca/

Posted on Sep 10, 2008

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Hello I have a mitsubishi vs-45603 with what appears to be a convergence problem.


You may have bought bad chips or your soldering...
This is a common problem on many brands of Projection Tv sets. Its usually a convergence issue. You can get more details and a solution here on fixya using this link http://www.fixya.com/support/r11932741-convergence_repair_dull_video_repair

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Screen lookes like colores separating


Here's all I find regarding bad convergence from the techrepairCD:
RCA ~ITC222 D52W20~Convergence bad~~~ITC222~Replace leaky DL032 on
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RCA~D52W20Y ATC221~Convergence goes out/bowed after on for a few
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RCA~D52W20BYX1 ITC222~no convergence correction~~~ITC222~LP650
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Re: Toshiba 65 in Cinema Series - 12 years old. Color Separation. Green bow at top center of screen, red and blue double images tilting upwards toward sides. Sometimes clears unassisted after set has...


projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


7859b01.jpg

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Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

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TV set after fluid change

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69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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Images: three colors appears separates in the screen: red, green, blue


do they look like these:
· http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
· http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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