Mr Do Castle video right side cut off

JDGJr

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RESOLVED - Mr Do Castle video right side cut off

PCB is new to me. It came with one capacitor pulled apart, so i replaced all capacitors before i had a harness to plug it in.

I've tested the harness and video with both Mr Do and Lady Bug PCBs, and both show a completely stable video image. Both of those boards allow normal horiz and vert position/size adjustment.

However, the Castle board shifts the image left and right depending on the mode - in high score mode (purple picture) the image shifts to the left, and during game play (green picture) the image shifts to the right. I think the purple display is in the right position.

Also, the right edge of the image is cut off - but not compressed - no matter the size adjustment. You can see clearly this on the green picture.

One other oddity: unlike the other two PCBs, the Castle board will only display a steady image when i put a ground connection between the PCB side of the harness and the frame of the monitor.

The cabinet has a Vision Pro 2901 monitor driven by a normal isloation transformer, not the lower voltage transformer from the universal cabinet.

Hope someone has an idea what i can do,
John

was a grounding issue - the 4th wire to the monitor RBG connector was not a good ground.
 

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