Question about Toshiba TN55X81 55" Rear Projection Television

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Toshiba TN55X Convergence problem.

My Toshiba TV lost suddenly convergence for all the colors. Interesting part is that this happens only when using internal TV tuner, S-video or composite video signal externally. If I use HD1 or HD2 inputs from external devices my convergence is coming back and is working perfectly OK. I have also notice that when switch to HD1 or HD2 Inputs I can hear relay click, so I guess something is switching in convergence circuit when use HD component Inputs…
Does anybody experience similar problem? Any help, direction in troubleshooting this problem would be much appreciated. I have some experience in electronic TV circuits but unfortunately I don’t have schematic for TN55X. Does anybody now where I can get one, I was searching on a web with no luck so far.
Regards

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You brought up an issue that we hadn't considered. Shortly after hooking up our TV to the receiver with a composite video, our convergence which wacko. My hubby replaced the 2 ICs, but now our power button just flashes red, with no picture. Not sure if new ICs are faulty or if it's another issue. He will replace old ICs to see if problem still exists with turning on the tube. And he'll try disconnecting the video signal to see if problem exists.

Ouch.. may have to consider another tv thanks to new technology ??????

Good luck solving your problem.

Posted on Jun 04, 2009

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Common Symptoms include....
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Here are some photos of convergence problems.

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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.

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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 solution

93a1209.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 know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

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