Code :

Code: C3900
Description: Backup memory read/write problem (scanner PWB)
Read and write data does not match.
Causes: Defective backup RAM or PWB.
Remedy: Replace the scanner PWB and check for correct operation.

Code: C3910
Description: Backup memory data problem (scanner PWB)
Data in the specified area of the backup memory does not match the specified values.
Causes: Defective backup RAM or PWB.
Remedy: Replace the scanner PWB and check for correct operation.

Code: C4000
Description: Polygon motor synchronization problem
The polygon motor does not reach the stable speed within 20 s of the START signal turning on.
Causes: Poor contact in the connector terminals.
Defective polygon motor.
Defective engine PWB.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC36 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
Defective polygon motor. Replace the laser scanner unit.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C4010
Description: Polygon motor steady-state problem
Stable OFF is detected for 5 s continuously after polygon motor stability.
Causes: Poor contact in the connector terminals.
Defective polygon motor.
Defective engine PWB.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC36 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
Defective polygon motor. Replace the laser scanner unit.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C4200
Description: BD initialization problem
ASIC detects a BD error A for 4 s after the polygon motor rotation has been stabilized.
Causes: Poor contact in the connector terminals.
Defective polygon motor.
Defective engine PWB.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC36 on the engine PWB and laser scanner unit, and the continuity across the connector terminals. Repair or replace if necessary.
Defective polygon motor. Replace the laser scanner unit.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C6000
Description: Fuser heater break
Fuser thermistor 1 detected less than 40°C/104°F for 14 s during warm-up and ready in. Fuser thermistor 2 detected less than 70°C/158°F for 14 s during warm-up and ready in.
Causes: Defective fuser heater 1 or 2.
Installation defectiveness on fuser thermistor 1 or 2.
Defective fuser thermostat.
Defective PWB.
Remedy: Defective fuser heater 1 or 2. Replace the fuser heater 1 or 2.
Installation defectiveness on fuser thermistor 1 or 2. Check the mounting state of the fuser thermistor 1 or 2. If any problem is found, repair it.
Defective fuser thermostat. Replace the fuser thermostat.
Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

Code: C6020
Description: Abnormally high fuser thermistor center temperature
Fuser thermistor 2 is detected 230°C/ 446°F or more for 40 ms.
Causes: Installation defectiveness on fuser thermistor 2.
Defective fuser thermistor 2.
Defective engine PWB.
Remedy: Installation defectiveness on fuser thermistor 2. Check the mounting state of the fuser thermistor 2. If any problem is found, repair it.
Defective fuser thermistor 2. Replace the fuser thermistor 2.
Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C6050
Description: Abnormally low fuser thermistor center temperature
Fuser thermistor 1 is detected 100°C/ 212°F less then 1 s continuously during copying.
Causes: Defective fuser heater 1 or 2.
Installation defectiveness on fuser thermistor 2.
Defective PWB.
Remedy: Defective fuser heater 1 or 2. Replace the fuser heater 1 or 2.
Installation defectiveness on fuser thermistor 2. Check the mounting state of the fuser thermistor 2. If any problem is found, repair it.
Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.