• Code: 50.2X.YZ
• Display: 50.2X.YZ
• Description: Fuser warm-up error
• Remedy: action1. Remove and reinstall the fuser. Make sure that it is seated correctly.2. Make sure that there is no residual paper in the fuser.3. Check the printer power source. Make sure that the power source meets printer requirements. Make sure that the printer is the only device using the circuit.4. Check the connector (J50) between the fuser and printer. If the connector is damaged, replace the connector assembly or the Fuser5. Reconnect the connector (J128) on the DC controller PCA, connector (J600) on the low voltage power supply assembly and the connectors (J6002 and J6003) on the fuser power supply assembly6. If the issue persists, replace the fuser.7. If error still remains, replace the fuser power supply assembly. Fuser Power Supply assembly Part number: RM2-7125-000CN 8. Replace the low-voltage power assembly.

• Code: 50.3X.YZ
• Display: 50.3X.YZ
• Description: High fuser temperature
• Remedy: 1. Remove and reinstall the fuser. Make sure that it is seated correctly. 2. Make sure that there is no residual paper in the fuser. 3. Check the paper type setting in the printer control panel menus and in the print driver. Make sure that the settings match and are correct for the type of media being used. 4. Check the connector (J50) between the fuser and printer. If the connector is damaged, replace the connector assembly or the Fuser. 5. If the issue persists, replace the fuser. 6. If error still remains, replace the Fuser Power Supply assembly Part number: RM2-7125-000CN.

• Code: 50.4X.YZ
• Display: 50.4X.YZ
• Description: Drive circuit fault
• Remedy: 1. Remove and reinstall the fuser. Make sure that it is seated correctly. 2. Check the printer power source. Make sure that the power source meets printer requirements. Make sure that the printer is the only device using the circuit. NOTE: If the printer does not meet the power requirement of 43 to 67Hz frequency, the fuser temperature control does not work properly and this will cause the malfunction. 3. Reconnect the connector (J128) on the DC controller PCA. 4. Replace the fuser power supply assembly.

• Code: 50.6X.YZ
• Display: 50.6X.YZ
• Description: Open fuser circuit (heating element failure)
• Remedy: 1. Remove and reinstall the fuser. Make sure that it is seated correctly. 2. Check the connector (J50) between the fuser and printer. If the connector is damaged, replace the connector assembly or the Fuser. 3. If the issue persists, replace the fuser.4. If error still remains, replace the Fuser Power Supply assembly Part number: RM2-7125-000CN.

• Code: 50.7X.YZ
• Display: 50.7X.YZ
• Description: Fuser pressure-release mechanism failure
• Remedy: action1. Remove and reinstall the fuser. Make sure that it is seated correctly.2. Check the gear for releasing pressure of the fuser. If the gear is damaged, replace the fuser.3. Check the gear for releasing pressure of the fuser on printer side. If the gear is damaged, replace the fuser drive assembly.4. Run the sensor test in the sensor monitor mode to verify that the fuser pressure release sensor is functioning properly. If it is not, replace the fuser pressure release sensor.5. Run the fuser depressurization drive test in the actuator drive mode to verify that the fuser depressurization is functioning properly. If it is not, replace the fuser motor.6. Reconnect the connector (J79) of the fuser pressure release sensor and the connector (J115) on the DC controller PCA.7. Replace the fuser.

• Code: 50.8X.YZ
• Display: 50.8X.YZ
• Description: Low fuser temperature 2
• Remedy: 1. Remove and reinstall the fuser. Make sure that it is seated correctly.2. Make sure that there is no residual paper in the fuser.3. Check the connector (J50) between the fuser and the printer. If it is damaged, replace the fuser drive assembly or fuser.4. Reconnect the connector (J2603) on the fuser control PCA and connector (J116) on the DC controller PCA5. If the issue persists, replace the fuser.6. If error still remains, replace the Fuser PCA assembly. Fuser Power Supply assembly Part number: RM2-7125-000CN.7. If error still remains, replace the Fuser Power Supply assembly Part number: RM2-7125-000CN.

• Code: 50.9X.YZ
• Display: 50.9X.YZ
• Description: High fuser temperature 2
• Remedy: 1. Remove and reinstall the fuser. Make sure that it is seated correctly.2. Make sure that there is no residual paper in the fuser.3. Check the paper type setting in the printer control panel menus and in the print driver. Make sure that the settings match and are correct for the type of media being used.4. Check the connector (J50) between the fuser and printer. If the connector is damaged, replace the connector assembly or the Fuser.5. If the issue persists, replace the fuser.6. If error still remains, replace the Fuser PCA assembly.

• Code: 50.AX.YZ
• Display: 50.AX.YZ
• Description: Low fuser temperature 3
• Remedy: action1. Remove and reinstall the fuser. Make sure that it is seated correctly.2. Make sure that there is no residual paper in the fuser.3. Check the connector (J50) between the fuser and the printer. If it is damaged, replace the fuser drive assembly or fuser.4. Reconnect the connector (J2603) on the fuser control PCA and connector (J116) on the DC controller PCA5. If the issue persists, replace the fuser.6. If error still remains, replace the Fuser PCA assembly.7. If error still remains, replace the Fuser Power Supply assembly Part number: RM2-7125-000CN.