• Code: 8260
• Description: DF middle motor error
  When the DF middle motor is driven, DF middle sensor does not turn on within 1s.
• Causes: DF middle motor. DF middle sensor. DF main PWB.
• Remedy: DF middle motor 1. Execute U240 Motor - Middle(L) to check the finisher operation. 2. Check that the drive from the motor reaches the middle roller. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF middle motor and DF main PWB (YC10) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the DF middle motor.
  DF middle sensor 1. Execute U241 Finisher - Middle Tray Eject to check the finisher switch. 2. Check that the sensor and its mounting bracket are correctly positioned. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF middle sensor and DF main PWB (YC20) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the DF middle sensor.
  DF main PWB Replace the DF main PWB (Refer to the service manual for the document finisher).

• Code: 8410
• Description: Punch slide motor error 1
  The punch slide sensor won’t turn On when home position has been moved by 30 mm.
• Causes: Punch slide motor. Punch slide sensor. Punch PWB. DF main PWB.
• Remedy: Punch slide motor 1. Execute U240 Booklet - Punch Move to check the finisher operation. 2. Manipulate the punch slide part of the punch unit back and forth to check it can smoothly move. 3. Check that the drive from the motor reaches punch area. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch slide motor and Punch PWB (YC3) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the punch slide motor.
  Punch slide sensor 1. Execute U241 Punch - Punch HP to check the finisher switch. 2. Check that the sensor and its mounting bracket are correctly positioned. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch slide sensor and Punch PWB (YC6) 4. Replace the punch slide sensor.
  Punch PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch PWB (YC1) and DF main PWB (YC8) 2. Replace the punch PWB.
  DF main PWB Replace the DF main PWB

• Code: 8420
• Description: Punch slide motor error 2
  In detection of paper edges, the paper edge cannot be detected in 30 mm move.
• Causes: Punch slide motor. Punch paper edge sensor 1,2. Punch PWB. DF main PWB
• Remedy: Punch slide motor 1. Execute U240 Booklet - Punch Move to check the finisher operation. 2. Manipulate the punch slide part of the punch unit back and forth to check it can smoothly move. 3. Check that the drive from the motor reaches punch part. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch slide motor and Punch PWB (YC3) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the punch slide motor.
  Punch paper edge sensor 1,2 1. Execute U241 Punch - Edge Face 1,2,3,4 to check the finisher switch. 2. Check that the sensor and its mounting bracket are correctly positioned. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch paper edge sensor 1,2 and Punch PWB (YC5,YC7) 4. Replace the punch paper edge sensor 1,2.
  Punch PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch PWB (YC1) and DF main PWB (YC8) 2. Replace the Punch PWB.
  DF main PWB Replace the DF main PWB

• Code: 8430
• Description: Punch unit communication error
  Communication with the punch unit is not possible.
• Causes: Punch PWB. DF main PWB.
• Remedy: Punch PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch PWB (YC1) and DF main PWB (YC8) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Punch PWB.
  DF main PWB Replace the DF main PWB

• Code: 8800
• Description: Document finisher main program error
  Document finisher main program error at power up.
• Causes: DF main PWB. Engine PWB.
• Remedy: DF main PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF main PWB (YC7) and Engine PWB (YC18) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the DF main PWB
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 8900
• Description: Document finisher backup error
  Read and write data does not match 3 times in succession.
• Causes: DF main PWB
• Remedy: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF main PWB (YC7) and Engine PWB (YC33) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the DF main PWB

• Code: 8990
• Description: Backup memory data problem (document finisher)
  When one of the existence of a finisher or a bridge is not detected.
• Causes: Defective connector cable or poor contact in the connector. Defective power cord. EEPROM installed incorrectly. Defective finisher main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Check the connection of connector on the finisher main PWB and the connector of the machine, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective power cord Confirm that the power cable is firmly connected and, if necessary, connect the plug all the way in. Also check for continuity within the power cable. If none, replace the powercable.
  EEPROM installed incorrectly. Install EEPROM correctly.
  Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: 9000
• Description: Document processor communication error
  A communication error is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector. 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. DP main PWB and ISC PWB (YC12)
  Defective PWB. Replace the DP main PWB or the ISC PWB and check for correct operation.