Question about Mitsubishi WS-55807 TV

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Convergence problems WS-55807

At first the blue convergence would not line up and would not adjust properly. After trying to adjust the red and blue, cannot adjust the red convergence at all vertically, horizontal is ok. Is there a fuse associated with this, that might have blown? Where are they located? Looked in the back of tv but can't find them. Please post any suggestions. Thanks!

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  • Sandy Howlett May 12, 2007

    When we first started to adjust convergence, the red convergence would adjust vertically but after it went to the max vert. it just quit adjusting.

  • Mike Jan 31, 2008

    I have the same problem. The red can be adjusted up and down, but the left and right won't move. I just replaced the convergence IC's. I re-touched all solder joints on the ic's. I also checked the connections with a multimeter from the pins to another component on that trace and they all seem good. I started checking other solder joints in the same area on theat board. Is there specific pins I should be looking at? Are there any resitors, caps ot diodes to look at?



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On this model if the fuses that protect the convergence circuit would open up, then the set would not come on. The convergence ICs probably have a cracked solder joint on the foil side of the circuit board.Re-flowing the the solder would help. I will always replace the convergence ICs when doing this job. The labor remains the same and you will have to pay a few extra bucks for the parts. Hope this helps.

Posted on May 13, 2007


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This would mean the two stk-392-570 convergence chips this model uses need to be replaced(I have free start to finish instructions for that).

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Projection TV2_bing.gif 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.

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Common Symptoms include....
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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.

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.

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