• Code: SC393-00
• Description: Yellow drum drive FF control error. Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: 0x58_0x01
• Causes: • Yellow drum motor defective • Yellow sensor connector disconnected or harness broken • Yellow drum encoder sensor defective • Yellow drum encoder smudged or defective
• Remedy: • Replace the yellow drum encoder sensor. • Replace the yellow drum encoder. • Replace the yellow drum drive unit. • Replace the yellow drum motor. • Reconnect the connector or replace the harness.

• Code: SC395
• Description: Drum motor (K) Lock. Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: Motor lock detection setting value (engine to TDCU): 0x5B See table below for ASAP commands notifying SC detection. Details: TDCU Motor lock signal criteria: • Drum motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. • ITB drive motor, PTR Motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. Target value: If the default motor speed was adjusted using the SP, the adjusted value is used as the target value. Specification: • When the motor is on, each lock signal is checked every 100 milliseconds. If the High status is detected 20 times consecutively, the machine determines that the motor is not running correctly. The machine issues an SC and stops the motor.
• Causes: • Motor defective, connector disconnected, harness broken, IOB defective, unit torque increased. • Black drum sensor smudged, black drum sensor defective, black drum sensor connector not set correctly, harness broken
• Remedy: • Replace the motor / reconnect the connector / replace the harness / replace the IOB / replace the unit / replace the driven unit. • Clean the sensor / replace the sensor. • Reconnect the sensor connector. • Check the sensor harness.

• Code: SC396
• Description: Drum motor (C) Lock. Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: Motor lock detection setting value (engine to TDCU): 0x5B See table below for ASAP commands notifying SC detection. Details: TDCU Motor lock signal criteria: • Drum motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. • ITB drive motor, PTR Motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. Target value: If the default motor speed was adjusted using the SP, the adjusted value is used as the target value. Specification: • When the motor is on, each lock signal is checked every 100 milliseconds. If the High status is detected 20 times consecutively, the machine determines that the motor is not running correctly. The machine issues an SC and stops the motor.
• Causes: • Motor defective, connector disconnected, harness broken, IOB defective, unit torque increased. • Black drum sensor smudged, black drum sensor defective, black drum sensor connector not set correctly, harness broken
• Remedy: • Replace the motor / reconnect the connector / replace the harness / replace the IOB / replace the unit / replace the driven unit. • Clean the sensor / replace the sensor. • Reconnect the sensor connector. • Check the sensor harness.

• Code: SC397
• Description: Drum motor (M) Lock. Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: Motor lock detection setting value (engine to TDCU): 0x5B See table below for ASAP commands notifying SC detection. Details: TDCU Motor lock signal criteria: • Drum motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. • ITB drive motor, PTR Motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. Target value: If the default motor speed was adjusted using the SP, the adjusted value is used as the target value. Specification: • When the motor is on, each lock signal is checked every 100 milliseconds. If the High status is detected 20 times consecutively, the machine determines that the motor is not running correctly. The machine issues an SC and stops the motor.
• Causes: • Motor defective, connector disconnected, harness broken, IOB defective, unit torque increased. • Black drum sensor smudged, black drum sensor defective, black drum sensor connector not set correctly, harness broken
• Remedy: • Replace the motor / reconnect the connector / replace the harness / replace the IOB / replace the unit / replace the driven unit. • Clean the sensor / replace the sensor. • Reconnect the sensor connector. • Check the sensor harness.

• Code: SC398
• Description: Drum motor (Y) Lock. Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: Motor lock detection setting value (engine to TDCU): 0x5B See table below for ASAP commands notifying SC detection. Details: TDCU Motor lock signal criteria: • Drum motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. • ITB drive motor, PTR Motor High if the motor speed is not within the range of target value ± 6.25%. Low if the motor speed is within the range of target value ± 6.25%. Target value: If the default motor speed was adjusted using the SP, the adjusted value is used as the target value. Specification: • When the motor is on, each lock signal is checked every 100 milliseconds. If the High status is detected 20 times consecutively, the machine determines that the motor is not running correctly. The machine issues an SC and stops the motor.
• Causes: • Motor defective, connector disconnected, harness broken, IOB defective, unit torque increased. • Black drum sensor smudged, black drum sensor defective, black drum sensor connector not set correctly, harness broken
• Remedy: • Replace the motor / reconnect the connector / replace the harness / replace the IOB / replace the unit / replace the driven unit. • Clean the sensor / replace the sensor. • Reconnect the sensor connector. • Check the sensor harness.

• Code: SC400-01
• Description: Development Gamma High Error (K). Development gamma > 3.0 Details: This SC is issued when the development gamma measured during process control was greater than 3.0
• Causes: • Toner density too high • Condensation
• Remedy: • Replace the developer. • If condensation has formed, wait a while and repeat process control.

• Code: SC400-02
• Description: Development Gamma High Error (C). Development gamma > 3.0 Details: This SC is issued when the development gamma measured during process control was greater than 3.0
• Causes: • Toner density too high • Condensation
• Remedy: • Replace the developer. • If condensation has formed, wait a while and repeat process control.

• Code: SC400-03
• Description: Development Gamma High Error (M). Development gamma > 3.0 Details: This SC is issued when the development gamma measured during process control was greater than 3.0
• Causes: • Toner density too high • Condensation
• Remedy: • Replace the developer. • If condensation has formed, wait a while and repeat process control.