Question about Hitachi 53UDX10B 53" Rear Projection Television

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Blurred screen Hello My screen just bowed down from the top and up from the bottom. I ran a magic focus whiched stoped half way through and a green 3 poped up. Any guess at what caused this? The picture is also out of focus. Thanks

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Re: Blurred screen

Unit needs convergence ic's replaced.They are stk392-150 which is an upgraded part.

Posted on Mar 06, 2007

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Just the blue on my rca projection tv is blurred. on the auto convergeance it says it cant read the sensor. on manual the cross hairs for the blue are oversized and blurred. i tryed tuning in the focus but...

Have you try adjusting your focus/screen drive controls to Tube R/G/B you have a focus/screen drive control block to adjust each Tube 3 controls ontop 3under them top ones are for Focus bottom is for screen drive.Red/Green/Blue Tubes.You might need to replace convergence IC, what is your Model number printed on back of TV?

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Have you tried the "Magic Focus" Button/Option in the Menu Setup Screen? If you have and it still is there, You Have a Burned out Color Tube. It is Cheaper to Throw it away and Buy a New one.
Good Luck..

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Have a 53" Hitachi HDTV that bows at the top and the bottom. I was told one of the transitors or transformes blew. I also do not have the regular magic focus just the static focus now. I tried to alli

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 projeciton 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.



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


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

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1 Answer

Double focused, red and green, bow in picture top and bottom

You have a convergence problem
If the set has auto focus and will not complete its cycle.
The Auto focus module is bad, (expensive)
If it completes and the problem is still there.
Then check for bad conv. drivers (stk****) or cold solder joint on one or more of the 3 drivers pins.

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Double check your work for errors such as solder bridges or incorrect resistor placement. Look carefully anywhere solder could have dripped or splattered to cause the bowing. If you entered the digital convergence mode to touch it up, you will have to re initialize the magic focus for it to function. Good luck

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This is an indication of convergence issues. There are two ic chips that control this and there is a likely hood of there failure and need to be replaced. there possible other issues with ouput resistors and fuses. At my shop the cost to replace these chips are 200 to 350. not a too difficult repair.

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One of your convergence output IC's has burned out and needs to be replaced.

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