Samsung CLX-8540ND Service Manual page 323

Troubleshooting
● Code : 53-001 ● Error message : Finisher jam door is open. Close it
● Symptom : Although the finisher door is closed, the error message will be displayed.
● Possible Cause: Finisher jam door sensor defect, Finisher jam door flag defect.
● Troubleshooting method :
1. Check if the Finisher jam door sensor is operated properly.
2. Check if the Finisher Jam door flag is broken.
3. If the problem persists, replace the finisher main board.
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