• Code: F23-01
• Description: Motor abnormarity
  An error for TONERM_EM signal is detected when 7 seconds have passed since M13 (toner bottle) has turned ON.
• Causes: M13 (toner bottle) PRCB (printer control board)

• Code: F23-02
• Description: Motor abnormarity
  An error for DEVM_EM signal is detected when more than 1 second has passed since M3 (developing) has turned ON.
• Causes: M3 (developing) PRCB (printer control board)

• Code: F23-03
• Description: Motor abnormarity
  An error for DRUM_EM signal is detected when more than 3 seconds have passed since M2 (drum) has turned ON.
• Causes: M2 (drum) PRCB (printer control board)

• Code: F28-01
• Description: High-voltage power error
  5 consecutive charging ON/OFF operations have been executed since the charging error detection signal has been detected while charging is turned ON.
• Causes: HV (high-voltage unit)

• Code: F28-02
• Description: High-voltage power error
  5 consecutive transfer ON/OFF operations have been executed since the transfer error detection signal has been detected while transfer is turned ON.
• Causes: HV (high-voltage unit)

• Code: F28-03
• Description: High-voltage power error
  5 consecutive separation ON/OFF operations have been executed since the separation error detection signal has been detected while separation is turned ON.
• Causes: HV (high-voltage unit)

• Code: F29-01
• Description: Process abnormality
  Dirt correction failure of the Dmax sensor during maximum density adjustment. If this error is detected 10 successive times, the error code is displayed.
• Causes: TSCB (toner control sensor board) PRCB (printer control board)

• Code: F29-03
• Description: Process abnormality
  Control patches are not output while Dmax correction is in process. (No output from the Dmax sensor.)
• Causes: TSCB (toner control sensor board) PRCB (printer control board)