• Code: E537-8001
• Description: Rear alignment error Finisher-Y1, Saddle Finisher-Y2
  The HP sensor fails to be OFF 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: E537-8002
• Description: Front alignment error Finisher-Z1
  The HP sensor fails to be OFF within 1000ms after the front adjuster plate starts to move from its HP.
• Remedy: Replace the front adjuster plate HP sensor (SR3) , Replace the front adjuster plate motor (M3) , Replace the adjuster plate drive belt

• Code: E537-8002
• Description: Rear alignment error Finisher-Y1, Saddle Finisher-Y2
  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: E540-8001
• Description: Upper tray up/down error Finisher-Y1, Saddle Finisher-Y2
  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: E540-8002
• Description: Stack tray up/down error Finisher-Z1
  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: E540-8002
• Description: Upper tray up/down error Finisher-Y1, Saddle Finisher-Y2
  Area is abnormal.
• Remedy: Replace the shift motor (M37) of the tray 1, Replace the shift area sensor PCB of the tray 1

• Code: E540-8003
• Description: Stack tray up/down error Finisher-Z1
  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: E540-8003
• Description: Upper tray up/down error Finisher-Y1, Saddle Finisher-Y2
  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