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Hitachi rear projection tv model 51uwx20b

After tv hasbeen on for awhile the color fades to black and white

Posted by solt on

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Anonymous

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You have a bad tuner or there is a capacitor bad in the color burst circuit.

Posted on Sep 09, 2007

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Set 51uwx20b, how do i fix magic flash to reset factory settings

Convergence board needs repair, google you model # and see if you can purchase a repair kit.
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I have what I think is a Hitachi 55 inch ultravision rear projection TV that is 12 years old. I think the model is 55UX58B. The color goes out and it becomes black and white. It comes back after a few...

When the tv is it totally black and white and the tv picture are good and clear wright?when the tv colors are fade in and out are clear up and when the tv picture it is in colors it is look good normal picture wright?Tv have no shadows of any kinds of colors when picture are good in colors wright?Yes,take ur hand make fist or take a wooden hamer bangs all around the tv bazel frame if the tv colors come back or tv stay in colors it is have good picture in colors.Tv it is still good just have components parts are cold soldering or CRT colors guns R,G,B just require resoldering works only.
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My TV is the Hitachi model 51UWX20B and tried using magic focus to line up red color. Picture looks like 3D with red off center. When using magic focus it gets to the red phase and it shows the number 5...

You need to replace the STK ICs which are Convergence ICs STK392-110 use 120s or 150s
also check the small ohm resistors around ICs . They are Big Black ICs and will have part number on them ,should be located on the Right hand side of Chassis .
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Screen prob with Hitachi 51UWX20B red square

Maybe the best way to adjust the screen is with the manual magic focus..instead of letting the tv do the auto change it to manual and see if you can adjust the convergence yourself. I have this same model and once in the manual adjustment you want to make sure you see all white lines....if you seen any blue or red that is the color that needs to be moved towards the white line closest.

Once you think you have it lined up nicely hit "exit" on your remote and option 1....

Hope this helps you.
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No color only black and white picture

one of your color tube has gone out on you.
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Color fades

HELLO. it sound's like you have a cold solder problem.!!! what that mean's is that when the set get hot .!!! it lose's it's contack.!!! you might try going over the chassis .!!! soldering the conteck's.!!! with a low watt. solder gun.!!! not over 40 watt's.!!! and use 40/60 rosin core solder.!!! hope this help's you .!!! "GOOD LUCK"
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Hitachi 57SWX20B 57 in. Rear

convergance amp ic going?
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
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