• Code: F2-84
• Description: Half tone process control 2nd 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: F2-85
• Description: Half tone process control 2nd 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: F2-86
• Description: Half tone process control 2nd 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: F2-87
• Description: Half tone process control 2nd 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.

• Code: F2-92
• Description: High-density process control density correction error (C)
• Causes: Image density sensor trouble, harness connection trouble between PCU PWB and image density sensor, dirt on image density sensor, transfer belt cleaning trouble
• Remedy: 1) Use SIM44-2 to execute the process control sensor gain adjustment. 2) If an error occurs, check the sensors and the harnesses. 3) If the adjustment of 1) is completed, check the drum surface state, the belt surface state, etc.

• Code: F2-93
• Description: High-density process control density correction error (M)
• Causes: Image density sensor trouble, harness connection trouble between PCU PWB and image density sensor, dirt on image density sensor, transfer belt cleaning trouble
• Remedy: 1) Use SIM44-2 to execute the process control sensor gain adjustment. 2) If an error occurs, check the sensors and the harnesses. 3) If the adjustment of 1) is completed, check the drum surface state, the belt surface state, etc.

• Code: F2-94
• Description: High-density process control density correction error (Y)
• Causes: Image density sensor trouble, harness connection trouble between PCU PWB and image density sensor, dirt on image density sensor, transfer belt cleaning trouble
• Remedy: 1) Use SIM44-2 to execute the process control sensor gain adjustment. 2) If an error occurs, check the sensors and the harnesses. 3) If the adjustment of 1) is completed, check the drum surface state, the belt surface state, etc.

• Code: F3-12
• Description: Tray 1 lift-up trouble
• Causes: T1LUD does not turn ON within the specified time.
• Remedy: Case 1 Cause T1LUD sensor trouble. Harness connection trouble between PCU PWB, the lift-up unit, and the paper feed unit. Check and remedy Check the harness and the connector of T1LUD. Case 2 Cause Tray 1 lift-up motor trouble Check and remedy Check the lift-up unit.