rip off graphics error

chas010

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Hi guys I picked up an old vector Ripoff! game and the graphics may be slightly skewed. The vector lines dont line up exactly as they should at the corners of the triangles. All voltages check out ok and I dont see any adjustment points for anything other than size and purity rings. Does this sound like a board issue?
 
I don't have a rip off,but on star castle there are blue adjustment pots on the monitor chassis.If that doesn't work the lf13331 analog chip might be bad.
 
Thanks Tim! Can I borrow the monitor out of the star castle and put it in ripoff to see if its boards or monitor? the graphics dont line up like they should at all, lots of miss matched lines and open triangles.
 
I'm betting its the monitor - I've seen this before on a Cine game but never had to fix this symptom myself. I'd be looking a the small pots on the monitor first...
 
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