• Code: 0150
• Description: Engine PWB EEPROM error
  Detecting engine PWB EEPROM communication error.
• Causes: Improper installation engine PWB EEPROM. Defective engine PWB
• Remedy: Improper installation engine PWB EEPROM. Check engine PWB EEPROM installation, Remedy.
  Defective engine PWB Replace the engine PWB.

• Code: 0420
• Description: Paper feeder communication error
  Communication error between engine PWB and optional paper feeder.Fѕ
• Causes: Improper installation paper feeder. Defective harness between connect-L PWB (YC2) and paper feeder interface connector, or improper connector insertion. Defective harness between connect-L PWB (YC2) and paper feeder interface connector, or improper connector insertion. Defective harness between connect-L PWB (YC6) and engine PWB (YC4), or improper connector insertion. Defective harness between connect-L PWB (YC6) and engine PWB (YC4), or improper connector insertion. Defective engine PWB. Defective paper feeder.
• Remedy: Improper installation paper feeder. Follow installation instruction carefully again.
  Defective harness between connect-L PWB (YC2) 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 harness between connect-L PWB (YC6) and engine PWB (YC4), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective engine PWB. Replace the engine PWB
  Defective paper feeder. Replace the paper feeder.

• Code: 2000
• Description: Main motor error
  MMOTRDYN signal does not go low within 2 s after MMOTONN signal goes low.
• Causes: Defective harness between main motor and engine PWB (YC10), or improper connector insertion. Defective main motor drive transmission system. Defective main motor. Defective engine PWB.
• Remedy: Defective harness between main motor and engine PWB (YC10), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective main motor drive transmission system. 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 engine PWB. Replace the engine PWB.

• Code: 2200
• Description: Drum motor error
  DMOTRDYN signal does not go low within 2 s after DMOTONN signal goes low.
• Causes: Defective harness between drum motor and engine PWB (YC11), or improper connector insertion. Defective drum motor drive transmission system. Defective drum motor. Defective engine PWB.
• Remedy: Defective harness between drum motor and engine PWB (YC11), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective drum motor drive transmission system. Check if the gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective drum motor. Replace the drum motor.
  Defective engine PWB. Replace the engine PWB.

• Code: 4000
• Description: Polygon motor (laser scanner unit) error
  POLRDYN signal does not go low within 2 s after POLONN signal goes low.
• Causes: Defective harness between polygon motor and main PWB (YC10), or improper connector insertion. Defective harness between main PWB (YC11) and engine PWB (YC12), or improper connector insertion. Defective laser scanner unit. Defective engine PWB. Defective main PWB.
• Remedy: Defective harness between polygon motor and main PWB (YC10), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective harness between main PWB (YC11) and engine PWB (YC12), 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 engine PWB. Replace the engine PWB.
  Defective main PWB. Replace the main PWB.

• Code: 4200
• Description: Laser output (pin photo sensor) error
  The pin photo signal (PDN) is not output within a specified time after the polygon motor ready signal (POLRDYN) becomes ready (L level).
• Causes: Defective harness between PD PWB (YC1) and main PWB (YC12), or improper connector insertion. Defective APC PWB. Defective PD PWB. Defective main PWB.
• Remedy: Defective harness between PD PWB (YC1) and main PWB (YC12), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective APC PWB. Replace the laser scanner unit.
  Defective PD PWB. Replace the laser scanner unit.
  Defective main PWB. Replace the main PWB.

• Code: 5100
• Description: Short-circuited main charger output
  Five pages have been printed with the main charger output short-circuited.
• Causes: Drum unit installed incorrectly. Engine PWB installed incorrectly. Defective engine PWB
• Remedy: Drum unit installed incorrectly. Verify harness is not pinched in the drum unit.
  Engine PWB installed incorrectly. Verify harness is not pinched in the engine PWB.
  Defective engine PWB. Replace the engine PWB.

• Code: 6000
• Description: Broken fuser heater lamp M wire
  The temperature does not reach 100°C/ 212°F after the fuser heater lamp M has been turned on continuously for 30 s. The fuser thermistor M detection temperature does not rise by 1°C/1.8°F after the fuser heater lamp M has been turned on continuously for 15 s during warm-up or at standby. The fuser thermistor S detection temperature does not rise by 1°C/1.8°F after the fuser heater lamp M has been turned on continuously for 10 s during warm-up or at standby. The temperature does not rise by 1°C/ 1.8°F after the fuser heater lamp M has been turned on continuously for 5 s during printing.
• Causes: Poor contact in the fuser thermistor M connector terminals. Fuser thermistor M installed incorrectly. Thermal cutout triggered. Fuser heater lamp M installed incorrectly. Broken fuser heater lamp M wire.
• Remedy: Poor contact in the fuser thermistor M connector terminals. Reinsert the connector.
  Fuser thermistor M installed incorrectly. Check and reinstall if necessary.
  Thermal cutout triggered. Check for continuity. If none, replace the thermal cutout.
  Fuser heater lamp M installed incorrectly. Check and reinstall if necessary.
  Broken fuser heater lamp M wire. Check for continuity. If none, replace the fuser heater lamp M.