Lexmark 630 사용자 설명서

Remove any sheets of print media lying in the duplex front access cover.

Hold the duplex front access cover level while you slide it back into the duplex unit. Make sure 
it snaps into place.

Slide the standard tray back into the printer.

Note: To resolve the message, you must clear all print media from the print media path.

Push the release latch and open the printer upper and lower front doors. 

The rear portion of the inside of the printer is hot.

Interior view of duplex unit