Lexmark MX511
Using the appropriate paper prevents jams and helps ensure trouble‑free printing.
To help avoid paper jams and poor print quality:
242.42 Paper Jam Error on a Lexmark MS310, MS410, MS510, MS610, MX310, MX410, MX510, MX510, MX610, or MX611 Printer/MFP
The printer posts a 230.03 paper jam error with the paper stopping at the rear door. See this article for troubleshooting steps.