Please make sure before saving out you pdf file that all images are embedded. This is a precautionary measure as sometimes documents that contain placed PSD’s, show corruption lines when saving out.
If in doubt embed all your images using the link palette.
Resolution
Please note that for best results it is always advised to set your placed images at 125-150dpi. Obviously for really large graphics this can be reduced to anywhere between 50-100dpi. If in doubt please ask.
Tip: Zoom into your graphics on-screen to check resolution.
Economic Automated Printing Process