• Code: 41.5
• Display: 41.5 UNEXPECTED TYPE IN TRAY X
• Description: The printer senses a different media type in the media path than configured in the tray.
• Remedy: 1. Make sure the correct settings are set for the trays. 2. Run a paper path diagnostic test to determine if all sensors are working correctly. 3. Replace the paper feed assembly.

• Code: 49.XXXX
• Display: 49.XXXX PRINTER ERROR
• Description: A critical firmware error has occurred that caused the processor on the formatter to abort operation. This type of error can be caused by invalid print commands, corrupt data, or invalid operations. In some cases, electrical noise in the cable can corrupt data during transmission to the printer. Other causes include poor-quality parallel cables, poor-connections, or home-grown programs. On rare occasions, the formatter is at fault, which is usually indicated by a 79 Service Error.
• Remedy: 1. Turn the printer off then on. 2. Press Stop to clear the print job from the printer memory. 3. Turn the printer off then on. 4. Try printing a job from a different software program. If the job prints, go back to the first program and try printing a different file. If the message displays only with a certain software program or print job, contact the software vendor for assistance. 5. If the message persists with different software programs and print jobs, disconnect all of the cables to the printer that connect it to the network or computer. 6. Turn the printer off. 7. Remove all memory DIMMs or thirdparty DIMMs from the printer. (Do not remove the firmware DIMM.) 8. Remove all EIO devices from the printer. 9. Turn the printer on. 10. If the error no longer exists, install each DIMM and EIO device one at a time, making sure to turn the printer off and on again as you install each device. 11. Replace a DIMM or EIO device if you determine that it causes the error. 12. Remember to reconnect all of the cables that connect the printer to the network or computer. 13. Upgrade formatter and DC Controller firmware. 14. If the error persists, upgrade the firmware compact flash card. 15. Replace the formatter and calibrate the printer.

• Code: 50.X
• Display: 50.X FUSER ERROR
• Description: A fuser error has occurred. The following are specific fuser errors: 50.1: A low fuser temperature error has occurred in the main thermistor. 50.2: A fuser warmup service error has occurred. 50.3: A high fuser temperature error has occurred in the main thermistor. 50.6: An open fuser error has occurred. 50.7: A fuser pressure release mechanism failure has occurred. 50.8: Low fuser sub-thermistor temperature 50.9: High fuser sub-thermistor temperature The error might be due to an inadequate power supply, inadequate line voltage, or a problem with the fuser.
• Remedy: 1. Turn the printer off and allow it to cool down. 2. Reinstall the fuser, and check the connector (J5001) that connects the fuser and the printer. Replace the connector if it is damaged. 3. Replace the fuser. 4. Check all cable connections to/from the DC controller. 5. Replace the low-voltage power supply PCB.

• Code: 51.1Y
• Display: 51.1Y PRINTER ERROR
• Description: A laser error has occurred.
  Y Description: 0 - Black 1 - Cyan 2 - Magenta 3 - Yellow
• Remedy: 1. Turn the printer off then on. 2. Reseat the connectors (J1002 - Y, J1003 - C, J1004 - M, J1005 - K) between the laser/scanner and DC controller PCB. 3. Upgrade formatter and DC Controller firmware. 4. Replace the defective laser/scanner assembly. Calibrate the printer after replacing the laser/ scanner.

• Code: 51.2Y
• Display: 51.2Y PRINTER ERROR
• Description: A laser beam error has occurred.
  Y Description: 0 - Black 1 - Cyan 2 - Magenta 3 - Yellow
• Remedy: 1. Turn the printer off then on. 2. Upgrade formatter and DC Controller firmware, which can be found in a single. 3. Reseat the connectors (J1002 - Y, J1003 - C, J1004 - M, J1005 - K) between the laser/scanner and DC controller PCB. 4. Replace the defective laser/scanner assembly. Calibrate the printer after replacing the laser/ scanner

• Code: 52.X
• Display: 52.X PRINTER ERROR
• Description: A printer error has occurred.
  X Description: 00 - Scanner error 01 - Scanner startup error 02 - Scanner rotation error
  Y Description: 0 - Black 1 - Cyan 2 - Magenta 3 - Yellow
• Remedy: 1. Turn the printer off then on. 2. Upgrade formatter and DC Controller firmware. 3. Reseat the connectors between the laser/scanner and DC controller PCB. 4. Replace the defective laser/scanner assembly. Calibrate the printer after replacing the laser/ scanner.

• Code: 53.XX.X
• Display: 53.XX.X CHECK RAM DIMM SLOT X
• Description: A memory error has occurred.
  X DIMM Type: 1 RAM Y Device Location 1 DIMM Slot 1 2 DIMM Slot 2
  ZZ Error Number: 00 Unsupported memory 01 Unrecognized memory 02 Unsupported memory size 03 Failed RAM test 04 Exceeded maximum RAM size 05 Invalid DIMM speed
• Remedy: If prompted to do so, press to continue. The printer should come to the Ready state, but will not make full use of all memory installed. Otherwise: 1. Turn the printer off. 2. Verify that all memory meets specifications and is correctly seated. 3. Turn the printer on. 4. If the problem persists, replace the DIMM card in the slot indicated.

• Code: 54.XX
• Display: 54.XX PRINTER ERROR
• Description: Printing cannot continue. There is a sensor malfunction. Values of XX are: 01 - Temperature/humidity sensor (J1010 environment sensor) 15 - Yellow toner remaining sensor (J1014 toner level sensor) 16 - Magenta toner remaining sensor (J1014 toner level sensor) 17 - Cyan toner remaining sensor (J1014 toner level sensor) 18 - Black toner remaining sensor (J1014 toner level sensor)
• Remedy: 1. Turn the printer off then on. 2. Check the connectors: J501 on the toner level PCB or J5201 on the environment sensor. 3. Check the connectors: J1014 (toner lever sensor) or J1010 (environment sensor) on the DC controller PCB. 4. Replace the environment sensor or toner level detection PCB