• Code: C413
• Description: Fuser unit related service call. Thermistor abnormality during warming up or in ready status after abnormality judgment.
• Causes: MAIN board Thermistors Heater lamp
• Remedy: 1 Check the power voltage Check if the power voltage is normal. (Is the voltage during the operation ±10% of the rated voltage?) 2 Check the each elements of error status Check the abnormal thermistors 08-4570-0: Center thermistor 08-4570-1: Side thermistor 08-4570-2: Edge thermistor 08-4570-5: Error counter 3 Check the thermistors 1. Check if the connectors are disconnected. 2. Check if the center and edge thermistors are in contact with the surface of the fuser roller properly? 3. Check if the center and edge thermistors are not deformed or dirty. 4. Check if the harnesses of the center and edge thermistors are open circuited. 4 Check the heater 1. Check if the heater is broken. 2. Check if the connector of the heater is disconnected. 3. Check if the harnesses are connected properly to the terminals of the heater lamp. 4. Check if the thermostat is blown. 5 Check the MAIN board 1. Check if the connectors are disconnected. 2. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 3. Replace the MAIN board. 6 Clear the status counter After repairing the matter which caused the error [C413 / C414], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “2002”, then press [START]. 3. Change the current status counter value “1” or “2” to “0”, then press [OK] (to cancel [C413 / C414]). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.

• Code: C415
• Description: Fuser unit related service call. No recovery even after one minute elapses after low temperature WAIT state is entered during a printing operation.
• Causes: MAIN board
• Remedy: 1. Check the thermistors 1. Check if the connectors are disconnected. 2. Check if the center and edge thermistors are in contact with the surface of the fuser roller properly? 3. Check if the center and edge thermistors are not deformed or dirty. 4. Check if the harnesses of the center and edge thermistors are open circuited. 2. Check the heater 1. Check if the heater is broken. 2. Check if the connector of the heater is disconnected. 3. Check if the harnesses are connected properly to the terminals of the heater lamp. 4. Check if the thermostat is blown. 3. Check the MAIN board 1. Check if the connectors CN10 are disconnected. 2. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 3. Replace the MAIN board 4. Check the power supply 1. Check if the connectors are disconnected. 2. Replace the switching regulator. 5. Clear the status counter After repairing the matter which caused the error [C415], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “2002”, then press [START]. 3. Change the current status counter value “5” to “0”, then press [OK] (to cancel [C415]). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.

• Code: C447
• Description: Fuser unit related service call. While in the READY state, one of the thermistors detected the specified temperature or higher.
• Causes: MAIN board
• Remedy: 1. Check the thermistors 1. Check if the connectors are disconnected. 2. Check if the center and edge thermistors are in contact with the surface of the fuser roller properly? 3. Check if the center and edge thermistors are not deformed or dirty. 4. Check if the harnesses of the center and edge thermistors are open circuited. 2. Check the heater 1. Check if the heater is broken. 2. Check if the connector of the heater is disconnected. 3. Check if the harnesses are connected properly to the terminals of the heater lamp. 4. Check if the thermostat is blown. 3. Check the MAIN board 1. Check if the connectors CN10 are disconnected. 2. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 3. Replace the MAIN board 4. Check the power supply 1. Check if the connectors are disconnected. 2. Replace the switching regulator. 5. Clear the status counter After repairing the matter which caused the error [C447], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “2002”, then press [START]. 3. Change the current status counter value “7”or “24” to “0”, then press [OK] (to cancel [C447]). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.

• Code: C449
• Description: Fuser unit related service call. High temperature detection error
• Causes: MAIN board
• Remedy: 1. Check the thermistors 1. Check if the connectors are disconnected. 2. Check if the center and edge thermistors are in contact with the surface of the fuser roller properly? 3. Check if the center and edge thermistors are not deformed or dirty. 4. Check if the harnesses of the center and edge thermistors are open circuited. 2. Check the heater 1. Check if the heater is broken. 2. Check if the connector of the heater is disconnected. 3. Check if the harnesses are connected properly to the terminals of the heater lamp. 4. Check if the thermostat is blown. 3. Check the MAIN board 1. Check if the connectors CN10 are disconnected. 2. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 3. Replace the MAIN board 4. Check the power supply 1. Check if the connectors are disconnected. 2. Replace the switching regulator. 5. Clear the status counter After repairing the matter which caused the error [C449], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “2002”, then press [START]. 3. Change the current status counter value “9”, “19”, “21”, “22”, “23”, “25”, “27”, “29” or “45” to “0”, then press [OK] (to cancel [C449]). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.

• Code: C452
• Description: Fuser unit related service call. In the READY state, temperature differential error between the center thermistor and a side thermistor
• Causes: MAIN board
• Remedy: 1. Check the thermistors 1. Check if the connectors are disconnected. 2. Check if the center and edge thermistors are in contact with the surface of the fuser roller properly? 3. Check if the center and edge thermistors are not deformed or dirty. 4. Check if the harnesses of the center and edge thermistors are open circuited. 2. Check the MAIN board 1. Check if the connectors CN10 are disconnected. 2. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 3. Replace the MAIN board 3. Clear the status counter After repairing the matter which caused the error [C452], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “2002”, then press [START]. 3. Change the current status counter value “62” to “0”, then press [OK] (to cancel [C452]). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.

• Code: C4B0
• Description: Fuser unit related service call. Fixer counter data error
• Causes: MAIN board
• Remedy: 1. Check the MAIN board 1. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 2. Check if the Memory(IC11) is installed properly. 3. Replace the MAIN board 2. Clear the status counter After repairing the matter which caused the error [C4B0], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “2002”, then press [START]. 3. Rewrite the displayed counter with “0” and then press the [OK] button ([C4B0] clear). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.

• Code: C911
• Description: Circuit related service call. Toner IC chip access circuit board error
• Causes: Toner cartridge MAIN board HRNS-MAIN-PU-240 CTIF board
• Remedy: 1 Does the recommended toner cartridge display appear when the toner supply cover is opened and closed? Yes Use the recommended TOSHIBA toner cartridge. 2 No 2 Toner cartridge • Check the phenomenon by removing the toner cartridges and reinserting them. • Check that the CTRG board of the cartridge is installed properly. 3 Contact point on the equipment side Check that the spring of the contact point is not deformed. 4 Is the spring of the contact point returned when it is pushed lightly? Yes No • Check that the CTIF board is installed properly. • Board check 7 5 MAIN board • Connector check (CN15) • Board check 6 HRNS-MAIN-PU-240 • Connector check (CN15: Main board, CN150: CTIF board) • Harness check 7 CTIF board • Check that the board is installed properly. • Board check

• Code: C940
• Description: Circuit related service call. Engine-CPU abnormality
• Causes: MAIN board
• Remedy: Main power switch Turn OFF the main power switch, then back ON. Engine-CPU and FROM Check if the conductor pattern between the Engine-CPU and FROM is short circuited or open circuited. MAIN board Board check