• Code: 2620
• Description: PF paper feed motor error (Paper feeder)
  The PF paper feed motor of cassette 3 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 PF paper feed motor drive transmission system. 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 PF paper feed 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 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: 3100
• Description: ISU home position errorr.
• Causes: Defective FFC between CCD PWB (YC1) and control PWB (YC8). Defective FFC between control PWB (YC6) and scanner PWB (YC103), or improper FFC insertion. Defective home position sensor. Defective harness between ISU motor and scanner PWB (YC104), or improper connector insertion. Defective ISU motor.
• Remedy: Defective FFC between CCD PWB (YC1) and control PWB (YC8). Replace the image scanner unit (ISU).
  Defective FFC between control PWB (YC6) and scanner PWB (YC103), or improper FFC insertion. Reinsert the FFC. Also check for continuity within the FFC. If none, remedy or replace the FFC.
  Defective home position sensor. Replace the home position sensor.
  Defective harness between ISU motor and scanner PWB (YC104), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective ISU motor. Replace the ISU motor.

• Code: 3200
• Description: Exposure lamp error
  The exposure lamp is not turned on.
• Causes: Defective FFC between scanner PWB (YC103) and control PWB (YC6), or improper FFC insertion. Defective FFC between CCD PWB (YC1) and control PWB (YC8). Defective harness between CCD PWB (YC3) and LED drive PWB (YC1), or improper connector insertion. Defective harness between LED drive PWB (YC2) and exposure lamp, or improper connector insertion. Defective exposure lamp.sensor. Defective LED drive PWB. Defective control PWB.
• Remedy: Defective FFC between scanner PWB (YC103) and control PWB (YC6), or improper FFC insertion. Reinsert the FFC. Also check for continuity within the FFC. If none, remedy or replace the FFC.
  Defective FFC between CCD PWB (YC1) and control PWB (YC8). Replace the image scanner unit (ISU).
  Defective harness between CCD PWB (YC3) and LED drive PWB (YC1), 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 LED drive PWB (YC2) and exposure lamp, or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
  Defective exposure lamp. Replace the exposure lamp.
  Defective LED drive PWB. Replace the LED drive PWB.
  Defective control PWB. Replace the control PWB.

• Code: 3300
• Description: AGC error
  After AGC, correct input is not obtained at CCD.
• Causes: Defective FFC between CCD PWB (YC1) and control PWB (YC8). Defective exposure lamp.sensor. Defective CCD PWB. Defective control PWB.
• Remedy: Defective FFC between CCD PWB (YC1) and control PWB (YC8). Replace the image scanner unit (ISU).
  Defective exposure lamp. Replace the exposure lamp.
  Defective CCD PWB. Replace the CCD PWB.
  Defective control PWB. Replace the control PWB.

• Code: 3500
• Description: CPU - ASIC (CCD PWB) communication error
  An error code is detected.
• Causes: Defective FFC between CCD PWB (YC1) and control PWB (YC8). Defective CCD PWB. Defective control PWB.
• Remedy: Defective FFC between CCD PWB (YC1) and control PWB (YC8). Replace the image scanner unit (ISU).
  Defective CCD PWB. Replace the CCD PWB.
  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 (YC10), or improper connector insertion. Defective laser scanner unit. Defective control PWB.
• Remedy: Defective harness between polygon motor and control 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 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: BD sensor does not detect laser beam due to condensation on the polygon mirror. Defective laser scanner unit. Defective control PWB.
• Remedy: BD sensor does not detect laser beam due to condensation on the polygon mirror. Turn machine power off for at least 30 minutes, then turn machine on again. If not cured, replace the laser scanner unit.
  Defective laser scanner unit. Replace the laser scanner unit.
  Defective control PWB. Replace the control PWB.

• Code: 4700
• Description: VIDEO ASIC device error
  Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Defective connector cable or poor contact in the connector. Defective control 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.
  Defective control PWB. Replace the control PWB.