HP LaserJet 9000 Printer series - Manual (Page 182)

Appendix B Control panel menus 182
Configure device menu
APPEND CR TO LF=NO YES
NO Select YES to append a carriage return to each line feed encountered in
backward-compatible PCL jobs (pure text, no job control). Some
environments, such as UNIX, indicate a new line using only the line
feed control code. This option allows the user to append the required
carriage return to each line feed.
Item Values Explanation