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SnakeGrunger

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Posts posted by SnakeGrunger

  1. Hi everyone,

     

    I have a Vectrex of a friend of mine and asked me to do change all its capacitors, which I did, but one problem remained : uneven scanline distribution. Here's a video of the problem :

     

     

    As you can see, most lines (in text) and not evenly distributed, the corners on the startup screen logo don't touch either.

     

    Here's what I did :

    - Replace absolutely all the electrolytic capacitors on both the mainboard and power/video board. (and taking care of soldering on the top and bottom exposed holes that don't have copper going down the via)

    - Replace the 5 small styrene caps near the op-amp on the cpu board with film caps of equal capacity.

    - Replace all the single-wipe sockets with double-wipe.

    - Did the de-buzz audio mod which works very well.

     

    Does anyone have an idea of what may be wrong or which IC I should check more closely ?

     

    Thanks!

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