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CRT Convergence Diverging

Discussion in 'Electronic Repair' started by Gary Tait, Apr 24, 2007.

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  1. Gary Tait

    Gary Tait Guest

    Just wondering.

    I have a Proview PV546D PC monitor, and at 1024x768, with a convergence
    grid on the screen (as a tiled backgound) shows beam spits into two as it
    nears the bottom or top of the screen, worser at the bottom, to a point
    that only the middle third is legible on smaller text.

    Is that the way it is, or my monitor has exceeded life, or is fixable?

    There is also a vertical mis-linearity, which I can't seem to do much
  2. Jeroni Paul

    Jeroni Paul Guest

    Convergence at the edges is set by ring magnets next to the deflection
    coils, but there could be some small coils to finely tune it. If it
    has bad caps as shown by some bad vertical linearity, these coils
    might not be receiving the right signals. You should ESR all related
    caps or troubleshoot driving circuits.

    If problem persists, the cathode wear causes a shift of the electron
    beam origin that slightly changes convergence / purity adjustments.
    Also if deflection coils have moved.
  3. Art

    Art Guest

    Thre actually may be a service only menu that allows fringe registration
    adjustments without resorting to the magnets and probably messing up the
    centre settings. Best to contact a tech with more experience with the
    Proview products.
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