Samsung SCX-340x series Service Manual page 108

4. Alignment and Troubleshooting
► Error Code
U3–3313
U3–3314
► Error message
Document jam. Remove jam.
Document jam. Remove jam.
► Symptom
A document jam was detected in the ADF unit.
► Troubleshooting method
1) Remove the jammed paper from ADF unit.
2) If the error persists, turn the machine off then on.
3) If the document jam occurs continually, open the ADF cover-top. Check if the ADF pick up roller is contaminated
or worn out. Clean or replace it.
4) If the pick up roller is OK, check the followings.
a) Check if the ADF motor is working normally.
b) Check if the connector on the ADF joint board is connected correctly.
5) If the problem persists, replace the ADF unit.
► Error Code
U3–4110
► Error message
Scanner Door Open
► Symptom
ADF or ADF top cover is opened.
► Troubleshooting method
1) Close the ADF unit.
2) Close the ADF top cover.
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