When print media jams inside the machine, the LCD displays [REC. PAPER JAM] and [OPEN THE FRONT COVER].
There are some areas inside the machine and cartridge which are subject to high voltages and high temperatures. Take adequate precaution when performing internal inspections to avoid burns or electrical shock.
When removing jammed paper from inside the machine, take care not to allow the toner on the jammed paper to come into contact with your hands or clothing. If they become dirty, wash them immediately with cold water. Washing with warm water will set the toner, and make it impossible to remove the toner stains.