• Code: 546
• Description: Unstable fusing temperature
  While the fusing lamp is on, the fusing temperature varies 50°C or more within one second; and this occurs two consecutive times.
• Causes: • Defective thermistor
  • Incorrect installation of the thermistor
  • Defective power supply unit

• Code: 547
• Description: Zero cross signal malfunction
  The zero cross signal is not detected within five seconds after the main power switch is turned on. Or, the zero cross signal is not detected within one second after operation begins.
• Causes: • Defective power supply unit
  • Defective BICU

• Code: 559
• Description: Consecutive fusing jam
  The paper jam counter for the fusing unit reaches 3 times. The paper jam counter is cleared if the paper is fed correctly. This SC is activated only when SP1159-001 is set to "1" (default "0").
• Causes: • Paper jam in the fusing unit.

• Code: 590
• Description: Exhaust fan motor error
  The exhaust fan motor is locked for five seconds.
• Causes: • Loose connection of the exhaust fan motor
  • Overload

• Code: 632
• Description: MF accounting device error 1
  The machine sends a data frame. No normal end signal returns. This symptom happens three times.
• Causes: • Defective or broken line between machine and device

• Code: 634
• Description: Accounting RAM error
  An error occurs in the backup RAM for the MF accounting device.
• Causes: • Defective accounting device

• Code: 635
• Description: Accounting battery error
  An error occurs in the battery of the MF accounting device.
• Causes: • Defective accounting device

• Code: 692
• Description: Printer board communication error
  • BICU does not get a signal from the printer board for 1.5 seconds or more.
  • BICU gets a break-signal after completing the communication with the printer board and does not get a signal from the printer board for 10 seconds or more.
• Causes: • Defective communication between BICU and printer board