• Code: 4700
• Description: VIDEO_ASIC device error Communication with the video ASIC has failed 5 times successively. After writing to VIDEO ASIC, the error that the reading value from same address does not match occurs 8 times successively.
• Causes: Main/Engine PWB
• Remedy: 1. Unplug the power cord from the wall outlet, and wait five seconds. Then plug the power cord and then turn on the power switch. 2. Check that the connectors on the Main/ Engine PWB are properly connected, and if not, re-connect them. 3. Replace the Main/Engine PWB.

• Code: 6000
• Description: Broken fuser main heater wire During the warming up, the temperature detected by the center thermistor does not reach 100 °C/212.0 °F for 20 s. During the warming up, the temperature detected by the center thermistor does not reach the stable display temperature for 30 s successively, after it reach to 100 °C/212.0 °F.
• Causes:
• Remedy: Fuser unit 1. Check there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 3. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 4. If the fuser heater is not turned on (broken thermostat wire), replace the fuser unit. Power source PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Power source PWB (YC105) and Main/ Engine PWB (YC20) 2. Replace the power source PWB. Exit PWB Replace the Exit PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 6020
• Description: Abnormally high fuser center thermistor temperature The center thermistor detected the temperature exceeds 240 °C/464.0 °F. for 1 s successively.
• Causes:
• Remedy: Fuser unit 1. Check there is no paper jam. 2. Check if the fuser roller has foreign objects such as the toner contamination. 3. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 4. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 5. Replace the fuser unit. Power source PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Power source PWB (YC105) and Main/ Engine PWB (YC20) 2. If the fuser heater is turned on at all times, replace the power source PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Check if the Main/Engine PWB is properly secured with screws. 3. Replace the Main/Engine PWB.

• Code: 6030
• Description: Broken fuser center thermistor wire During the edge thermistor detects more than 30 °C/86.0 °F, the center thermistor detects low temperature for 1.6 s.
• Causes:
• Remedy: Fuser unit 1. Check there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 3. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 4. Replace the fuser unit. Exit PWB Replace the Exit PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 6040
• Description: Fuser heater error Input value from the fuser center thermistor is abnormal for 1 s successively.
• Causes:
• Remedy: Fuser unit 1. Check there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 3. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 4. Replace the fuser unit. Exit PWB Replace the Exit PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 6050
• Description: Abnormally low fuser center thermistor temperature During the warming up and the printing, the center thermistor has detected less than 100 °C/212.0 °F. for 1 s successively.
• Causes:
• Remedy: Reduction of the power supply voltage 1. Check that no voltage drop of more than 10% of the rated is caused during printing. 2. If the power is overloaded, change the AC outlet that supplies power. Fuser unit 1. Check there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 3. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 4. If the fuser heater is not turned on (broken thermostat wire), replace the fuser unit. Power source PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Power source PWB (YC105) and Main/ Engine PWB (YC20) 2. Replace the power source PWB. Exit PWB Replace the Exit PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 6200
• Description: Fuser heater error (SUb heater: for 35ppm models) During the warming up, even if the main heater (sub heater for 35ppm models) is turned on for 30 s successively, the temperature detected by the edge thermistor does not reach 100 °C/212.0 °F. During the warming up, the temperature detected by the edge thermistor does not reach the stable display temperature, even if the main heater (sub heater for 35ppm models) is turned on for 30 s successively, after the temperature detected by the edge thermistor has reached to 100 °C/212.0 °F.
• Causes:
• Remedy: Fuser unit 1. Check there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 3. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 4. If the fuser sub-heater is not turned on (broken thermostat wire), replace the fuser unit. Power source PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Power source PWB (YC105) and Main/ Engine PWB (YC20) 2. Replace the power source PWB. Exit PWB Replace the Exit PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the Main/Engine PWB.

• Code: 6220
• Description: Abnormally high fuser heater temperature The temperature detected by the edge thermistor exceeds 240 °C/464.0 °F for 1 s successively.
• Causes:
• Remedy: Fuser unit 1. Check there is no paper jam. 2. Check if the fuser roller has foreign objects such as the toner contamination. 3. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit and Exit PWB (YC2) Exit PWB (YC1) and Main/Engine PWB (YC11) 4. If the wiring is disconnected, short-circuited or has ground fault, replace the wire. 5. Replace the fuser unit. Power source PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Power source PWB (YC105) and Main/ Engine PWB (YC20) 2. If the fuser heater is turned on at all times, replace the power source PWB. Main/Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Check if the Main/Engine PWB is properly secured with screws. 3. Replace the Main/Engine PWB.