• 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: CF side registration motor 1. CF side registration sensor 1. CF main PWB.
• Remedy: CF side registration motor 1 1. Execute U240 Booklet - Width Test to check the finisher operation. 2. Manipulate the side registration lower guide back and forth to check it can smoothly operable. 3. Check that the drive from the motor reaches the side registration lower guide. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. CF side registration motor 1 and CF main PWB (YC10) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the CF side registration motor 1.
  CF side registration sensor 1 1. Execute U241 Booklet - Width Down 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. CF side registration sensor 1 and CF main PWB (YC20) 4. Replace the CF side registration sensor 1.
  CF main PWB Replace the CF main PWB

• Code: 8360
• Description: CF main motor error (4000-sheet finisher)
  During driving the motor, the lock signal is detected for 1 s continuously.
• Causes: CF main motor. CF main PWB.
• Remedy: CF main motor 1. Execute U240 Booklet - Folding to check the finisher operation. 2. Manipulate the conveying roller to check it can smoothly rotate. 3. Check that the drive from the motor reaches the conveying roller. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. CF main motor and CF main PWB (YC16) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the CF main motor.
  CF main PWB Replace the CF main PWB

• Code: 8370
• Description: CF staple motor error 2 (4000-sheet finisher)
  Staple JAM (DF) has been detected twice in a row. (The second JAM detection condition fullfilled with a lock detection signal maintained 1 V for 1000 ms continuously, while the stapler motor was driven.)
• Causes: CF staple motor. CF main PWB.
• Remedy: CF staple motor 1. Execute Booklet - Staple of U240 finisher operation check. 2. Manipulate the staple up and down to check it is smoothly operable. 3. Check that the drive from the motor reaches the staple unit. 4. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. CF staple unit and CF main PWB (YC13) 5. If the wiring is disconnected, shorted or grounded, replace the wiring. 6. Replace the CF staple unit.
  CF main PWB Replace the CF main PWB.

• 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 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 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 (YC7) (4000-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: 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 motor. 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 (YC7) (4000-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: 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 (YC7) (4000-sheet finisher) Punch PWB (YC1) and DF main PWB (YC8) (1000-sheet finisher) 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: 8500
• Description: Mailbox communication error (4000-sheet finisher)
  Communication failed to be established after the mailbox was hooked up.
• Causes: MB main PWB. DF main PWB.
• Remedy: MB main PWB 1. Turn the main power switch off and after 5 seconds, turn it on. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. MB main PWB (YC3) and DF main PWB (YC6) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the MB main PWB
  DF main PWB Replace the DF main PWB

• Code: 8510
• Description: MB conveying motor error 1 (4000-sheet finisher)
  When initial operation, MB home position sensor does not turn on within 5 s.
• Causes: MB conveying motor. MB home position sensor. MB main PWB.
• Remedy: MB conveying motor 1. If the transfer roller won’t rotate smoothly, repair its mechanism. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. MB conveying motor and MB main PWB (YC5) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the MB conveying motor.
  MB home position sensor 1. Execute U241 Mail Box - Motor 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. MB home position sensor and MB main PWB (YC2) 4. Replace the MB home position sensor.
  MB main PWB Replace the MB main PWB