Code :

Code: F2-75
Description: Toner cartridge CRUM error (C)
Causes: CRUM cannot be read or written.
Remedy: Case 1 Cause Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. Check and remedy Check the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedy Replace the toner cartridge. Case 3 Cause Control (PCU) PWB trouble Check and remedy Replace the PCU PWB.

Code: F2-76
Description: Toner cartridge CRUM error (M)
Causes: CRUM cannot be read or written.
Remedy: Case 1 Cause Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. Check and remedy Check the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedy Replace the toner cartridge. Case 3 Cause Control (PCU) PWB trouble Check and remedy Replace the PCU PWB.

Code: F2-77
Description: Toner cartridge CRUM error (Y)
Causes: CRUM cannot be read or written.
Remedy: Case 1 Cause Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. Check and remedy Check the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedy Replace the toner cartridge. Case 3 Cause Control (PCU) PWB trouble Check and remedy Replace the PCU PWB.

Code: F2-78
Description: Registration exclusive image density sensor trouble (Transfer belt surface reflection ratio abnormality)
Causes: Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble, calibration plate solenoid operation trouble
Remedy: Check the sensor and the harness. Check the calibration plate solenoid operation and the transfer belt surface state. If the trouble is not cleared, replace the image sensor exclusively used for registration, replace the transfer belt, replace the calibration plate solenoid, or replace the PCU PWB according to the check result.

Code: F2-80
Description: Half tone process control 1st patch reference value trouble (K)
Causes: Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble
Remedy: Use SIM44-2 to execute the process control sensor gain adjustment. If "ERROR" is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state.

Code: F2-81
Description: Half tone process control 1st patch reference value trouble (C)
Causes: Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble
Remedy: Use SIM44-2 to execute the process control sensor gain adjustment. If "ERROR" is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state.

Code: F2-82
Description: Half tone process control 1st patch reference value trouble (M)
Causes: Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble
Remedy: Use SIM44-2 to execute the process control sensor gain adjustment. If "ERROR" is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state.

Code: F2-83
Description: Half tone process control 1st patch reference value trouble (Y)
Causes: Image density sensor trouble, harness connection trouble between PCU sub PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble
Remedy: Use SIM44-2 to execute the process control sensor gain adjustment. If "ERROR" is displayed, check the sensor and the harness. If the adjustment is completed, check the drum surface state and the belt surface state.