Inventor to AutoCAD conversion - print issue

I am using Inventor 2010 for our project. We are doing drafting in Inventor 2010. When I convert drawings to AUTOCAD, the files are not being printed good. If I use monocrome option also, yellow color of the drawing shows as yellow color in print preview. its not the issue with yellow only. except black, all colors showing in their same color in the print preview.
I observed that if I select the 255,255,0 color and changed to Yellow, then I am able to print them in black. I can not do this for thousands of my files. please provide me solution

Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.