Wells Gardner repeated image

Discussion in 'General Electronics Chat' started by bgearyny, Mar 6, 2009.

  1. bgearyny

    Thread Starter New Member

    Mar 6, 2009
    1
    0
    Hello,

    I currently own a full size arcade game "Mr. Do!" that contains a WG19K4675 CRT monitor. I am having a problem with the image -- it is repeated approximately four times on screen, but it is not isolated by red, green, or blue individual images. Instead it appears as if a fraction of the whole image is included in each of the four vertical sections. I have attached a picture of the screen showing the repeat problem.

    Can anyone suggest whether this would be a convergence problem or more likely something else?

    [​IMG]
     
  2. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    Almost looks like your vertical oscillator is running at the multiple or sub-multiple of the proper frequency. Does the display have a Vertical Hold control? If so, try adjusting it.
     
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