Paths on illustrator are deformed when size is decreased significantly

I made an artboard of 1500 x 1500 pixels with  some type in it, the type was converted to outline. Then i descreased the size of the artboard to 150 x 150 pixels and the type (outline) became deformed, So I had to use Illustrator CS6 to do it. I decreased the size of the artboard and the path kept its orginal shape.