Not nearly enough info and a screenshot would help.
the screen shot is huge and clearly the black lines can be seen,that 1pt black stroke is been printed for some reason.
what other info can be helpful for me to include in this post?
oops,i found it,i have accidently added a stroke to that frame which the paper texture, thats whats printed.so foolish of me.
Hard to know what that is - have you got a frame around the image? Is the frame in the source image? When you make the PDF have you selected the option to "Include visible guides and grids"?
Also the black line is outside your crop marks - however, you haven't offset your crop marks to be at the edge of the bleed.
Set the Crop Marks to be outside the bleed area by choosing the Offset option in the Marks and Bleeds. If your bleed is 5mm then choose an offset of 5mm or slightly more, for example.