• Code: 027-0400-05
• Description: Error in supply with K Developing Assembly
• Causes: The Toner Supply Screw Rotation Sensor detected rotation error within the specified period of time.
• Remedy: [Related parts] R1.01 - Harness between the Feed/Drum Driver PCB (UN2/J225) and the Developing Motor (Bk) (M8/ J6011) - Harness between the Feed/Drum Driver PCB (UN2/J212) and the Toner Sensor Relay PCB (Bk) (UN42/J1430) - Developing Motor (Bk) (M8) - Developing Assembly (Bk) - Main Drive Assembly - Set-on Hopper Assembly - Feed/Drum Driver PCB (UN2) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Check that the Developing Coupling of the Developing Assembly is not damaged. 2. Check that the Developing Coupling of the Main Drive Assembly is not damaged. 3. Check/replace the related harness/cable, connector and parts.

• Code: 029-1000-05
• Description: Patch Sensor error
• Causes: The Patch Sensor detected light intensity error of the LED for B&W printing at initialization of the Developing Assembly.
• Remedy: [Related parts] R1.00 - Harness between the DC Controller PCB (UN1/J125) and the Patch Sensor (UN49/J1253) - Harness between the Front Driver PCB (UN3/J305) and the Registration Shutter Solenoid (SL1/ J6064) - Patch Sensor (UN49) - Registration Shutter Solenoid (SL1) - DC Controller PCB (UN1) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Remove soiling on the Patch Sensor. 2. Check the operation of the Registration Shutter Solenoid. 3. 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: 029-1001-05
• Description: Patch Sensor error
• Causes: The Patch Sensor detected light intensity error of the LED for color printing at initialization of the Developing Assembly.
• Remedy: [Related parts] R1.00 - Harness between the DC Controller PCB (UN1/J125) and the Patch Sensor (UN49/J1253) - Harness between the Front Driver PCB (UN3/J305) and the Registration Shutter Solenoid (SL1/ J6064) - Patch Sensor (UN49) - Registration Shutter Solenoid (SL1) - DC Controller PCB (UN1) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Remove soiling on the Patch Sensor. 2. Check the operation of the Registration Shutter Solenoid. 3. 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: 029-6001-05
• Description: Registration Shutter Solenoid error
• Causes: Light intensity lower limit error was detected during light intensity correction of the regular reflection LED.
• Remedy: [Related parts] R1.00 - Harness between the DC Controller PCB (UN1/J125) and the Patch Sensor (UN49/J1253) - Harness between the Front Driver PCB (UN3/J305) and the Registration Shutter Solenoid (SL1/ J6064) - Patch Sensor (UN49) - Registration Shutter Solenoid (SL1) - 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: 074-0001-05
• Description: ITB HP time out error
• Causes: The Primary Transfer Detachment Sensor 2 detected home position error during disengagement operation of the ITB.
• Remedy: [Related parts] R1.00 - Harnesses connecting the Front Driver PCB (UN3/J303), the ITB Displacement Sensor PCB (UN60/J700 and J701) and the Primary Transfer Detachment Sensor 2 (PS23/J7011) - Harness between the Front Driver PCB (UN3/J303) and the Primary Transfer Roller Disengagement Motor (M15/J3032) - Primary Transfer Detachment Sensor 2 (PS23) - Primary Transfer Roller Disengagement Motor (M15) - ITB Displacement Sensor PCB (UN60) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 074-0002-05
• Description: ITB HP time out error
• Causes: The Primary Transfer Detachment Sensor 1 detected home position error during engagement operation of the ITB.
• Remedy: [Related parts] R1.01 - Harnesses connecting the Front Driver PCB (UN3/J303), the ITB Displacement Sensor PCB (UN60/J700 and J701) and the Primary Transfer Detachment Sensor 1 (PS22/J7010) - Harness between the Front Driver PCB (UN3/J303) and the Primary Transfer Roller Disengagement Motor (M15/J3032) - Harness between the Front Driver PCB (UN3/J304) and the Relay PCB (UN5/J402) - Primary Transfer Detachment Sensor 1 (PS22) - Primary Transfer Roller Disengagement Motor (M15) - ITB Displacement Sensor PCB (UN60) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 074-0003-05
• Description: Primary Transfer Detachment Sensor error
• Causes: Both the Primary Transfer Detachment Sensor 1 and 2 detected home position at the same time during engagement/disengagement operation of the ITB.
• Remedy: [Related parts] R1.00 - Harnesses connecting the Front Driver PCB (UN3/J303), the ITB Displacement Sensor PCB (UN60/J700 and J701) and the Primary Transfer Detachment Sensor 1 and 2 (PS22/J7010 and PS23/J7011) - Primary Transfer Detachment Sensor 1 (PS22) - Primary Transfer Detachment Sensor 2 (PS23) - ITB Displacement Sensor PCB (UN60) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 075-0002-05
• Description: ITB displacement control error
• Causes: The ITB Steering Sensor did not detect change in home position signal.
• 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) - Intermediate Transfer Belt Assembly - Front Driver PCB (UN3) [Remedy] Check/replace the related harness/cable, connector and parts.