• Code: 397-00
• Description: Color drum motor error The motor LOCK signal is not detected for more than 2 seconds while the motor START signal is on.
• Causes: • PCDU overload • Drum motor (K) failure (SC396) • Drum motor (CMY) failure (SC397)
• Remedy: • Replace the PCDU. • Replace the drum motor (K) (SC396) • Replace the drum motor (CMY) (SC397)

• Code: 442-00
• Description: Image transfer belt contact motor error ITB contact HP sensor cannot detect the sensor feeler condition within a specified time even when the ITB contact motor rotates. • Contact/Release: 5000 msec • Homing: 10000 msec • Sampling interval: 10 msec
• Causes: • Broken harness or defective connectors • Disconnected connector of image transfer belt contact sensor or motor • Defective image transfer belt contact motor • Image transfer belt unit not installed
• Remedy: 1. Set the ITB unit firmly. 2. Replace the ITB unit. 3. Clean the ITB contact HP sensor. 4. Check the harnesses. 5. Replace the ITB contact HP sensor. 6. Replace the ITB contact motor.

• Code: 491-00
• Description: High voltage power: Charge/Development bias output error Incorrect PWM signal is detected 10 times for consecutive 20 seconds.
• Causes: Hardware related causes: • Contact failure • Loose connector (Controller side) • Grounding, open-circuit in the high voltage route • Arc discharge due to lack of space • Shorted harness (Controller side) • BiCU malfunction (Signal error) • Power pack (Development/Transfer) failure Load related causes: • Short-circuit • Arc discharge due to lack of space • Deteriorated drum (overcurrent) • Condensated drum (overcurrent) • Incorrect gap between drum and charge roller (incorrect PCDU) • PCDU not installed firmly
• Remedy: First, cycle the main power off/on to check if this SC occurs again. If this SC reoccurs, do the following: 1. Remove and install the PCDU again to make sure that the PCDU is firmly set. Cycle the main power off/on to check if this SC occurs again. If the SC occurs again, go to the next step. 2. Check if there are scratches on the drum surface. If you can see the internal element of the drum (plain pipe) on the surface, go to the next step, because too much electricity can flow at this point, which caused the SC. 3. Replace the PCDU and cycle the main power off/on to check if this SC occurs again. 4. Reconnect the connector (CN561) on the BiCU and cycle the main power off/on. Be careful not to bend the connector pins when reconnecting. If the SC occurs again, go to the next step. 5. Reconnect the connector (CN801) on the power pack (charge/ development) and cycle the main power off/on. If the SC occurs again, go to the next step. 6. Remove and install the power pack (charge/development) again and cycle the main power off/on. Check if the spring near the power pack terminal bends and comes in contact with other contacts. Cycle the main power off/on to check if this SC occurs again. 7. Replace the power pack (charge/development) and cycle the main power off/on to check if the SC occurs again. 8. Replace the BiCU and cycle the main power off/on to check if the SC occurs again. 9. Make sure that the harnesses on the power pack (charge/development) are not shorted. If not good, replace the harness and cycle the main power off/on.

• Code: 492-00
• Description: High voltage power: Transfer bias output error Incorrect PWM signal is detected for 200ms.
• Causes: Hardware related causes: • Contact failure • Loose connector (Controller side) • Grounding, open-circuit in the high voltage route • Shorted harness (Controller side) • BiCU malfunction (Signal error) • Power pack (Transfer) failure Load related causes: • Increased impedance in the paper transfer roller • Increased impedance in the ITB • Open-circuit • Transfer unit not installed firmly
• Remedy: • This is a logging SC (No action required).

• Code: 497-00
• Description: Image creation temperature sensor error 1 The thermistor output of the temperature sensor is not within the prescribed range (more than 0.5 V to less than 3.0 V).
• Causes:
• Remedy: Cycle the main power off/on to check if this SC occurs again. If this SC reoccurs, do the following: 1. Reconnect all the related connectors, and cycle the main power off/on to check if the SC reoccurs. 2. Replace the image creation temperature sensor, and cycle the main power off/on to check if the SC reoccurs.

• Code: 498-00
• Description: Temperature/humidity sensor error • The thermistor output of the temperature sensor is not within the prescribed range (more than 3.0V to less than 0.5V. • The thermistor output of the humidity sensor is not within the prescribed range (2.4V or more).
• Causes: • Damaged or loose connector • Defective temperature/humidity sensor
• Remedy: Cycle the main power off/on to check if this SC occurs again. If this SC reoccurs, do the following: 1. Reconnect all the related connectors, and cycle the main power off/on to check if the SC reoccurs. 2. Replace the temperature/humidity sensor, and cycle the main power off/on to check if the SC reoccurs.

• Code: 501-00
• Description: 1st paper tray lift motor malfunction This SC occurs if no paper is detected within the prescribed time when the tray is set correctly, and the tray lift motor starts rotating CW or CCW.
• Causes: • Incorrect/disconnected tray lift motor connector • Loose, disconnected or damaged tray lift sensor connector • An obstruction such as jammed paper scraps blocks the motor operation
• Remedy: 1. Replace the transport motor. 2. Reconnect the connector. 3. Replace the harness. 4. Replace the BiCU (IOB).

• Code: 502-00
• Description: 2nd paper tray lift motor malfunction (optional paper feed unit). When the tray is lifted up, the tray lift motor error, or sensor error is detected.
• Causes: • Tray Lift Motor disconnection or loose harness • Tray Bottom Plate Pressure Sensor disconnection or loose harness • Tray Bottom Plate HP Sensor disconnection or loose harness • Other defective mechanical parts
• Remedy: Do the following steps. Cycle the power off/on after doing each step to check if the SC occurs. 1. Reconnect the connector of the Tray Bottom Plate HP Sensor. 2. Reconnect the connector of the Tray Bottom Plate Pressure Sensor. 3. Replace the Lift Lever Encoder, gear encoder for tray lift unit (‘rising unit’ in the parts catalog), and the tension spring for paper feed. 4. Replace the tray lift motor. 5. Replace the harness. 6. Replace the board in the tray.