• Code: 504
• Description: Tray 4 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: 507
• Description: LCT feed motor malfunction
  One of the following conditions is detected:
  • The LD signal from the feed motor is detected abnormal for 50 ms after the motor switches on.
  • At power on, the motor is detected loose or disconnected
• Causes: • Feed motor defective
  • Feed motor connector disconnected
  • Obstacle interfering with mechanical movement of motor.

• Code: 510
• Description: LCT tray malfunction
  One of the following conditions is detected:
  • When the bottom plate is lifted, the upper limit sensor does not come on for 18 s.
  • When the bottom plate is lowered, the lower limit sensor does not come on for 18 s.
  • After lift begins, the upper limit sensor does not switch on before the pick-up solenoid switches on.
  • The paper end sensor switches on during lift and the upper limit sensor does not switch on for 2.5 s, and a message prompts user to reset paper.
• Causes: • Tray lift motor defective or connector disconnected
  • Lift sensor defective or disconnected
  • Pick-up solenoid defective or disconnected
  • Paper end sensor defective

• Code: 515
• Description: Tandem rear fence motor error
  One of the conditions is detected:
  • The return sensor does not switch on within 10 sec. after the rear fence motor switches on.
  • The HP sensor does not switch on 10 sec. after the rear fence motor switches on.
  • The HP sensor and return sensor switch on at the same time.
• Causes: • Rear fence motor defective or poor connection
  • Paper or other obstacle interfering with operation of the sensors
  • Paper or other obstacle trapped between tray and motor
  • Motor mechanical overload due to obstruction
  • Return sensor or HP sensor defective or dirty Note (B246)
  • This problem will not issue the SC code on the operation panel.
  • The machine will prompt the operator to reset tray by opening and closing it.
  • If the problem persists, the machine will display again and the tray cannot be used.

• Code: 520
• Description: Duplex jogger motor error 1
  When the jogger fence moves to the home position, the jogger HP sensor does not turn on even if the jogger fence motor has moved the jogger fence 153.5 mm
• Causes: • Paper or other obstacle has jammed mechanism
  • Sensor connector disconnected or defective
  • Sensor defective

• Code: 521
• Description: Duplex jogger motor error 2
  When the jogger fence moves from the home position, the jogger fence HP sensor does not turn off even if the jogger motor has moved the jogger fence 153.5 mm.
• Causes: • Paper or other obstacle has jammed mechanism
  • Sensor connector disconnected or defective
  • Sensor defective

• Code: 531
• Description: Fusing exit motor error
  The PLL lock signal was low for 2 seconds during motor operation.
• Causes: • Motor lock caused by physical overload
  • Motor drive PCB defective

• Code: 541
• Description: Fusing thermistor open
  The fusing temperature detected by the center thermistor was below 0°C for 7 sec.
• Causes: • Thermistor open
  • Thermistor connector defective
  • Thermistor damaged, or out of position
  • Fusing temperature –15% less than the standard input voltage