If The Error Code Is "390 - Oki MC563 MFP User Manual

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.

If the Error Code is "390"

1
If documents are set in the ADF or on the document glass, remove them.
2
If paper is loaded on the MP tray, remove the paper.
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9. Troubleshooting