Question about Hitachi 43F300 43" Rear Projection Television

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Blue shadow There is a constant blue shadow and yellow bowing from the top of screen. Tried magic focus but had trouble understanding how to work it. Can you help?

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Re: blue shadow

Needs convergence circuit repair = replace convergence IC's,
then activate Magic Focus...............need step by step?......T.

Posted on Nov 30, 2007

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I have small blue dots and a yellow shadow in the middle of my screen

The model indicated uses what is called a Optical Light Engine, it is a very expensive part and likely is your problem---not much else will cause this trouble.

Let me know if you have questions.

Dec 02, 2011 | Sony Grand WEGA KF42WE610 42" Rear...

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The top of the screen is yellow color then drops down in a swoop and more yellow and blue. otherwise picture is good, pushed the magic focus but it did no good. thanks for any help

The magic focus button don't work.The tv have a problems known as a convergence problems,it dead.The tv colors lines R,G,B mis alignment,have colors shadows or 3D pictures.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts,must be replaced on the tv convergence board to solved the tv convergence picture problems.The shop,will cost u $300-350 for parts and labors.

Oct 15, 2010 | Hitachi 65TWX20B 65" Rear Projection...

1 Answer

Double Vision & Bowed Screen

Chances are that the convergence amps are bad.
If those are mounted on a separate board, replacing the board would be the easiest thing to do. Running the magic focus or touching up the convergence in the customer menu may be required.

May 04, 2009 | Samsung HCN653W 65" Rear Projection...

1 Answer

Have a 53" Hitachi HDTV that bows at the top and the bottom. I was told one of the transitors or transformes blew. I also do not have the regular magic focus just the static focus now. I tried to alli

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.



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 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 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 03, 2009 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer


This is a problem with the convergence circuit. If you can solder, try resoldering the pins on the convergence ICs. If that fails to resolve the problem, replace the ICs. These ICs are large and black, attached to a heat sink and are marked STKxxx.

Keep us posted on your progress.


Jun 19, 2008 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

The Model# is 53UWX10ba - Colors off in upper left part of screen

The problem is with the convergence circuit. If you can solder, try resoldering the pins on the convrgence ICs. If that fails to resolve the problem, replace the ICs. These ICs will be large and black, attached to a heatsink and be marked STKxxx.

Update this with your progress.


Jun 19, 2008 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

Hitachi53SDX89B color problem

Blue convergence IC bad...have both IC's changed..insist on
STK394-160E upgrade part # CZ 01341 Hitachi brand.....Original part is STK392-110......Also, check B+ feed resistors next to
convergence amp IC's for burn / damage...after rebuild, press magic focus.......................T.

Dec 21, 2007 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Hit 53UWX10BA

convergance ic bad

Dec 14, 2007 | Hitachi 57SWX20B 57" Rear Projection...

2 Answers

Hitachi Ultravison Projection TV 54"

It's a hardware malfunction. It can't finish the magic focus cuz one of the IC is burned. Need to be replaced and to check the resistors.

Dec 08, 2007 | Projection Televisions

1 Answer

Blue/Yellow out of focus on Hitachi 43UWX10B

You will need the convergence circuit repaired......IC's replaced,
B+ resistors checked and then magic focus activated......T.

Sep 17, 2007 | Philips 60P8342 60" Rear Projection...

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