• Code: E749-0006
• Description: Error due to change in hardware configuration
  There was a change in option configuration during quick off.
• Remedy: [Remedy] Turn OFF and then ON the main power. [Reference] It is configured to recognize the options again by turning OFF and then ON the main power.

• Code: E753-0001
• Description: Download error
  Update of the Main Controller PCB ended in failure. (Power supply was interrupted during update without backup.)
• Remedy: [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Reinstall the system software using SST or a USB memory. 2. After replacing the Flash PCB (UN96), reinstall the system software using SST or a USB memory. 3. Collect debug log and contact to the sales company.

• Code: E804-0000
• Description: Power Supply Cooling Fan error
  It was detected that the Power Supply Cooling Fan was locked.
• Remedy: [Related parts] - Harness between the Low-voltage Power Supply PCB (UN01/ J323) and the Power Supply Cooling Fan (FM05/J5215) (Unit of replacement: CABLE, POWER SUPPLY) - Harness between the Low-voltage Power Supply PCB (UN01/ J321) and the Main Controller PCB (UN81/J7010) (Unit of replacement: CABLE, POWER SUPPLY) - Power Supply Cooling Fan (FM05) - Low-voltage Power Supply PCB (UN01) (Unit of replacement: POWER SUPPLY ASSEMBLY) - Main Controller PCB (UN81) (Unit of replacement: MAIN CONTROLLER PCB ASSEMBLY) [Points to note at work] When checking the harness/cable or connector, perform the following work. 1. Disconnect and then connect the connector to check that there is no bent pin and cable disconnection. 2. Visually check that the harness is not caught or open circuit. 3. If there is any error, replace the corresponding harness/cable. [Remedy] Check/replace the related parts.

• Code: E806-0100
• Description: Drum Unit Suction Cooling Fan error
  The Drum Unit Suction Cooling Fan did not rotate for the specified period of time since the start of drive.
• Remedy: [Related parts] - Harness between the DC Controller PCB (UN04/J180) and the Primary Transfer High-voltage PCB (UN03/J271) (Unit of replacement: CABLE, PRIMARY TRANSFER H.V.) - Harness between the Primary Transfer High-voltage PCB (UN03/J272) and the Drum Unit Suction Cooling Fan (FM01) - Drum Unit Suction Cooling Fan (FM01) - Primary Transfer High-voltage PCB (UN03) (Unit of replacement: 1ST TRANSFER H.V. PCB ASSEMBLY) - DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Points to note at work] When checking the harness/cable or connector, perform the following work. 1. Disconnect and then connect the connector to check that there is no bent pin and cable disconnection. 2. Visually check that the harness is not caught or open circuit. 3. If there is any error, replace the corresponding harness/cable. [Remedy] Check/replace the related 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: E806-0101
• Description: Drum Unit Suction Cooling Fan error
  The Drum Unit Suction Cooling Fan rotated for more than the specified period of time after the stop of drive.
• Remedy: [Related parts] - Harness between the DC Controller PCB (UN04/J180) and the Primary Transfer High-voltage PCB (UN03/J271) (Unit of replacement: CABLE, PRIMARY TRANSFER H.V.) - Harness between the Primary Transfer High-voltage PCB (UN03/J272) and the Drum Unit Suction Cooling Fan (FM01) - Drum Unit Suction Cooling Fan (FM01) - Primary Transfer High-voltage PCB (UN03) (Unit of replacement: 1ST TRANSFER H.V. PCB ASSEMBLY) - DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Points to note at work] When checking the harness/cable or connector, perform the following work. 1. Disconnect and then connect the connector to check that there is no bent pin and cable disconnection. 2. Visually check that the harness is not caught or open circuit. 3. If there is any error, replace the corresponding harness/cable. [Remedy] Check/replace the related 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: E806-0300
• Description: Delivery Cooling Fan error
  The Delivery Cooling Fan did not rotate for the specified period of time since the start of drive.
• Remedy: [Related parts] - Harnesses from the DC Controller PCB to the Delivery Cooling Fan 1. DC Controller PCB (UN04/J151) to Relay Connector (3P) (Unit of replacement: CABLE, MAIN) 2. Relay Connector (3P) to Delivery Cooling Fan (FM03) - Delivery Cooling Fan (FM03) - DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Points to note at work] When checking the harness/cable or connector, perform the following work. 1. Disconnect and then connect the connector to check that there is no bent pin and cable disconnection. 2. Visually check that the harness is not caught or open circuit. 3. If there is any error, replace the corresponding harness/cable. [Remedy] Check/replace the related 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: E806-0301
• Description: Delivery Cooling Fan error
  The Delivery Cooling Fan rotated for more than the specified period of time after the stop of drive.
• Remedy: [Related parts] - Harnesses from the DC Controller PCB to the Delivery Cooling Fan 1. DC Controller PCB (UN04/J151) to Relay Connector (3P) (Unit of replacement: CABLE, MAIN) 2. Relay Connector (3P) to Delivery Cooling Fan (FM03) - Delivery Cooling Fan (FM03) - DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Points to note at work] When checking the harness/cable or connector, perform the following work. 1. Disconnect and then connect the connector to check that there is no bent pin and cable disconnection. 2. Visually check that the harness is not caught or open circuit. 3. If there is any error, replace the corresponding harness/cable. [Remedy] Check/replace the related 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: E806-0400
• Description: Duplex Cooling Fan error
  The Duplex Cooling Fan in the Right Cover did not rotate for the specified period of time since the start of drive.
• Remedy: [Related parts] - Harnesses from the DC Controller PCB to the Duplex Cooling Fan 1. DC Controller PCB (UN04/J122) to Relay Connector (17P) (Unit of replacement: 2ST TRANS. H.V. CONTACT ASS’Y) 2. Relay Connector (17P) to Relay Connector (3P) (Unit of replacement: CABLE, DOOR, RIGHT) 3. Relay Connector (3P) to Relay Connector (3P) (Unit of replacement: CABLE, DOOR FAN, RIGHT) 4. Relay Connector (3P) to Duplex Cooling Fan (FM04) - Duplex Cooling Fan (FM04) - DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Points to note at work] When checking the harness/cable or connector, perform the following work. 1. Disconnect and then connect the connector to check that there is no bent pin and cable disconnection. 2. Visually check that the harness is not caught or open circuit. 3. If there is any error, replace the corresponding harness/cable. [Remedy] Check/replace the related 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