• Code: C544
• Description: Fusing Overheat Error 2: Hardware
  The fusing temperature monitoring circuit detects abnormal fusing temperature.
• Causes: • AC drive board defective (TRIAC short)
  • BCU defective
  • BCU firmware defective

• Code: SC101
• Description: Exposure Lamp Error
  The standard white level was not detected properly when scanning the white plate.
• Causes: • Exposure lamp defective
  • Lamp stabilizer defective
  • Exposure lamp connector defective
  • Scanner motor control unit (MCU board) defective
  • SBU board defective
  • Dirty standard white plate
  • Dirty scanner mirror or scanner mirror or lens block out of position

• Code: SC120
• Description: Scanner Home Position Error 1
  The scanner home position sensor does not detect the OFF condition during initialization or copying
• Causes: • Scanner home position sensor defective
  • Poor connection between HP sensor and MCU board
  • Scanner motor control unit (MCU board) defective
  • Scanner wire, timing belt, pulleys, or carriage out of position
  • Scanner motor defective
  • Poor connection or defective harness between MCU board and scanner motor

• Code: SC121
• Description: Scanner Home Position Error 2
  Scanner home position sensor does not detect ON.
• Causes: • Scanner home position sensor defective
  • Poor connection between MCU board and scanner home position sensor
  • Harness between MCU board and sensor defective
  • MCU board defective
  • Scanner wire, timing belt, pulleys, or carriage out of position
  • Scanner drive motor defective
  • Harness between MCU board and scanner motor disconnected

• Code: SC124
• Description: Encoder Signal Error
  The scanner motor encoder connector is not set correctly, or the encoder signal was not input.
• Causes: • Scanner motor encoder connector disconnected
  • Scanner motor lead connector disconnected
  • Scanner motor defective
  • MCU board defective (scanner motor control unit)
  • Scanner wire, timing belt, pulleys, or carriage installation incorrect
  • Power supply connector disconnected (+38V +-24V)
  • Power supply unit (PSU-E board) defective

• Code: SC125
• Description: Scanner Motor Error 1
  Scanner motor stopped before feedback from scanner HP sensor detected, or motor speed too slow when detected at scanner HP sensor.
• Causes: • Scanner motor defective (high torque)
  • Overload on scanner drive mechanism
  • MCU board defective (scanner motor unit control)

• Code: SC126
• Description: Scanner Motor Error 2
  The scanner motor does not stop within 15 mm after the scanner home position sensor turns on when the scanner returns.
• Causes: • Scanner motor defective (low torque)
  • Overload on scanner drive mechanism
  • MCU board defective (scanner motor control unit)

• Code: SC127
• Description: Scanner Motor Error 3
  The scanner motor rotates in the opposite direction to the signal from the MCU board
• Causes: • Scanner motor defective (motor lead connected incorrectly)
  • MCU board defective (scanner motor control unit)