• Code: 503-01-11
• Description: Paper bank 1 error (Paper Feed Unit or LCT) (Paper lift error) (D158/D159)
  The paper lift sensor fails to activate after the tray lift motor has been on for 18 seconds
• Causes: • Paper lift sensor • Tray lift motor • Poor tray lift motor connection • Broken harness • Defective bank controller board

• Code: 503-02-12
• Description: Paper bank 1 error (Paper Feed Unit or LCT) (Upper limit error) (D158/D159)
  The paper lift sensor fails to activate three times continuously right after the tray lift motor has been turned on.
• Causes: • Paper lift sensor • Broken harness • Defective bank controller board

• Code: 504
• Description: Tray 4 error (D160/D161/D170)
  The paper lift sensor fails to activate three times continuously after the tray lift motor has been on for 18 seconds.
• Causes: • Paper lift sensor • Tray lift motor • Broken harness • Defective bank controller board

• Code: 504-01-11
• Description: Paper bank 2 error (Paper Feed Unit or LCT) (Paper lift error) (D158/D159)
  The paper lift sensor fails to activate after the tray lift motor has been on for 18 seconds.
• Causes: • Paper lift sensor • Tray lift motor • Broken harness • Defective bank controller boardnds.

• Code: 504-02-12
• Description: Paper bank 2 error (Paper Feed Unit or LCT) (Upper limit error) (D158/D159)
  The paper lift sensor fails to activate right after the tray lift motor has been turned on.
• Causes: • Paper lift sensor • Broken harness • Defective bank controller board

• Code: 508
• Description: By-pass bottom plate error
  The signal from the by-pass tray HP sensor does not change for 1.0 second after the by-pass motor has rotated counterclockwise. If this condition occurs three consecutive times, the SC is generated.
• Causes: • Disconnect or defective harness of the by-pass motor • Defective or disconnected connection for the by-pass motor.

• Code: 520
• Description: Registration motor error
  When the registration motor is rotating
• Causes: • Motor lock • Defective motor driver

• Code: 521
• Description: Bank transport motor error (D160/D161/D170)
  The error code occurs when the optional paper tray unit (D698) is installed.
• Causes: • Defective bank transport motor • Loose connection • Defective bank controller board