• Code: 7901
• Description: Drum EEPROM error No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Drum unit. Engine PWB
• Remedy: Drum unit 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Durm unit and Drum relay PWB (YC2) Drum relay PWB (YC1) and Engine PWB (YC12) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Drum unit.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 7911
• Description: Developer unit EEPROM error No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs 8 times successively. Mismatch between writing data and reading data occurs 8 times successively.
• Causes: Developer unit. Engine PWB
• Remedy: Developer unit 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Developer unit and developer relay PWB (YC1) Developer relay PWB (YC2) and Engine PWB (YC11) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Developer unit.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 8010
• Description: Punch motor 1 error When the punch motor is driven, punch home position sensor does not turn on within 200 ms.
• Causes: Punch motor. Punch home position sensor. Punch PWB. DF main PWB
• Remedy: Punch motor 1. Execute U240 Motor - Punch to check the finisher operation. 2. Manipulate the punch up and down to check it can smoothly move up and down. 3. Check that the drive from the motor reaches the punch cam. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch motor and Punch PWB (YC4) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the punch motor.
  Punch home position 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 home position sensor and Punch PWB (YC8) 4. Replace the Punch home position 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 (YC7) (3000-sheet finisher) Punch PWB (YC1) and DF main PWB (YC8) (1000-sheet finisher) 2. Replace the punch PWB.
  DF main PWB Replace the DF main PWB.

• Code: 8020
• Description: Punch motor 2 error Home position is not obtained in 3 s after home position is initialized or in standby.
• Causes: Punch motor. Punch PWB. DF main PWB
• Remedy: Punch motor 1. Execute U240 Motor - Punch to check the finisher operation. 2. Manipulate the punch up and down to check it can smoothly move up and down. 3. Check that the drive from the motor reaches the punch cam. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch motor and Punch PWB (YC4) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the punch motor.
  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 (YC7)(3000-sheet finisher) Punch PWB (YC1) and DF main PWB (YC8)(1000-sheet finisher) 2. Replace the punch PWB.
  DF main PWB Replace the DF main PWB.

• Code: 8030
• Description: Punch motor 3 error Home position does not turn from On to Off in 50 ms after home position has been initialized.
• Causes: Punch motor. Punch PWB. DF main PWB
• Remedy: Punch motor 1. Execute U240 Motor - Punch to check the finisher operation. 2. Manipulate the punch up and down to check it can smoothly move up and down. 3. Check that the drive from the motor reaches the punch cam. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Punch motor and Punch PWB (YC4) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the punch motor.
  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 (YC7) (3000-sheet finisher) Punch PWB (YC1) and DF main PWB (YC8) (1000-sheet finisher) 2. Replace the punch PWB.
  DF main PWB Replace the DF main PWB.

• Code: 8090
• Description: DF paddle motor error When the DF paddle motor is driven, DF paddle sensor does not turn on within 1 s.
• Causes: DF paddle motor. DF paddle sensor. DF main PWB
• Remedy: DF paddle motor 1. Execute U240 Motor - Beat to check the finisher operation. 2. Check that the paddle can rotate. 3. Check that the drive from the motor reaches the paddle. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF paddle motor and DF main PWB (YC15) (3000-sheet finisher) DF paddle motor and DF main PWB (YC11) (1000-sheet finisher) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the DF paddle motor.
  DF paddle sensor 1. Execute U241 Finisher - Lead Paddle 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 paddle sensor and DF main PWB (YC22) (3000-sheet finisher) DF paddle sensor and DF main PWB (YC20) (1000-sheet finisher) 4. Replace the DF paddle sensor.
  DF main PWB Replace the DF main PWB.

• Code: 8100
• Description: DF eject release motor error When the DF eject release motor is driven, DF bundle discharge sensor does not turn on within 1 s.
• Causes: DF eject release motor DF bundle discharge unit sensor. DF bundle discharge unit sensor. DF main PWB
• Remedy: DF eject release motor DF bundle discharge unit sensor 1. Execute U240 Motor - Eject Unlock (Full) to check the finisher operation. 2. Check that the eject guide of the process tray is opened and, if not, correct the guide. 3. Check that the drive from the motor reaches the eject guide. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF bundle discharge unit sensor and DF main PWB (YC22)(3000-sheet finisher) DF bundle discharge unit sensor and DF main PWB (YC20)(1000-sheet finisher) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the DF eject release motor.
  DF bundle discharge unit sensor 1. Execute U241 Finisher - Bundle Eject 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. DF bundle discharge unit sensor and DF main PWB (YC22)(3000-sheet finisher) DF bundle discharge unit sensor and DF main PWB (YC20)(1000-sheet finisher) 4. Replace the DF bundle eject unit sensor.
  DF main PWB Replace the DF main PWB.

• Code: 8110
• Description: DF shift motor 1 error (3000-sheet finisher) DF shift sensor 1 won’t turn on when it has travelled 160 mm after DF shift motor 1 is driven.
• Causes: DF shift motor 1 front. DF shift sensor 1 front. DF main PWB
• Remedy: DF shift motor 1 front 1. Execute U240 Motor - Sort Test to check the finisher operation. 2. Manipulate the front shift guide back and forth to check it is smoothly operable. 3. Check that the drive from the motor reaches the front shift guide. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. DF shift motor 1 front and DF main PWB (YC14) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the DF shift motor 1 front.
  DF shift sensor 1 front 1. Execute U241 Finisher - Shift Front 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. DF shift sensor 1 front and DF main PWB (YC23) 4. Replace the DF shift sensor 1 front.
  DF main PWB Replace the DF main PWB.