Question about Hitachi 50FX30B 50" Rear Projection Television

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Color bowing at top and bottom of screen

Mutly the blue and yellow also get some kind of inerference geiins squiggling lines

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  • 5,138 Answers

STKs 392-110s replace both of them if 110s use 180s,they are the betteer ics.

Posted on Dec 12, 2008

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Screen is bowed on top and bottom. What could be our problem? Picture, letters & words blurry.


go to hatch screen adjust all colrs to make white color boxes , also adjusts linear lines

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Bowed blue and red colors on t.v. akai 42in hdtv 1080i


You probably have a convergence issue. Since you did not include your make/model there's not a lot that we can do to help you. Try searching your model number with the word convergence in the search criteria.

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My Sony Projection TV middle of the screen curves down on top and curves up on bottom. Picture looks dubble like 3D, screen looks like concaved. Left side of the screen color is light green and blue, right...


This is a very common failure on Projection sets. Its called a convergence problem.
You may have one or more of the following symptoms.
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.
No Audio / No Video - Makes Chirping Sounds
You can see some examples and find a fix here...

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

Sep 26, 2009 | Sony KP-51WS510 51" Rear Projection...

1 Answer

Color seems off possible bowing of the image at top and bottom


that's right my friend, you have a convergence problem, you need to replace the stk's and it is possible that you have some burned resistors. if can't do it yourself  you are looking $250.00 repair 
good luck

Jun 07, 2009 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

Screen slooping and colors dont line up


Ur convergence it dead.U know how to solder right?Buy the convergence kit,use what in the kit.Tries these websites.Tv Repair World.com,Ebay.com.

Apr 04, 2009 | RCA R61WH76 61" HDTV

1 Answer

Bows on sides


Try degausing the set with the system software. if this doesnt fix it you will have to degause the set with a professional tool.

Jan 27, 2009 | Mitsubishi VS-55601 55" Rear Projection...

1 Answer

Yellow ans blue color bowing


STKs you have 2 of them they are convergence ICs ,Big black ics STK392-110s if this is the ics numbers upgrade and use 180s, if they are 020s go to 040s,if they are 560s or 570 use the same

Dec 12, 2008 | Hitachi 50FX30B 50" Rear Projection...

1 Answer

Red bow on top and bottom of 61dx01b


Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projeciton sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
  • 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.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some photos of convergence problems.

42d3683.jpg

7859b01.jpg

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Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

May 21, 2008 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

Blue haze around image, yellow streak


the tv color circuit is off frequency change the color ic take a look on the crystal that gives the 4.8.mhz burst could be that it needs to be replace dont rule out the video IF change the two ICs you mention.good luck.from the look of your tv screen that is my conclusion.good luck.email me at nicodhem@yahoo.com

Apr 04, 2007 | Samsung HC-P4241W 42" Rear Projection...

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