Paper Feed and Fusing

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
508-00	B	By-pass bottom plate operation error
		The signal from the by-pass bottom plate position Sensor has not changed (that is, the signal has not changed from ON to OFF or vice versa) for two seconds or more after the start of reverse Paper Feed Unit rotation, If the error is detected three times in succession, the appropriate SC number is displayed on the operation panel unit.
		By-pass bottom plate Sensor connector disconnected or other error By-pass bottom plate Sensor feeler stuck or other error
		Turn the power OFF and then ON. Check and replace the by-pass bottom plate Sensor connector connection. Replace the by-pass bottom plate Sensor feeler. Replace the Paper Feed Motor.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
520-02	D	Fusing motor error
		Early Detection A command to stop the rotation of the motor has been issued right after the power was turned on, but the motor is still rotating. Motor Operation Timing When the motor rotation request or speed change request is issued, the motor is in the stopped state. Motor Stop Timing A command to stop the rotation of the motor has been issued, but the motor is still rotating.
		Disconnected connector Broken signal wire Excessive motor torque
		Check the connector connection. Turn the power OFF and then ON. Replace the Fusing Motor.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
521-01	B	Bank 1 motor error (Bank: paper tray unit)
		Early Detection A command to stop the rotation of the motor has been issued right after the power was turned on, but the motor is still rotating. Motor Stop Timing A command to stop the rotation of the motor has been issued, but the motor is still rotating.
		Disconnected connector Broken signal wire Excessive motor torque
		Check the connector connection. Turn the power OFF and then ON. Replace the bank 1 motor.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
521-02	B	Bank 2 motor error (Bank: paper tray unit)
		Early Detection A command to stop the rotation of the motor has been issued right after the power was turned on, but the motor is still rotating. Motor Stop Timing A command to stop the rotation of the motor has been issued, but the motor is still rotating.
		Disconnected connector Broken signal wire Excessive motor torque
		Check the connector connection. Turn the power OFF and then ON. Replace the bank 2 motor.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
521-03	B	Bank 3 motor error (Bank: paper tray unit)
		Early Detection A command to stop the rotation of the motor has been issued right after the power was turned on, but the motor is still rotating. Motor Stop Timing A command to stop the rotation of the motor has been issued, but the motor is still rotating.
		Disconnected connector Broken signal wire Excessive motor torque
		Check the connector connection. Turn the power OFF and then ON. Replace the bank 3 motor.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
530-00	D	Cooling fan error
		The fan motor lock (rotating state) signal is sampled 30 times at 100 ms intervals and the fan goes into an unstable rotating state at least ten times. (No error detection occurs for two seconds after the start of the fan or after changing the speed.)
		Failed fan motor Disconnected connector
		Replace the fan motor. Check the connector.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
531-00	D	Fusing fan error
		The fan motor lock (rotating state) signal is sampled 30 times at 100 ms intervals and the fan goes into an unstable rotating state at least ten times. (No error detection occurs for two seconds after the start of the fan or after changing the speed.)
		Failed fan motor Disconnected connector
		Replace the fan motor. Check the connector.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
532-00	D	PSU cooling fan
		The fan motor lock (rotating state) signal is sampled 30 times at 100 ms intervals and the fan goes into an unstable rotating state at least ten times. (No error detection occurs for two seconds after the start of the fan or after changing the speed.)
		Failed fan motor Disconnected connector
		Replace the fan motor. Check the connector.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
540-00	D	Paper Feed Unit error
		Early Detection A command to stop the rotation of the motor has been issued right after the power was turned on, but the motor is still rotating. Motor Operation Timing When the motor rotation request or speed change request is issued, the motor is in the stopped state. Motor Stop Timing A command to stop the rotation of the motor has been issued, but the motor is still rotating.
		Disconnected connector Broken signal wire Excessive motor torque
		Check the connector connection. Turn the power OFF and then ON. Replace the Paper Feed Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
541-00	A	Broken fusing (Center) thermopile wire
		AD value: 0-6 is detected for specified seconds continuously. Detection period: 500 ms, detection frequency: 10 times or more.
		Broken thermopile wire Bad connector contact
		Clear the SP: fusing SC. Replace the connector. Replace the thermopile.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
542-02	A	Fusing lamp (Center) thermopile not reloaded 1
		The heater(Center) thermopile does not reach 50 deg C 2.9 seconds after the start of heat control (during normal startup control).
		Stained thermopile lens Broken heater wire Input voltage out of range The overtemperature prevention mechanism started working
		Clean the thermopile lens. Replace the thermopile. Replace the Fusing Unit. Clear the SP: fusing SC.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
542-03	A	Fusing lamp (Center) thermopile not reloaded 2
		The heater (Center) thermistor does not reach the reload temperature 17 seconds after the start of motor rotation.
		Stained thermopile lens Broken heater wire Input voltage out of range The overtemperature prevention mechanism started working
		Clean the thermopile lens. Replace the thermopile. Replace the Fusing Unit. Clear the SP: fusing SC.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
542-04	A	Fusing lamp (Center) thermopile not reloaded 3
		The heater (Center) thermistor does not reach 100 deg C 7.7 seconds after the start of heat control (during low-temperature start up control).
		Stained thermopile lens Broken heater wire Input voltage out of range The overtemperature prevention mechanism started working
		Clean the thermopile lens. Replace the thermopile. Replace the Fusing Unit. Clear the SP: fusing SC.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
543-00	A	Fusing (Center) thermopile high-temperature detected (software)
		The temperature is detected to stay at 230 deg C or higher for one second.
		Shorted triac (element on the PSU) Failed Engine Board Failed fusing thermopile Failed fusing thermistor Failed fusing unit
		Replace the thermopile. Replace the Fusing Unit. Replace the PSU. Replace the Engine Board. Clear the SP: fusing SC.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
544-00	A	Fusing (Center) thermopile high-temperature detected (hardware)
		The heating (Center) thermistor temperature becomes 250 or higher. (The hardware high-temperature error Sensor flag is detected at 10 ms intervals.)
		Damaged, shorted triac (element on the PSU) Failed engine control board Failed fusing thermopile Failed fusing thermistor Abnormal fusing control software behavior
		Clear the SP: fusing SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
545-00	A	Fusing (Center) heater stay ON
		The fusing (Center) heater stays ON for 3 seconds or more when in stand-by state (or the fusing roller is not rotating).
		Stained thermopile lens Broken heater wire The overtemperature prevention mechanism started working
		Clear the SP: fusing SC. Clean the thermopile lens. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
547-01	D	Zero-crossing error (adhered relay contact)
		When the fusing relay is in an OFF state, a "zero-crossing interrupt request" occurs in 50 ms.
		Damaged fusing relay (adhered contact) Failed fusing relay drive circuit
		Turn the main power OFF and then ON. Replace the harness. Replace the PC board. Replace the PSU.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
547-02	D	Zero-crossing error (bad relay contact)
		If a "zero-crossing interrupt request" does not occur within 3 seconds when the fusing relay is in an ON state, an error results.
		Damaged fusing relay (open contact) Failed fusing relay drive circuit PSU fuse (24VS) blown
		Turn the main power OFF and then ON. Replace the harness. Replace the Engine Board. Replace the PSU. Replace the fuse.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
547-03	D	Zero-crossing error (low frequency error)
		The number of zero-crossing interrupts does not reach a certain value in 500 ms.
		The frequency of the commercial power supply line is unstable.
		Turn the main power OFF and then ON. Check the commercial power supply line. Replace the harness. Replace the Engine Board. Replace the PSU.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
551-00	A	Broken fusing (End) thermistor wire
		AD value: 3F9h-3FFh is detected for specified seconds continuously. Detection period: 500 ms, detection frequency: 10 times or more
		Broken thermistor wire Bad connector contact
		Clear the SP: fusing SC. Check the connector connection. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
552-03	A	Fusing (End) thermistor not reloaded
		The heating (End) thermistor does not reach 60 deg C 12.5 seconds after the start of motor rotation.
		Deformed or floating thermistor Broken heater wire Input voltage out of range The overtemperature prevention mechanism started working
		Clear the SP: fusing SC. Replace the fusing (End) thermistor. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
553-00	A	Fusing (End) thermistor high-temperature detected (software)
		The temperature is detected to stay at 230 deg C or higher for one second.
		Shorted triac (element on the PSU) Failed Engine Board Failed fusing thermopile Failed fusing thermistor Failed fusing unit
		Clear the SP: fusing SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
554-00	A	Fusing (End) thermistor high-temperature detected (hardware)
		The heating (End) thermistor temperature becomes 250 or higher. (The hardware high-temperature error Sensor flag is detected at 10 ms intervals.)
		Damaged, shorted triac (element on the PSU) Failed engine control board Failed fusing thermopile Failed fusing thermistor Abnormal fusing control software behavior
		Clear the SP: fusing SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
557-00	C	Zero-crossing frequency exceeded
		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.
		None

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
559-00	A	Fusing jam detected 3 times in succession
		Fusing jam is detected three times in succession.
		Paper is wrapped around the fusing roller.
		CLEAR THE SP: FUSING SC.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
561-00	A	Broken pressure (Center) thermistor wire
		At least ten times, the temperature is detected to stay at 0 deg C or less for 39 seconds.
		Broken thermistor wire Bad connector contact
		CLEAR THE SP: FUSING SC. Check the connector connection. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
562-03	A	Pressure (Center) thermistor not reloaded
		The pressure (Center) thermistor does not reach 60 deg C 39 seconds after the start of motor rotation.
		Deformed or floating thermistor Broken heater wire Input voltage out of range The overtemperature prevention mechanism started working
		CLEAR THE SP: FUSING SC. Replace the pressure (Center) thermistor. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
563-00	D	Pressure (Center) thermistor high-temperature detected (software)
		The temperature is detected to stay at 230 deg C or higher for one second.
		Shorted triac (element on the PSU) Failed Engine Board Failed fusing thermopile Failed fusing thermistor Failed fusing unit
		CLEAR THE SP: FUSING SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
564-00	A	Pressure (Center) thermistor high-temperature detected (hardware)
		The pressure (Center) thermistor temperature becomes 250 or higher. (The hardware high-temperature error Sensor flag is detected at 10 ms intervals.)
		Damaged, shorted triac (element on the PSU) Failed Engine Board Failed fusing thermopile Failed fusing thermistor Abnormal fusing control software behavior
		CLEAR THE SP: FUSING SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
571-00	A	Broken pressure (End) thermistor wire
		At least ten times, the temperature is detected to stay at 0 deg C or less for 39 seconds.
		Broken thermistor wire Bad connector contact
		CLEAR THE SP: FUSING SC. Check the connector connection. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
572-03	A	Pressure (End) thermistor not reloaded
		The pressure (End) thermistor does not reach 60 deg C 38 seconds after the start of motor rotation.
		Deformed or floating thermistor Broken heater wire Input voltage out of range The overtemperature prevention mechanism started working
		CLEAR THE SP: FUSING SC. Replace the pressure (End) thermistor. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
573-00	D	Pressure (End) thermistor high-temperature detected (software)
		The temperature is detected to stay at 230 deg C or higher for one second.
		Shorted triac (element on the PSU) Failed Engine Board Failed fusing thermopile Failed fusing thermistor Failed fusing unit
		CLEAR THE SP: FUSING SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.

SC NO.	Pattern	Details (Symptom, Possible Cause, Troubleshooting Procedures)
574-00	A	Pressure (End) thermistor high
		The pressure (End) thermistor temperature becomes 250 deg C or higher. (The hardware high-temperature error Sensor flag is detected at 10ms intervals.)
		Damaged, shorted triac (element on the PSU) Failed Engine Board Failed fusing thermopile Failed fusing thermistor Abnormal fusing control software behavior
		Clear the SP: fusing SC. Replace the PSU. Replace the Engine Board. Replace the fusing thermopile. Replace the Fusing Unit.