Question about Hitachi 53UWX10B 53" Rear Projection Television

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Convergence repair problems.

I recently found this forum and installed stk392-150s in place of my 110's. Then after installation, a few resistors were blown so i replaced as needed. Now I am in a predicament. I replaced RK 42 and RK 62 but they continue to blow. I might have the wrong size or something, but according to my notes RK 42 = 3.3ohms and RK62 = 2.2ohms (both 1W). I had the wrong size on the RK62 at first and put the right one in after and it blew as well. The 42 might have been wrong from the beginning but I dont have a 3.3ohm resistor to check that.

Why is the RK62 blowing when I start up the TV? Any ideas?
Oh and when I went to play with the convergence, its even worse. NOTHING will move now, as opposed to after I fixed the ICs I had full range with green, left and right with red, and nothing with blue. Now i have NOTHING. Any help?

Posted by on

  • bodiez Aug 30, 2008

    I would rather keep the 150's in if possible. Do i need a whole new set of resistors with new ratings? Any advice for keeping the 150s? Thanks though Slinteriors :)

  • bodiez Aug 30, 2008

    Thanks again for your help :) Anyway, I did replace 4/6 resistors when i replaced the ICs and still 2 of them blew out. When i removed some of the blown resistors, they definitely looked bigger (larger wattage?) then the ones I put in. I put all 1W resistors in to replace the old ones, and at least 2 of the resistors that I replaced were smaller in size and thickness then the new ones I put in. Could my resistor information be bad or something?



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  • Hitachi Master
  • 8,617 Answers

Alot of people make the mistake of putting two STK392-150 Ics in the Hitachi , and most times it will not work unless you change all the convergence resistors.. If youre going to upgrade hitachi to anything other than the stock ICs, it is recomended by Hitachi to use the STK394-160 ICs but then you have to change the ratings on the resistors. You can get the upgrade kit for your hitachi at the following link.

Posted on Aug 29, 2008

  • Sonny Berry
    Sonny Berry Aug 30, 2008

    no hitachi just recomends replacing all six of the conevergence resistors when replacing the ICs. Use the origional ratings . The only ICs that require different rated resistors are to upgrade to the 394-160 ICs

  • Sonny Berry
    Sonny Berry Aug 30, 2008

    53UWX10B resistors are RK42 3.3 ohm 1watt,

    RK46 1.8 ohm 1watt,

    RK50 2.7 ohm 1watt

    RK54 1.5 ohm 1watt,

    RK58 3.9 ohm 1watt,

    RK62 2.2 ohm 1watt



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This sounds like a convergence problem.

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After some years the grease dries out and one of the chips overheats and fails.

Not a real hard repair to do if you are handy and know how to solder----

Most shops are going to charge about 300 or more for this repair-----considering you can buy all the parts for under 25 dollars if you or someone you know can do it you can save a lot of money.

I can give you general instructions for this repair on this set.

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Here are some of the most common symptoms and example photos of a convergence problem

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2c07611.pngSolution #1

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