Question about Hitachi 51UWX20B 51" Rear Projection Television

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The red will not align up in our Hitachi model 51UWX20B with magic focus done automatiaclly or manually. When the red first started to go out of line we did magic focus and it worked. then after turning the tv off it went out of line again and will not go back. Once while messing the the pip buttons we got it to align somehow, but after about 20 minutes of watching tv the red moved again. How can we fix this?

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  • 1,208 Answers

You have a bad convergence board. You will have to remove the convergence board. If I remember,this board also has the flyback transformer mounted on the same board. It is quite complicated to pull this board. You will need to use different colored permy markers to remember how to reconnect the cables and connectors. The ICs you will replace are the STK-392-110 and STK-392-150. You will resistors that are low ohms (under 10 ohms) at two watts. They may be 1.5, 1.8, 2.2, 2.2, 2.7,3.3,3.9, and 4.7 ohms. For a full detailed instructions and photos see the website,www.TvRepairKits.com. Be sure to have your model number handy and follow the instructions on this website. I have repaired many TVs using this site. Thanks for asking and show all hands of support!

Posted on Apr 07, 2011

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1 Answer

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If Magic focus will not correct it (it is the limited auto convergence for this set) both the convergence chips which should be stk392-110 or 150 will have to be replaced, convergence is done with the original remote with set in the Decam ( tech convergence mode).

The parts are not that expensive and TVrpairparts.com sells kits with instructions for these sets by model number.

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Your tv is crt-based and is out of convergence. In other words, the settings for keeping the Red, Green and Blue images aligned have drifted and must be reset. This is common with CRT projectors and CRT rear projection tvs.

Refer to your owners manual for instructions on re-aligning it.

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