• Code: E537-0002
• Description: Rear alignment error Finisher-Q1/Q3, Saddle Finisher-Q2/Q4
  The HP sensor fails to be ON after the swing motor rotates for a specific period of time.
• Remedy: Replace the rear adjuster plate HP sensor (PI37) , Replace the rear adjuster plate motor (M34)

• Code: E540-0001
• Description: Upper tray up/down error
  The upper tray up/down motor clock is abnormal.
• Remedy: Replace the shift motor (M37) of the tray 1, Replace the shift area sensor PCB of the tray 1

• Code: E540-0002
• Description: Stack tray up/down error Finisher-P1
  Paper surface detection fails to end within 1000ms.
• Remedy: Replace the stack tray top paper sensor (SR9) , Replace the stack tray bottom paper sensor (SR10) , Replace the stack tray upper limit sensor (SR13) , Replace the stack tray lower limit sensor (SR12) , Replace the stack tray shift motor (M7)

• Code: E540-0002
• Description: Upper tray up/down error
  Area is abnormal.
• Remedy: Replace the shift motor (M37) of the tray 1, Replace the shift area sensor PCB of the tray 1

• Code: E540-0003
• Description: Stack tray up/down error Finisher-P1
  Encoder lock within 200ms fails to reach 10pulse during paper surface detection.
• Remedy: Replace the stack tray top paper sensor (SR9) , Replace the stack tray bottom paper sensor (SR10) , Replace the stack tray upper limit sensor (SR13) , Replace the stack tray lower limit sensor (SR12) , Replace the stack tray shift motor (M7)

• Code: E540-0003
• Description: Upper tray up/down error
  The safety switch is activated.
• Remedy: Replace the shift motor (M37) of the tray 1, Replace the shift area sensor PCB of the tray 1

• Code: E540-0004
• Description: Stack tray up/down error Finisher-P1
  Outputs of the top paper sensor, bottom paper sensor, tray upper limit sensor, and tray lower limit sensor have abnormality during paper surface detection.
• Remedy: Replace the stack tray top paper sensor (SR9) , Replace the stack tray bottom paper sensor (SR10) , Replace the stack tray upper limit sensor (SR13) , Replace the stack tray lower limit sensor (SR12) , Replace the stack tray shift motor (M7)

• Code: E542-0001
• Description: Lower tray up/down error Finisher-Q1/Q3, Saddle Finisher-Q2/Q4
  The lower tray up/down motor clock is abnormal.
• Remedy: Replace the shift motor (M38) of the tray 2, Replace the shift area sensor PCB of the tray 2