Scanner Locked Or Another Problem Occurred - Samsung CLX-8640 series Service Manual

4. Troubleshooting
► Error Code
S3–3121
► Error message

Scanner locked or another problem occurred.

► Symptom
Scanner module does not move.
► Troubleshooting method
1) Open the DADF unit.
2) Check if the scan locking switch is in lock status. Release it. Close the DADF unit.
3) If the problem persists, remove the scan rear cover. Check if all cables on scan joint board are connected correctly.
4) Remove the rear cover. Check if the connector on the main board is connected correctly.
5) Remove the scan glass.
(Refer to 3.3.22.1 Scan Glass.)
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