• Code: 8300
• Description: Center-folding unit communication error (4000-sheet finisher)
  Communication with the center-folding unit is not possible.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF set sensor.
  Defective 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. CF main PWB (YC7) and DF main PWB (YC9)
  Defective CF set sensor. Replace the CF set sensor.
  Defective PWB. Replace the CF main PWB or the DF main PWB and check for correct operation.

• Code: 8310
• Description: CF side registration motor 2 error (4000-sheet finisher)
  When initial operation, CF side registration sensor 2 does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF side registration sensor 2.
  Defective CF side registration motor 2.
  Defective CF main 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. CF side registration motor 2 and CF main PWB (YC10) CF side registration sensor 2 and CF main PWB (YC20)
  Defective CF side registration sensor 2. Replace CF side registration sensor 2.
  Defective CF side registration motor 2. Replace CF side registration motor 2.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8320
• Description: CF adjustment motor error (4000-sheet finisher)
  When initial operation, CF adjustment sensor does not turn on within 2.5 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF adjustment sensor 1, 2.
  Defective CF adjustment motor 1, 2.
  Defective CF main 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. CF adjustment motor 1, 2 and CF main PWB (YC10) CF adjustment sensor 1, 2 and CF main PWB (YC20)
  Defective CF adjustment sensor 1, 2. Replace CF adjustment sensor 1, 2.
  Defective CF adjustment motor 1, 2. Replace CF adjustment motor 1, 2.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8330
• Description: CF blade motor error (4000-sheet finisher)
  When initial operation, CF blade sensor does not turn on within 3 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF blade sensor.
  Defective CF blade motor.
  Defective CF main 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. CF blade motor and CF main PWB (YC15) CF blade sensor and CF main PWB (YC20)
  Defective CF blade sensor. Replace the CF blade sensor.
  Defective CF blade motor. Replace the CF blade motor.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8340
• Description: CF staple motor error 1 (4000-sheet finisher)
  Staple JAM (Folding unit) has been detected twice in a row. (The home position could not be detected in 600 ms since the motor was driven after jam was detected twice.)
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF staple sensor.
  Defective CF staple motor.
  Defective CF main 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. CF staple unit and CF main PWB (YC13)
  Defective CF staple sensor. Defective CF staple motor. Replace the CF staple unit.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8350
• Description: CF side registration motor 1 error (4000-sheet finisher)
  When initial operation, CF side registration sensor 1 does not turn on within 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF side registration sensor 1.
  Defective CF side registration motor 1.
  Defective CF main 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. CF side registration motor 1 and CF main PWB (YC10) CF side registration sensor 1 and CF main PWB (YC20)
  Defective CF side registration sensor 1. Replace CF side registration sensor 1.
  Defective CF side registration motor 1. Replace CF side registration motor 1.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8360
• Description: CF main motor error (4000-sheet finisher)
  During driving the motor, lock signal is detected for 1 s continuously
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF main motor.
  Defective CF main 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. CF main motor and CF main PWB (YC16)
  Defective CF main motor. Replace the CF main motor.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.

• Code: 8370
• Description: CF staple motor error 2 (4000-sheet finisher)
  Staple JAM (DF) has been detected twice in a row. (The home position could not be detected in 600 ms since the motor was driven after jam was detected twice.)
• Causes: Defective connector cable or poor contact in the connector.
  Defective CF staple motor.
  Defective CF main 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. CF staple unit and CF main PWB (YC13)
  Defective CF staple motor. Replace the CF staple unit.
  Defective CF main PWB. Replace the CF main PWB and check for correct operation.