• Code: C6130
• Description: Press thermistor broken
• Causes: 1. The press thermistor detected less than 35°C / 95°F for 60s continuously during the warm-up.2. The press thermistor detected less than 35°C / 95°F for 1s continuously after finishing the warm-up.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit. Fuser Unit Replacement 2 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 4 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 5 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit. Fuser Unit Replacement 6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6200
• Description: IH heating error 2
• Causes: 1. The edge thermistor does not detect 80°C / 176°F or more within 60s since starting the warm-up.2. The edge thermistor does not detect the specified temperature (ready indication temperature) within 420s after it detected 100°C / 212°F during the warm-up.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit. Fuser Unit Replacement 2 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 4 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 5 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit. Fuser Unit Replacement 6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 8 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• IH PWB - Engine PWB Electrical Diagram of PWBs 9 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB. IH PWB Replacement 10 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• Fuser IH unit - IH PWB Electrical Diagram of PWBs 11 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit. Fuser IH Unit Replacement

• Code: C6220
• Description: Edge thermistor high temperature error
• Causes: The edge thermistor detected 245°C / 473°F or more for 1s.
• Remedy: 1 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 4 Replacing the fuser unit The temperature is not properly detected due to the broken wire or the thermistor error in the fuser unit. Replace the fuser unit. Fuser Unit Replacement 5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 7 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit. Fuser IH Unit Replacement 8 Reattaching the edge fan motor The edge fan motor is not properly attached. Reattach the edge fan motor. Fan Motors Attachable Direction

• Code: C6230
• Description: Edge thermistor broken
• Causes: C6230: Edge thermistor broken The edge thermistor detects less than 41°C / 105.8°F for 1s continuously when the center thermistor detected 100°C / 212°F or more during the warm-up
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit. Fuser Unit Replacement 2 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 4 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 5 Replacing the fuser unit The temperature cannot be detected properly due to the heater broken or the thermistor error. Replace the fuser unit. Fuser Unit Replacement 6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C6250
• Description: Edge thermistor low temperature error
• Causes: The edge thermistor detected less than 80°C / 176°F for 1s during printing.
• Remedy: 1 Removing foreign material There is foreign material between the fuser unit and the fuser IH unit. Or, foreign material adheres on the heat roller. Remove foreign material if it is on between the fuser unit and the fuser IH unit, or on the heat roller. Then, reinstall the fuser unit. Fuser Unit Replacement 2 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 4 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 5 Replacing the fuser unit The temperature cannot be detected properly due to the heater broken or the thermistor error. Replace the fuser unit. Fuser Unit Replacement 6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 8 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• IH PWB - Engine PWB Electrical Diagram of PWBs 9 Replacing the IH PWB The IH PWB is faulty. Replace the IH PWB. IH PWB Replacement 10 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• Fuser IH unit - IH PWB Electrical Diagram of PWBs 11 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit. Fuser IH Unit Replacement

• Code: C6320
• Description: Middle thermistor high temperature error
• Causes: The middle thermistor detected 245°C / 473°F or more for 1s.
• Remedy: 1 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 4 Replacing the fuser unit The temperature is not properly detected due to the wire short-circuit or the thermistor error in the fuser unit. Replace the fuser unit. Fuser Unit Replacement 5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 7 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit. Fuser IH Unit Replacement 8 Reattaching the edge fan motor The edge fan motor is not properly attached. Reattach the edge fan motor. Fan Motors Attachable Direction

• Code: C6330
• Description: Middle thermistor broken
• Causes: The middle thermistor detects less than 41°C / 105.8°F for 1s continuously when the center thermistor or the edge thermistor detects 100°C / 212°F or more during the warm-up.
• Remedy: 1 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 2 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 4 Replacing the fuser unit The temperature cannot be detected properly due to the heater broken or the thermistor error. Replace the fuser unit. Fuser Unit Replacement 5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 7 Replacing the fuser IH unit The fuser IH unit is faulty. Replace the fuser IH unit. Fuser IH Unit Replacement

• Code: C6410
• Description: Uninstalled fuser unit
• Causes: The unit identification code is mismatched. The unit for other models is installed.
• Remedy: 1 Replacing the fuser unit The fuser unit for other models is installed. Install the fuser unit for the applicable models. Fuser Unit Replacement 2 Reinstalling the fuser unit The drawer connector of the fuser unit is not properly inserted. Check if the pins of the drawer connector of the fuser unit do not bend. If it bend, replace the fuser unit. When the pins are proper, reinstall the fuser unit so that the drawer connector firmly connects. Fuser Unit Replacement 3 Firmware upgrade The firmware is faulty. Reinstall the engine firmware. Firmware Upgrade 4 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Drawer connector of the fuser unit - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 5 Replacing the fuser unit The fuser unit is faulty. Replace the fuser unit. Fuser Unit Replacement 6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement 7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.