• Code: E520-0001
• Description: - Offset motor or finisher controller PCB failure
  - Offset HP sensor failure The offset motor was driven for 1000 ms in the HP sensor approach direction, but the offset HP sensor did not turn on.
• Remedy: - Check the connector of the offset HP sensor. - Check the connector of the offset motor. - Replace the offset HP sensor. - Replace the offset motor. - Replace the finisher controller PCB.

• Code: E520-0002
• Description: - Offset motor or finisher controller PCB failure
  - Offset HP sensor failure The offset motor was driven for 1000 ms in the HP sensor escape direction, but the offset HP sensor did not turn off.
• Remedy: - Check the connector of the offset HP sensor. - Check the connector of the offset motor. - Replace the offset HP sensor. - Replace the offset motor. - Replace the finisher controller PCB.

• Code: E531-0001
• Description: - Staple unit failure
  - Staple HP sensor failure
  - Finisher controller PCB failure The staple home position was not left when 400 ms have lapsed since start of staple operation.
• Remedy: - Check the connector of the staple unit. - Replace the staple unit. - Replace the finisher controller PCB.

• Code: E531-0002
• Description: - Staple unit failure
  - Staple HP sensor failure - Finisher controller PCB failure The staple home position had been left once, but it was not reached again when 400 ms have lapsed since start of staple operation. In addition, the staple home position could not be reached by performing reverse operation for 400 ms.
• Remedy: - Check the connector of the staple unit. - Replace the staple unit. - Replace the finisher controller PCB.

• Code: E540-0001
• Description: Standard tray shift motor or finisher controller PCB failure
  - Standard tray HP sensor failure - Standard tray clock sensor failure - Standard tray shift motor load failure The standard tray was moved but the paper surface was not detected.
• Remedy: - Check the connector of the standard tray HP sensor. - Check the connector of the standard tray clock sensor. - Check the connector of the standard tray shift motor. - Replace the standard tray HP sensor. - Replace the standard tray clock sensor. - Replace the standard tray shift motor. - Replace the finisher controller PCB.

• Code: E540-0002
• Description: - Standard tray shift motor or finisher controller PCB failure
  - Standard tray HP sensor failure - Standard tray clock sensor failure - Standard tray shift motor load failure Cannot move (to the pickup position) within the specified time.
• Remedy: - Check the connector of the standard tray HP sensor. - Check the connector of the standard tray clock sensor. - Check the connector of the standard tray shift motor. - Replace the standard tray HP sensor. - Replace the standard tray clock sensor. - Replace the standard tray shift motor. - Replace the finisher controller PCB.

• Code: E540-0003
• Description: Standard tray shift motor or finisher controller PCB failure
  - Standard tray HP sensor failure - Standard tray clock sensor failure - Standard tray shift motor load failure The standard tray was operated, but it did not reach the sensor within 300 ms
• Remedy: - Check the connector of the standard tray HP sensor. - Check the connector of the standard tray clock sensor. - Check the connector of the standard tray shift motor. - Replace the standard tray HP sensor. - Replace the standard tray clock sensor. - Replace the standard tray shift motor. - Replace the finisher controller PCB.

• Code: E540-0005
• Description: - Standard tray shift motor or finisher controller PCB failure
  - Standard tray HP sensor failure - Standard tray clock sensor failure - Standard tray shift motor load failure The encoder clock signal was not detected two or more times when the standard tray was operated for 300 ms.
• Remedy: - Check the connector of the standard tray HP sensor. - Check the connector of the standard tray clock sensor. - Check the connector of the standard tray shift motor. - Replace the standard tray HP sensor. - Replace the standard tray clock sensor. - Replace the standard tray shift motor. - Replace the finisher controller PCB.