• Code: F77-44
• Description: PK-5 abnormality
  PS803 (punch shift HP) does not turn ON within the specified time after M802 (punch shift) operation has been started.
• Causes: FNSCB (FNS control board) PKDB (PK drive board) M801 (punch) PS803 (punch HP)

• Code: F77-46
• Description: ZK-2/3 Akit abnormality
  EM signal abnormality is detected within the specified time after FM701 (stacker fan) is turned ON.
• Causes: RB (relay board) FNSCB (FNS control board) FM701 (stacker fan)

• Code: F77-47
• Description: FNS/PK-5 abnormality
  Communication abnormality occurred between FNS and PK-5. Abnormality remains even when retry operation is executed four times.
• Causes: RB (relay board) FNSCB (FNS control board) PKDB (PK drive board)

• Code: F77-5
• Description: FN-112/6/ 121/10/115 abnormality
  After M708 (paper exit opening) starts operation, its open/close operation does not finish within the specified time. PS712 (paper exit opening HP) does not turn ON or OFF.
• Causes: FNSCB (FNS control board) M708 (paper exit opening) PS712 (paper exit opening HP)

• Code: F77-52
• Description: ZK-2/3 abnormality
  PS3 (1st stopper HP) does not turn ON within the specified time after M2 (1st stopper) has searched the HP.
• Causes: PZCB (PZ control board) M2 (1st stopper) PS3 (1st stopper HP)

• Code: F77-53
• Description: ZK-2/3 abnormality
  PS2 (2nd stopper HP) does not turn ON within the specified time after M3 (2nd stopper) has searched the HP.
• Causes: PZCB (PZ control board) M3 (2nd stopper) PS2 (2nd stopper HP)

• Code: F77-54
• Description: PK-2/5 abnormality
  After MC801 (punch) starts operation, PS801 (punch HP) does not turn ON within the specified time.
• Causes: FNSCB (FNS control board) PKDB (PK drive board) M801 (punch) PS801 (punch HP)

• Code: F77-55
• Description: ZK-2/3 abnormality
  PS4 (punch shift HP) does not turn ON within the specified time after M5 (punch shift) has started to search the HP.
• Causes: M5 (punch shift) PS4 (punch shift HP) PZCB (PZ control board)