JVC AV-56WP74 56" Rear Projection HDTV-Ready Television Logo

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Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Picture is yellow

We just purchased this TV from a friend. The picture has a yellowish tint to the picture. When watching a program with a lot of green, it seems like you are looking through Blueblocker sunglasses. I tried adjusting the settings and ran a convergence on it with no real change.

Posted by Art20 on

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  • 3,130 Answers

Your picture tubes are weak or you need to do whats called a grey scale adjustment. In other words you need to put on a totally B&W movie or test pattern and adjust the red , green, and the blue screens to the best B&W you can get. Then you need to adjust the CRT drives to the best grey scale. If you do not know what this is, I'm afraid you should call out a pro to assist you with this alignment, as if you go messing around, and do not know what you are doing, you can make the set landfill material. Not for a novice to do. Good Luck

Posted on Sep 13, 2007

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My tv screen when on turns yellow then after a while it will switch back to normal colors what can be wrong with it....

Televisions covered: all Projection with yellow picture, but not Projection TVs with a yellowish tint surrounding objects in a nearly normal picture.

Yellow = red + green
normal picture = red + blue + green (RGB). See illustration.

12_27_2011_5_00_56_am.png

Fig. 1 Additive color mixing in an RGB monitor, or RGB Projection TV.

The circuitry powering your blue output, or the blue light engine itself is starting to fail.

Operating Theory:

The lamp module shines a bright light into the optical unit; there are a series of lens and baffles, and at the top of the light engine, a lens puts the picture into a mirror which is reflected onto the screen; All video and color is processed thru the light engine. Blue most commonly fails first, leaving a yellow picture.
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http://www.avsforum.com/avs-vb/showthread.php?t=1086180
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Adjusting to the proper color

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