Description: Faults of RTC The time is judged to go back based on the comparison of the RTC time and the current time or five years or more have passed.
Causes: The battery is disconnected from the control PWB. Defective control PWB.
Remedy: The battery is disconnected from the control PWB. Check visually and remedy if necessary Defective control PWB. Replace the control PWB and check for correct operation.
Code: 0970
Description: 12 V power down detect Power is disconnected during sleeping.
Causes: Defective power source PWB.
Remedy: Defective power source PWB. Replace the power source PWB and check for correct operation.
Code: 2000
Description: Main motor error The main motor ready input is not given for 2 s during the main motor is ON.
Causes: Defective harness between main motor (CN1) and control PWB (YC331), or improper connector insertion. Defective drive transmission system of the main motor. Defective main motor. Defective control PWB.
Remedy: Defective harness between main motor (CN1) and control PWB (YC331), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness. Defective drive transmission system of the main motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any. Defective main motor. Replace the main motor. Defective control PWB. Replace the control PWB.
Code: 4000
Description: Polygon motor (laser scanner unit) error The polygon motor ready input is not given for 6 s during the polygon motor is ON.
Causes: Defective harness between polygon motor and control PWB (YC9), or improper connector insertion. Defective laser scanner unit. Defective control PWB.
Remedy: Defective harness between polygon motor and control PWB (YC9), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness. Defective laser scanner unit. Replace the laser scanner unit. Defective control PWB. Replace the control PWB.
Code: 4200
Description: BD error (laser scanner unit) error
Causes: Defective laser scanner unit. Defective control PWB.
Remedy: Defective laser scanner unit. Replace the laser scanner unit. Defective control PWB. Replace the control PWB.
Code: 6000
Description: Broken fuser heater lamp wire The fuser temperature does not rise after the fuser heater lamp has been turned on.
Causes: Poor contact in the fuser thermistor connector terminals. Poor contact in the fuser heater lamp connector terminals. Fuser thermistor installed incorrectly. Fuser thermal cutout triggered. Fuser heater lamp installed incorrectly. Broken fuser heater lamp wire.
Remedy: Poor contact in the fuser thermistor connector terminals. Reinsert the connector. Poor contact in the fuser heater lamp connector terminals. Reinsert the connector. Fuser thermistor installed incorrectly. Replace the fuser unit. Fuser thermal cutout triggered. Replace the fuser unit. Fuser heater lamp installed incorrectly. Replace the fuser unit. Broken fuser heater lamp wire. Replace the fuser unit.