Canon imageCLASS MF7480 imageCLASS MF7400 Series Basic Operation Guide - Page 346

Adjustment/Cleaning Setting Item Transfer Roller Cleaning Fixing Unit Cleaning Feeder Cleaning Special Mode M Standard Low Moderate High Special Mode N Auto Manual Medium High Off Description Cleans the transfer roller. (See "Transfer Roller," on p. 10‑11.) Cleans the fixing unit. (See "Fixing Unit," on p. 10‑3.) Cleans the rollers of the feeder. (See "Automatic Feeder Cleaning," on p. 10‑9.) Sets to improve print quality or fix irregular print density. If print quality decreases or an irregularity in the print density appears, transcription output may not function adequately. Normal transcription output. Lower than normal transcription output. Selecting [Low] may be effective when printing on paper that contains a lot of moisture because it was stored for a long period of time after opening, or when printing on recycled paper. Slightly higher than normal transcription output. Higher than normal transcription output. Selecting [High] may be effective when printing on the heavyweight paper. Sets whether to prevent paper curls or jams which may occur when printing on paper that has absorbed moisture. - Do not use paper that has been exposed to high temperature or humidity for an extended period of time. Printing on such paper will frequently result in a paper jam. - Printing times with Special Mode N activated are longer than when the function is not used. - If you select [Medium] or [High] when paper is not moistened, the print quality may be deteriorated. Automatically switches to the appropriate curl prevention level. Enables manual selection of [Medium] or [High]. Prevents curling of paper that has absorbed moisture. Prevents paper curls more efficiently than when [Medium] is selected. Disables Special Mode N. Machine Settings 12‑17