• Code: 441
• Description: Development motor lock
  The development motor lock signal remains high for 2 seconds while the development motor is on.
• Causes: • Drive mechanism overloaded due to toner clumping in the wasted toner path
  • Motor driver board defective

• Code: 490
• Description: Main fan error
  The main fan motor lock signal goes high for 5 s while the fan is on.
• Causes: • Fan motor overloaded due to obstruction
  • Fan connector disconnected

• Code: 495
• Description: Toner recycling unit error
  Encoder pulse does not change for 3 s after the main motor switches on.
• Causes: • Waste toner transport has stopped due to motor overload
  • Toner end sensor detective, disconnected

• Code: 496
• Description: Toner collection bottle errorThe toner collection bottle set switch remains off when the front door is closed.
• Causes: • No toner collection bottle set
  • Poor connection of the switch connector

• Code: 497
• Description: Toner collection motor error
  The toner collection motor connector set signal remains off for 1 s.
• Causes: • Toner pump motor defective
  • Motor connector loose, disconnected

• Code: 501
• Description: Tray 1 lift malfunction
  • 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.
  • Tray overload detected when the tray is set.
  • The lower limit sensor of the LCT does not detect the lower limit within 10 sec.
• Causes: • Tray lift motor defective, disconnected
  • Paper or other obstacle trapped between tray and motor
  • Pick-up solenoid disconnected, blocked by an obstacle
  • Too much paper loaded in tray Note (B246)
  • At first, the machine displays a message asking the operator to reset the tray.
  • This SC will not display until the operator has pulled the tray out and pushed it in 3 times.
  • If the operator cycles the machine off/on before the 3rd opening and closing of the tray, the 3-count is reset.

• Code: 502
• Description: Tray 2 lift malfunction
  • 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.
  • Tray overload detected when the tray is set.
• 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
  • Too much paper loaded in tray Note (B246)
  • At first, the machine displays a message asking the operator to reset the tray.
  • This SC will not display until the operator has pulled the tray out and pushed it in 3 times.
  • If the operator cycles the machine off/on before the 3rd opening and closing of the tray, the 3-count is reset.

• Code: 503
• Description: Tray 3 lift malfunction
  • 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.
  • Tray overload detected when the tray is set.
• 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
  • Too much paper loaded in tray Note (B246)
  • At first, the machine displays a message asking the operator to reset the tray.
  • This SC will not display until the operator has pulled the tray out and pushed it in 3 times.
  • If the operator cycles the machine off/on before the 3rd opening and closing of the tray, the 3-count is reset.