• Code: 0150
• Description: Control PWB EEPROM error
  Detecting control PWB EEPROM (U300) communication error.
• Causes: Improper installation control PWB EEPROM (U300). Defective control PWB.
• Remedy: Improper installation control PWB EEPROM (U300). Check the installation of the EEPROM (U300) and remedy if necessary.
  Defective control PWB. Replace the control PWB.

• Code: 0420
• Description: Paper feeder communication error
  Communication error between control PWB and optional paper feeder.
• Causes: Improper installation paper feeder. Defective harness between control PWB (YC318) and paper feeder interface connector, or improper connector insertion. Defective control PWB. Defective harness between PF main PWB (YC5) and paper feeder interface connector, or improper connector insertion. Defective PF main- PWB.
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  Defective harness between control PWB (YC318) and paper feeder interface connector, or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective control PWB. Replace the control PWB.
  Defective harness between PF main PWB (YC5) and paper feeder interface connector, or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness (Refer to the service manual for the paper feeder).
  Defective PF main- PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• 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 (YC305), 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 (YC305), 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: 2610
• Description: PF paper feed motor error (Paper feeder 1)
  The PF paper feed motor of paper feeder 1 ready input is not given for 2 s during the PF paper feed motor is ON.
• Causes: Defective harness between PF paper feed motor and PF main PWB (YC4), or improper connector insertion. Defective drive transmission system of the PF paper feed motor.YC4). Defective PF main motor. Defective control PWB.
• Remedy: Defective harness between PF paper feed motor and PF main PWB (YC4), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness (Refer to the service manual for the paper feeder).
  Defective drive transmission system of the PF paper feed motor. Check if the gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective PF main motor. Replace the PF main motor (Refer to the service manual for the paper feeder).
  Defective control PWB. Replace the control PWB.

• Code: 2620
• Description: PF paper feed motor error (Paper feeder 2)
  The PF paper feed motor of paper feeder 2 ready input is not given for 2 s during the PF paper feed motor is ON.
• Causes: Defective harness between PF paper feed motor and PF main PWB (YC4), or improper connector insertion. Defective drive transmission system of the PF paper feed motor. Defective PF main motor. Defective control PWB.
• Remedy: Defective harness between PF paper feed motor and PF main PWB (YC4), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness (Refer to the service manual for the paper feeder).
  Defective drive transmission system of the PF paper feed motor. Check if the gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective PF main motor. Replace the PF main motor (Refer to the service manual for the paper feeder).
  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 (YC319), or improper connector insertion. Defective laser scanner unit. Defective control PWB.
• Remedy: Defective harness between polygon motor and control PWB (YC319), 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: 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.

• Code: 6020
• Description: Abnormally high fuser thermistor temperature
  Fuser thermistor detects abnormally temperature.
• Causes: Shorted fuser thermistor. Defective control PWB.
• Remedy: Shorted fuser thermistor. Replace the fuser unit.
  Defective control PWB. Replace the control PWB.