• Code: SC77-21
• Description: After the home position search operation of the rear stopper motor (M26) starts, the rear stopper home sensor (PS35) does not turn ON within a specified period of time.
• Causes: FNS control board (FNSCB) FNS drive board (FNSDB) Rear stopper motor (M26) Rear stopper home sensor (PS35)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-22
• Description: After the home position search operation of the stack assist guide motor (M24) starts, the stack assist home sensor (PS32) does not turn ON within a specified period of time.
• Causes: FNS control board (FNSCB) FNS drive board (FNSDB) Stack assist guide motor (M24) Stack assist home sensor (PS32)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-25
• Description: After the home position search operation of the intermediate roller open close motor (M25) starts, the intermediate roller home sensor (PS33) does not turn ON within a specified period of time.
• Causes: FNS control board (FNSCB) FNS drive board (FNSDB) Intermediate roller open close motor (M25) Intermediate roller home sensor (PS33)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-28
• Description: Data was resent according to the re-dispatch request of communication data, but the error recurs.
• Causes: FNS control board (FNSCB)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-30
• Description: After the 1st folding release motor (M14) turns ON, the 1st folding cam home sensor (PS55) does not turn ON within a specified period of time.
• Causes: 1st folding release motor (M14) Folding drive board (FDB) 1st folding cam home sensor (PS55)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-31
• Description: After the 2nd folding release motor (M15) turns ON, the 2nd folding cam home sensor (PS56) does not turn ON within a specified period of time.
• Causes: 2nd folding release motor (M15) Folding drive board (FDB) 2nd folding cam home sensor (PS56)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-32
• Description: After the 3rd folding release motor (M16) turns ON, the 3rd folding cam home sensor (PS57) does not turn ON within a specified period of time.
• Causes: 3rd folding release motor (M16) Folding drive board (FDB) 3rd folding cam home sensor (PS57)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC77-33
• Description: The 2 holes punch home sensor (PS8) does not turn OFF within a specified period of time after the 2 holes punch home position return operation starts. Or, after the punch motor (M10) turns ON, the 2 holes punch home sensor (PS8) does not turn OFF.
• Causes: Punch motor (M10) Punch drive board (PDB) 2 holes punch home sensor (PS8)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).