Question about Hitachi 50GX30B 50". Rear Projection Television

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Hitachi 50" - 50GX30B

Ghosting on laft side, tried Array alignment and can adjust all 9 '+' signs except the middle left will not move far enough. The red '+' sign will not shift far enough to align with the others. Only Blue and Red can be adjusted, cannot move the Green or White '+' signs. The top row also seemed to be scewed and the 'box' around the '+' signs is actually leaning to the right so the adjustments are close but not exact due to the skew. Any ideas to fix is appreciated.

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  • lenny61 Mar 10, 2008

    Top half of screen is double image bottom half of tv is ok

  • Anonymous Dec 03, 2008

    uable to align the blue in the center and in upper left corner

  • johnm15 Dec 06, 2008

    the top middle and top right are out of alignment and sideways in the blue colour. the bottom left has the same problem in blue also. # 2,3,& 7 in red and blue will not fix

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One of your convergence IC's has burned out and needs to be replaced. A good rule here is to go ahead and replace both STK392-110 IC's with the new improved STK392-150's. If you have never replaced convergence IC's and realigned convergence circuits, allow a qualified tech to handle it for you.

Posted on Aug 14, 2007

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You will need to replace the convergence IC inside the TV set.

Posted on Aug 13, 2007

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1 Answer

How do you get it out of 3d what do I adjust, its not a 3d tv


This is an color projector alignment issue. Many projection TVs have a menu item in the video or picture setup that will produce a grid overlay on a black screen of Red, Green and Blue. You use the <, >, up & down buttons on the remote or the TV to move each color (one at a time) directly on top of each other and maintain straight up and down / left and right lines. Once you do this, the picture will be in focus and there will be no more colored "3D-like" ghosting. If you are unable to move the colors far enough, there may be an issue with certain integrated circuits inside the TV that can be challenging to remove and replace. More make and model number for your TV would be required however.

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1 Answer

Colors do not line up on my tv ( left side of sreen looks like 3D) digital array "+" are only white on right side.


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 photos of convergence problems.

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Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

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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1 Answer

Picture is distorted from center on my 65


You do have a failure in the convergence circuit of your set. If you are good at soldering you can replace the IC's yourself. They are on the large circuit board on the left side of the set looking from the back, and attached to a large aluminum heat sink. If you don't feel comfortable doing that, I reccomend removing the board and sending it to PTS corp in Indiana. They are pretty reasonable repairing boards, and a lot less than buying a new one.

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You need to change convergence amplifiers. Should be no problem for a professional

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1 Answer

Alignment will not work corectly, still have blue and yellow show


Make sure the Size and Linearity adjustments are not cranked too high. This can affect the ability to move side to side. Center green first and then red and blue. Some pattern generators can produce a horiz shift. Also, check for a horiz start position adjustment. If blue is way off from Red and Gren then you have a bad amp.

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all you gotta do is use the manual convergence if only the red is messed up

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Have someone replace the convergence amplifiers

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Red convergence will not adjust.


Replace STK393-570 convergence amp IC = common repair
for qualified Mits tech............................T.

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Convergence problem????


Yes Its the stk Packs,They are usally 18

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