Open Source Document Management System | OpenKM

I have some pdf files containing large images inside ( images in size of 6000 * 4000 pixels ) which have built from some word documents.
When i upload this documents and go to their preview , it shows some details in a blurry way when I zoom in the document.
But when i open the pdf files directly by the browser (not with openkm) every thing is ok and it will show all the details well.
Is there any way to disable converting pdf files in preview tab ? I mean when i go to preview tab, i want the browser to show the file itself without using any other tools.

Try using the Acrobat plugin preview. Enable the option in the profiles, after you got it enabled, refreshing the URL in the browser to get the change applied and try the PDF again ( now the browser PDF preview support might be in use ).