Quote:
Originally Posted by Username1
The idea is that you don't use the tv circuits to generate a color, because if the source and circuits are not perfect, other colors are produced.
Besides, if the tv can be made to do this without a test signal, and its one of the few setups you can do without one, why would you want to it any other way.
Electronic M pointed out also if the color circuits are not working right using a test dvd will lead to incorrect colors, he is right too.
You guys can do it any way you want, as a tv tech years ago, no one used a test equipment signal to do purity, mostly because the next step is always setting up gray scale, and brightness range. You will be turning screen controls here anyway...
At any rate, good luck with your adjustments, you can do it any way you like and get comfortable with.....
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Actually what I was trying to say is that the primary test pattern method is only useful on a set where all the video circuits and CRT bias controls are properly functioning and properly adjusted, but the purity is off. I tend to get kind of OCD when I set up CRT bias and tint, and some of my sets (especially ones without built in degauss) occasionally develop purity issues, so instead of disturb the CRT biases and spend a lot of time dialing them back in after the no pattern method I find I can nail the purity fast without making additional work by simply using a primary pattern and only adjusting the yoke and purity rings. I only use the no pattern method when the CRT biases clearly need adjustment as since in that case I need to adjust them anyway there is no advantage in leaving them set as they are.