• Code: SC503
• Description: 2nd tray lift motor abnormal - Definition - [C] The lift sensor is not activated within 10 seconds after the lift motor starts turning. The SC message for level C is displayed when this condition is detected twice.
• Causes: • Lift sensor defective • Tray lift motor defective or poor connection • Paper feed interface board defective or poor connection (CN906) • Main control board defective

• Code: SC504
• Description: 3rd tray lift motor abnormal - Definition - [C] The lift sensor is not activated within 10 seconds after the lift motor starts turning. The SC message for level C is displayed when this condition is detected twice.
• Causes: • Lift sensor defective • Tray lift motor defective or poor connection • Paper feed interface board defective or poor connection (CN906) • Main control board defective

• Code: SC510
• Description: Paper feed motor abnormal - Definition - [B] The paper feed motor lock signal is detected for more than 3 seconds.
• Causes: • Too much load on the paper feed mechanism • Paper feed motor defective or poor connection • Paper feed interface board defective or poor connection (CN910) • Main control board defective

• Code: SC541
• Description: Fusing (hot roller) thermistor open - Definition - [A] The output of the fusing (hot roller) thermistor goes to 5 V, corresponding to 0°C.
• Causes: • Fusing (hot roller) thermistor open • Fusing unit not installed • Main control board defective

• Code: SC542
• Description: Fusing (hot roller) warm-up error - Definition - [A] The fusing (hot roller) temperature does not reach the ready temperature within 12 minutes after the main switch is turned on.
• Causes: • Fusing (hot roller) thermistor not in position • Fusing (hot roller) lamp open • Fusing (hot roller) thermistor defective • Main control board defective

• Code: SC543
• Description: Fusing (hot roller) overheat - Definition - [A] A fusing (hot roller) temperature of over 200°C is detected 5 times (within 5 seconds).
• Causes: • Fusing (hot roller) thermistor defective • AC drive board defective (triac) • Main control board defective

• Code: SC544
• Description: Fusing (hot roller) low temperature abnormal - Definition - [A] A fusing (hot roller) temperature of below 90°C is detected 6 times (within 6 seconds) after warm-up is completed.
• Causes: • Fusing (hot roller) thermistor defective • AC drive board defective • Main control board defective • Fusing (hot roller) thermistor not in position • Fusing (hot roller) lamp open

• Code: SC545
• Description: Fusing (hot roller) ready temperature abnormal - Definition - [A] Fusing (hot roller) temperature goes below the ready temperature (10°C below the control temperature) after warm-up is completed, and it does not reach the ready temperature within 6 minutes.
• Causes: • Fusing (hot roller) thermistor defective • AC drive board defective • Main control board defective