• Code: 122.01
• Description: Service Fuser Error
  Attempting to print with estimated power at or below minimum power.
• Remedy: 1 Some low-voltage power supply FRUs have a voltage selector switch. If it does, the switch needs to be set to the correct voltage for your area. Has the LVPS been changed? Check the switch on the side of the LVPS to verify the correct voltage is set. Go to step 2.
  2 Turn the printer off, and remove the rear shield. See “Rear shield removal”. Check the cable at JFUSES1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Replace the fuser cable. Go to step 3.
  3 Check the connector JLVPS1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Repair or replace the LVPS cable. Go to step 4.
  4 Check the power cable on the left side of the fuser and the thermistor cables and connections on the right side of the fuser. Are the cables or connectors damaged? Repair the cables. If the cables cannot be repaired, replaced the fuser. See “Fuser assembly removal”. Go to step 5.
  5 Check the following values at JFUSES1: Are the values approximately correct? Go to step 6. Replace the controller board. See “Controller board removal”.
  6 Replace the fuser. See “Fuser assembly removal”. Does the error clear? Problem resolved. Replace the controller board. See “Controller board removal”.

• Code: 122.02
• Description: Service Fuser Error
  Fuser over temperature.
• Remedy: 1 Some low-voltage power supply FRUs have a voltage selector switch. If it does, the switch needs to be set to the correct voltage for your area. Has the LVPS been changed? Check the switch on the side of the LVPS to verify the correct voltage is set. Go to step 2.
  2 Turn the printer off, and remove the rear shield. See “Rear shield removal”. Check the cable at JFUSES1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Replace the fuser cable. Go to step 3.
  3 Check the connector JLVPS1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Repair or replace the LVPS cable. Go to step 4.
  4 Check the power cable on the left side of the fuser and the thermistor cables and connections on the right side of the fuser. Are the cables or connectors damaged? Repair the cables. If the cables cannot be repaired, replaced the fuser. See “Fuser assembly removal”. Go to step 5.
  5 Check the following values at JFUSES1: Are the values approximately correct? Go to step 6. Replace the controller board. See “Controller board removal”.
  6 Replace the fuser. See “Fuser assembly removal”. Does the error clear? Problem resolved. Replace the controller board. See “Controller board removal”.

• Code: 122.03
• Description: Service Fuser Error
  Fuser open thermistor check failed.
• Remedy: 1 Some low-voltage power supply FRUs have a voltage selector switch. If it does, the switch needs to be set to the correct voltage for your area. Has the LVPS been changed? Check the switch on the side of the LVPS to verify the correct voltage is set. Go to step 2.
  2 Turn the printer off, and remove the rear shield. See “Rear shield removal”. Check the cable at JFUSES1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Replace the fuser cable. Go to step 3.
  3 Check the connector JLVPS1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Repair or replace the LVPS cable. Go to step 4.
  4 Check the power cable on the left side of the fuser and the thermistor cables and connections on the right side of the fuser. Are the cables or connectors damaged? Repair the cables. If the cables cannot be repaired, replaced the fuser. See “Fuser assembly removal”. Go to step 5.
  5 Check the following values at JFUSES1: Are the values approximately correct? Go to step 6. Replace the controller board. See “Controller board removal”.
  6 Replace the fuser. See “Fuser assembly removal”. Does the error clear? Problem resolved. Replace the controller board. See “Controller board removal”.

• Code: 122.04
• Description: Service Fuser Error
  Fuser reached start temperature too quickly.
• Remedy: 1 Check the clearance around the printer. See “Clearances” or check the chart below: Does the error clear? Problem resolved. Make sure the proper clearance is maintained.
  2 Check the fuser connections on the fuser, at JFUSES1 on the controller board, and the AC connection at the LVPS. Are the connections correct? Replace the fuser. See “Fuser assembly removal”. Problem resolved.
  3 Turn the printer on, and then check the following values at JFUSES1. Are these values approximately correct? Replace the fuser assembly. See “Fuser assembly removal”. Replace the controller board. See “Controller board removal”.

• Code: 122.05
• Description: Service Fuser Error
  Fuser failed to reach final temperature in time.
• Remedy: 1 Check the clearance around the printer. See “Clearances” or check the chart below: Does the error clear? Problem resolved. Make sure the proper clearance is maintained.
  2 Check the fuser connections on the fuser, at JFUSES1 on the controller board, and the AC connection at the LVPS. Are the connections correct? Replace the fuser. See “Fuser assembly removal”. Problem resolved.
  3 Turn the printer on, and then check the following values at JFUSES1. Are these values approximately correct? Replace the fuser assembly. See “Fuser assembly removal”. Replace the controller board. See “Controller board removal”.

• Code: 122.06
• Description: Service Fuser Error
  Estimated power is at or below minimum power.
• Remedy: 1 Check the clearance around the printer. See “Clearances” or check the chart below: Does the error clear? Problem resolved. Make sure the proper clearance is maintained.
  2 Check the fuser connections on the fuser, at JFUSES1 on the controller board, and the AC connection at the LVPS. Are the connections correct? Replace the fuser. See “Fuser assembly removal”. Problem resolved.
  3 Turn the printer on, and then check the following values at JFUSES1. Are these values approximately correct? Replace the fuser assembly. See “Fuser assembly removal”. Replace the controller board. See “Controller board removal”.

• Code: 122.11
• Description: Service Fuser Error
  Fuser under temperature error while in standby.
• Remedy: 1 Some low-voltage power supply FRUs have a voltage selector switch. If it does, the switch needs to be set to the correct voltage for your area. Has the LVPS been changed? Check the switch on the side of the LVPS to verify the correct voltage is set. Go to step 2.
  2 Turn the printer off, and remove the rear shield. See “Rear shield removal”. Check the cable at JFUSES1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Replace the fuser cable. Go to step 3.
  3 Check the connector JLVPS1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Repair or replace the LVPS cable. Go to step 4.
  4 Check the power cable on the left side of the fuser and the thermistor cables and connections on the right side of the fuser. Are the cables or connectors damaged? Repair the cables. If the cables cannot be repaired, replaced the fuser. See “Fuser assembly removal”. Go to step 5.
  5 Check the following values at JFUSES1: Are the values approximately correct? Go to step 6. Replace the controller board. See “Controller board removal”.
  6 Replace the fuser. See “Fuser assembly removal”. Does the error clear? Problem resolved. Replace the controller board. See “Controller board removal”.

• Code: 122.12
• Description: Service Fuser Error
  Fuser under temperature error while printing.
• Remedy: 1 Some low-voltage power supply FRUs have a voltage selector switch. If it does, the switch needs to be set to the correct voltage for your area. Has the LVPS been changed? Check the switch on the side of the LVPS to verify the correct voltage is set. Go to step 2.
  2 Turn the printer off, and remove the rear shield. See “Rear shield removal”. Check the cable at JFUSES1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Replace the fuser cable. Go to step 3.
  3 Check the connector JLVPS1 for proper connection to the controller board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? Repair or replace the LVPS cable. Go to step 4.
  4 Check the power cable on the left side of the fuser and the thermistor cables and connections on the right side of the fuser. Are the cables or connectors damaged? Repair the cables. If the cables cannot be repaired, replaced the fuser. See “Fuser assembly removal”. Go to step 5.
  5 Check the following values at JFUSES1: Are the values approximately correct? Go to step 6. Replace the controller board. See “Controller board removal”.
  6 Replace the fuser. See “Fuser assembly removal”. Does the error clear? Problem resolved. Replace the controller board. See “Controller board removal”.