Question about Hitachi 43FWX20B 43" Rear Projection Television

2 Answers

Red will not line up

The red lines on the grid will not line up. They are curved, the ones on the top curve up and the ones on the bottom curve down. We have replace the stk's. What could be the problem?

red lines across screen

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  • dholik Apr 26, 2008

    I have absolutely the same problem


  • billings4 Jun 11, 2008

    I have the same exact problem but the lines on my tv are blue....

  • JohnnyB0y Jun 19, 2008

    I have what I htink is the same problem - about mid set with back cover removed, can you please tell me if you have a small RED LED that is illuminated beside the flyback regulator? The flyback regulator is stuck to one of the oddly shaped heat sinks about middle of the set near the back, if you can read the writing on yours it'd have STR F6628 SK2406 on it. I'm thinking that the little red LED beside mine, when all other LED's in there are green, must be telling me something.

    I hope it's JUST the STRF6628 - I can find those and that would be an easy replacement also....

    I have already replaced my STK392-110's with STK392-150's and all resistors are in spec....nothing burned at all....still the annoying red bleeding on the odd picture...

  • lacsho Jun 20, 2008

    I have the exact same problem. The red will not line up.


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EXACTLY it Big Irish!! Different levels + different bleed level. Tube means this set is shot to snot to me unless rejuv works. Can you please post HOW to rejuv a tube? For that matter - what is rejuv? :D


Posted on Jun 21, 2008

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  • 927 Answers

Good Day y'all;

First of all if the lights are on, that's good, the red light,LED's, indicates that there is power to the power regulator IC. The green lights, LED's, indicate that the DC voltages are present for those particular circuits. ALL GOOD! If off bad!
If after replacing the IC's with the 150's and still have color shift and all resistors are within 2% tolerance and adjustments were made properly. The digital convergence board may be defective.
If the picture is bleeding that normally is a gassy CRT, picture tube, and the bleeding changes with the brightness levels. You may try to rejuv but that may short life the tube.
Good Luck, get back if you want more details, Big Irish.

Posted on Jun 21, 2008

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SOURCE: red will not line up

Had the same problem a couple of years ago, it is a defect in the TV. Contact Hitachi it's a convergence issue they will do everything to tell you it's wear but that is not true. I made a big deal about it and finally after contacting many people and doing much research on the problem Hitachi agreed to paid for the part which costs $360.00 Cdn. However, they did not pay labour (only $65.00). Hope this helps.

Posted on Apr 16, 2008

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Related Questions:

1 Answer

How to fix the color alinements

You need to replace the two STK-392-560 CHIPS THIS SET USES AND DO NOT RUN THE SET WITH CONVERGENCE BOWED or soon you will have other parts bad.

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1 Answer

Red color convergence issue; Red lines are curved

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail

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1 Answer

The picture looks 3D

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 projection 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.



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


You can see some more examples and find a fix using this link on Fixya

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1 Answer

Letters and numbers are 3d and curved picture


red, green, and blue lines curve across the top of tv is cause by defective convergence STK IC or you have open resistor at convergence section. if you have defective RGB Color vertical ramp probably you have defective STK IC..


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1 Answer

Red and blue streaks across the screen top and bottom

The Convergence Amp IC's are bad. You should call a good TV Tech for this repair.

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1 Answer

Curved red lines on the screen and the picture is distorted

This is a convergence problem that can be either poor solder connections on the convergence ICs or defective ICs. If you can solder you can fix this yourself. Update this if you wish to attempt the repair and I'll supply additional details and instructions.


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Mitsubishi VS-60111 picture distorted

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1 Answer

Screen is curved inward on all 4 sides and there is a red, and a blue line that is curved at the top of the screen

This is a convergence problem.. possible deflection problem... you might need a tech to look at it...

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1 Answer

3 curved lines top & bottom/blurred picture

This indicates a convergence problem..convergence power supply probally.. however ive seen 2 other cuicits cause this ..

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