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Question about NEC MultiSync MT830 Multimedia Projector

4 Answers

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!

Posted by Anonymous on

  • 3 more comments 
  • Anonymous Jan 26, 2008

    Did anyone get anywhere with a fix to adjusting color convergence?

    I have an NEC MT1030+ that has a magenta shadow to the left and above objects in the picture. I cannot figure out how to get into the menu that has convergence in it?
    I have seen posts on "AVS Forum.com" that talk about NEC projects having a 4digit code to enter after pushing the 'adjust' button. I have neither that button, or numerals to push for a code.

    Any help is appreciated.
    thx

  • sweli Jan 26, 2008

    Does anyone know how to get into the convergence menu's on an NEC MT1030+ ??
    I have a magenta shadow to the left and above objects in the image.

    I have seen posts on AVSforum.com that suggest pressing the 'adjust' button and a four digit code. I have neither on my remove or projector.

    Any help is appreciated!
    thx

  • roye Feb 06, 2008

    Hi, I have a similar problem with my LT 158 but the other way around - yellow to the left and blue to the right. Did you manage to get your problem sorted? If so I'd like to hear how to do it if possible.

    Thanks

    Roye

  • fahad kaleem Jun 12, 2008

    hi i have a problem that wen i replace the lcds of the prjectors MT1050 and MT1040 from the brand known as Nec i dunn get the perfect result my profession is to do so but i dunn get the required and satisfying result is there a software or a method of doin this act perfectly ??
    thanks in anticipation
    plz  if any one of the visitors reads this and noes the solution to this reply me on this email adress
    [email protected]

  • ausivic Aug 01, 2008

    Where are the adjustments on the main video board of the projector for alignment of the three LCD screens,

    Thanks

    Victor

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4 Answers

Anonymous

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

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Anonymous

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


[email protected]

Posted on Mar 09, 2008

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Anonymous

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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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Take a look here: http://www.extremetech.com/article2/0,1697,1049289,00.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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Solutions (1)

Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from www.TvRepairKits.com and do the repair yourself. Its a fairly easy DIY fix.
Here is an example photo.... louis66_0.jpg

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Check pico fuses.Reset convergence alignment.

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Change both STK convergence IC's for reliability. They amplify/control both horiz and vertical. re-align after replacement.Locate them on the largest heat sink in your set!
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Your set is starting to get a convergence problem and the only way to repair it is by changing the convergence IC's,(3)one for each color,the blue migh be showing more now but soon all 3 colors will be out of alignment and you will not be able to correct it with the custumer controls,is great that it has worked for so long without this problem,if you are familiar with tv service you have a place to check but if you are not too familiar be safe and call for help from a pro-servicer.Let Us know how it goes.
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