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Question about Hitachi CM811 Plus 21 in. CRT Monitor

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Color Adjustments How can you get into the menus to adjust the colors once you replace a CRT with a new one? There appears to be some type of serial connections for this. Is there an easy workaround.

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Anonymous

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Why would you want to change the color settings after changing a CRT? changing a CRT should not affect the color settings! please describe the nature of the problem with more details.

Posted on Jan 30, 2006

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JVC AV-27S33 only displays black and white (Color gone) Menus are still in color!

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When you replace the entire board in a Zenith TV, you must make the adjustments to align the new chassis with the old picture tube. You must adjust the CRT bias and drives as well as the horizontal and vertical parameters. On the older boards there were controls on the main and CRT boards but on the newer boards the adjustments are made with the remote control after entering the service mode. Tune in the shopping channel QVC, set the color and contrast to minimum and lower the brightness until the picture is just visible. Set the CRT bias settings for a pure black and white image, then increase the brightness and contrast to get a very bright picture and if necessary adjust the drive settings so that the bright picture is pure black and white. Return the video settings to normal and then adjust the vertical and horizontal settings so that the info boxes on QVC are centered top, left and bottom. If you are not sure that you can do that right then have a qualified tech handle it for you.
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Color adjustment for CM 811U

Hi, if you are referring to the replacement of the picture tube, then yes, the color will have to be adjusted. However this should have been done by the tech personnel who did the replacment with a color bar generator and alignment tools. You can also try pressing the degauss button on the monitor to see if the color balances back. Hope this be of some help. Good luck
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First adjust the contrast level 25 percent.Now see there is any improvement. If the performance is well there is a problem in video section. May be capacitor leakage like 180v supply filter, and coupling capacitor in video section.
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