Canon DR-9080C - Manual (Page 97)

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7
5
Firmly close the roller holder until you hear it click.
6
Firmly close the roller cover until you hear it click.
7
Carefully close the upper scanner.
If the roller holder and roller cover are not firmly closed it will cause a feed error.
Always be sure to check that the roller holder and roller cover are closed.
Important
7.2 Replacing the Rollers