Question about Hitachi 50GX49B 50" Rear Projection Television

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I just received a Hitachi 50" projection Tv from a friend. He was the original owner and it appears after 8 years the picture quality went bad. After spending some time with the operating manual it appears the the convergance is the problem. Basically you have overlapping colors at the top and bottom in a arc patteren. trying to align this by the manual is not going to work. The stationary Green color + signs are in a arc pattern at the top and bottom. You can move the the Blue and Red color with the remote but you way out of aligmnent. Any known issues or fixes? What is the service mode about on the Digitial Array button? Model is a 50GX49B. Thanks, Joe.

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  • Hitachi Master
  • 3,459 Answers

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.
I just received a Hitachi 50

f0900cb.jpg
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 directiI just received a Hitachi 50" projection Tv from a - 2c07611.pngnvergence 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.
I just received a Hitachi 50" projection Tv from a - 578ba6c.jpgef="http://www.fixya.com/support/t1631691-red_aura_in_middle_55_phillips#" >Picture of a set that needs the fluid changed.


TV set after fluid change

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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 Apr 24, 2009

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Posted on Jan 02, 2017

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