• Code: SC557-00
• Description: Zero-crossing frequency exceeded
• Causes: The number of zero-crossing interrupts exceeds a certain value in 500 ms. The frequency of the commercial power supply line is unstable or noise occurs.
• Remedy: None

• Code: SC559-00
• Description: Fusing jam detected 3 times in succession
• Causes: Fusing jam is detected three times in succession. Paper is wrapped around the fusing roller.
• Remedy: Clear the SP: fusing SC.

• Code: SC641-00
• Description: • Communication error: Engine (Timeout error) • Communication error: Engine (Retry error)
• Causes: • There is no response from the engine even after the timeout period specified during the communication has elapsed. • The communication has failed when sending the normal mode (ESIF_LECI_NORMAL) command even after exceeding the maximum number of command transmission retry. • Controller board/software defective • The connection between the controller board and engine board is faulty. • Engine board/software defective
• Remedy: • Check the connection between the controller board and engine board. • Turn the main power off/on.

• Code: SC653-00
• Description: Incorrect remote service ID2
• Causes: If the serial number*1 for producing ID2*2 has any of the following problems: • Blank • Contains control characters • Cannot be read *1: The serial number refers to "Machine Serial Set" (SP5-811-001). *2: ID2 refers to "Machine No. Setting" (SP5-811-003). • The serial number was not specified at the factory. • The NV memory is corrupted and cannot be read. • The NV memory has been corrupted while writing data into it.
• Remedy: • Turn the main power off/on. If the problem persists, the hardware is faulty.

• Code: SC669-01 ... SC669-26
• Description: EEPROM communication error
• Causes: An error is notified during EEPROM communication and the printer does not recover after three retries. 669 - 1 ID error during EEPROM OPEN 669 - 2 Channel error during EEPROM OPEN 669 - 3 Device error during EEPROM OPEN 669 - 4 Communication interrupted error during EEPROM OPEN 669 - 5 Communication timeout error 669 - 6 Not operating error during EEPROM OPEN 669 - 7 Buffer full during EEPROM OPEN 669 - 8 No error code during EEPROM OPEN 669 - 9 ID error 669 - 10 No error code during EEPROM Close 669 - 11 ID error during EEPROM data write 669 - 12 Channel error during EEPROM data write 669 - 13 Device error during EEPROM data write 669 - 14 Communication interrupted error during EEPROM data write 669 - 15 Communication timeout error 669 - 16 Not operating error during EEPROM data write 669 - 17 Buffer full during EEPROM data write 669 - 18 No error code during EEPROM data write 669 - 19 ID error during EEPROM data read 669 - 20 Channel error EEPROM data read 669 - 21 Device error during EEPROM data read 669 - 22 Communication interrupted error during EEPROM data read 669 - 23 Communication timeout error 669 - 24 Not operating error during EEPROM data rea• Electromagnetic noise • EEPROM errord 669 - 25 Buffer full during EEPROM data read 669 - 26 No error code during EEPROM data read • Electromagnetic noise • EEPROM error
• Remedy: • Turn the main power OFF and then ON. • Replace the BCU

• Code: SC669-36
• Description: EEPROM communication error
• Causes: The EEPROM data has been transferred to the SRAM twice in succession, but the two sets of transferred data do not match. 669 - 36 EEPROM SRAM OPEN: Verified error • Electromagnetic noise • EEPROM error
• Remedy: • Turn the main power OFF and then ON.

• Code: SC670-00
• Description: Engine start up error
• Causes: • The /ENGRDY signal is not detected even after the specified time has elapsed after turning the main power on or restoring from energy saver mode. • The /ENGRDY signal is detected, but it is negated at an unexpected occasion*. * Expected negation occurs when turning the power off, switching to the energy saver mode (after the engine automatically goes off), and rebooting the machine. • The engine board does not start up. • The connection between the controller board and engine board is faulty.
• Remedy: Check the connection between the engine board and the controller board. • If this problem always occurs, replace the engine board. If the problem persists, consider replacing the controller board or other boards between them. • If this problem occasionally occurs, multiple causes are to be considered, such as the software, engine board, controller board, and PSU.

• Code: SC681
• Description: Device ID is not identified (toner cartridge)
• Causes: An error is notified during the ID identification after three retries. 681 - 1 Device ID error (Incorrect ID) 681 - 6 Channel error 681 - 11 Device ID error (No ID chip) 681 - 16 Communication Error 681 - 21 Communication timeout 681 - 26 The device has stopped its operation 681 - 31 The requested buffer is full 681 - 36 EEPROM SRAM OPEN: Verification error
• Remedy: • Turn the main power OFF and then ON. • Replace the toner cartridge (ID chip)