• Code: SC445-02
• Description: ITB unit control error: driven shaft eccentricity correction control Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: 0x58_0x20
• Causes: • ITB motor defective • ITB unit set error • Connector disconnected or harness broken • Driven shaft encoder sensor defective • Driven shaft encoder smudged or damaged • Drive shaft encoder sensor defective • Drive shaft encoder smudged or damaged
• Remedy: • Replace the ITB unit. • Replace the ITB motor. • Set the ITB unit again. • Replace the driven shaft encoder sensor. • Replace the driven shaft encoder. • Replace the drive shaft encoder sensor. • Replace the drive shaft encoder. • Reconnect the connectors or replace the harness. • Replace the ITB.

• Code: SC445-03
• Description: ITB unit control error: dancing control. Error detected by the TDCU. If a command sent from the TDCU indicates an error, the engine issues an SC. ASAP command: 0x58_0x10
• Causes: • ITB motor defective • ITB unit set error • Connector disconnected or harness broken • Driven shaft encoder sensor defective • Driven shaft encoder smudged or damaged • Drive shaft encoder sensor defective • Drive shaft encoder smudged or damaged
• Remedy: • Replace the ITB unit. • Replace the ITB motor. • Set the ITB unit again. • Replace the driven shaft encoder sensor. • Replace the driven shaft encoder. • Replace the drive shaft encoder sensor. • Replace the drive shaft encoder. • Reconnect the connectors or replace the harness. • Replace the ITB.

• Code: SC446
• Description: SC446-01 D ITB: Lock: Encoder 1 error SC446-02 D ITB: Lock: Encoder 2 error SC446-03 D ITB: Lock: Encoder 1/2 error SC446-04 D ITB: Lock: Hole error SC446-05 D ITB: Lock: Overload error. 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. • ITB drive R sensor smudged, ITB driven R sensor smudged, ITB drive R sensor defective, ITB drive R sensor defective • ITB drive R sensor connector not set correctly, ITB driven R 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: SC450-01
• Description: ITB Power Pack error (leak): DC. An interrupt checks the status of the power pack every 10 ms. This SC is issued if a problem exists with 50 consecutive samplings (500 ms). Details: SC issued when the ITB power pack output current is leaking. The IOB checks for SC signals as described above. Distinguished between DC and AC.
• Causes: • ITB power pack output current is leaking.
• Remedy: Remove the high voltage cable from the output terminal of the ITB power pack and check the following items. • PWM signal check If signal is fixed during image transfer, replace the cable or the IOB. • ITB power pack output check If output is fixed during image transfer, replace the power pack. If output is normal during image transfer, replace the high voltage cable, ITB or the transfer roller.

• Code: SC450-02
• Description: ITB Power Pack error (leak): AC. An interrupt checks the status of the power pack every 10 ms. This SC is issued if a problem exists with 50 consecutive samplings (500 ms). Details: SC issued when the ITB power pack output current is leaking. The IOB checks for SC signals as described above. Distinguished between DC and AC.
• Causes: • ITB power pack output current is leaking.
• Remedy: Remove the high voltage cable from the output terminal of the ITB power pack and check the following items. • PWM signal check If signal is fixed during image transfer, replace the cable or the IOB. • ITB power pack output check If output is fixed during image transfer, replace the power pack. If output is normal during image transfer, replace the high voltage cable, ITB or the transfer roller.

• Code: SC450-11
• Description: ITB Power Pack Error (low output) The ITB roller resistance level was "R-3" (detected voltage was lower than 0.1kV).
• Causes: • ITB power pack defective • Problem with input harness to the ITB power pack (loose connection, harness broken, or connector disconnected).
• Remedy: • Fix or replace the ITB power pack. • Check the input harness and connector of the ITB power pack.

• Code: SC452-00
• Description: PTR Lift Error. Even though the PTR lift motor rotates, the PTR lift sensor failed to detect the specified sensor feeler status within specified time. Details: • During home-positioning (operation for fixing the separated status) (separation movement) The sensor failed to detect the transition from “feeler present” to “feeler absent” (separation) within 2000 msec from the start of PTR lift motor rotation. • During normal contact/separation movement (printing/process control/MUSIC/forced toner consumption) Contact movement: The sensor failed to detect the transition from “feeler absent” to “feeler present” (contact) within 2000 msec from the start of PTR lift motor rotation. Separation movement: The sensor failed to detect the transition from “feeler present” to “feeler absent” (separation) within 2000 msec from the start of PTR lift motor rotation. • During contact/separation movement under special conditions (paper jam, paper end etc.) Separation movement: The sensor failed to detect the transition from “feeler present” to “feeler absent” (separation) within 2000 msec from the start of PTR lift motor rotation. Detection timing: During contact/separation movement Detection interval: 2msec or less
• Causes: • Sensor smudged • Motor/sensor defective • Harness broken or problem with connection (such as a disconnected connector)
• Remedy: • If smudged: cleaning • If defective or broken: replacement • Problem with connection: reconnection

• Code: SC453-00
• Description: Paper Transfer Roller end-of-life The paper transfer roller resistance level was "R+3".
• Causes: • Paper transfer roller resistance increased through time (Roller endof- life) • Connection fault between the paper transfer power pack and the paper transfer roller (High voltage harness broken, connector disconnected, or contact failure of paper transfer roller bushes, etc.) • Paper transfer power pack defective
• Remedy: • Replace the paper transfer roller. • Reconnect or replace the high voltage harness or the unit. • Fix or replace the paper transfer power pack.