52 ERROR CALL FOR SERVICE Meaning: The printer has detected an error in the print mechanism. Action: Call for service. 53 ERROR CALL FOR SERVICE Meaning: The printer has detected a problem with the main motor. Action: Call for service. 54 ERROR CALL FOR SERVICE Meaning: The printer has detected a problem in the duplex unit. Action:   Make sure the duplex unit is installed correctly.   Call for service if the
problem continues. 55 ERROR CALL FOR SERVICE Meaning: The printer has detected a problem with the fan. Action: Call for service. 56 ERROR CALL FOR SERVICE Meaning: The printer has detected an error in the engine NVRAM. Action: Call for service. 57 ERROR CALL FOR SERVICE Meaning: A problem has occurred. Action: Call for service. 58 TRAY 1 ERROR CALL FOR SERVICE Meaning: The printer cannot detect TRAY1. Action: Call for service. 61 ERROR CALL FOR SERVICE Meaning: The printer has detected an error in the ROM checksum. Action: Call for service. 62 ERROR CALL FOR SERVICE Meaning: The printer has detected an error in the DRAM. Action: Call for service. 63 ERROR CALL FOR SERVICE Meaning: The printer has detected an error in the NVRAM (EEPROM). Action: Call for service. 71 ERROR DISK Meaning: The printer has detected a problem with the hard drive. Action: Call for service. 72 ERROR DISK Meaning: The printer has detected a problem with the hard drive. Action: Call for service. Appendix B.   Printer Messages 169