• Code: F77-56
• Description: ZK-2/3 abnormality
  Abnormality is found in EM signal of M10 (conveyance motor fan) within the specified time after M10 has been turned ON, and the abnormality remains even when retry operation is executed 3 times after it is turned OFF.
• Causes: M10 (conveyance motor fan) PZCB (PZ control board)

• Code: F77-57
• Description: ZK-2/3 abnormality
  M4 (punch) does not turn OFF within the specified time after it has started the operation.
• Causes: M4 (punch) PZCB (PZ control board)

• Code: F77-58
• Description: ZK-2/3 abnormality
  After M8 (Punch switching motor) searches home position, MS2 (Punch switching MS) does not switch from ON to OFF/OFF to ON.
• Causes: M8 (Punch switching motor) MS2 (Punch switching MS) PZCB (PZ control board)

• Code: F77-6
• Description: FN-112/6/ 121/10/115 abnormality
  After M711 (stapler movement) starts operation, PS711 (stapler movement HP) does not turn OFF, or does not turn ON after OFF.
• Causes: FNSCB (FNS control board) RB (relay board) M711 (stapler movement) PS711 (stapler movement HP)

• Code: F77-7
• Description: FN-112/6/ 121/10/115 abnormality
  After M704 (clincher rotation) starts operation, PS714 (clincher rotation HP) does not turn OFF, or does not turn ON after OFF.
• Causes: FNSCB (FNS control board) RB (relay board) M704 (clincher rotation) PS714 (clincher rotation HP)

• Code: F77-8
• Description: FN-112/6/ 121/10/115 abnormality
  (FN-112/ 6/121/10) After M706 (stapler rotation) starts operation, PS713 (stapler rotation HP) does not turn OFF, or does not turn ON after OFF.
• Causes: FNSCB (FNS control board) RB (relay board) M706 (stopler rotation /R) PS713 (stapler rotation HP)

• Code: F77-8
• Description: FN-112/6/ 121/10/115 abnormality
  (OT-104) After M704 (stapler rotation) starts operation, PS714 (stapler rotation HP) does not turn ON, or does not turn ON after OFF.
• Causes: FNS CB (FNS control board) M704 (stapler rotation) PS714 (stapler rotation HP)

• Code: F77-81
• Description: FN-112/6/ 121/10/115 abnormality
  After MC712 (gate drive) starts operation, PS716 (gate HP) does not turn ON within the specified time or does not turn OFF after ON.
• Causes: FNSCB (FNS control board) RB (relay board) M712 (gate drive) PS716 (gate HP)