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There are three color projection tubes in this puppy. Which one you gonna play with? All three have a control grid in them. One can't help but wonder why someone would want to do this.... To access the control grid of any cathode ray tube (and picture and projection tubes qualify), the set will have to be take apart to permit access to the internals. Note: if you are not at all familiar with electronics and what precautions are necessary when working around high voltage, leave this one alone! That said, a peek inside will reveal the three projection tubes in the back, and the easiest way to access a control grid would be to find the wiring harness and plug assembly that hooks up to the back of the projection tube to connect it to the circuitry that drives it (the circuit board). Now listen up. Information is provided here because someone wants it. The individuals who use the information without care and knowledge do so at their own risk. You can be injured or killed by connecting yourself to energized circuits. And the tubes run hot! You can be burned by them. Lastly, it is a know fact that individuals who are curious about stuff are gonna get the information they want however and where ever they can. It is provided here because it is firmly believed that, since the info is going to be gotten regardless, by getting it here, the curious person can be fully advised of the hazards possible in working on something like this. There is no good reason to fool around with the grid wiring (or any other wiring) on the projection tubes of a $1000 + Sony TV. If there is a problem with the set, it almost certainly isn't with the wires. It don't work dat way. Be smart about this one, Sparky. The life you save may be your own.

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Q: How do you access the color grid of a Sony KP-43HT20 rear projection television?
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