Question about Hitachi 55FX20B 55" Rear Projection Television

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Hitachi 55FX20B 55 in. Rear Projection - no picture or sound

Hi,
I own the Hitachi 55FX20B Rear Projection TV, manufactured Sept. 1996. The picture became fuzzy (like colors separating) and the TV turned off by itself. When I pushed the power button to turn it back on, the red
power light blinked and there was no sound and no picture.
I pushed the power button to turn off the blinking light, unplugged the TV and the cable television cable from the set and waited 3 hours before turning it back on, but still did not receive sound or picture.
A repair person on craigslist said the issue has to do with the convergence circuit and power supply, both have to be repaired followed by an alignment. The cost ranges from $200-300. Does this sound like the case? Is it easy to fix if I did it myself (I'm not very mechanical and don't want to get electrocuted- I heard that even unplugged, the T.V. holds a charge). Thank you for your time.
-Douglas (fit68@juno.com)

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TV always has high voltage shock risk while repair. As you said you are not familiar with TV repair so better to handle repair person this issue.

Posted on Oct 01, 2008

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My hitachi 55fx20b has a shift in color. red, blue and green does not project at the same spot. what can be the problem?


It sounds like what is called a "convergence" problem; 3d looking with colors out of place etc.

Most of these sets use two of the STK-392-150 chips for this (see photo) and you can look inside to see which are in your set.

A pair of the chips on EBAY sells for about 13 dollars and the only other parts usually involved may be a resistor damaged when the chips failed----this is the exception rather than the norm.

If you or someone you know can solder, etc I can tell you the best way to get at the parts and everything you will need to do the repair; for me----I have repaired over 1,000 sets with this kind of problem.

I am attaching photo of typical convergence problem and what one of the STK chips looks like (chip is 2 1/2 wide/ 1 1/2 tall with 18 pins).

If the photos and this information told you something you did not know rate this solution as very helpful as I do this here for free.

SD TECH





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