• Code: F46-64
• Description: Image control abnormality
  The PWM γ curve could not be generated properly.
• Causes: TCSB (toner control sensor board)

• Code: F52-01
• Description: Fan abnormality
  FM13 (power supply cooling) EM signal was abnormal 2 seconds after turning ON FM13. 2 seconds after turning FM13 OFF and ON again, the signal is still abnormal.
• Causes: FM13 (power supply cooling) DCPS (DC power supply unit)

• Code: F52-02
• Description: Fan abnormality
  The MAINFAN_EM signal was abnormal 2 seconds after turning ON FM1 (main body cooling /1). 2 seconds after turning OFF and ON again, the signal is still abnormal.
• Causes: FM1 (main body cooling /1) PRCB (printer control board)

• Code: F53-01
• Description: Motor abnormality
  5 seconds or later after turning ON M4 (fixing), an abnormal MAINM_EM signal has been detected for 1 consecutive second.
• Causes: M4 (fixing) PRCB (printer control board)

• Code: F62-01
• Description: Fan Abnormality
  FM301 (original conveyance motor cooling) EM signal was abnormal 2 seconds after turning ON FM301. 2 seconds after turning FM301 OFF and ON again, an abnormal detection signal is detected.
• Causes: SCDB (scanner drive board) FM301 (original conveyance motor cooling)

• Code: F77-1
• Description: (FN-112/ 6/121/10/ 115) After M702 (shift) starts operation, the shift unit does not reach the shift position or the HP within the specified time.
• Causes: FNSCB (FNS control board) M702 (shift) PS718 (shift HP)

• Code: F77-1
• Description: (OT-104) PS702 (shift HP) does not turn ON within the predefined time after M703 (shift) starts operation.
• Causes: SFCB (SF control board) M703 (shift) PS702 (shift HP)

• Code: F77-11
• Description: FN-112/6/ 121/10/115 abnormality
  (FN-112/ 6/121/10) After M714 (stapler /F) starts operation, PS731 (stapler HP/F) does not turn ON within the specified time.
• Causes: FNSCB (FNS control board) RB (relay board) M714 (stapler /F) PS731 (stapler HP/F)