Oki MC573dn User Manual page 193

17
Close the output tray (d) slowly and push the center of the output tray for
confirmation.
18
Hold the handle (B) to close the scanner unit (c).
Do not close the scanner unit vigorously. It may cause the document feed roller of ADF to fall and get in the way
of loading documents.
If the document feed roller of ADF has fallen, open and close the ADF cover.
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9. Troubleshooting