Question about Hitachi 50GX20B 50" Rear Projection Television

2 Answers

Convergance Problem?? My TV is only 7 years old, bought new. Audio and Video comes through good, except the video has distorted colors. Doesn't distort the image just the colors. I get purple, green colors all over. The digital array is all wack. Can not line up the colors. Any suggestions?? I heard the "convergance" chip needs replaced.. But how do i know on the tv board inside which is the right chip. I have opened it up and there is a city of chips/heat sychs, etc..HELP?/thanks.Bryan

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  • bryan noname Apr 27, 2007

    Thanks for the reply, I got a service manual on my tv off the internet. I have located the convergance chip. Unfortunately, i live on a tiny island in Hawaii and we dont have any kind of electronics repair shop nor anyone on island with that trade. My only option is to put on a boat to a neighbor island and then ship back. Might as well look at buying new tv. But i thought i would atleast make a small investment to try and saving my tv. Now that i have the service manual, is it safe to say that my tv is indeed having a convergance problem?? Does the pink/purple/green colors spashed all over my screen symptoms of a bad convergence chip? If so, i was going to purchase and do the saudering myself. I am a computer techy guy by trade and think i can give it a shot. What you think??? Thanks, Bryan

  • Anonymous Apr 19, 2008

    I moved my Hitachi projection color tv to dust (my book says 46GX01B 50GX20B) and when I turned it on later that day I had a disorded screen at the top left of the screen and two thin lines of red and green going across. I look at my manual and under digital array it says the tube tubes can drift out of alignment due to normal bumps and vibrations or moving the tv and if I notice color rings or halos around objects, which I do I should converge (align) the colors ? What. So I tried to align by pressing the digital array button in the front and aligning my colors and I have 3 crosses that are way off line and will not move back. What can I do to fix this, to get them all align properly again.



    Thank

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Do not adjust any knobs as instucted in the previous thread if you TV have a convergence problem. Doing so will only make things worse. The blog does however show you how to fix other common problems with these sets.

Here are some of the most common symptoms and example photos of a convergence problem

  • 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.
Convergance Problem?? - 701cb04.jpg
77ea520.jpg
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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. Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Posted on Mar 15, 2009

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Hi Bryan I you are not a tech and you dont have a schematic then it is useless for you to work on the tv call a tech to repair your tv.good luck.

Posted on Apr 26, 2007

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MANUAL CONVERGANCE R56W28 ZENIETH


You have to use the remote - goto your convergence menu. If you can't adjust it - its broke - and needs to be fixed...

These sets have several common problems which are listed below.

Problem #1) Convergence

Yours may have one or more of the following symptoms
  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted or warped
  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....
  • Dull looking picture
  • White looking picture
  • Halos around objects
  • Red/Orange looking picture

You can see some more examples and find the fix here...

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

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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

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This is a common problem. Its called a convergence failure.

Problem #1) Convergence

Symptoms:

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Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
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  • 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

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

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This is a common problem. Its called a convergence failure.

Problem #1) Convergence

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

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Your chips are most likely bad or you bridged the soldering.

For all others with similar convergence problems

This is a common problem.

Symptoms:


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms

  • Dull looking video
  • White looking video
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You can see some examples and find a fix here...

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