Question about Hitachi 43FWX20B 43" Rear Projection Television

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Red color alignment problem

Overnight this problem appeared. All shapes on the right hand side of the screen have a red shadow to the right and figures on the left hand side of the screen have a red shadow to their left. As the news ticker goes across the bottom of the screen a red copy of all letters appears to curve outwards from the background into the screen and follow the letters, gradually matching up and aligning properly in the middle of the screen, then the red copy letters gradually seem to fall back from the screen and curve back into the depths as if the red were on a circular screen that exists behind the real screen. What repair will this need. I know this is confusing, but the problem does not exist in the middle of the screen, just on the outer 1/3s of the screen. What controls and aligns the red in this thing? Any thoughts and help will be greatly appreciated. Bob W.

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Re: red color alignment problem

1) Whenever a rear projection TV has convergence issues, the
fix involves replacement of both IC's = STK392-110.......sub to
STK394-160E for improved durability...........
2) Soldering only is a temporary "fix" at best
3) Do not allow generic IC's, OEM quality or better = I use
Hitachi brand,made by Sanyo,with no callbacks....
4) Skill level needed = above average,....needs chassis pull...T.

Posted on Nov 16, 2007

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Re: red color alignment problem

All you have to do for you to fix this is solder bad solder connections on convergance board if the problem does not go away the replace the stkyou might have more than one replace them all

Posted on Nov 15, 2007

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Its a Good Possibilty that its the New Color Wheel causing this,if the colors are not complete on the color wheel then that will be why you are seeing shadow on right hand side of screen.
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The tv have a problems known as a convergence problems,it dead.The tv colors lines R,G,B mis alignment,have colors shadows pictures or 3D pictures look alike.The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too.These parts on the tv convergence board,must be replaced to solved the tv picture convergence problems.The shop,will cost u like $300-350 for parts and labors.

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On left half of the screen [ KP51WS510 ], a redish shadow showing

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

Convergence problems are very common on all Projection TV sets including Sony,Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms
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  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV2_bing.gif may have one or more of the following symptoms....
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You can see some more examples and find a fix here

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The screen seems to have two of the same image, green and red.

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I hope this helps,

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Red shadow on right hand side of screen

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Select each color. all you have to do is align it with white by using the directional arrow keys - Simple! For fun, Grab a pair of red and blue 3d glasses and offset the red and the blue channels. Yes, I have too much time on my hands. Good luck :)

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Blurry on one side of screen. Green and purple shadows

Convergence IC's should be replaced before any alignment is
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to large heatsink...............T.

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Color shadows

PVAT!Check for evidence of coolant leak on pcb's, If none found,replace convergence IC's,then align convergence in servicer mode.Check service literature for procedure.

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