Code :

Code: E748 2010
Description: Flash PCB error / HDD error. IPL (startup program) was not found, or the HDD could not be recognized.
Remedy: • Cable between the Main Controller PCB (UN05/J29 and J23) and the HDD (Unit of replacement: CABLE, SATA POWER, CABLE, SATA SIGNAL) • Flash PCB (UN61) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Disconnect the cable between the Main Controller PCB and the HDD, and turn ON the main power. a. When the error code has not been changed: 1. Obtain the necessary backup data by referring to the backup data list. 2. Enter safe mode using (2+8) startup, and execute [4] Clear/ Format> [2] Flash Format (Flash format) using a USB memory. 3. After replacing the Flash PCB, reinstall the system software using SST or a USB memory. 4. Restore the backup data. b. When the error code has been changed to another one, see the remedy for the corresponding code. [Reference] For backup and restoration, refer to "Adjustment> Actions after Replacement" and "Appendix> Backup Data List" in the Service Manual

Code: E749 0005
Description: Error due to change in hardware configuration. There was a change in option configuration that requires turning OFF and then ON the main power. On the screen, only the message "Turn the main power switch OFF and ON" is displayed instead of displaying the error code. The error log is not recorded in COPIER> DISPLAY> ERR
Remedy: Turn OFF and then ON the main power. [Reference] Options are recognized again by turning OFF and then ON the main power.

Code: E749 0006
Description: Error due to change in hardware configuration. There was a change in option configuration during quick off. On the screen, only the message "Turn the main power switch OFF and ON" is displayed instead of displaying the error code. The error log is not recorded in COPIER> DISPLAY> ERR
Remedy: Turn OFF and then ON the main power. [Reference] Options are recognized 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: 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 (UN61), 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 (FM02/J1008) (Unit of replacement: POWER SUPPLY ASSEMBLY) • Power Supply Cooling Fan (FM02) (Unit of replacement: FAN) • Low Voltage Power Supply PCB (UN01) (Unit of replacement: POWER SUPPLY ASSEMBLY) [Remedy] Check/replace the related harness/cable, connector and parts.

Code: E806 0100
Description: Front Fan error. Unlocked state was detected 2 consecutive times in 3 sec when the Front Fan was driven.
Remedy: [Related parts] • Harnesses from the DC Controller PCB to the Front Fan 1. DC Controller PCB (UN04/J133) to Relay Connector (9P) (Unit of replacement: CABLE, SENSOR) 2. Relay Connector (9P) to Front Fan (FM01/J1260) (Unit of replacement: CABLE, INTERLOCK SWITCH) • DC Controller PCB (UN04/J133) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) • Front Fan (FM01) (Unit of replacement: FAN, FRONT) [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: E806 0101
Description: Front Fan error. A state of caught cable was detected within 15 sec when the Front Fan was driven.
Remedy: [Related parts] • Harnesses from the DC Controller PCB to the Front Fan 1. DC Controller PCB (UN04/J133) to Relay Connector (9P) (Unit of replacement: CABLE, SENSOR) 2. Relay Connector (9P) to Front Fan (FM01/J1260) (Unit of replacement: CABLE, INTERLOCK SWITCH) • DC Controller PCB (UN04/J133) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) • Front Fan (FM01) (Unit of replacement: FAN, FRONT) [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