• Code: 4600
• Description: LSU cleaning motor error
  After LSU cleaning motor is driven, the ready signal does not turn to L within 2 s. After LSU cleaning motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system of motor.
  Defective LSU cleaning motor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. LSU cleaning motor and engine PWB (YC21)
  Defective drive transmission system of motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective LSU cleaning motor. Replace the LSU cleaning motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5101
• Description: Main high-voltage error K
  Abnormality of charger roller K is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC4) and engine PWB (YC17)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5102
• Description: Main high-voltage error C
  Abnormality of charger roller C is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC2) and engine PWB (YC16)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5103
• Description: Main high-voltage error M
  Abnormality of charger roller M is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC3) and engine PWB (YC17)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 5104
• Description: Main high-voltage error Y
  Abnormality of charger roller Y is detected when Vpp adjustment.
• Causes: Defective connector cable or poor contact in the connector.
  Defective high voltage PWB 1.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. High voltage PWB 1 (YC1) and engine PWB (YC16)
  Defective high voltage PWB 1. Replace the high voltage PWB 1 and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6000
• Description: Broken fuser heater wire
  Fuser thermistor 1 does not reach 100° C/212 °F even after 60 s during warming up. The detected temperature of fuser thermistor 1 does not reach the specified temperature (ready indication temperature) for 60 s in warming up after reached to 100° C/212 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Power source PWB (YC3) and fuser IH PWB (YC1) Fuser IH PWB (YC4) and engine PWB (YC26)
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6020
• Description: Abnormally high fuser thermistor 1 temperature
  Fuser thermistor 1 detects a temperature higher than 240°C/464°F for 1 s.
• Causes: Deformed connector pin.
  Defective triac.
  Shorted fuser thermistor 1.
  Defective engine PWB.
• Remedy: Shorted fuser thermistor 1. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6030
• Description: Broken fuser thermistor 1 wire
  Input from fuser thermistor 1 is 984 or more (A/D value) continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective triac.
  Broken fuser thermistor 1 wire.
  Fuser thermostat triggered.
  Defective fuser IH.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser unit and engine PWB (YC26)
  Broken fuser thermistor 1 wire. Replace the fuser unit.
  Fuser thermostat triggered. Replace the fuser unit.
  Defective fuser IH. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.