• Code: E052-0000
• Description: Erroneous connection to duplex unit
  Disconnection of the duplex unit was detected after power-on, detection of normal connection to the duplex unit, and start of communication.
• Remedy: - Check the connectors of the duplex unit and DC controller PCB. - Replace the duplex controller PCB. - Replace the DC controller PCB.

• Code: E100-0000
• Description: BD detection PCB failure
  The BD detection PCB is faulty.
• Remedy: - Check the connector of the BD detection PCB. - Replace the laser scanner unit. - Replace the DC controller PCB.

• Code: E197-0000
• Description: Printer engine communication error
  Erroneous communication between the DC controller PCB and image processor PCB was detected.
• Remedy: - Check the connectors of the DC controller PCB and image processor PCB. - Replace the DC controller PCB for normal connection. - Replace the image processor PCB.

• Code: E500-0001
• Description: Finisher communication error
  Data communication could not be performed normally. It has been retried three times in vain.
• Remedy: - Check the connectors of the finisher controller PCB and DC controller PCB for normal connection. - Replace the finisher controller PCB. - Replace the DC controller PCB.

• 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.