Question about Hitachi 53FDX20B 53" Rear Projection Television

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Hitachi 53FDX20B I have a "color wave". I tried the magic focus but it did nothing. My set is 3 years old. Is there a way to fix this problem manually?

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  • 74spider Nov 12, 2007

    on the left side of the screen about 3/4 from the top there appears to be a wave or droop. It fades to a line across the screen.

    The "wave" flashes a little quicker than once per second.

    Everything else appears fine with the picture.

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If you have a color (red, green or blue) that is bowed inward from any side, then one of your convergence IC's has cracked loose or burned out. There is no way to fix that manually - the IC and possibly a resistor must be resoldered or replaced, and that should be handled by someone experienced in repairing and realigning convergence circuits.

Posted on Jul 15, 2007

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Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

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

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
Hitachi 53FDX20B - 701cb04.jpg
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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changeHitachi 53FDX20B - 578ba6c.jpg />578ba6c.jpg
TV sHitachi 53FDX20B - 65af323.jpguid change



2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Posted on May 07, 2009

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TV turns on automatically after being turned off for a few minutes.

Posted on Apr 18, 2009

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1 Answer

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This is a problem with the convergence circuit. If you can solder, you can repair this yourself. First try and resolder the pins on the existing convergence ICs. These are large black ICs attached to a heatsink and should be marked STKxxx. If the resoldering does not resolve the problem, replace the ICs.
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Yes - You will need to either remove the circuit board or lift up the tray. If you are not sure how to do it yourself read the link below.

  • This is a very common failure on Projection TV sets.
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
You can see some example photos and find a solution here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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Replace the two convergence Ics they are STK392-110 if your model is the 53FDX20B you can get replacement Ics with installation instructions at the following link.
http://servicemanuals.vstore.ca/

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lupe0112,

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I have the exact same problem.......you just explained it a hell of a lot better than me. In the magic focus was red broken up, blurred and flashing as well as only 3 bars???
If you solved your problem could you please get back to me.
Thank you
Randy
gardner7768@msn.com

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