Code :

Code: C6120
Description: Abnormally high fuser thermistor 2 temperature The fuser temperature exceeds 190 C/ 374 F.
Causes: Installation defectiveness on fuser thermistor 2. Defective PWB.
Remedy: Installation defectiveness on fuser thermistor 2. Measure the resistance. If it is ∞Ω, replace the fuser unit. Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

Code: C6130
Description: Fuser thermistor 2 break error Fuser thermistor 2 detected less than 40 C/104 F during driving. When the difference of temperature of fuser thermistor 1 and 3 becomes 100 C/212 F or more.
Causes: Installation defectiveness on fuser thermistor 2. Defective fuser heater 3. Defective PWB.
Remedy: Installation defectiveness on fuser thermistor 2. Measure the resistance. If it is ∞Ω, replace the fuser unit. Defective fuser heater 3. Check for continuity across each heater. If none, replace the fuser unit. Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

Code: C6400
Description: Zero-cross signal error While fuser heater ON/OFF control is performed, the zero-cross signal is not input within 3 s.
Causes: Defective PWB.
Remedy: Defective PWB. Replace the engine PWB or power source PWB and check for correct operation.

Code: C7000
Description: Toner motor problem The rated speed achievement signal won’t turn to L in 5 s since the motor is activated. The rated speed achievement signal turns to H every other 5 s after the machine is stabilized.
Causes: Poor contact in the connector terminals. Broken the gear. Defective toner motor M/C/Y/BK. Defective engine PWB.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC30 on the engine PWB and the connector on the toner motor, and the continuity across the connector terminals. Repair or replace if necessary. Broken the gear. Check visually and replace the gear if necessary. Defective toner motor M/C/Y/BK. Run maintenance item U135 and check if the toner motor operates. If not, replace the toner motor. Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C7101
Description: Toner sensor BK problem Sensor output value of 78 or less or 944 or more continued for 3 s.
Causes: Defective developing unit BK. Defective engine PWB.
Remedy: Defective developing unit BK. Replace the developing unit BK. Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C7102
Description: Toner sensor C problem Sensor output value of 78 or less or 944 or more continued for 3 s.
Causes: Defective developing unit C. Defective engine PWB.
Remedy: Defective developing unit C. Replace the developing unit C. Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C7103
Description: Toner sensor M problem Sensor output value of 78 or less or 944 or more continued for 3 s.
Causes: Defective developing unit M. Defective engine PWB.
Remedy: Defective developing unit M. Replace the developing unit M. Defective engine PWB. Replace the engine PWB and check for correct operation.

Code: C7104
Description: Toner sensor Y problem Sensor output value of 78 or less or 944 or more continued for 3 s.
Causes: Defective developing unit Y. Defective engine PWB.
Remedy: Defective developing unit Y. Replace the developing unit Y. Defective engine PWB. Replace the engine PWB and check for correct operation.