Lexmark MX931
Printing in duplex using an A5 size paper is causing 200.xx paper jams.
It is observed that the leading edge of the paper is usually stuck in the photoconductor.
Go to Lexmark.com.
Click Supplies & Accessories. In the dropdown menu, click Find Supplies.
In the search bar, type the printer model or supplies part number. Click Find my supplies.
In the product page, scroll down and look for the Supplies tab.
Choose the product to order and Add to Cart.
Remove paper that jammed in the staple finisher to continue stapling and printing.
Remove paper that is stuck in the standard tray to continue printing.