Lexmark CX820
Step 1
From the control panel, navigate to:
Settings > Print > Layout > Collate
Touch On [1,2,1,2,1,2].
Print the document.
Is the document collated correctly?
The problem is solved.
Go to step 2.
Step 2
From the document that you are trying to print, open the Print dialog, and then select Collate.
Go to step 3.
Step 3
Reduce the number of pages to print.
Are the pages collated correctly?
Contact customer support.