Samsung ML-451 Series Service Manual page 200

4. Alignment and Troubleshooting
► Error Code
M2–1110
► Error message
Paper jam inside of machine.
► Symptom
The paper has jammed at the feed sensor.
► Troubleshooting method
1) Check if the feed sensor connector is connected properly.
2) Check if the Regi. roller is contaminated or worn out.
3) Check if there are any obstacles or contamination in the paper path.
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