Question about Hitachi 53UDX10B 53" Rear Projection Television

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Magic Focus does not fix the blue 57UWX20B Hitachi

The magic focus stops when going thru the blue color. What I do I need to do to fix this?

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  • jimsell May 22, 2008

    I ordered the parts and are awaiting their arrival. Will let you know after I install them.

  • jimsell May 24, 2008

    I bought the IC's from B&D Enterprises. Their KIT-10 came with 2 STK392-150's and 6 resistors. The hardest part about getting the board out was 3 heavy duty wires that had to be pushed down and turned to get them from their connector. Also there were a couple of jumpers between boards that I had not seen before but the friend that did most of the work just lifted them up from the lright side. We found out that we SHOULD replace the 6 resistors and managed to match them up from the websight wa6ati.com-HIT-DP23. We had the right values from B&D and replaced RK50 2.7 ohms, RK54 1.5 ohms, RK58 3.9 ohms, RK62 2.2 ohms, RK 46 1.8 ohms and RK42 3.3 ohms. After cleaning up any residue from removing the old IC's, he put the heat sink compound on the back of the IC and screwed it into the heatsink after lining up all the leads thru the connector. Then he soldered in the IC's.

    We put the board back into the TV, put all the connectors where they belonged and turned on the TV, hit the magic focus button and everything came into place. The TV is now working like it was brand new.

    Now that I have done it once it seemed so easy, but it took us a couple of hours. Also I was quoted $395 + parts to come fix a convergence problem from a Hitachi recommended repair shop. The parts were $ 47.95 + shipping.

    Thank you all for your suggestion to replace the IC's and the web site for pointing out the resistors.

    Jim

  • RFranky Jan 16, 2009

    I have the same problem, my question is how do you get inside, I have no manual or anything. I have a 57uwx20b

  • eddie villarejo Feb 02, 2009

    i have a hitachi 51uwx20b chassis dp23 i thought the stk393-150 upgrade kit. i replace the two stk and all 6 resistor. still have the same problem the red is out i hit the magic focus botton but nothing anyone have any idea what could be wrong.. thanks eddie

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  • Hitachi Master
  • 8,617 Answers

You need to replace the convergence ICs they are STK392-110 you can get replacements at the following link and they send instalation instructions with pictures so you can do the repair yourself. You need to replace both IC they are both STK392-110 they are located on the large heat sink on the far right side of your Tvs' chassis Heres the link for replacement ICs
http://servicemanuals.vstore.ca/

Posted on May 20, 2008

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Blue colors no magic focus stop at blue colors


Check the resistor in front and back of Convergence ICs. STK392-110s. the ICs might need to be replaced also. Look for poor solder connections also.

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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....
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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 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 TvRepairKits.com 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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