Description: EPU board memory overwriting error: The overwriting of the EPU board memory fails.
Remedy: (1) Check if the process unit is properly installed, and check if the connector pins that are connected to the equipment are disconnected or have any abnormality such as deformation. (2) Check if the harness connected to the connector J451 on the EPU board has any abnormality. (3) Replace the EPU memory board. (4) Replace the LGC board.
Code: C3D1
Description: EPU board memory new parts detection error: The EPU board detects the process unit as a new unit when the equipment is started in the normal mode.
Remedy: (1) If the process unit has been replaced with a new one before the equipment is started, turn the power OFF and then back ON in the EPU replacement mode ([7] + [START]). (2) If the process unit has not been replaced, check the following. (3) Check if the process unit is properly installed, and check if the connector pins that are connected to the equipment are disconnected or have any abnormality such as deformation. (4) Check if the harness connected to the connector J451 on the EPU board has any abnormality. (5) Replace the EPU memory board. (6) Replace the LGC board.
Code: C3D2
Description: EPU board memory old parts detection error: The EPU board cannot detect the new process unit when the equipment is started in the EPU replacement mode ([7] + [START]).
Remedy: (1) Check if the process unit is a new one. If it is a new one, check the following: (2) Check if the process unit is properly installed, and check if the connector pins that are connected to the equipment are disconnected or have any abnormality such as deformation. (3) Check if the harness connected to the connector J451 on the EPU board has any abnormality. (4) Replace the EPU memory board. (5) Replace the LGC board.
Code: C410
Description: Thermistor or heater abnormality at power-ON: Abnormality of service call the thermistor is detected when power is turned ON or the temperature of the fuser roller does not rise in a specified period of time after power is turned ON.
Remedy: (1) Check if the connectors are disconnected. (2) Check if the center, side and edge thermistors are in contact with the surface of the fuser roller properly? (3) Check if the harnesses of the center, side 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 thermostat is blown. 3. Check the LGC board (1) Check if the connectors CN308 are disconnected. (2) Check if the conductor pattern on the LGC board is short circuited or open circuited. (3) Replace the LGC board. 4. Clear the status counter After repairing the matter which caused the error [C410], perform the following: (1) Turn ON the power while [0] and [8] are pressed simultaneously. (2) Key in “400”, then press [START]. (3) Change the current status counter value “1” or “2” to “0”, then press [ENTER] or [INTERRUPT] (to cancel [C410]). (4) Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.
Code: C430
Description: Thermistor abnormality after abnormality judgment: Abnormality of the thermistor is detected after a specified period of time has passed from power-ON (including ready state).
Remedy: 1,2.3. Check the thermistors, Heater and LGC board Check the above components following the procedures 1, 2 and 3 for [C410]. 4. Clear the status counter Change the current status counter value (08-400) “4” to “0” for [C430] and “5”, “7” or “9” to “0” for [C440], taking the same procedure as that for [C410]. * The status counter value is as follows in the following cases. Change them to “0” respectively. • The error occurred during warming-up: “4” or “5” • The error occurred after the equipment has become ready: “7” • The temperature detected by the center thermistor is 240°C or higher: “9” • The temperature detected by the side thermistor is 240°C or higher: “9” • The temperature detected by the edge thermistor is 240°C or higher: “9” only during printing.
Code: C440
Description: Heater abnormality after abnormality judgment: The temperature of the fuser roller has exceeded the range of control or does not even reach the range.
Remedy: 1,2.3. Check the thermistors, Heater and LGC board Check the above components following the procedures 1, 2 and 3 for [C410]. 4. Clear the status counter Change the current status counter value (08-400) “4” to “0” for [C430] and “5”, “7” or “9” to “0” for [C440], taking the same procedure as that for [C410]. * The status counter value is as follows in the following cases. Change them to “0” respectively. • The error occurred during warming-up: “4” or “5” • The error occurred after the equipment has become ready: “7” • The temperature detected by the center thermistor is 240°C or higher: “9” • The temperature detected by the side thermistor is 240°C or higher: “9” • The temperature detected by the edge thermistor is 240°C or higher: “9” only during printing.