Oki LD670 User Manual page 188

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Cleaning the Lower cutter
Using a general-purpose utility knife, flathead screwdriver, or similar
tool, remove the adhesive matter adhering to the surface and edge of
the Lower cutter.
Note: Be very careful not to damage the edge of the Lower cutter when handling
the utility knife or screwdriver. Also take care not to dent or otherwise
damage the platen roller. A dent on the platen roller may result in
incomplete printing or line feed errors.
Lower
cutter
186