• Code: SC485
• Description: Waste toner bottle motor error
  The lock signal of the waste toner bottle motor remains HIGH for more than 600 ms.
• Causes: • Waste toner bottle motor defective

• Code: SC487
• Description: Waste toner bottle set error
  The set sensor of the waste toner bottle remains LOW for more than 500 ms. (The sensor goes HIGH when the bottle is installed correctly.)
• Causes: • Install the waste toner bottle • Remove waste toner bottle and reinstall correctly

• Code: SC488
• Description: Waste toner transport lock
  Waste toner cannot be transported to the waste toner bottle.
• Causes: • Blockage in the line to the waste toner bottle

• Code: SC496
• Description: MUSIC sensor error
  The MUSIC sensor detected an abnormal pattern on the ITB because: • ADC exceeded upper or lower limit. • The pattern used to calculate the amount of skew is abnormal. • The reading of the pattern exceeded the length of time the LED projected light. • LED light could not be adjusted correctly.
• Causes: • MUSIC sensor defective or disconnected • MUSIC pattern abnormal; do a forced process control (SP3821) and check the result (section 4.2.4).

• Code: SC497
• Description: Temperature and humidity sensor error 1: PCU
  The thermistor output of the temperature and humidity sensor above the black PCU was not within the prescribed range (0.5V to 4.2V)
• Causes: • Temperature and humidity sensor harness disconnected, loose, defective • Temperature and humidity sensor defective

• Code: SC498
• Description: Temperature and humidity sensor error 2
  The thermistor output of the temperature and humidity sensor at below the waste toner bottle was not within the prescribed range (0.5V to 4.2V)
• Causes: • Temperature and humidity sensor harness disconnected, loose, defective • Temperature and humidity sensor defective

• Code: SC503
• Description: Tray 1 feed error
  • The lift sensor is not activated within 10 seconds after the tray lift motor starts lifting the bottom plate. • When the tray lowers, the tray lift sensor does not go off within 1.5 sec.
• Causes: • Tray lift motor defective or disconnected • Paper or other obstacle trapped between tray and motor • Pick-up solenoid disconnected or blocked by an obstacle

• Code: SC504
• Description: Tray 2 feed error
  • The lift sensor is not activated within 10 seconds after the tray lift motor starts lifting the bottom plate. • When the tray lowers, the tray lift sensor does not go off within 1.5 sec.
• Causes: • Tray lift motor defective or disconnected • Paper or other obstacle trapped between tray and motor • Pick-up solenoid disconnected or blocked by an obstacle