Samsung CLX-8640 series Service Manual page 419

► Error Code
U3–3711
U3–3713
U3–3714
► Error message
Original paper jam in the exit area of scanner
► Symptom
Original jam has occurred around the scan in roller and regi roller.
► Troubleshooting method
1) Check if the pick up motor operates normally.
2) Open the ADF cover. Check if the paper jam is occurred.
3) Pull the green lever of the Guide Exit Lower. Remove the jammed paper.
4) Check if there are any obstacles or contamination in the paper path. Remove it.
5) If the problem persists, check the exit sensor and connection.
a) Remove the DADF Unit and white sponge.
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4. Troubleshooting
4-260