• Code: SC490
• Description: Peltier Unit error The Abnormal Condition signal or the Peltier Unit is received 10 times.
• Remedy: • Peltier Unit is defective

• Code: SC496
• Description: MUSIC sensor error The MUSIC sensor detected an abnormal pattern on the ITB because: • A/D converter 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.
• Remedy: • 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)
• Remedy: • 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)
• Remedy: • Temperature and humidity sensor harness disconnected, loose, defective • Temperature and humidity sensor defective

• Code: SC499
• Description: ITB Position Sensor error Abnormal ITB Position Sensor output.
• Remedy: • ITB Position Sensor 1 or 2 is dirty. • ITB Position Sensor 1 or 2 is defective. • ITB encoder strip is dirty, • ITB encoder strip is damaged. • ITB movement error (e.g. the belt cannot rotate correctly due to friction). 1. Connectors for ITB Position Sensor 1 or 2 are not connected correctly.

• Code: SC501
• Description: Tray 1 (tandem tray) feed error (Japan Only) • The tray 1 lift sensor does not switch ON 10 s after the tray lift motor switches ON and starts lifting the bottom plate. • When the tray lowers, the tray lift sensor does not go off within 1.5 sec. • The lower limit sensor of the tandem tray does not detect the lower limit within 10 sec.
• Remedy: • Tray lift motor harness disconnected, loose, defective • Paper or other obstacle trapped between tray and motor • Tray lift sensor disconnected, damaged • Lower limit sensor disconnected, damaged • Pick-up solenoid disconnected, blocked by an obstacle

• Code: SC502
• Description: Tray 2 (paper cassette) feed error (Japan Only) • 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. • The lower limit sensor of the tandem tray does not detect the lower limit within 10 sec.
• Remedy: • 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: 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.
• Remedy: • Tray lift motor defective or disconnected • Paper or other obstacle trapped between tray and motor • Pick-up solenoid disconnected or blocked by an obstacle