Question about NEC MultiSync MT830 Multimedia Projector

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MT830 Color Convergence (Blue Left - Yellow Right)

MT830 suddenly developed vertical color alignment issues. Yellow is trimming everything on their right edge and Blue is trimming everything on the left edge. This is only affecting the vertical edging of objects. The horizontal edges of objects appear to be fine. convergence I think it is acutally the Blue that is off to the Left. I have been through the alignments for vertical with no change. I am able to turn brightness and contrast down to minimize the distinction of the yellow and blue edges, but you can still see them. Thanks for helping!

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Re: MT830 Color Convergence (Blue Left - Yellow Right)

Sometimes a bad cable can produce a delay in signal, if shift is only in horizontal, check cable grounds. Of course, also can be an optical problem, but first check that. And check if the problem occurs with menues (they dont pass througt external cable)

Posted on Apr 09, 2008

Re: MT830 Color Convergence (Blue Left - Yellow Right)

I have mitsubishi projector,Model **-LVPS50U. The problem is that lcd panel (R G B) convergance mismatch, So,kindly help me how can i adjust convergance of RGB? I am wating for your reply.

Dhruba Bagchi

Posted on Mar 09, 2008

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Re: MT830 Color Convergence (Blue Left - Yellow Right)

Time for a new projector, of course i could sugest a few diferent projectors but i think i will only suggest one since i dont know what your projectors main application is. in my poinion the pk20 LED projector by mitsubishi is a very nice inexpensive projector with a lamp life of over 20,000 hours and costing about the same price as one lamp replacement for most dlp projectors the mitsubishi pk20 LCD projector will last for a very long time and by then there will be a better model available and posibly be less expensive, i have found these projectors advertised from anywhere between $300USD and $700USD at regular retail price but i bet you can get one for less on eBay. GOOD LUCK and BEST WISHES!

Posted on Nov 29, 2007

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Re: MT830 Color Convergence (Blue Left - Yellow Right)

Take a look here:,1697,1049289,00.asp "... The others, however, have lost portions or all of their blue channels. TI's theory is that the shorter wavelength and higher energy of the blue light apparently causes the organic polarizing material in the LCD to get lightburn much faster. TI showed us a damaged LCD panel that controlled blue light transmission, and there was a large spot in the center that was apparently burned out..."

Posted on Oct 31, 2006

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