Question about Mitsubishi VS-50703 50" Rear Projection Television

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Green "halo" around the bright white images

Greetings. I have a Mitsubishi VS-50703 and I am starting to see a green "halo" to the side of the bright white images on the screen. I have reset the factory convergence but it is still there. No other issues with start up, blue or black screens ... just the "halo" effect. If we know the problem is it worth fixing? THANK YOU!!!!!

- Jeff

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Anonymous

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I have a Samsung HCM5535W rear projection TV that had pretty much the exact same problem-- a green halo around bright white images. I researched it on the net, and determined the most likely problem was with the convergence STK-ICs, or the convergence board. I bought a replacement board with the STK ICs and installed it, but no luck, the problem persisted. I decided to mess with the manual focus adjustment on the green crt (i was seeing a green halo), and that fixed it. As it turns out, no replacement parts were necessary to fix the problem in the first place. Hope this helps somebody out there.

Posted on Feb 07, 2008

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1 Answer

My mitsubishi vs 6047 has been in unheated storage for about 4 years. now picture is very blury. when words are on screen large letters are legible with small white horizontal lines dancing side to side....


Does the picture look like this?

dcramer531_118.jpg
If so I believe your CRT liquid coolant has gone bad and needs replaced.
How to diagnose bad CRT Coolant:

Note: This problem will only affect the GREEN and BLUE picture tubes. The RED CRT is never affected, because the wavelength of the red light does not promote this algae growth
General Symptoms: Washed out, blurry picture, red portions mostly OK, GREEN images have halos, BLUE portions of images may have halos or be missing entirely.Turn the color level control all of the way down and remove the screen and/or the cabinet that contains the mirror. (different for different models) Do not turn the set off or the color level control will reset to preset levels. Look directly into the picture tube lens while the set is on. First look at the RED CRT. Observe the scan lines in the picture. These same lines should also be present in the green and blue picture tubes.
After looking at the RED CRT for comparison, look into the GREEN or BLUE CRTs. If it is contaminated, it will look like there is a layer of film that you have to look thru to see the picture. There may also be swirls and other various contaminates forming. If it is not as clear and sharp as the RED CRT, it is contaminated, and you should change the coolant fluid. IF you wish to tackle this I will supply more information and instructions. This task is medium to hard for non trained people.
Let me know if you wish to get the instructions on changing the fluid.



Jun 09, 2011 | Mitsubishi VS-6047 60" Rear Projection...

1 Answer

My Mitsubishi VS-60621 seems to have a convergence problem


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 05, 2010 | Mitsubishi VS-60621 60" Rear Projection...

1 Answer

Green wavy images on the screen? Convergence is fine but there is a warped green image of everything on the screen.


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Sep 27, 2009 | Toshiba 65H82 65" Rear Projection...

1 Answer

Excessively bright whites...has a haze around any white items. all other colors are fine.


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 white,dull, red/orange, etc. You may even see white halos around images.

Here is a photo of a set that needs the fluid changed.

578ba6c.jpg

TV set after fluid change

65af323.jpg

2c07611.pngSolution


What you will need to do is replace the coolant and clean the crt lens. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos, step by step instructions, etc.

May 12, 2009 | Televison & Video

1 Answer

S.O.S anyone out there


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Sep 03, 2008 | Mitsubishi VS-55705 55" Rear Projection...

1 Answer

Mitsubishi VS-50703 Picture Foggy


Open up the back and look for coolant leaks in the CRT's. If you are curious as to what it is, it's the same type of stuff they use to make antifreeze. If you see something wet, it should feel slippery if you get it on your fingers and rub them together.

May 10, 2008 | Mitsubishi VS-50703 50" Rear Projection...

1 Answer

Mitsubishi VS-50703 blurry after move


A halo effect usually means the coolant in the CRTs need replacing in the effected color usually blue goes first followed by green. red seems to be less prone for some reason.

Jan 14, 2008 | Mitsubishi VS-50703 50" Rear Projection...

6 Answers

Blue Halo, Tried to adjust on Projection TV


The convergence issue you have will not adjust out....repair
of the convergence circuit will be necessary....then adjust...T.

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