Description: Deck conveying motor/desk drive motor problem • No pulse is input within 500 ms of the start-up. • No pulse is input within 100 ms of the previous pulse input.
Causes: Defective deck conveying motor board/desk drive motor board. Deck conveying motor /desk drive motor does not rotate correctly (the motor is overloaded). Poor contact in the deck conveying motor/desk drive motor connector terminals.
Remedy: Replace the deck conveying motor board/ desk drive motor board and check for correct operation. Check the gears and remedy if necessary. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
Code: 4000
Description: Polygon motor synchronization problem • The polygon motor does not reach the stable speed within 15 s of the polygon motor remote signal turning on.
Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective power supply unit. Defective engine controller PWB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU (see page 1-6-11). Check if 24 V DC is supplied to CN2-1 on the engine controller PWB. If not, replace the power supply unit. Check if 24 V DC is output from CN8-10 on the engine controller PWB. If not, replace the engine controller PWB.
Code: 4010
Description: Polygon motor steady-state problem • The polygon motor rotation is not stable for 600 ms after the polygon motor rotation has been stabilized.
Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective power supply unit. Defective engine controller PWB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU (see page 1-6-11). Check if 24 V DC is supplied to CN2-1 on the engine controller PWB. If not, replace the power supply unit. Check if 24 V DC is output from CN8-10 on the engine controller PWB. If not, replace the engine controller PWB.
Code: 4200
Description: BD steady-state problem • The VTC detects a BD error for 600 ms after the polygon motor rotation has been stabilized.
Remedy: Replace the cleaning lamp. Replace the engine controller PWB and check for correct operation.
Code: 6000
Description: Broken fuser heater wire • The fuser temperature does not increase for 40 s after the fuser heaters have been turned on for warming up. • The fuser temperature remains below 50 °C/122 °F for 10 s continuously after the fuser heaters have been turned on during stabilization.
Causes: Poor contact in the fuser unit thermistor connector terminals. Fuser unit thermistor installed incorrectly. Fuser unit thermostat triggered. Fuser unit heater M or S installed incorrectly.
Remedy: Check the connection of connector CN10 on the engine controller PWB and the continuity across the connector terminals. Repair or replace if necessary. Check and reinstall if necessary. Check for continuity. If none, replace the fuser unit thermostat. Check and reinstall if necessary. Check for continuity. If none, replace the fuser unit heater M or S (see page 1-6-20).