Contact Pantone, Inc. for a current list of qualified licensees. Contents Resources. 1 Error Messages. 1 Diagnosing Print Quality. 2 Calibration. 3 Paper Jams. 4 Preventing jams. 5 What causes a paper jam?. 5 Jam at the fuser. 5 Jam at the duplex unit. 7 Jam at the Multi-Purpose Tray. 8 Jam at the registration roller. 9 Jam at the tray. 11 Regular Printer Maintenance. 14 Cleaning the outside of the printer. 14 Cleaning the density sensor. 15 Replacing a Toner Cartridge...