• Code: SC507
• Description: Tandem tray lift error (optional LCT)
  The lower limit sensor is not activated after the paper tray lift motor has been on to lower the tandem tray for 8 seconds.
• Causes: • Paper tray lift motor defective • Lower limit sensor defective • Too much load on the drive mechanism

• Code: SC508
• Description: Rear fence drive error (optional LCT)
  The return position sensor is not activated after the rear fence drive motor has been on to lower the tandem tray for 8 seconds.
• Causes: • Rear fence motor defective • Return position sensor defective • Too much load on the drive mechanism

• Code: SC509
• Description: Side fence drive error (optional LCT)
  The side fence positioning sensor is not activated for more 3 seconds when the paper stack in the left tray is moved to the right tray. The side fence close sensor is not activated for more 3 seconds after moving the paper stack to the right tray.
• Causes: • Side fence motor defective • Side fence position sensor defective • Side fence close sensor defective • Too much load on the drive mechanism

• Code: SC541
• Description: Fusing thermistor open
  The fusing temperature detected by the thermistor was below 55 °C for 15 seconds or below 75 °C for 20 seconds.
• Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Fusing thermofuse open • Power supply board defective • Poor connection of the fusing unit

• Code: SC542
• Description: Fusing temperature warm-up error
  The fusing temperature does not reach 155 °C within 60 seconds after the main switch is turned on.
• Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Fusing thermofuse open • Power supply board defective • Poor connection of the fusing unit

• Code: SC543
• Description: Fusing overheat error
  A fusing temperature of over 231°C is detected for 1 second by the fusing thermistor.
• Causes: • Fusing thermistor defective • Power supply board defectivee mechanism

• Code: SC544
• Description: Fusing low temperature error
  A fusing temperature of lower than 100°C is detected for 1 second by the fusing thermistor.
• Causes: • Fusing thermistor defective • Power supply board defective • Poor connection of the fusing unit

• Code: SC546
• Description: Unstable fusing temperature
  Fusing temperature more than 60 °C: The fusing temperature does not rise 2°C or more within 6 seconds after the fusing lamp has been on. Fusing temperature 60 °C or less: The fusing temperature does not rise 2°C or more during a 6 second interval (the 6 s timer starts 14 s after the fusing lamp turned on).
• Causes: • Thermistor defective • Poor connection of the fusing unit • Power supply unit defective