Question about JVC Televison & Video

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I have a JVC I'Art Pro 42" HDTV ready projection TV. Recently, it started intermittently flickering (Picture would go from correct to negative looking). Now this video circuit problem is negative picture looking all the time. The tuner works, all inputs work, sound is fine, and all menus are fine, but he end result is the same no matter what the input. You can barely make out what the picture is. If I go to the convergence utility, I can see that all guns are working. Question is, what's the problem, and can I get a troubleshooting manual with circuit diagrams?

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  • sgwyer7354 Aug 21, 2010

    Hello Ginko,

    If what you say is the case, why do I see all three guns (very solid) on the convergence screen?

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  • sgwyer7354 Aug 21, 2010

    Hi,


    Sorry for the duplicate input, but why would I see all three gun colors on the convergence screen if one of the CRTs was intermittent or out, due to a high voltage disconnection or a faulty component?


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  • JVC Master
  • 19,396 Answers

Hi.

It is not video circuits on main controller or convergence.

This TV uses a CRS system with three CRT tube lamps, red, green and blue.

The problem is likely one or more of the CRT individual high voltage PSUs failing intermittently, if problem is associated to vibration, then it is a cold solder joint , otherwise it is a faulty component.

Posted on Aug 20, 2010

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