Question about Hitachi 50UX52B/53K 50" Rear Projection Television

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We have blue ghosts with brilliant colors

We have a 50-52 inch hitachi 50uk58k. we have blue ghosts and the rest of th picture is very briallant in colors. the yellows are very bright. the skin color is very yellow and we can not change the color. is there a solution. we love our tv and really like it better than any of the tv today . we don't want to give it up

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  • umilliron Jan 25, 2009

    i have 50ux58K projection hitachi tv. it is 14 years old and this # doesn't register in your line up. i also have blue ghosts and the faces of people are brillant yellows. there is a yellow box around the outside with a blue box next to it and then the blue shadows of a person. can you hel

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This sounds like the most common thing that fails on projection TV's, regardless of the brand. The convergence circuit has two STK392-110 IC chips mounted on heat sinks to drive the convergence yokes. They typically last anywhere from 5-10 years, then they fail. A more robust part is now available (STK392-150) as a direct drop-in replacement. My shop has installed these IC's in hundreds of projection sets and had fewer than 1% of them come back with repeat failures. Also check the following low-ohm feedback resistors to make sure they did not go out of tolerance:

  • RK42: 2.7
  • RK46: 2.2
  • RK58: 3.9
  • RK52: 3.3
  • RK50: 3.3
  • RK54: 2.2

Posted on Aug 18, 2009

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