Question about Hitachi 51SWX20B 51" Rear Projection Television

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Hitachi 51swx20b I had problems with colors shadowing objects. I am assuming and hoping that I needed to replace stk 392 -110s. I also read that I should upgrade to the 180s. I have the circuit board 90% out but cant seem to get the color guns disconnected from board. Additionally, the two items that say stk 392-110 are screwed to these two big fin looking things. Does that all come out? Also I read somewhere that while I had the board out I might as well replace IK04 and IK05. I see the numbers but not sure what is what. Maybe I should just order and see what they look like whne they get here. Thanks, kevin

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The fin looking things are heatsinks. You'll want to unscrew the chips from them and be sure you have some heatsink compound for the new chips (get it from Radio Shack or a computer store).

I don't have a Hitachi, but I'd guess the other parts you're referring to are resistors. Get yourself a multimeter and measure the resistance of each to ensure they're within tolerance (each one should be marked with a resistance value).

I don't know about the disconnection question. On my Panasonic, the color guns were connected by small connector blocks and easy came off. Be sure to label any connectors you take off to ensure you put them back on the same one. Might want to take digital photos, as I did to help.

Posted on Sep 15, 2008

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