• Code: 075-0003-05
• Description: ITB displacement control error
• Causes: The ITB Steering Sensor detected that the ITB was at full displacement position at the rear.
• Remedy: [Related parts] R1.00 - Harnesses connecting the Front Driver PCB (UN3/J303), the ITB Displacement Sensor PCB (UN60/J700 and J701) and the ITB Steering Sensor (PS24/J7013) - Harness between the Front Driver PCB (UN3/J303) and the ITB Displacement Control Motor (M14/J3031) - ITB Steering Sensor (PS24) - ITB Displacement Control Motor (M14) - ITB Displacement Sensor PCB (UN60) - Secondary Transfer Inner Roller - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Perform the following in the order while checking whether the error is cleared. a. If the ITB is not at full displacement position, 1. Check/replace the related harness/cable, connector and parts. b. If the ITB is at full displacement position, 1. Correct displacement of the ITB. 1-1. Remove the Intermediate Transfer Belt Assembly. 1-2. Lift the left front side (where the cleaner and the ITB Motor are located) and hold the Intermediate Transfer Belt Assembly as if to twist it. 1-3. Turn the ITB Motor counterclockwise to rotate the ITB. 1-4. As the ITB is getting closer to the center, adjust the ITB position. 2. Check/replace the Secondary Transfer Inner Roller. 3. Execute COPIER> FUNCTION> MISC-P> ITB-INIT. 4. If the value displayed in COPIER> DISPLAY> MISC> ITB-POS/ITB-POS2 is out of the appropriate reference value range, execute the ITB alignment. 5. Check/replace the related harness/cable, connector and parts.

• Code: 075-0004-05
• Description: ITB displacement control error
• Causes: ITB displacement position could not be detected due to error in the Displacement Control Sensor.
• Remedy: [Related parts] R1.00 - Harness between the Front Driver PCB (UN3/J303) and the ITB Displacement Sensor PCB (UN60/J700) - ITB Displacement Sensor PCB (UN60) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 075-0005-05
• Description: ITB displacement control error
• Causes: The ITB Steering Sensor detected home position error.
• Remedy: [Related parts] R1.00 - Harnesses connecting the Front Driver PCB (UN3/J303), the ITB Displacement Sensor PCB (UN60/J700 and J701) and the ITB Steering Sensor (PS24/J7013) - ITB Steering Sensor (PS24) - ITB Displacement Sensor PCB (UN60) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 075-0006-05
• Description: ITB displacement control error
• Causes: The Displacement Control Sensor did not detect equilibrium position although a specified period of time had passed.
• Remedy: [Related parts] R1.00 - Harness between the Front Driver PCB (UN3/J303) and the ITB Displacement Sensor PCB (UN60/J700) - Harness between the Front Driver PCB (UN3/J303) and the ITB Displacement Control Motor (M14/J3031) - ITB Displacement Control Motor (M14) - ITB Displacement Sensor PCB (UN60) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 075-0103-05
• Description: ITB displacement control error
• Causes: The ITB Steering Sensor detected that the ITB was at full displacement position at the front.
• Remedy: [Related parts] R1.00 - Harnesses connecting the Front Driver PCB (UN3/J303), the ITB Displacement Sensor PCB (UN60/J700 and J701) and the ITB Steering Sensor (PS24/J7013) - Harness between the Front Driver PCB (UN3/J303) and the ITB Displacement Control Motor (M14/J3031) - ITB Steering Sensor (PS24) - ITB Displacement Control Motor (M14) - ITB Displacement Sensor PCB (UN60) - Secondary Transfer Inner Roller - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Perform the following in the order while checking whether the error is cleared. a. If the ITB is not at full displacement position, 1. Check/replace the related harness/cable, connector and parts. b. If the ITB is at full displacement position, 1. Correct displacement of the ITB. 1-1. Remove the Intermediate Transfer Belt Assembly. 1-2. Lift the left rear side (opposite side of where the cleaner and the ITB Motor are located) and hold the Intermediate Transfer Belt Assembly as if to twist it. 1-3. Turn the ITB Motor counterclockwise to rotate the ITB. 1-4. As the ITB is getting closer to the center, adjust the ITB position. 2. Check/replace the Secondary Transfer Inner Roller. 3. Execute COPIER> FUNCTION> MISC-P> ITB-INIT. 4. If the value displayed in COPIER> DISPLAY> MISC> ITB-POS/ITB-POS2 is out of the appropriate reference value range, execute the ITB alignment. 5. Check/replace the related harness/cable, connector and parts.

• Code: 100-0100-05
• Description: Laser Scanner error
• Causes: BD signal was not detected although a specified period of time had passed during operation of the Laser Scanner (Y, M).
• Remedy: [Related parts] R1.01 - Small-diameter Coaxial Cable connecting from the Riser PCB (J9) to the Laser Driver PCB (Y) and (M) (UN13/J101 and UN12/J822) - Connector between the Main Controller PCB and the Riser PCB - Harness between the DC Controller PCB (UN1/J171) and the Laser Driver PCB (Y) (UN13/J851) - Harness between the Relay PCB (UN5/J416) and the Laser Driver PCB (M) (UN12/J830) - Laser Driver PCB (Y) (UN13) - Laser Driver PCB (M) (UN12) - Main Controller PCB - Riser PCB - DC Controller PCB (UN1) [Remedy] Check/replace the related harness/cable, connector and parts. [Reference] Before replacing the DC Controller PCB, back up the service mode data (approx. 2 min) and restore the backup data after the replacement so the data may be able to be protected. - Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMBUP - Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES

• Code: 100-0102-05
• Description: Laser Scanner error
• Causes: Correction in timing of laser exposure to the Polygon Mirror (Y, M) was not completed within the specified period of time.
• Remedy: [Related parts] R1.00 - Small-diameter Coaxial Cable connecting from the Riser PCB (J9) to the Laser Driver PCB (Y) and (M) (UN13/J101 and UN12/J822) - Connector between the Main Controller PCB and the Riser PCB - Harness between the DC Controller PCB (UN1/J171) and the Laser Driver PCB (Y) (UN13/J851) - Laser Driver PCB (Y) (UN13) - Laser Driver PCB (M) (UN12) - Main Controller PCB - Riser PCB - DC Controller PCB (UN1) [Remedy] Check/replace the related harness/cable, connector and parts. [Reference] Before replacing the DC Controller PCB, back up the service mode data (approx. 2 min) and restore the backup data after the replacement so the data may be able to be protected. - Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMBUP - Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES

• Code: 100-0300-05
• Description: Laser Scanner error
• Causes: BD signal was not detected although a specified period of time had passed during operation of the Laser Scanner (C, Bk).
• Remedy: [Related parts] R1.00 - Small-diameter Coaxial Cable connecting from the Riser PCB (J9) to the Laser Driver PCB (C) and (Bk) (UN15/J802 and UN14/J822) - Connector between the Main Controller PCB and the Riser PCB - Harness between the DC Controller PCB (UN1/J171) and the Laser Driver PCB (C) (UN15/J862) - Laser Driver PCB (C) (UN15) - Laser Driver PCB (Bk) (UN14) - Main Controller PCB - Riser PCB - DC Controller PCB (UN1) [Remedy] Check/replace the related harness/cable, connector and parts. [Reference] Before replacing the DC Controller PCB, back up the service mode data (approx. 2 min) and restore the backup data after the replacement so the data may be able to be protected. - Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMBUP - Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES